Key Enabling Techniques and Deployment of 120Gb/s Long-Haul Optical Transmission in Backbone Networks  

骨干网中120Gb/s长距离光传输的关键技术与部署(英文)

作　　者：纪越峰 陈宇飞 陈雪 施社平 张民 夏焱 顾仁涛 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,School of Information and Communication Engineering,Beijing University of Posts and Telecommunications [2]ZTE Corporation

出　　处：《China Communications》2013年第8期158-163,共6页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No. 60932004;the National High Technical Research and Development Program of China (863 Program) under Grants No. 2012AA011301,No. 2012AA011303

摘　　要：The explosive increase in data traffic requires networks to provide higher capacity and long-haul transmission capabilities.This paper introduces new results on high-order modulation and efficient Digital Signal Processing algorithms to reduce various transmission limitations in coherent receiving systems.Polarization Division Multiplexed Quadrature Phase Shift Keying(PDM-QPSK)is deployed to reach high bit rates,provides modified digital clock recovery,and allows BER-Aided Constant Modulus Algorithm(BA-CMA)equalising.A Soft Decision-Forward Error Correction(SD-FEC)algorithm and a joint scheme with timing recovery and adaptive equaliser are used to achieve better performance.A compact coherent transceiver is also developed.These techniques have been applied in the largest 100 G Optical Transport Network(OTN)deployment in the world,the backbone expansion project for Phase 3 of the China Education and Research Network(CERNET),with a total transmission length of 10 000 km.The explosive increase in data traffic requires networks to provide higher capacity and long-haul transmission capabilities.This paper introduces new results on high-order modulation and efficient Digital Signal Processing algorithms to reduce various transmission limitations in coherent receiving systems.Polarization Division Multiplexed Quadrature Phase Shift Keying（PDM-QPSK）is deployed to reach high bit rates,provides modified digital clock recovery,and allows BER-Aided Constant Modulus Algorithm（BA-CMA）equalising.A Soft Decision-Forward Error Correction（SD-FEC）algorithm and a joint scheme with timing recovery and adaptive equaliser are used to achieve better performance.A compact coherent transceiver is also developed.These techniques have been applied in the largest 100 G Optical Transport Network（OTN）deployment in the world,the backbone expansion project for Phase 3 of the China Education and Research Network（CERNET）,with a total transmission length of 10 000 km.

关 键 词：optical transmission high-order modulation coherence detector coherent transceiver 

分 类 号：TN929.1[电子电信—通信与信息系统] TH16[电子电信—信息与通信工程]