Poster Session



TUESDAY 29 SEPTEMBER POSTER SESSION

 

 P1 • Fibre, fibre devices and amplifiers 

 

P.1.1 • Channel Scrambling and Amplification Technique with Multi-mode EDFA for Multi-core Transmission System

Masaki Wada1, Taiji Sakamoto1, Takayoshi Mori11, Shinichi Aozasa1, Takashi Yamamoto1, Fumihiko Yamamoto1; 1NTT corporation, Ibaraki, Japan

We propose channel-dependent gain (CDG) reduction technique using single-core few-mode EDFA for multi-core transmission system. We investigate experimentally the proposed core-mode to LP-mode scrambled conversion characteristics using photonic lantern and realize low CDG independent of mode-dependent gain in EDFA.

 

P.1.2 • Fibre Twisting and Bending Induced Mode Conversion Characteristics in Coupled Multi-core Fibre

Taiji Sakamoto1, Takayoshi Mori2, Masaki Wada1, Takashi Yamamoto1, Fumihiko Yamamoto1; 1NTT corporation, Tsukuba, Japan, 2NTT Corporation, Tsukuba, Japan

We numerically and experimentally investigate the power transfer characteristics between super-modes in coupled multi-core fibre. We reveal that fibre twisting and bending considerably affect mode coupling and show how to suppress impulse response spread taking account of adiabatic/nonadiabatic mode conversion.

 

P.1.3 • Multi-peak-spectra Generation with Multiple Dispersive Waves and Solitons in a Birefringence Tellurite Microstructured Optical Fiber

Yasutake Ohishi1, Tonglei  Cheng1, Hoang Tuan Tong1, Xiaojie  Xue1,  Dinghuan Deng1, Takenobu  Suzuki1; 1TTI, Nagoya, Japan

We demonstrate multiple dispersive waves emitted by multiple solitons in a birefringence tellurite microstuctured optical fiber. Obvious multiple soliton self-frequency shifts are observed in the mid-infrared region.

 

P.1.4 • Tellurite Microstructured Fiber Based Optical Parametric Amplifier

Yasutake Ohishi1, Lei  Zhang1, Hoang Tuan Tong1, Dinghuan Deng1, Harutaka Kawamura1, Takenobu Suzuki1; 1Toyota Technological Institute, Nagoya, Japan

An optical parametric amplifier has been demonstrated by using a 3-m-long tellurite microstructured fiber as the gain medium. Due to the highly nonlinear property, a maximal peak gain of 90.2 dB has been achieved in the S band.

 

P.1.5 • Simultaneous Measurements of Cores in Multi-core Fibre Using OTDR and Fan-in/out Devices

Masaharu Ohashi1, Hitoshi Uemura2, Katsuhiro Takenaga2, Shoichiro Matsuo3, Hirokazu Kubota1, Yuji Miyoshi1; 1Osaka Prefecture University, Sakai, Japan, 2Fujikura Ltd., Sakura, Japan, 3Fujikira Ltd., Sakura, Japan

We propose a technique for measuring properties of cores in a multi-core fibre (MCF) simultaneously by using OTDR and fan-in/out devices. Mode field diameter and relative-index difference of cores in the MCF are successfully estimated by present method.

 

P.1.6 • Measurement of Inter-Core Crosstalk  in Few-Mode Multicore Fibre

Shota Saitoh1, Yusuke Sasaki1, Katsuhiro Takenaga1, Masaharu Ohashi2, Kunimasa Saitoh3, Kazuhide Nakajima4, Shoichiro Matsuo1; 1Fujikura Ltd., Sakura, Chiba, Japan, 2Osaka Prefecture University, Sakai, Osaka, Japan, 3Hokkaido University, Sapporo, Hokkaido, Japan, 4Nippon Telegraph and Telephone Corporation, Tsukuba, Ibaraki, Japan

We propose a technique for measuring properties of cores in a multi-core fibre (MCF) simultaneously by using OTDR and fan-in/out devices. Mode field diameter and relative-index difference of cores in the MCF are successfully estimated by present method.

 

P.1.7 • High-Speed Distributed Strain Measurement using Brillouin Optical Time-Domain Reflectometry Based-on Self-Delayed Heterodyne Detection

Kengo Koizumi1, Yoshihiro Kanda1, Akihiro Fujii1, Hitoshi Murai2; 1Oki Electric Industry Co., Ltd.,, Saitama, Japan, 2Oki Electric Industry Co., Ltd.,, Saitam, Japan

We propose a novel BOTDR technique by using self-delayed interferometer, which realize high-speed measurement and simple configuration simultaneously. Ultra high speed 1km-long distributed measurement of 40 ms was successfully demonstrated with a 1.5 m spatial resolution.

 

P.1.8 • Coherent Optical En/Decoding employing Discrete Prolate Spheroidal Sequences based Super Structured FBGs

Daniel Pastor1, Cristian Triana2, Rocío Baños1; 1Universidad Politécnica de Valencia, Valencia, Spain, 2Univ. Nacl. Colombia, Bogotá DC, Germany

We present the first experimental verification of the coherent optical en/decoding employing Super-Structured Fibre Bragg Gratings performing Discrete Prolate Spheroidal Sequences (DPSS). These devices present promising spectral and temporal characteristics for OCDMA networks and optical encryption applications

 

P.1.9 • Linearly polarized cascaded random fiber laser with ultimate efficiency

Sergey Babin1, Ekaterina Zlobina1, Sergey Kablukov1; 1Institute of Automation and Electrometry SB RAS, Novosibirsk, Russia

We demonstrate a linearly polarized random lasing in a 1-km PM fiber with polarized pumping. Quantum efficiency of pump (~1.05μm) to 3rd Stokes (1.23μm) wave conversion exceeds 80% at ~10W power. Efficient higher-order Stokes generation at telecom wavelengths is possible.

 

P.1.10 • Characterization of Reconfigurable Ultra-narrowband Optical Filters Realized by Localized Dynamic Brillouin Gratings

Marco Santagiustina1, Fabrizio Chiarello1, Dipankar Sengupta2, Luca Palmieri1; 1University of Padova, Padova, Italy, 2Ecole de technologie superieure, Montreal, Canada

We experimentally demonstrate reconfigurable ultra-narrowband optical filters realized bylocalized dynamic Brillouin gratings in a polarization maintaining fiber. The filters are characterized interms of bandwidth, optical signal-to-noise ratio and peak to sidelobe ratio.

 

P.1.11 • Combined Structural and Optical Modelling tool to Optimise Design and Fabrication of Hollow Core Photonic Band Gap Fibres

Gregory Jasion1, Eric Numkam Fokoua1, John Shrimpton1, David Richardson1, Francesco Poletti1; 1University of Southampton, Southampton, United Kingdom

Two powerful simulation tools are combined to predict geometry and optical properties of Hollow Core Photonic Band Gap fibres from their preform structure and draw parameters. Broad parameter space scans allow identifying structures for optimal optical performance.

 

P.1.12 • Measuring the Group Velocity Dispersion of Higher Order Modes in Hollow Core Photonic Bandgap Fibre

Thomas Bradley1, Xin  Wang2, Eric Numkam Fokoua1, Natalie Wheeler1, Francesco Poletti1, Marco Petrovich1, David Richardson1; 1University of Southampton, Southampton, United Kingdom, 2University of Southampto, Southampton, United Kingdom

We present for the first time the group velocity dispersion of multiple distinguishable modes propagating in 3, 7 and 19 cell hollow core photonic bandgap fibres. Measurements are made by direct phase extraction from spectral domain low coherence interferometry.

 

P.1.13 • Few-Mode Fibers with Improved Mode Spacing

Alexander May1, Michalis Zervas1; 1University of Southampton, Southampton, United Kingdom

A simple and intuitive optimization approach is described for the design of composite rotationally asymmetric refractive index fiber profiles with substantially improved mode spacing.

 

P.1.14 • Characterization of Laser Inscribed On-Chip Photonic Lanterns with Different Core Distances

Justus Bohn1, Joel Carpenter2, Simon Gross3, Michael Withford3, Jochen Schröder4; 1CUDOS, Sydney, Australia, 2University of Queensland/CUDOS, Brisbane, Australia, 3Maquarie University/CUDOS, Sydney, Australia, 4RMIT University/CUDOS, Melbourne, Australia

We measured the wavelength-dependent transfer matrix of multiple photonic lanterns withdifferent core spacings using a spatially diverse swept-wavelength interferometer. We characterised themode-coupling and mode-dependent loss for core spacings ranging from 8 to 11 μm.

 

P.1.15 • First Design of High Birefringence and Polarising Hollow Core Anti-resonant Fibre

Seyedmohammad Abokhamis mousavi1, David J. Richardson1, Seyed Reza Sandoghchi1, Francesco Poletti1; 1University of southampton, southampton, United Kingdom

We thoroughly study possible ways to introduce high birefringence and differential loss in hollow core anti-resonant fibres. We present the design of realistically achievable fibres with large birefringence and effectively polarising behaviour over the entire C-band.

 

P.1.16 • Brillouin Random Lasing in Artifice Rayleigh Fiber

Andrei Fotiadi1, Sergei Popov2, Yurii Chamorovsky3, Patrice Mégret1, Igor Zolotovskii4; 1UMONS, Mons, Belgium, 2IRE, Moscow, Belgium, 3IRE, Moscow, Russia, 4UlSU, Ulyanovsk, Russia

We report on random lasing realized with 100-m-long Rayleigh fiber fabricated with multiple reflection centers inscribed in the fiber core and uniformly distributed over the fiber length. Extended fluctuation-free fragments in the oscilloscope traces highlight power statistics typical for lasing.

 

P.1.17 • Programmable Fibre-Optics Pulse Repetition Rate Multiplier for High-Speed Optical Communication Systems

Reza Maram1, Luis Romero Cortés1,  José Azaña1; 1INRS, University of Quebec, Montreal, Canada

A new, greatly simplified design is introduced for reconfigurable Talbot rate-multipliers, successfully demonstrating a programmable fiber-optics platform for generation of high-fidelity picosecond optical pulses with repetition-rates of 40, 80, 120, 160 and 200 GHz from a 10-GHz input mode-locked laser.

 

P.1.18 • Demonstration of Controllable Orbital Angular Momentum  (OAM) Beam Generation Using an All-Fiber System

Shuhui Li1, Qi  Mo2, Xiao Hu1, Jun Liu1, Long Zhu3, Yifan Zhao1, Jing Du3, Liang Fang1, Cheng Du2, Jian Wang3; 1Wuhan National Laboratory for Optoelectronics, Wuhan, China, 2Fiberhome Telecommunication Technologies Co. Ltd, Wuhan, China, 3Wuhan National Laboratory for Optoelectronics, wuhan, China

We propose a scheme to realize controllable, scalable, and versatile all-fiber orbital angular momentum (OAM) generator. By deforming a two-mode fiber (TMF) with mechanical devices, selective generation of LP11a, LP11b, OAM-1 and OAM+1 modes are demonstrated

 

P.1.19 • DMD Measurement of 114-SDM Transmission Fibre Using Low-Coherence Interferometry with Digital Holographic Processing

Yuta Wakayama1, Hidenori Taga1, Koji Igarashi2, Takehiro Tsuritani1; 1KDDI R&D Laboratories, Fujimino, Japan, 2Osaka University, Fujimino, Japan

We observe mode fields of a 6-mode 19-core fibre used in 114-SDM transmission experiment by digital holographic approach. Total DMDs are within 1.6–2.2 ns/km for all the cores as designed for the weakly-coupled few-mode multi-core fibre.

 

P2 • Waveguide and optoelectronic devices 

 

P.2.1 • Two-Port Multimode Interference Reflectors with Aluminium Mirrors in a Micron-Scale SOI Platform

Javier Fandiño1, José Doménech2, Pascual Muñoz1; 1ITEAM Research Institute, Valencia, Spain, 2VLC Photonics S.L., Valencia, Spain

Two-port multimode interference reflectors with different reflection coefficients are demonstrated in thick SOI. Measured devices feature reflectivities between 0% and 50% with worst-case peak-to-peak variations of ±12.5% over a 20 nm bandwidth (1540-1560 nm).

 

P.2.2 • High Performance Ion-Exchanged Integrated Waveguides in Thin Glass for Board-Level Multimode Optical Interconnects

Lars Brusberg1, Henning Schröder1, Christian Herbst2, Christopher Frey1, Christian Fiebig3, Aramais Zakharian4, Sergey Kuchinsky4, Xue Liu4, Davide Fortusini4, Alan Evans4; 1Fraunhofer IZM, Berlin, Germany, 2TU Berlin, Berlin, Germany, 3Corning Optical Communications GmbH & Co. KG, Berlin, Germany, 4Corning Inc., Corning, United States

We fabricated ion-exchanged graded-index optical waveguides in alkali-aluminosilicate glass showing excellent potential for optical backplane and electrical-optical circuit board applications. Motivation and process details are given and experimental results are discussed.

 

P.2.3 • Bias free operational 107-Gbaud ultra-fast photodetector

Toshimasa Umezawa1, Kouichi Akahane1, Naokatsu Yamamoto1, Atsushi Kanno1, Tetsuya Kawanishi2; 1National Institute of Information and Communications Technology, Tokyo, Japan, 2National Institute of Information and Communications Technology, Waseda University, Tokyo, Japan

We designed a high-baud-rate UTCphotodetector without a bias circuit. The photodetector’s wideband frequency response over 100 GHz and clear eye diagrams up to 107 Gbaud were confirmed. Bit error rate was discussed for 56 Gbaud and 107 Gbaud.

 

P.2.4 • Dual Mode Injection Locking of a Fabry-Pérot Laser for Tunable Broadband Gain Switched Comb Generation

Maria Deseada Gutierrez Pascual1, Rui  Zhou1, Frank  Smyth2, Tong Shao1, Prince Anandarajah11, Liam Barry1; 1Dublin City University, Dublin, Ireland, 2Pilot Photonics, Dublin, Ireland

We propose a simple technique to generate free-spectral range and wavelength tunable broadband combs by gain-switching and simultaneously injection locking two Fabry-Pérot longitudinal modes. The highly coherent comb source exhibits a 6dB bandwidth of 325GHz and wavelength tunability over 40nm.

 

P.2.5 • Demonstration of PLC-based six-mode multiplexer for mode division multiplexing transmission

Nobutomo Hanzawa1, Kunimasa Saitoh2, Taiji Sakamoto1, Takashi Matsui1, Kyozo Tsujikawa1, Takeshi Fujisawa2, Yuhei Ishizaka2, Fumihiko Yamamoto1; 1NTT, Tsukuba, Japan, 2Hokkaido University, Sapporo, Japan

We demonstrated a six-spatial-mode multiplexer using effective index matching andadiabatic mode transition.

Six-mode multiplexing including the equal effective indices of LP21b andLP02 was successfully achieved with a fabricated PLC on one chip.

 

P.2.6 • Photonic Integrated Spot Couplers Based on Vertical Mirrors for Mode Division Multiplexing

Haoshuo Chen1, Beatriz Barcones Campo2, Nicolas K.  Fontaine1, Roland  Ryf1, Kevin  Williams3, Ton  Koonen2; 1Bell Laboratories, Holmdel, United States, 2Eindhoven University of Technology, Eindhoven, Netherlands, 3Eindhoven University of Technology, Eindhoven , Netherlands

2-dimensional top-coupling by employing 45o vertical mirrors based on total internal reflection is proposed. 3-spot and 6-spot InP-based spot couplers using the proposed 45o mirrors as vertical emitters are fabricated and characterized.

 

P.2.7 • On-chip Optical Pulse Shaping based on Discrete Space-to-Time Mapping in Concatenated Co-Directional Couplers

Hamed Pishvai Bazargani1, Maurizio Burla1, Jose Azana1

1Institut national de la recherche scientifique, Montreal, Canada

We introduce a simple and practical design approach for on-chip optical pulse shaping based on concatenated co-directional couplers, and demonstrate synthesis of high-quality flat-top and phase-coded pulse trains with (sub-)picosecond resolutions in a SOI platform.

 

P.2.8 • 16-channel digitally wavelength-tunable hybrid III-V/silicon laser

Guilhem  de Valicourt1, Po Dong1, Kwangwoong KIM1, chia-ming chang1, Jeffrey Sinsky1, Larry Buhl1, young-kai chen2; 1Bell Labs, Alcatel-Lucent, Holmdel, United States, 2Bell Labs, Alcatel-Lucent, Murray Hill, United States

A novel 16-channel digitally wavelength-tunable laser is proposed and experimentally demonstrated using a semiconductor optical amplifier and silicon photonic integrated circuit. The device exhibits a laser threshold below 45 mA, SMSR around 20-25 dB and nanosecond switching time.

 

P.2.9 • Strictly Non-Blocking 8x8 Silicon Photonic Switch Based on Optical Phased Array

Takuo Tanemura1, Lennart Langouche2, Yoshiaki Nakano1; 1University of Tokyo, Tokyo, Japan, 2KU Leuven, Leuven, Belgium

Compact strictly non-blocking 8x8 silicon photonic switch based on optical phased array is designed and fabricated. Broadband (1530-1560 nm) switching with on-chip loss of 9.8 dB and response time below 25 μs is demonstrated experimentally.

 

P.2.10 • First Demonstration of Ge Waveguide Platform on Ge-on-Insulator for Mid-Infrared Integrated Photonics

Jian Kang1, Mitsuru Takenaka1, Shinichi Takagi1; 1The University of Tokyo, Tokyo, Japan

We demonstrate the proof-of-concept of Ge mid-infrared integrated photonics on Ge-on-insulator (GOI) wafer. Ge rib waveguides enable sharp bend at 2-μm wavelength band. The intensity modulation based on free-carrier absorption in Ge is also demonstrated by carrier injection.

 

P.2.11 • Photonic Chip Broadband Frequency Comb for Coherent Telecommunication

Victor Brasch1, Michael Geiselmann1, Tobias Herr1, Grigoriy Lihachev2, Martin H. P.  Pfeiffer1, Michael L. Gorodetsky2, Tobias Kippenberg1; 1Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, 2M.V. Lomonosov Moscow State University, Moscow, Russia

We demonstrate coherent frequency combs via soliton generation and dispersive-wave emission spanning over 75 THz, covering all telecommunication bands with customizable channel spacing. They are generated on a 5x5mm2 Silicon Nitride photonic chip and represent an ideal coherent telecommunication source.

 

P.2.12 • 4×4 Silicon Non-blocking Electro-optic Switches Based on Double-ring Assisted Mach-Zehnder Interferometers

Liangjun Lu1, Linjie Zhou1, Zuxiang Li1, Dong Li1, Shuoyi Zhao1, Xinwan Li1, Jianping Chen1; 1State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, School of Electronic Information and Electrical Engineering (SEIEE), Shanghai Jiao Tong University, Shanghai, China

We demonstrate a 4×4 silicon switch using double-ring assisted Mach-Zehnder interferometers. The maximum electro-optic switching power consumption is 1.38 mW, with phase correction power consumption 22.37 mW. The on-chip insertion loss is < 5.8 dB and crosstalk < -18 dB.

 

P.2.13 • Impact of process variability of active ring resonators in a 300mm silicon photonic platform

Le Maitre Patrick1, Carpentier Jean-Francois 1, Baudot Charles1, Vulliet Nathalie1, Souhaité Aurélie1, Quélène Jean-Baptiste1, Ferrotti Thomas 1, Bœuf Frederic 1; 1STMicroelectronics, Crolles, France

We study the process variability impact of silicon ring modulators on resonance wavelength, which is a key parameter to design WDM communication systems based on those devices.

 

P.2.14 • Flip-Chip Bonding of VCSELs to Silicon Grating Couplers via SU8 Prisms Fabricated using Laser Ablation

Kamal Kaur1, Ananth Subramanian2, Rik Verplancke1, Paolo Cardile1, Joris Van Kerrebrouck3, Silivia Spiga4, Ralf Meyer4, Johan  Bauwelinck 3, Roel  Baets2, Geert Van Steenberge11 imec/Ghent University, Gent, Belgium, 2Ghent University-imec, Gent, Belgium, 3Ghent University-iMinds-imec, Gent, Belgium, 4Technische Universität München, Munich, Germany

We successfully demonstrate for the first time, VCSEL-to-silicon grating coupler flip-chip assembly using SU8 prism fabricated by non-uniform laser ablation. Excess loss of < 1 dB and data transmission up to 20 Gb/s @ 1550 nm was achieved.

 

P.2.15 • Mode-evolutional Serial Branching 4-mode Multi/demultiplexer for Homogeneous Coupled Multi-core Fiber

Tatsuhiko Watanabe1, Yasuo Kokubun11;1Yokohama National University, Yokohama, Japan

Mode-evolutional serial branching mode multi/demultiplexer for homogeneous coupled multicorefiber was demonstrated. Owing to the mode-evolutional principle, low cross-talk of less than -15dBand small wavelength dependence were realized within the CL-band.

 

P.2.16 • A Performance Comparison of Single-Ended- and Differential Driving Scheme at 64 Gbit/s QPSK Modulation for InP-Based IQ-Mach-Zehnder Modulators in Serial-Push-Pull Configuration

Marko Rausch1, Norman Wolf11, Lei Yan1, Karl-Otto Velthaus1, Detlef Hoffmann1, Marko Gruner2, Martin Schell1; 1Fraunhofer Institute for Telecommunications, HHI, Berlin, Germany, 2Fraunhofer Institute for Telecommunications, Berlin, Germany

We show the positive impact of differential driving on the optical QPSK signal performance.For the first time, an EVM of <6% at 32 GBd QPSK has been achieved for a low power InP-IQMdesign, enabling small form factor transmitters.

 

P.2.17 • Silicon 2x2 Optical Switch Based on Optimized Multimode Interference Coupler to Minimize Power Consumption

Alvaro Rosa1, Amadeu Griol1, Ana Maria Gutierrez1, Antoine  Brimont1, Pablo Sanchis1

1Universitat Politècnica de València, Valencia, Spain

Optical switches based on multimode interference (MMI) couplers can reduce footprint and increase tolerance against fabrication deviations. Furthermore, a 50% power consumption reduction has been demonstrated by designing a trenched MMI for thermal isolation without penalizing insertion losses and crosstalk

 

P.2.18 • Demonstration of Few Mode Fiber Transmission Link Seeded by a Silicon Photonic Integrated Optical Vortex Emitter

Jun Liu1, Shimao Li2, Long Zhu1, Charalambos Klitis3, Yueyang Chen2, Andong Wang1, Shuhui Li1, Yun Long1, Shuang Zheng1, Shi Chen1, Marc Sorel3 , Cheng Du4, Qi Mo4, Siyuan Yu2, Xinlun Cai2, Jian Wang1

1Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China., Wuhan, China, 2State Key Laboratory of Optoelectronic Materials and Technologies, 3 School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, UK, 4 Fiberhome Telecommunication Technologies Co. Ltd, Wuhan, China

We experimentally demonstrate a chip to few mode fibre (FMF) transmission link with on-off-keying (OOK) signal. The device emits TM01 and TE01 vortex modes which propagate through a 1.1 km FMF with measured OSNR penalties less than 2 dB at a BER of 2e-3.

 

P.2.19 • Differential Optical Ring Modulator:  Breaking the Bandwidth/Quality-factor Trade-off

Saman Saeedi Saeedi1, Behrooz Abiri2, Ali Hajimiri2, Azita Emami2; 1California Institute of Technology, Pasadena, United States, 2California Institute of Technology, pasadena, United States

We present a differential ring modulator that breaks the optical bandwidth/quality factor trade-off known to limit the speed of high-Q ring modulators. This structure maintains a constant energy in the ring to avoid pattern-dependent power droop.

 

P.2.20 • High-Efficiency Folded Shallow-Grating Coupler with Minimal Back Reflection toward Isolator-Free Optical Integration

Masatoshi Tokushima1, Jun Ushida1, Toshinori Uemura1, Kazuhiko Kurata1

1PETRA, Tsukuba, Japan

Back reflection from grating couplers can be an obstacle to integrate them with isolator-free light sources. A folded shallow-grating coupler is proposed. We numerically confirmed a back reflection of -27 dB while achieving an upward emitting efficiency of -0.58 dB.

 

P.2.21 • Silicon-photonic PTAT Temperature Sensor  for Micro-ring Resonator Thermal Stabilization

Saman Saeedi1, Azita Emami2

1California Institute of Technology, pasadena, United States, 2California Institute of Technology, Pasadena, United States

This paper presents thermal stabilization of micro-ring resonator modulators through direct measurement of ring temperature using a monolithic PTAT temperature sensor. The measured temperature is used in a feedback loop to adjust the thermal tuner of the ring.

 

P.2.22 • 25-Gbps Error-Free Transmission over SMF and OM3 MMF Using Silicon Photonics Transmitter and CMOS Receiver

Yuki Wakayama1, Tadashi Okumura1, Misuzu Sagawa11, Yasunobu Matsuoka11, Hideo Arimoto1, Yoshinori Sunaga2; 1Hitachi, Ltd., Tokyo, Japan, 2Hitachi, Ltd., Hitachi, Japan

We demonstrated 1310-nm 25-Gbps error-free transmission over both 2-km single-mode fibre and 100-m OM3 multi-mode fiber using the same silicon photonics transmitter and a high-sensitivity CMOS receiver with a lens-integrated photodiode.

 

P.2.23 • Over 30 GHz Modulation of 850 nm Transverse Coupled Cavity Vertical-Cavity Surface-Emitting Laser

Xiaodong Gu1, Masanori Nakahama1, Akihiro Matsutani1, Fumio Koyama1: 1Tokyo Institute of Technology, Yokohama, Japan

An 850 nm-band transverse coupled cavity VCSEL is demonstrated for enhancing the modulation bandwidth thanks to strong optical feedback. A record modulation bandwidth of over 30GHz is demonstrated even by overcompensating the detector bandwidth limit.

 

P.2.24 • Silicon Photonics Interconnect Based on Ultra-small Scalable Components for Multi-channel Optical Transceivers

Rhee Hanjo1, Al-Saadi Aws1, Kupijai Sebastian1, Theiss Christoph1, Otte Sven1, Eichler Hans J.1, Woggon Ulrike1, Tillack Bernd1, Zimmermann Lars2, Richter Harald3, Lischke Stefan2, Mai Christian3, Stolarek David3, Meister Stefan; 1Technische Universität Berlin, Berlin, Germany, 2 IHP, Frankfurt (Oder), Germany, 3IHP, Frankfurt (Oder), Germany

A silicon photonics based fiber interconnect is presented including an integrated node-matched-diode modulator and Ge-photo detector. Due to very small footprints, a single channel 25 Gb/s non-return-to-zero data rate corresponds to a photonic bandwidth density of about 0.5 Tb/(s·mm2).

 

P.2.25 • Passive Ψ-Type Optical Polarization Splitter for Integrated Photonic Polarization Diversity Receivers
Vitaly Rymanov1, Besher Khani1, Sebastian Dülme1, Andreas Stöhr1, 1University of Duisburg-Essen, Duisburg, Germany
Here, we report on a completely passive InGaAsP/InP-based Ψ-type optical polarization splitter (as part of an integrated 1.55 μm photonic polarization diversity receiver), which exhibits splitting ratios up to 14.1 dB and 22.3 dB for TE- and TM-polarized lights, respectively.

 

 

 

  P3 • Digital and optical signal processing

 

P.3.1 • Fast Decoding and LLR-computation Algorithms for High-order Set-partitioned 4D-QAM Constellations

Shota Ishimura1, Kazuro Kikuchi1

1University of Tokyo, Tokyo, Japan

We propose digital-signal-processing algorithms that achieve fast decoding and LLR-computation for high-order set-partitioned 4D-QAM formats based on their parity-check functions. Computer-simulation results show that computational complexity of the decoder can significantly be reduced with negligible power penalty using such algorithms.

 

P.3.2 • Clock-recovery and Adaptive-equalization Characteristics of Digital Coherent Receivers with Symbol-rate Analog-to-digital Conversion

Kazuro Kikuchi1; 1University of Tokyo, Tokyo, Japan

We analyze the performance of digital coherent receivers with symbol-rate analog-to-digital conversion (ADC), aiming at short/medium-reach applications. Efficient dispersion compensation can be done even under the aliasing effect associated with ADC, when the clock is extracted by our proposed method.

 

P.3.3 • Digital Frequency Offset Compensation in High-speed Optical Intersatellite Data Transmission Systems

Semjon Schaefer1, Mark Gregory2, Werner Rosenkranz1; 1University of Kiel, Kiel, Germany, 2TESAT-Spacecom, Backnang, Germany

We present an alternative approach for current homodyne detection systems in optical intersatellite links. Our approach is based on digital frequency offset compensation instead of optical phase-locked loop techniques, in order to achieve a more flexible coherent detection scheme.

 

P.3.4 • Mitigation of Equalization Enhanced Phase Noise in Weakly Coupled FMF Transmission by Receiver Side Duo-binary Shaping and MLSD

Junpeng Liang1; 1Huazhong University of Sci&Tech (HUST), Wuhan, China

We investigate EEPN effect on the transmission of 336Gbit/s MDM-QPSK of FMFs supporting 6 spatial and polarization modes. A receiver side duo-binary shaping and MLSD is employed to enhance the performance of a system impaired by EEPN.

 

P.3.5 • Spectral Compression of Complex-Modulated Signals Without Loss of Information by Joint Temporal-Spectral Self-Imaging

Luis Romero Cortés1, Reza Maram1, José Azaña1; 1Institut National de la Recherche Scientifique, Montreal, Canada

We propose and demonstrate a new concept for spectral compression of return-to-zero data streams, based on completely reversible, linear processes, that liberates bandwidth (> 25% of the original signal bandwidth in the reported proof-of-concept experiments) without any loss of information.

 

P.3.6 • Software-defined RF-Photonics Processor: Concept and design equations

Daniel Pérez1, Ivana Gasulla1, José Capmany1; 1Universitat Politecnica de Valencia, Valencia, Spain

We propose and develop an end-to-end model of a software-defined RF-Photonics signal processor architecture that can be integrated on a chip and is capable of performing all the main functionalities by suitable programming of its electronic control signals.

 

P.3.7 • Multiflow regeneration using network coding for bidirectional links

Layec Patricia1, Dorize Christian1, Bigo Sébastien1; 1Alcatel-Lucent Bell Labs France, Paris, France

We propose to implement bit-level network coding with novel multiflow regenerators in bidirectional links. Our regenerators are designed to send two different messages out of a single transmitter. Simulations show an estimated ~20% equipment cost reduction at same performance.

 

P.3.8 • A simple all-optical format transparent time and wavelength demultiplexing technique for WDM & Orthogonal-TDM Nyquist channels

Mohammad Amin Shoaie1, Armand Vedadi1, Camille-Sophie Brès1: 1EPFL, Lausanne, Switzerland

A novel and simple non-coherent method to demultiplex WDM and orthogonal TDM Nyquist signal is presented. Using intensity modulators and filter, demultiplexing from a 3x8x10 = 240 Gb/s signal down to 10 Gb/s is demonstrated.

 

P.3.9 • Experimental Demonstration of Independent Component Analysis Based Channel Equalization in Multiband Coherent Optical PDM-OFDM

Xiang Li1, Wende Zhong1, Arokiaswami  Alphones1, Changyuan Yu2, Rong Hu3, Qi Yang3; 1Nanyang Technological University, Singapore, China, 2National University of Singapore, Singapore, China, 3State Key Laboratory of Optical Comm. Technologies and Networks, Wuhan, China

We propose an independent component analysis (ICA) based channel equalizer (CE) in multiband PDM-CO-OFDM. Compared with the conventional CE, the ICA-based CE achieves better transmission performances and higher spectral efficiency.

 

P.3.10 • Energy-Efficient Soft-Decision LDPC FEC For Long-Haul Optical Communication

Kevin Cushon1, Per Larsson-Edefors1, Peter Andrekson1; 1Chalmers University of Technology, Gothenburg, Sweden

We present forward error correction systems based on a low-complexity LDPC decoding algorithm and randomly-structured LDPC codes. Simulation and ASIC synthesis results show throughput and net coding gain

sufficient for long-haul applications, with greatly reduced energy consumption.

 

P.3.11 • Compact and Tunable AWG-based True Time Delays for Multi-Gbps  Radio Beamformer

Netsanet  Tessema1, Fulong Yan1, Zizheng Cao1, Eduward Tangdiongga1, A.M.J. Koonen1; 1Eindhoven University of Technology, Eindhoven, Netherlands

We designed, fabricated and tested a compact AWG-based true-time delay chip for optically-assisted radio beamforming. Beam steering is performed remotely by only tuning the laser wavelength. We demonstrated beamforming of a 2.5-Gbps, 10 GHz signal with 2.7o/nm discrete-step beam steering.

 

P.3.12 • Transmission of Intensity Modulation-Direct Detection Signals Far Beyond the Dispersion Limit Enabled by Phase-Retrieval

Gernot Goeger1, Cristian Prodaniuc1, Yabin Ye1, Qiang Zhang1; 1Huawei Technologies Duesseldorf GmbH, Munich, Germany

We propose a novel method to compensate for chromatic dispersion induced intersymbol interference in high baud-rate intensity-modulated direct-detection systems. A standard 40Gbit/s non-return-to-zero on-off keying channel is successfully recovered after 90km of standard single-mode fibre

 

P.3.13 • PSA-based all-optical multi-channel phase regenerator

Francesca Parmigiani1, Kyle R. H. Bottrill1, Radan Slavík1, David J. Richardson1, Periklis Petropoulos1; 1University of Southampton, Southampton, United Kingdom

We demonstrate simultaneous phase regeneration of six NRZ BPSK signals in a single nonlinear medium using FWM-based phase sensitive amplification. BER measurements confirm OSNR improvement and negligible cross-talk across all the regenerated channels, impaired with broadband phase noise.

 

P.3.14 • Efficient Frequency-Domain Fractionally-Spaced Equalizer for Flexible Digital Coherent Optical Receivers

Fabio Pittala1, Josef Nossek2; 1European Research Center, Huawei Technologies Duesseldorf GmbH, Munich, Germany, 2Institute for Circuit Theory and Signal Processing, Technische Universitaet Muenchen, Munich, Germany

Training-aided frequency-domain equalization for coherent receivers based on digital-signal-processing with oversampling factor below 2 samples-per-symbol (sps) is reported. The proposed architecture shows no performance degradation by reducing the oversampling factor from 2 to 1.25 sps.

 

P.3.15 • Dividing and Multiplying the Mode Order for Orbital-Angular-Momentum Beams

Zhe Zhao1, Yongxiong Ren11, Guodong Xie1, Long Li1, Yan Yan1, Nisar Ahmed1, Zhe Wang1, Nima  Ashrafi2, Solyman  Ashrafi3, Roger Linquist3, Alan Willner1; 1University of Southern California, Los Angeles, United States, 2University of Texas at Dallas & NxGen Partners, Dallas, United States, 3NxGen Partners, Dallas, United States

We demonstrate a new freedom to handle orbital-angular-momentum order. Using coordinate transformation we realize the bidirectional transformation between orders 2l (l=+5 to -5) and orders l. Mode purity and 2 OAM multiplexing system characteristics after division and multiplication are shown.

 

P.3.16 • Nonlinear Decision Boundary Created by a Machine Learning-based Classifier to Mitigate Nonlinear Phase Noise

Danshi Wang1, Min Zhang1, Ze Li1, Yue Cui1, Jingdan Liu1, Yang Yang1, Hongxiang Wang1; 1Beijing University of Posts and Telecommunications, Beijing, China

A machine learning-based classifier, namely SVM, is introduced to create the nonlinear decision boundary in M-ary PSK-based coherent optical system to mitigate NLPN. The maximum transmission distance and LPRD tolerance are improved by 480 km and 3.3 dBm for 8PSK.

 

P.3.17 • Reconfigurable Optical Inter-Channel Interference Compensation of 20/25-Gbaud QPSK Signals using Nonlinear Wave Mixing

Yinwen Cao1, Morteza Ziyadi1, Amirhossein Mohajerin Ariaei1, Ahmed Almaiman1, Peicheng Liao1, Changjing Bao1, Bishara Shamee1, Jeng-yuan Yang2, Youichi Akasaka2, Motoyoshi Sekiya2, Moshe Tur3, Carsten Langrock4, Martin Fejer4, J; 1University of Southern California, Los Angeles, United States, 2Fujitsu Laboratories of America, Richardson, United States, 3Tel Aviv University, Ramat Aviv, Israel, 4Stanford University, Stanford, United States, 5Information Sciences Institute

A reconfigurable optical inter-channel interference compensation method without channel spacing estimation and relative time delay calibration is proposed for a high density multi-carrier transmission system. Experiments demonstrate the effectiveness for both 20/25-Gbaud dual-carrier QPSK systems with different channel spacing conditions.

 

P.3.18 • Digital Signal Processing for Spectrally-Sliced Coherent Optical Receivers

Júlio C. M. Diniz1, Fábio D. Simões1, Valery N. Rozental1, Sandro M. Rossi1, Andrea Chiuchiarelli1, Juliano R. F. Oliveira1, Aldário C. Bordonalli2, Jacklyn D. Reis1; 1CPqD, Campinas, Brazil, 2UNICAMP, Campinas, Brazil

We propose and experimentally demonstrate a novel DSP concept in bandwidth-oriented coherent receivers for flexible optical communication systems. A 7000-km transparent reach is achieved for a 56?GBd?PM?QPSK single channel transmission using a pair of 40-GSa/s oscilloscopes with 16?GHz optical front-ends.

 

P.3.19 • Autonomous Receiver Architecture for Multi-Gigabit Photonic Assisted RF Signals

Pierre Isautier1, Jie Pan1, Stephen E. Ralph1; 1The Georgia Institute of Technology, Atlanta, GA, United States

We present a novel DSP architecture that identifies multi-gigabit photonic assisted RF signals with minimum prior knowledge of the received signal. Experimental investigation demonstrates successful identification of optically generated RF carriers modulated with 8Gbaud BPSK/QPSK/8-QAM/16-QAM, after V-band wireless transmission over 1m.

 

 


P4 • Subsystems for optical networking and for datacoms 

 

P.4.1 • Evaluation of Maximum Ratio Combining in Route Diversity Transmission and Application to Hitless Optical Path Switching in Field Installed Fibre

Kohei Saito1, Masahiro Yokota1, Fukutaro Hamaoka2, Shuto Yamamoto1, Takashi Kotanigawa1, Hideaki Maeda1, Akira Naka1

1NTT, Tokyo, Japan, 2NTT, Kanagawa, Japan

Hitless optical path switching using maximum ratio combining in route diversity transmission is successfully achieved under the condition of a field environment even if there are large polarization mode dispersion and fibre nonlinearities.

 

P.4.2 • Optical Spectrum Analysis with kHz Resolution Based on Polarization Pulling and Local Oscillator Assisted Brillouin Scattering

Stefan Preussler1, Hassanain Al-Taiy1, Thomas Schneider1; 1Technische Universität Braunschweig, Braunschweig, Germany

The high resolution spectroscopy of optical signals with a resolution of 30kHz, based onpolarization pulling assisted Brillouin scattering in combination with a narrow linewidth local oscillator,reveals the hidden details of a 500Mbps PRBS 29 -1 sequence.

 

P.4.3 • Demonstration of Optical Correlation Domain Reflectometry Based on Coherence Synchronization for Long-Range Measurement

Tatsuya Okamoto1, Daisuke Iida1, Kunihiro Toge1, Tetsuya Manabe1; 1NTT, Tsukuba, Japan

A novel optical correlation domain reflectometry technique utilizing artificially-generated low-coherence light is proposed for long-range measurement with high resolution. We successfully demonstrate the selection of one correlation peak of a laser at an arbitrary delay for a fibre under test.

 

P.4.4 • Predicting Insertion Loss in Multi-Fiber Multimode Connectors

Aramais Zakharian1, Esteban Marin2, Christian Fiebig3, Hieu Tran2, Lisa Hepburn1, Andrey Kobyakov2; 1Corning Inc., Corning, NY, United States, 2Corning Optical Communications, Hickory, NC, United States, 3Corning Optical Communications GmbH, Berlin, Germany

We develop a comprehensive opto-mechanical model to accurately predict insertion loss (IL) in multi-fiber multimode physical contact connectors and study the effect of various misalignment types and launch conditions. Monte Carlo simulations show good agreement with measured IL.

 

P.4.5 • Robust RZ to NRZ Format Converter Based on Linear Joint Temporal-Spectral Self-Imaging and Band-Pass Filtering

Luis Romero Cortés1, Reza Maram1, Lei Lei1, José Azaña1; 1Institut National de la Recherche Scientifique, Montreal, Canada

We propose and demonstrate a robust, linear RZ-to-NRZ conversion technique that operates without highly

constrained spectral line-suppressor filters. We experimentally achieve error-free RZ-to-NRZ data conversion at 10Gbps with frequency drifts in the signal carrier as large as a few GHz.

 

P.4.6 • Experimental Study of M-QAM Constellation Options for Short-Reach Dual-Polarization Optical OFDM with Direct Detection

Siamak Amiralizadeh1, Chul Soo Park1, Leslie A. Rusch1; 1Université Laval, Québec, Canada

We find optimized M-QAM constellations for short-reach DDO-OFDM using an iterative gradient-search method and evaluate their performance. With the optimized constellations, capacity is increased by 12 Gb/s compared to square constellation achieving data rate of 168 Gb/s for 16-QAM.

 

P.4.7 • Optical I/O Core Transmitter with High Tolerance to  Optical Feedback using Quantum Dot Laser

Kenji Mizutani1, Kenichiro Yashiki1, Mitsuru Kurihara1, Yasuyuki Suzuki1, Yasuhiko Hagihara1, Nobuaki Hatori1, Takanori Shimizu1, Yutaka Urino1, Takahiro Nakamura1, Kazuhiko Kurata1, Yasuhiko Arakawa2; 1PETRA, Tsukuba, Japan, 2The University of Tokyo, Tokyo, Japan

We discuss an isolator-free Si-photonics transmitter with a quantum-dot laser. A high tolerance to optical feedback of -30-dB against near-end reflections was successfully achieved. Furthermore, we also demonstrated the error-free operation of an optical I/O core at 25 Gbps.

 

P.4.8 • Low-Power Current-Equalised Optical Transmitter for Below-Threshold-Biasing VCSEL Operation

Jie Li1,Hungkei (Keith) Chow2, Ka-Lun Lee1, Kerry Hinton1; 1CEET, University of Melbourne, Melbourne, Australia, 2Bell Labs, Alcatel-Lucent, Murray Hill, NJ, United States 

A novel optical driver circuitry is proposed to improve the optical eye diagram for the VCSEL operating below the threshold current. The circuitry enables the operator to balance between the energy efficiency and optical signal quality.

 

P.4.9 • Transmission of 112Gbit/s Single Polarization Half-Cycle 16QAM Nyquist-SCM with 25Gbps EML and Direct Detection

Kangping Zhong1, Xian Zhou1, Yuliang Gao2, Yanfu Yang3, Wei Chen4, Jiangwei Man4, Li Zeng4, Alan Pak Tao Lau1, Chao Lu1; 1Photonics Research Center, The Hong Kong Polytechnic University, HONG KONG, China, 2Photonics Research Center, The Hong Kong Polytechnic University, Hong Kong, China, 3Department of EIE, Shenzhen Graduate School, Harbin Institute of Technology, SHE

A 112Gbit/s single polarization half-cycle 16QAM Nyquist-subcarrier-modulation signal was generated and transmitted over 10km employing 25Gbps EML and direct detection. This is the highest reported bit rate of direct detected half-cycle 16QAM Nyquist-SCM signal on single wavelength and single polarization.

 

P.4.10 • Experimental Performance Evaluation of Equalization Techniques  for 56 Gb/s PAM-4 VCSEL-based Optical Interconnects

Fotini Karinou1, Cristian  Prodaniuc1, Nebojsa Stojanovic1, Markus Ortsiefer2, Aidan Daly2, Robert Hohenleitner2, Benjamin Kögel2, Christian Neumeyr2; 1Huawei Technologies Duesseldorf GmbH, Munich, Germany, 2VERTILAS GmbH, Munich, Germany

The performance of two equalization techniques is experimentally compared using a 1530-nm VCSEL, 56Gb/s/λ PAM-4, and direct detection over 2 km links for datacenter interconnect applications. Results on the performance evaluation in terms of DSP implementation and complexity are presented.

 

P.4.11 • Impact of Differential Modal Delay on Intra-symbol Frequency Domain Averaging based CO-OFDM Channel Estimation

Xi Chen1; 1The University of Melbourne, Melbourne, Australia

We study the impact of differential modal delay (DMD) on inter-symbol frequency domain averaging (ISFA) based coherent optical OFDM channel estimation. We find the maximum ISFA window for a 78 ns DMD channel is 6 MHz.

 

P.4.12 • Sensitivity Improvements in an 850 nm VCSEL Transmitter using a One-tap Pre-emphasis Electronic Filter

Tamás Lengyel1, Krzysztof  Szsczerba1, Petter Westbergh1, Magnus  Karlsson1, Anders Larsson1, Peter  Andrekson1; 1Chalmers University of Technology, Göteborg, Sweden

We present ISI reduction of an 850nm VCSEL-based back-to-back optical link using a one-tap electronic pre-emphasis filter and compare it to a VCSEL link without filtering with similar launch conditions. Error floors are eliminated by the use of the filter.

 

P.4.13 • Optimum Detection in Presence of Nonlinear Distortions with Memory

Gabriele Liga1, Alex Alvarado1, Erik Agrell2, Marco Secondini3, Robert  Killey1, Polina Bayvel1; 1University College London, London, United Kingdom, 2Chalmers University of Technology, Gothenburg, Sweden, 3Scuola Superiore Sant’Anna, Pisa , Italy

The performance of nonlinearity-tailored detection for single channel, single span optical fibresystems is studied. Monotonically decreasing bit error rate with transmitted power can be achieved without any nonlinearity compensation.

 

P.4.14 • Demonstration of a Fine and Coarse Tunable Buffer for Multiple Discrete and Simultaneous Signal Access Using a Frequency Comb, Wavelength Conversion And Chromatic Dispersion

Ahmed Almaiman1, Amirhossein  Mohajerin-Ariaei1, Morteza Ziyadi1, Yinwen Cao1, Changjing  Bao1, peicheng liao11, Bishara Shamee1, Youichi Akasaka2, Jeng-yuan Yang2, Motoyoshi Sekiya2, Carsten Langrock3, Martin Fejer3, Loukas Parasch; 1University of southern california, los angeles, United States, 2Fujitsu Laboratories of America, Richardson, United States, 3Stanford University, Stanford, United States, 4Cisco, San Jose, United States, 5Tel Aviv University, Ramat Aviv , Israel

We experimentally demonstrate a tunable optical delay system that deploys dispersion, wavelength conversion in HNLF and multicasting in PPLN assisted with frequency comb lines pumping which offers discrete simultaneous access to the delayed signal.

 

P.4.15 • 112 Gbit/s Single-Polarization Silicon Coherent Receiver with Hybrid-Integrated BiCMOS Linear TIA

Jochem Verbist1, Jing Zhang1, Bart Moeneclaey1, John van Weerdenburg2, Roy van Uden2, Chigo Okonkwo2, Xin Yin1, Johan Bauwelinck1, Gunther Roelkens1; 1Ghent University, Gent, Belgium, 2Eindhoven University of Technology, Eindhoven, Netherlands

We report the design, fabrication and verification of a single-polarization silicon coherent receiver with a low-power linear TIA array. Error-free operation assuming FEC is shown at bitrates of 112 Gbit/s (28 Gbaud 16-QAM) and 56 Gbit/s (28 Gbaud QPSK).

 

P.4.16 • 100 Gbps Multi-format Optical Packet and Circuit Switching Node with Transparent Optical Switch and Burst-mode Amplifier

Hideaki Furukawa1, Jose Manuel Delgado Mendinueta1, Toru Segawa2, Ryo Takahashi2, Hiroaki Harai1, Satoshi Shinada1, Naoya Wada1; 1National Institute of Information and Communications Technology, Koganei, Japan, 2NTT Device Technology Laboratories, Atsugi, Japan

A newly multi-format OPS/OCS integrated node, having low polarization-dependent loss optical switches with nanosecond-order switching-speed and burst-mode amplifiers with low gain-fluctuation, is developed. For the first time we demonstrate error-free concurrent switching of 100 Gbps DP-QPSK/OOK optical packets and circuits.

 

P.4.17 • Compact Orbital Angular Momentum Mode Multiplexer/Demultiplexer based on a Michelson Interferometer with Porro Prisms

Paolo Martelli1, Pierpaolo Boffi1, Annalaura Fasiello1, Mario Martinelli1; 1Politecnico di Milano, Milano, Italy

A compact orbital angular momentum mode multiplexer/demultiplexer, exploiting the image rotation properties of two suitably oriented Porro prisms in a Michelson interferometer, is proposed. The effectiveness in mode demultiplexing of this passive device is experimentally proved for 20-Gbit/s two-mode transmission.

 

P.4.18 • Parallel Multi-Wavelength Intradyne Reception Using an Optical Frequency Comb as a Local Oscillator

Juned Nassir Kemal1, Joerg Pfeifle1, Pablo Marin1, Maria Deseada Gutierrez Pascual2, Frank Smyth2, Wolfgang Freude 1, Christian Koos1; 1Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany, 2Pilot Photonics Ltd, Dublin, Germany

We investigate super-channel intradyne reception using an optical frequency comb as local oscillator (LO). We synchronize its center frequency and free spectral range with the corresponding parameters of the transmitter comb to compensate environmental drifts during operation

 

 

P5 •  Point-to-Point transmission systems

 

P.5.1 • Spectrally-Efficient Single Sideband 16-QAM Nyquist-Subcarrier Modulation-Based WDM Transmission using an InP Dual-Drive Mach-Zehnder Modulator and Direct-Detection

Mustafa Sezer Erkilinc1, Stephan Pachnicke2, Helmut Griesser3, Benn C. Thomsen1, Polina Bayvel1, Robert I. Killey1; 1University College London, London, United Kingdom, 2ADVA, Meiningen, Germany, 3ADVA, Martinsried, Germany

We experimentally demonstrated 16 GHz-spaced 25 Gb/s per channel WDM transmission over 242 km of standard SMF at a net information spectral density of 1.46 b/s/Hz using SSB Nyquist-shaped subcarrier modulation generated with an InP dual-drive Mach-Zehnder modulator.

 

P.5.2 • Nonlinear Mitigation Technique Using Subcarrier Power Pre-emphasis and Digital Nonlinear Compensation in Superchannel Transmission

Tomohiro Yamauchi1, Olga Vassilieva2, Shoichiro Oda3, Inwoong Kim2, Chihiro Ohshima1, Hisao Nakashima3, Takeshi Hoshida3, Yasuhiko Aoki3, Motoyoshi Sekiya2, Yuichi Akiyama3, Jens C. Rasmussen1; 1Fujitsu Laboratories Ltd., Kawasaki, Japan, 2Fujitsu Laboratories of America, Inc., Richardson, United States, 3Fujitsu Limited, Kawasaki, Japan

We propose combined nonlinear mitigation technique for superchannel transmission. We experimentally demonstrate 3.1 dB performance improvement by optimizing subcarrier power pre-emphasis and applying digital nonlinear compensator with perturbation back-propagation algorithm for four-subcarrier DP-QPSK superchannel in 900 km dispersion-uncompensated transmission.

 

P.5.3 • Effective Signal to Noise Ratio Performance Metric for Dispersion-Uncompensated Links

Oleg Sinkin1, Carl Davidson1, Hongsheng  Wang1, Lee Richardson1, Jin-Xing Cai1, Dmitriy Kovsh1, Dmitri Foursa1, Bamdad Bakhshi1, Georg Mohs1, Alexei Pilipetskii1; 1TE Connectivity SubCom, Eatontown, United States

We propose a transponder-independent metric that can uniquely describe the performance of dispersion uncompensated links. Derived from OSNR and performance measurements using an available transponder, it can be used for performance prediction of any other transponder on the optical path.

 

P.5.4 • 100G SWDM4 Transmission over 300m Wideband MMF

Ilya Lyubomirsky1, Reza Motaghian1, Henry Daghighian1, Dave McMahon1, Stephen Nelson1, Chris Kocot1, Jim Tatum2, Frank Achten3, Pierre Sillard4, Denis Molin4, Adrian Amezcua-Correa4; 1Finisar Corp., Sunnyvale, United States, 2Finisar Corp., Allen, United States, 3Prysmian Group, Eindhoven, Netherlands, 4Prysmian Group, Billy Berclau, France

Experimental data is presented demonstrating 100GbE (4 x 25.8 Gb/s) SWDM4 VCSEL technology, and SWDM4 transmission over 200m and 300m of wideband OM4 fiber. All SWDM4 channels achieve error free transmission at 200m, and BER < 1.e-9 at 300m.

 

P.5.5 • Transmission of 8x128.8Gbaud Single-Carrier PDM-QPSK Signal over 2800km SMF-28 with EDFA-only

Jianjun Yu1, Junwen Zhang2, Zhensheng Jia2, XInying Li2, Hung Chang Chien2, Yi Cai2, Fan Li2, yuanquan Wang2, xin xiao3; 1ZTE Corp., Basking Ridge, United States, 2ZTE, Morristown, United States, 3ZTE, morristown, United States

We successfully transmitted 100GHz-grid, 8 channels single-carrier 515.2-Gb/s super-Nyquist signal over 2800-km SMF-28 with EDFA-only. In addition, record all-ETDM-based 136-Gbaud PDM-QPSK is generated and coherently detected.

 

P.5.6 • Linear Block-Coding across >5 Tb/s PDM-64QAM Spatial-Super-Channels in a 19-core Fiber

Benjamin Puttnam1, Ruben Luis1, Jose-Manuel Delgado-Mendinueta1, Yoshinari Awaji1, Naoya Wada1, Erik Agrell2; 1NICT, Tokyo, Japan, 2Chalmers University of Technology, Gothenburg, Sweden

We apply linear block-codes across 228-bit, PDM-64QAM spatial super-channels in a 19-core fiber and observe upto 3 dB reduced OSNR requirement and additional transmission reach of 55% at BER=3.8×10–3 and 122% at BER=1×10–3 for a 10.5% code overhead.

 

P.5.7 • Simplified Perturbation-based Approach for Predicting the Tolerance to Intra-channel Nonlinear Effects

Ahmed Abd El-Rahman1, Aazar Kashi1, John Cartledge1, Maurice O’Sullivan2, Charles Laperle2, Andrzej Borowiec2, Kim Roberts2; 1Queen’s University, Kingston, Canada, 2Ciena, Ottawa, Canada

A broadly applicable perturbation-based approach is demonstrated for estimating the impact of intra-channel fiber nonlinearities on system performance. The estimated performance for DP-QPSK, DP-8QAM, and DP-16QAM exhibits good agreement with both simulation and experimental results.

 

P.5.8 • Compensation of XPM Interference by Blind Tracking of the Nonlinear Phase in WDM Systems with QAM Input

Tobias Fehenberger1, Metodi P. Yankov2, Luca Barletta1, Norbert Hanik1; 1Technische Universität München, Munich, Germany, 2Technical University of Denmark, Kgs. Lyngby, Denmark

Exploiting temporal correlations in the phase, achievable rates are studied and a blind trellis-based receiver is presented. Gains of 0.5 bit per symbol are found in point-to-point links irrespective of the symbol rate. These gains disappear in network configurations.

 

P.5.9 • Mode Dependent Loss Equaliser and Impact of MDL on PDM-16QAM Few-mode Fibre Transmission

Takayuki Mizuno1, Hidehiko Takara1, Kohki Shibahara1, Yutaka Miyamoto1, Manabu Oguma2, Hirotaka Ono2, Yoshiteru Abe2, Takashi Matsui3, Shoichiro Matsuo4, Kunimasa Saitoh5, Yuki Kimura6; 1NTT Corporation, Yokosuka, Japan, 2NTT Corporation, Atsugi, Japan, 3NTT Corporation, Tsukuba, Japan, 4Fujikura Ltd., Sakura, Japan, 5Hokkaido University, Sapporo, Japan, 6Osaka Prefecture University, Sakai, Japan

We experimentally evaluate the relationship between mode dependent loss (MDL) and Q penalty for few-mode fibre transmission. We employ a low-MDL recirculating loop and free-space-optics type MDL equaliser and transmit 3-mode signals with PDM-16QAM modulation.

 

P.5.10 • Experimental Investigation of a 16-Dimensional Modulation Format for Long-Haul Multi-Core Fiber Transmission

Georg Rademacher1, Benjamin J. Puttnam1, Ruben S. Luis1, Yoshinari Awaji2, Naoya  Wada22, Erik Agrell3, Klaus Petermann4; 1National Institute of Information and Communications Technology, Tokyo, Germany, 2National Institute of Information and Communications Technology, Tokyo, Japan, 3Chalmers University of Technology, Gothenburg, Sweden, 4Technische Universität Berl

We experimentally investigate a 16-dimensional modulation format applicable to multi-core fiber transmission, and demonstrate over 14,000 km transmission for a BER of 1E-3, a 55 % improvement in reach compared to DP-BPSK for the same spectral efficiency.

 

P.5.11 • PAPR Management of All-Optical OFDM Signal using Fractional Fourier Transform for Fibre Nonlinearity Mitigation

Tomotaka Nagashima1, Gabriella Cincotti2, Takuya Murakawa11, Satoshi Shimizu3, Makoto Hasegawa1, Kuninori Hattori4, Masayuki Okuno4, Shinji Mino4, Akira Himeno4, Naoya Wada3, Hiroyuki Uenohara5, Tsuyoshi Konishi1; 1Osaka University, Osaka, Japan, 2University Roma Tre, Rome, Italy, 3NICT, Tokyo, Japan, 4NTT Electronics Co. Ltd., Ibaraki, Japan, 5Tokyo Institute of Technology, Yokohama, Japan

We propose a novel PAPR management technique using fractional Fourier transform subcarriers and time-lens effect. By deforming a high PAPR OFDM signal into a low PAPR Nyquist pulse train in fibre links, signal distortions by a fibre nonlinearity are mitigated.

 

P.5.12 • 30 Gbit/s Transmission over 1 km of Conventional Multi-mode Fiber using Mode Group Multiplexing with OOK modulation and direct detection

Guillaume Labroille1, Pu Jian1, Lionel Garcia1, Jean-Baptiste Trinel2, Redha Kassi3, Laurent Bigot2, Jean-François Morizur1; 1CAILabs SAS, Rennes, France, 2PhLAM/IRCICA, Villeneuve d’Ascq, France, 3IEMN/IRCICA, Villeneuve d’Ascq, France

We demonstrate a 3x10 Gbit/s transmission with BER below 10-11 over 1 km of conventional graded-index multi-mode fiber using OOK modulation and direct detection. Reach and capacity boosts areenabled by selective mode-group multiplexing based on Multi-Plane Light Converters in 3 full mode groups of an OM2 fiber.

 

P.5.13 • Real-time Adaptive 4-64 QAM, 20-60 Gbit/s Quantum Noise Stream Cipher Transmission over 320 km with FPGA-based Transmitter and Receiver

Masato Yoshida1, Toshihiko Hirooka1, Keisuke Kasai1, Masataka Nakazawa1; 1Tohoku University, Sendai, Japan

We demonstrate a real-time adaptive 4-64 QAM, 20-60 Gbit/s quantum noise stream cipher transmission over 320 km with an FPGA-based transmitter and receiver. The QAM data multiplicity can be randomly changed on-line, which increases the encryption security.

 

P.5.14 • Bit Rate-Distance Product Limits for Uncompensated Coherent Multi-Core Fiber Links under Total Power Constraint

Kasyapa Balemarthy1, Robert Lingle2; 1OFS, Hyderabad, India, 2OFS, Norcross, United States

We analyze the bit rate-distance (B-D) product limits for uncompensated coherent multi-core fiber links for the same total power. For practical modulation formats, the B-D product saturates to 1.5 times that of a single-core fiber with just 3-4 cores.

 

P.5.15 • Power Consumption of Hybrid EDFA/Raman Amplified Systems

Lars Lundberg1, Pontus Johannisson11, Erik Agrell1, Magnus Karlsson1, Peter Andrekson1; 1Chalmers University of Technology, Gothenburg, Sweden

We analyze the power consumption in hybrid EDFA/Raman amplified links along with the trade-off of span distance and the use of FEC. A simple model provides some guidelines for the choices to be made.

 

P.5.16 • Nonlinear phase and polarization rotation noise in fully loaded WDM systems

Ronen Dar1, Meir Feder2, Antonio Mecozzi3, Mark Shtaif2, Peter Winzer1; 1Bell Laboratories, Alcatel-Lecent, New Jersey, United States, 2Tel Aviv University, Tel Aviv, Israel, 3University of L’Aquila, L’Aquila, Italy

We show that nonlinear interference noise (NLIN) produced by faraway WDM channels is dominated by nonlinear phase-noise and polarization-rotations, whereas NLIN produced by nearest channels tends to be more circular. We discuss the impact of these results on nonlinear mitigation.

 

P.5.17 • Impact of Intra- and Inter-subcarrier Nonlinearities on the Information Rate of a 1.206 Tbit/s DP 16-QAM Superchannel

Ali Rezania1, Aazar Kashi1, John Cartledge1; 1Queen’s University, Kingston, Canada

For a 1.206 Tbit/s DP 16-QAM superchannel, the impact of the number of subcarriers on the intra- and

inter-subcarrier nonlinearities and on the maximum achievable transmission distance for an information rate of 1 Tbit/s is determined by simulation.

 

P.5.18 • Unrepeated 100 km SMF Transmission of 110.3 Gbps/lambda DMT signal

Ryo Okabe1, Bo Liu2, Masato Nishihara1, Toshiki Tanaka1, Lei Li2, Zhenning Tao2, Jens Rasmussen1; 1Fujitsu Limited, Kawasaki, Japan, 2Fujitsu R&D Center, Beijing, China

We experimentally demonstrate 110.3 Gbps/lambda DMT transmission over 100 km SMF without chromatic dispersion compensation. Transmission reach extension is achieved by suppression of power fading of chromatic dispersion and nonlinearities using combination of VSB and NLC.

 

P.5.19 • 112-Gb/s Duobinary 4-PAM Transmission over 200-m Multi-Mode Fibre

Tianjian Zuo1, Liang Zhang1, Enbo Zhou1, Gordon Ning Liu1, Xiaogeng Xu1; 1Huawei Technologies Co., Ltd., Shenzhen, China

We experimentally demonstrated an 850-nm VCSEL based 112-Gb/s short reach interconnection system with 200-m MMF transmission employing a duobinary 4-PAM format. The sensitivity of -4.8 dBm at the 6.7% overhead FEC limit (BER=4.2x10-4) was achieved.

 

P.5.20 • Upper Limits on Number of Cores for Multi-core SMFs over Trans-Oceanic Distances at 100Gbps

Kasyapa Balemarthy1, Robert Lingle2; 1OFS, Hyderabad, India, 2OFS, Norcross, United States

Using the GN model, we show that a maximum of 5-7 cores/fiber can be accommodated with 220μm cladding diameter for < 0.25dB Q degradation with 100Gbps PM-QPSK transmission over 6000-12000km reaches with bend radii of 50-200mm.

 

P.5.21 • Unrepeatered 447Gb/s Nyquist PDM-64QAM transmission over 160km SSMF with Backward Raman Amplification

Xin Lv1, Dan Wang1, Yixiao Zhu1, Kaiheng Zou1, Zhennan Zheng1, Fan Zhang1, Lixin Zhu1, Zhangyuan Chen1; 1Peking University, Beijing, China

We experimentally demonstrate Nyquist superchannel transmission of 447 Gb/s (8×55.97Gb/s) PDM-64QAM over single span of 160 km SSMF with backward Raman amplification. We achieve a record distance of unrepeatered transmission for the spectral efficiency (SE) as high as 8.95b/s/Hz.

 

 

 
P6 • Core metro and data center networks

 

P.6.1 • Optical TDM Fast Reroute Method for Bufferless Metro Ring Networks with Arbitrary Fiber Length

Kyota Hattori1, Masahiro Nakagawa1, Toshiya Matsuda1, Masaru Katayama1, Katsutoshi Koda1; 1NTT Corporation, musashino-shi,Tokyo, Japan

We propose an optical TDM fast reroute method for bufferless metro ring NWs to achieve high reliability and cost-effectiveness. Experimental results show the time to reroute and accuracy of timeslots were under 2 ms and 30 ns by local restoration.

 

P.6.2 • On the Worthiness of Flexible Grid in Elastic Optical Networks

Jaume Comellas1, Gabriel Junyent1; 1Universitat Politècnica de Catalunya, Barcelona, Spain

Elastic networks are accepted as the right solution to improve optical networks performance. This work discusses about flexible grid usage value, supported by extensive simulations. Elastic connections using fixed grid spectrum allocation can actually lead to better network performance.

 

P.6.3 • Zero-dispersion DWDM Transmission and Multi-carrier Aggregation for Beyond 10G Metro Network

Katsutoshi Koda1, Toshiya Matsuda1, Toru Homemoto1, Masaru Katayama1; 1NTT, Musashino-shi, Japan

We propose a cost-effective beyond-10G metro network architecture that extends the reach of optical interfaces on zero-dispersion DWDM transmission and reduces signal processing by multi-carrier aggregation. We verified its effectiveness in 4x10G signal transmission over 400 km by XFP modules.

 

P.6.4 • Manycast and Anycast Routing for Replica Placement in DataCenter Networks

Ajmal Muhammad1, Nina Skorin-Kapov2, Lena Wosinska31Linköping University, Linköping, Sweden, 2Santiago Dela Ribera, Murcia, Spain, 3Royal Institute of Technology KTH, Stockholm, Sweden

Inter-datacenter networks need to support datacenters communication with the end-users, as well as content replication and synchronization between datacenters. This paper presents an integrated routing and replica placement strategy for WDM inter-datacenter networks resulting in reduced overall network resource consumption.

 

P.6.5 • Impact of Fiber Types and Raman Pumping in Reconfigurable DWDM Transparent Optical Networks

Vittorio Curri1, Arsalan Ahmad1, Andrea Bianco1, Hussein Chouman1, Daniele De Tommaso1, Guido Marchetto1, Sarosh Tahir1; 1Politecnico di Torino, Torino, Italy

We study the impact of different fibers with moderate pumping hybrid amplification in transparent networks using elastic transponders based on pure (PMF) or hybrid (TDHMF) modulation formats. TDHMF always over performs PMF. Advantages vary with Raman pumping and fiber type.

 

P.6.6 • Enabling Traffic Optimized Topology Restruction with the Optical Switching based Small World Data Center Network

Dongxu Zhang1, Tingting Yang1, Hongxiang Guo1, Jian Wu1; 1Beijing University of Posts and Telecommunications, Beijing, China

Based on the OpenScale architecture, we proposed an SDN-assisted traffic adaptive topology restruction scheme by rearranging long-reach lightpaths on top of the subwavelength switching regular lattice network. Simulation results verified the good performance of the proposed scheme.

 

P.6.7 • Enhanced Inherent Survivability to Link Failures at Low Link Margin in a Flexgrid Optical Network

Abhijit Mitra1, Andrew Lord2, Subrat Kar3, Paul Wright2; 1BT Research Fellow, IIT Delhi, India, New Delhi, India, 2BT, Ipswich, United Kingdom, 3IIT Delhi, New Delhi, India

We investigate Elastic Optical Networks under fiber failures. In the low Link Margin regime, up to 43% of affected demands are accommodated in existing higher QAM lightpaths.

 

P.6.8 • Dynamic Bandwidth Protection in Optical Subwavelength Switched Ring Network

Masahiro Nakagawa1, Kyota Hattori1, Toshiya Matsuda1, Masaru Katayama1, Katsutoshi Koda1; 1NTT, Tokyo, Japan

We propose a cost-effective adaptive protection scheme appropriate for optical subwavelength switched bursty metro networks. Simulation results show that 1-digit improvement in required number of wavelengths and 70% reduction in active transceivers was achieved compared with traditional pre-planned protection scenarios.

 

P.6.9 • Ring-based All-Optical Datacenter Networks

Anna Fagertun1, Michael Berger1, Sarah Ruepp1, Valerija  Kamchevska11, Michael Galili1, Leif Oxenløwe 1, Lars  Dittmann1; 1DTU Fotonik, Kongens Lyngby, Denmark

Ring-based generic network architecture for all-optical datacenters is proposed, offering highly scalable interconnection network with reduced cabling complexity. Simulations show improved performance compared to all-optical fat-tree datacenter architecture with 40%-99% improved connection request blocking and 3%-17% improved resource utilization.

 

P.6.10 • Sub-Wavelength Granularity Add/Drop Experiment in an Integrated Packet/Circuit Hybrid Optical Network

Raimena Veisllari1, Steinar Bjornstad1, Jan Petter Braute1, Kurosh Bozorgebrahimi2, Haakon Bryhni1; 1Transpacket, Oslo, Norway, 2UNINETT, Trondheim, Norway

Add/drop with sub-wavelength granularity is demonstrated in an integrated hybrid optical network Ethernet test-bed. Ultra-low packet delay variation (PDV), 300ns peak, is achieved for high wavelength utilization of 88% using additional statistical multiplexing.

 

P.6.11 • Power Optimization in Nonlinear Flexible-Grid Optical Networks

Li Yan1, Juzi Zhao1, Henk Wymeersch1, Erik Agrell1; 1Chalmers University of Technology, Gothenburg, Sweden

The routing and spectrum assignment in nonlinear flexible-grid networks is extended by optimizing the power separately for each connection. This yields 24% bandwidth reduction for large networks. An Optimization formulation and decomposition strategy are proposed to solve the problem.

 

P.6.12 • Performance Improvements of Hybrid Opto-Electronic Packet Switch Using SDM in Addition to WDM

Samoud Wiem1, Lourdiane Mounia2, Ware Cédric1; 1Institut Mines-Télécom/ Télécom ParisTech, Paris, France, 2Institut Mines-Télécom/ Télécom SudParis, Evry, France

We investigate the performance improvements of a hybrid opto-electronic switch thanks to the interchangeability provided by the use of SDM in addition to WDM in the connected links.

 

P.6.13 • Impairment-aware Resource Allocation over Flexi-grid Network with All-Optical Add/Drop Capability

Ioannis Tomkos1, Pouria Sayyad Khodashenas1, José Manuel Rivas-Moscoso1, Dimitrios Klonidis1, Gilles Thouenon2, Christophe Betoule2; 1Athens Information Technology (AIT), Athens, Greece, 2Orange Labs, Lannion, France

An impairment-aware resource allocation algorithm for flexi-grid networks with all-optical add/drop capability is proposed. The performance of such a network is compared with legacy solutions. Results showed 15% spectrum saving and relative total transceiver cost reduction.

 

P.6.14 • Maximizing IP Fast Rerouting Coverage in Survivable IP-over-WDM Networks

Jose-Luis Izquierdo-Zaragoza1, Jose-Juan Pedreno-Manresa1, Pablo Pavon-Marino1; 1Universidad Politécnica de Cartagena, Cartagena, Spain

We show that IP-over-WDM multilayer networks can be designed to guarantee that a large majority of the traffic is restored at a subsecond timescale, using IP Fast Rerouting techniques. The rationale is enforcing OSPF/ECMP traffic balancing on SRG-disjoint lightpaths

 

P.6.15 • Traffic Engineering enforcement in multi-domain SDN orchestration of Multi-Layer (packet/optical) networks

Arturo Mayoral1, Ricard Vilalta1, Ramon Casellas1, Raul Muñoz1, Ricardo Martinez1; 1CTTC, Casteldefells, Spain

We introduce an SDN orchestration architecture to enable the introduction of E2E TE policies in a multi-domain, multi-layer network scenario. The ABNO is used as reference architecture for the SDN orchestration of packet/optical SDN controllers using Flow Service Classification.

 

P.6.16 • Engineering the First Open Source Implementation of the Multi-Layer Network Topology Databases

Mohit Chamania1, Fran Carpio2, Admela Jukan2; 1ADVA Optical Networking, Berlin, Germany, 2Technische Universitat Carolo-Wilhelmina zu Braunschweig, Braunschweig, Germany

We engineered the first open-source network topology database. The innovative use of aspect-oriented programming with ITU-TG.805 based topology constructs, makes the implementation generic, scalable and easy to integrate across vendor and technology barriers.

 

P.6.17 • Comparing Networks with Capacity-fixed and Spectrally-fixed Line Modules Implementing Multiple Coherent Modulations

Onur Turkcu1, Soumya Roy1, Abishek Gopalan1, Matt  Mitchell1, Biao Lu1; 1Infinera Corporation, Sunnyvale, United States

Capacity-fixed and spectrally-fixed implementations are two different line module solutions supporting multiple modulation formats. We compare both designs and show that a Capacity-fixed solution offers reduction in line module and chassis counts leading to lower network cost.

 

P.6.18 • Experimental Demonstration of Brokered Orchestration for end-to-end Service Provisioning and Interoperability across Heterogeneous Multi-Operator (Multi-AS) Optical Networks

Alberto Castro Casales1, Lluís Gifre2, Chen Cen3, Jie Yin3, Zuqing Zhu3, Luis Velasco2, S. J. Ben Yoo1; 1University of California, Davis, Davis, United States, 2Universitat Politècnica de Catalunya, Barcelona, Spain, 3University of Science and Technology of China, Hefei, China

A broker on top of opaquely-managed optical domains advertising their capabilities is proposed to provision multi-AS connections in multi-operator scenarios. In case of no spectrum continuity, intra-domain spectral defragmentation is performed. Experimental assessment was conducted on a distributed multi-continental infrastructure.

 

P.6.19 • Optical Resource Allocation for Dynamic Traffic in Mobile Core Networks Based on Software Defined Optical Networks

Zhendong Chen1; 1Beijing University of Posts and Telecommunication, Beijing, China

Driven by 5G communication, the mobile core network will be greatly challenged. In this paper, we propose a novel mobile core architecture based on SDON, then proposed a scheme to optimize the allocation of optical resource for mobile traffic.

 

 

P7 •  Access, local area and home networks

 

P.7.1 • Adaptive FEC control in downstream collaborating with Traffic control in OLT for WDM/TDM-PON

Jun Sugawa1, Koji Wakayama1, Hidehiro Toyoda1; 1Hitachi, Ltd., Yokohama-shi, Japan

We proposed adaptive FEC control that collaborates with downstream traffic control for passive optical networks. Successful operation of the adaptive FEC control in downstream based on downstream BERs of each ONU was demonstrated using a WDM/TDM-PON prototype.

 

P.7.2 • Demonstration of Multicast Video Streaming with N:1 Protection of a 10G-EPON System

Takashi Nishitani1, Yukio Hirano1, Hiroaki Mukai1; 1Mitsubishi Electric Corporation, Ofuna, Japan

Hitless protection is important for outage-free video streaming services. In this paper, we demonstrate multicast video streaming using a hitless 10G-EPON based N:1 protection scheme with a 2.5 Gbps (20 Mbps x 128 chs) downstream traffic load.

 

P.7.3 • Optical Path Protection with FEC Switching in WDM/TDM-PON for Ring Access Networks

Yuki Sakaue1, Kota Asaka1, Yumiko Senoo1, Shin Kaneko1, Tomoaki Yoshida1, Jun Sugawa2, Koji Wakayama2, Ken-Ichi Suzuki1, Akihiro Ootaka1; 1NTT Access Network Service Systems Laboratories, Yokosuka, Japan, 2Research & Development Group, Hitachi, Yokohama, Japan

We propose and demonstrate an optical path protection that offers FEC switching function for WDM/TDM-PON with ring topology. A system demonstration confirms proposed automatic wavelength and FEC switching enables a 30km difference of redundant optical path in ring access networks.

 

P.7.4 • Time-sharing Resources for Low Cost and High Performance Indoor Optical Wireless Networks

Chin Wan (Joanne) Oh1, Eduward  Tangdiongga1, Ton Koonen1; 1Eindhoven University of Technology, Eindhoven, Netherlands

Cost, performance and energy consumption are major issues in indoor optical wirelesssystems. We propose a low-cost, energy-friendly and yet high performance solution based on opticalbeam-steering and time-sharing. This solution also enables unicasting, multicasting and broadcastingof broadband services.

 

P.7.5 • Leveraging Gigabit broadband hybrid FTTH access via the integration of GPON and G.fast technologies

Jose Vicente Galan1, Enrique Masgrau1, Octavio Benedi1, Daniel Fraile1, Jorge Gaston1, David Beamonte1, Ilan Rozen2, Oren Mansour2, Rami Verbin2, Miguel Angel Pellon1, A. Cortes1; 1TELNET Redes Inteligentes, La Muela- Zaragoza, Spain, 2SCKIPIO Technologies, Tel-Aviv, Israel

Gigabit broadband hybrid FTTH access is demonstrated via GPON-G.fast integration. 500 Mbit/s layer 2 bit-rates are demonstrated with a novel 16-line GPON-G.fast system and copper loop lengths of 200 m. Higher bitrates were also achieved for shorter loop lengths.

 

P.7.6 • Up to 20-Gb/s Multilevel WDM PON Transmitter Based on Self seeded RSOAs

Paola Parolari1, Marco Brunero1, Romain Brenot2, Mario Martinelli1; 1Politecnico di Milano, Milano, Italy, 2III-V Lab, Marcoussis, France

We propose a novel colourless self-tuning WDM PON multilevel transmitter based on self-seeding in two RSOAs co-located at the ONU in a twofold retracing circuit. We demonstrate its operation up to 20 Gb/s with BER below the FEC limit.

 

P.7.7 • Analog Fiber-Optic Links Using High-Order Fiber Modes

Guifang Li1, He Wen2, Hongjun Zheng3, Qi Mo4, Amado Velázquez-Benítez1, Cen Xia1, Bin Huang1, Huiyuan Liu1, Huang Yu4, Jose Enrique Antonio Lopez1, Rodrigo Amezcua Correa1; 1University of Central Florida, Orlando, United States, 2Tianjin University, Tianjin, United States, 3Liaocheng University, Liaocheng, China, 4Wuhan Research Institute of Posts and Telecommunications, Wuhan, China

We demonstrate the first analog fiber-optic link using high-order modes in FMFs to improve SFDR and reduce WDM penalties due to fiber nonlinearities. An 8-dB SFDR improvement and a 15-dB nonlinear crosstalk suppression were achieved.

 

P.7.8 • High-Spectral Efficiency Millimeter-Wave over Fiber System for Future Mobile Fronthaul

Tien Dat Pham1, Atsushi Kanno1, Keizo Inagaki1, Naokatsu Yamamoto1, Testuya Kawanishi1; 1National Institute of Information and Communication Technology, Tokyo, Japan

We present a high-spectral efficiency fronthaul system for transmissions of millimeter-wave and multiple-input multiple-output (MIMO) signals in future mobile networks. Transmissions of an interband carrier aggregation and a 2 × 2 MIMO LTE-A signal over the system are successfully demonstrated.

 

P.7.9 • Accurate Wavelength Drift Measurements of NGPON2 Tunable Lasers Candidates

Gaël Simon1, Fabienne Saliou1, Philippe Chanclou1, Bertrand Le Guyader1, Laurent Guillo1, Didier Erasme2; 1Orange Labs, Lannion, France, 2Télécom ParisTech, Paris, France

We describe a heterodyne detection method able to measure precisely the wavelength drift of directly modulated lasers under burst mode operation. In addition to the thermal drift (up to 25GHz), the adiabatic chirp frequency modulation should not be neglected.

 

P.7.10 • Chip Integrated DFB-EAM for Directly Phase Modulation Performance Improvement in UDWDM-PON

Adolfo  Lerin1, Guang Yong Chu1, Victor Polo1, Iván Cano1, Josep Prat1; 1Universitat Politècnica de Catalunya, Barcelona, Spain

A chip integrated DFB-EAM is proposed as Tx with direct phase modulation and coherent detection. We achieved a 2dB performance enhancement in the Rx sensitivity by mitigating the residual IM produced in the optical PSK signal.

 

P.7.11 • New Concept for ONU amplified ODN and Demonstration of 80 Gbit/s TWDM-PON with 44 km Reach and 512 Split

Wolfgang Poehlmann11, Rene Bonk1, Harald Schmuck1, Thomas Pfeiffer1; 1Alcatel-Lucent Bell Labs, Stuttgart, Germany

We propose remote amplification by reusing optical amplifiers in the ONU as in-line amplifiers in a power line independent switched splitter and show that the budget can be substantially increased compared to an unamplified ODN

 

P.7.12 • Utilizing Unused Power Budget to Increase Network Capacity in Practical PON Deployments by Introducing Flexible Modulation

Robbert van der Linden1; 1Eindhoven University of Technology, Eindhoven, Netherlands

The actual use of power budgets in a PON typically varies widely. Utilizing 4-PAM modulation for ONUs that have high power margins can increase network capacity utilization without investing in expensive optics. We demonstrate that the capacity can increase 79%.

 

P.7.13 • Photon Ranging Techniques for Upstream Signalling  in TWDM-PON during ONU Activation

Roberto Gaudino1, Luca Bertignono2, Stefano Capriata3, Valter Ferrero1, Laura Greborio3, Roberto Mercinelli3, Maurizio Valvo3; 1Politecnico di Torino, Turin, Italy, 2Istituto Superiore, Turin, Italy, 3Telecom Italia, Turin, Italy

A low level, low frequency technique is proposed for initial upstream communication in a TWDM NG-PON2 system when the ONU transmitter is not sufficiently calibrated in wavelength and when synchronization of discovery windows among different channels is not possible.

 

P.7.14 • Multicore Optical-Wireless Extended-Range Fronthaul by Polarization-Multiplexing in Passive Optical Networks

Maria Morant1, Andrés Macho1, Josep Prat2, Roberto Llorente1; 1Universitat Politècnica de València, Valencia, Spain, 2Universitat Politècnica de Catalunya, Barcelona, Spain

Experimental demonstration of multiservice optical fronthaul provision in multicore fibre with extended range by polarization-multiplexed pasive networks. A 25.2 km PON with carrier-aggregated LTE/WiMAX radio-over-fibre transmission over two orthogonal polarizations provides fronthaul service after 150 m of 4-core fibre.

 

P.7.15 • 1003 (100Gb/s×100m×100GHz) Optical Wireless System

Xinying Li1, Jianjun  Yu1, Jiangnan  Xiao1

1Fudan University, Shanghai, China

1003 (100Gb/s×100m×~100GHz) high-speed optical wireless system at W-band has been demonstrated. Some enabling technologies and advanced devices, such as antenna polarization multiplexing, high-gain antennas and wideband optical/electrical components, are used to achieve this target.

 

P.7.16 • Cost Analysis of Coherent-based TRx PON Network

Albert Rafel1, Neil Parkin1; 1BT, Ipswich, United Kingdom

We analyse a simplified coherent design developed in the EU Project COCONUT for access networks and compare with standardised PON systems. A coherent ONU using dedicated wavelength at 1Gbit/s is predicted to be ~1.6 times the cost of a GPON-ONU.

 

P.7.17 • High Spectral Efficient and Flexible Multicarrier D-RoF Modem using up to 1024-QAM Modulation Format

Paulo Monteiro1, Sérgio Julião1, Reginaldo Nunes2, Diogo Viana1, Paulo Jesus3, Nelson Silva3, Arnaldo S. R. Oliveira1; 1Instituto de Telecomunicações, Aveiro, Portugal, 2Universidade Federal do Espírito Santo, Vitória, Portugal, 3P.T. Inovação, Aveiro, Portugal

We propose a flexible optical SCM modem to transmit, with high spectral efficiency, mobilefront-haul signals. The real time experimental results, demonstrate the multicarrier aggregation capacityof 3.6 Gbps based on four 1024-QAM D-RoF subcarriers and a 30km transmission reach.

 

P.7.18 • Multiple System Configuration for Next Generation Optical Access Networks with Real-Time Nyquist UDWDM-PON

Ali  Shahpari1, Ricardo Ferreira1, Somayeh Ziaie1, Zoran Vujicic1, Jacklyn Reis2, Juliano Rodrigues  Oliveira2, António Teixeira1; 1Instituto de Telecomunicações, Aveiro, Portugal, 2CPqD, Division of Optical Technologies, Campinas - SP, Brazil

We experimentally characterize 2.5-Gb/s bidirectional UDWDM based on Nyquist shaped QPSK with DSP in real-time. A 41 dB ODN is achieved over 80-km SSMF. Additionally, the required guard-bands for a coexisting scenario with TWDM and video overlay are evaluated.

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