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Digital domain power division multiplexed dual polarization coherent optical OFDM transmission

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arXiv 2017年

作者： Wu, Qiong Feng, Zhenhua Tang, Ming Li, Xiang Luo, Ming Zhou, Huibin Fu, Songnian Liu, Deming National Engineering Laboratory for Next Generation Internet Access System School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Optical Communication Technologies and Networks Wuhan Research Institute of Post and Telecommunication Wuhan Hubei430074 China

Capacity is the eternal pursuit for communication systems due to the overwhelming demand of bandwidth hungry applications. As the backbone infrastructure of modern communication networks, the optical fiber transmission system undergoes a significant capacity growth over decades by exploiting available physical dimensions (time, frequency, quadrature, polarization and space) of the optical carrier for multiplexing. For each dimension, stringent orthogonality must be guaranteed for perfect separation of independent multiplexed signals. To catch up with the ever-increasing capacity requirement, it is therefore interesting and important to develop new multiplexing methodologies relaxing the orthogonal constraint thus achieving better spectral efficiency and more flexibility of frequency reuse. Inspired by the idea of non-orthogonal multiple access (NOMA) scheme, here we propose a digital domain power division multiplexed (PDM) transmission technology which is fully compatible with current dual polarization (DP) coherent optical communication system. The coherent optical orthogonal frequency division multiplexing (CO-OFDM) modulation has been employed owing to its great superiority on high spectral efficiency, flexible coding, ease of channel estimation and robustness against fiber dispersion. And a PDM-DP-CO-OFDM has been theoretically and experimentally demonstrated with 100Gb/s wavelength division multiplexing (WDM) transmission over 1440km standard single mode fibers (SSMFs). Two baseband quadrature phase shift keying (QPSK) OFDM signals are overlaid together with different power levels. After IQ modulation, polarization multiplexing and long distance fiber transmission, the PDM-DP-CO-OFDM signal has been successfully recovered in the typical polarization diversity coherent receiver by successive interference cancellation (SIC) algorithm. Non-orthogonal overlaid signals different in power double the system spectral efficiency and it enables flexible provisioning of q

关键词： Orthogonal frequency division multiplexing

Ultra-compact and highly efficient polarization splitter and rotator based on a silicon bent directional coupler 42

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Ultra-compact and highly efficient polarization splitter and...

42nd European Conference on optical communication, ECOC 2016

作者： Zhang, Yong He, Yu Jiang, Xinhong Liu, Boyu Qiu, Ciyuan Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

An ultra-compact (coupling length ∼ 8.77 μm) silicon polarization splitter and rotator is demonstrated based on a bent directional coupler. The peak TM-TE coupling efficiency reaches 96.6%. The crosstalk values are ... 详细信息

ISBN: (纸本)9783800742745

关键词： Directional couplers

Compact silicon photonic interleaver using an interfering loop containing a fabry-perot cavity formed by sagnac loop mirrors 42

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Compact silicon photonic interleaver using an interfering lo...

42nd European Conference on optical communication, ECOC 2016

作者： Jiang, Xinhong Yang, Yuxing Liu, Boyu Zhang, Yong Qiu, Ciyuan Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

A compact (106.4 × 55.1 μm2) silicon photonic interleaver is proposed and experimentally demonstrated. The 3-dB and 20-dB bandwidths of the passband are ∼1.09 nm and ∼1.585 nm, respectively. The central wavele... 详细信息

ISBN: (纸本)9783800742745

关键词： Silicon photonics

288 Gb/s 850 nm VCSEL-based Interconnect over 100 m MMF based on Feature-enhanced Recurrent Neural Network

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288 Gb/s 850 nm VCSEL-based Interconnect over 100 m MMF base...

optical Fiber communication Conference, OFC 2016

作者： Gao, Yunfeng Yang, Chuanchuan Wang, Jiaxing Qin, Xin Guo, Haipeng Zhang, Xiaoyu Shen, Chih-Chiang Li, Hongbin Chen, Zhangyuan Chang-Hasnain, Constance J. State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronics Peking University Beijing100871 China Berxel Photonics Co. Ltd. Shenzhen518055 China

We experimentally demonstrate an ultra-high speed record of single-lane 288 Gb/s PAM-8 signal transmission over 100 m MMF attributed to the proposed design-optimized 850 nm VCSEL and feature-enhanced RNN equalization....

ISBN: (纸本)9781943580071

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FeynmanPAQS: A graphical interface program for photonic analog quantum computing

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arXiv 2018年

作者： Tang, Hao Zhu, Yan-Yan Gao, Jun Lee, Marcus Lai, Peng-Cheng Jin, Xian-Min State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Institute of Natural Sciences Shanghai Jiao Tong University Shanghai200240 China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei Anhui230026 China School of Physical Science University of Chinese Academy of Science Beijing100049 China Deparment of Physics Cambridge University CambridgeCB3 0HE United Kingdom

We present a user-friendly software for photonic analog quantum computing with an installable MATlab package and the graphical user interface (GUI) that allows for convenient operation without requiring programming skills. Arbitrary Hamiltonians can be set by either importing the waveguide position files or manually plotting the configuration on the interactive board of the GUI. Our software provides a powerful approach to theoretical studies of two-dimensional quantum walks, quantum stochastic walks, multi-particle quantum walks and boson sampling, which may all be feasibly implemented in the physical experimental system on photonic chips, and would inspire a rich diversity of applications for photonic quantum computing and quantum simulation. We have also improved algorithms to ensure the calculation efficiency of the software, and provided various panels and exporting formats to facilitate users for comprehensive analysis of their research issues with abundant theoretical results. Copyright © 2018, The Authors. All rights reserved.

关键词： Graphical user interfaces

Field-trial of a real-time 100 Gb/s twdm-pon based on 10G-class optical devices 42

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Field-trial of a real-time 100 Gb/s twdm-pon based on 10G-cl...

42nd European Conference on optical communication, ECOC 2016

作者： Yi, Lilin Ji, Honglin Li, Zhengxuan Li, Xiang Li, Cai Yang, Qi Xue, Lei Wang, Xiaodong Wang, Suyi Yang, Ying Xu, Junbo Yu, Shaohua Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China State Key Laboratory of Optical Communication Technologies and Networks Wuhan Research Institute of Posts and Telecommunications Wuhan Hubei430074 China Fiberhome Telecommunication Technologies Co. Ltd Wuhan430074 China

We show the first field trial of 100G-PON with downstream/upstream data rates of 25/10Gb/s/A based on 10G-class optical devices supporting 40-km reach and 33-dB loss budget. The system stability is verified by 67-hour... 详细信息

ISBN: (纸本)9783800742745

关键词： system stability

Ultrasensitive, high-dynamic-range and broadband strain sensing by time-of-flight detection with femtosecond-laser frequency combs

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arXiv 2017年

作者： Lu, Xing Zhang, Shuangyou Chen, Xing Kwon, Dohyeon Jeon, Chan-Gi Zhang, Zhigang Kim, Jungwon Shi, Kebin State Key Laboratory for Mesoscopic Physics Collaborative Innovation Center of Quantum Matter School of Physics Peking University Beijing100871 China Daejeon34141 Korea Republic of State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi030006 China

Ultrahigh-resolution optical strain sensors provide powerful tools in various scientific and engineering fields, ranging from long-baseline interferometers to civil and aerospace industries. Here we demonstrate an ultrahigh-resolution fibre strain sensing method by directly detecting the time-of-flight (TOF) change of the optical pulse train generated from a free-running passively mode-locked laser (MLL) frequency comb. We achieved a local strain resolution of 18 pΕ/Hz1/2 and 1.9 pΕ/Hz1/2 at 1 Hz and 3 kHz, respectively, with large dynamic range of >154 dB at 3 kHz. For remote-point sensing at 1-km distance, 80 pΕ/Hz1/2 (at 1 Hz) and 2.2 pΕ/Hz1/2 (at 3 kHz) resolution is demonstrated. While attaining both ultrahigh resolution and large dynamic range, the demonstrated method can be readily extended for multiple-point sensing as well by taking advantage of the broad optical comb spectra. These advantages may allow various applications of this sensor in geophysical science, structural health monitoring, and underwater science. Copyright © 2017, The Authors. All rights reserved.

关键词： Femtosecond lasers

Composable security of unidimensional continuous-variable quantum key distribution

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arXiv 2017年

作者： Liao, Qin Guo, Ying Xie, Cailang Huang, Duan Huang, Peng Zeng, Guihua School of Information Science Engineering Central South University Changsha410083 China State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Information Sensing and Processing Shanghai Jiao Tong University Shanghai200240 China

We investigate the composable security of unidimensional continuous variable quantum key distribution (UCVQKD), which is based on the Gaussian modulation of a single quadrature of the coherent-state of light, aiming to provide a simple implementation of key distribution compared to the symmetrically modulated Gaussian coherent-state protocols. This protocol neglects the necessity in one of the quadrature modulation in coherent-states and hence reduces the system complexity. To clarify the influence of finite-size effect and the cost of performance degeneration, we establish the relationship of the balanced parameters of the unmodulated quadrature and estimate the precise secure region. Subsequently, we illustrate the composable security of the UCVQKD protocol against collective attacks and achieve the tightest bound of the UCVQKD protocol. Numerical simulations show the asymptotic secret key rate of the UCVQKD protocol, together with the symmetrically modulated Gaussian coherent-state protocols. Copyright © 2017, The Authors. All rights reserved.

关键词： Modulation

Single-span IM/DD Transmission over 120-km SMF with a Silicon Photonic Mach-Zehnder Modulator and THP

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Single-span IM/DD Transmission over 120-km SMF with a Silico...

optical Fiber communication Conference, OFC 2016

作者： Li, Jingchi Wang, Zhen Li, Xingfeng Su, Yikai State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai200240 China

We experimentally demonstrate up to 120-km dispersion-uncompensated transmission in a SiP MZM-based IM/DD system. 28/42-Gbaud DSB PAM4 signal is transmitted over 80/120-km SMF enabled by Tomlinson-Harashima precoding ...

ISBN: (纸本)9781943580071

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