单光源3.2 Tbit/s 2 080 km实时相干传输试验
Single laser-based 3.2 Tbit/s PM-QPSK real-time coherent transmission over 2 080 km standard single mode fiber
相干探测 实时传输 100 Gbit/s光收发模块 偏振复用四相相移键控 coherent detection real-time transmission 100 Gbit/s transponder PM-QPSK
摘要
文章介绍了基于31.786 Gbaud/s 光收发模块实现的32×100 Gbit/s信号速率、2 080 km标准单模光纤的实时相干光传输试验, 信号采用PM-QPSK(偏振复用四相相移键控)调制格式。信号光源为单个激光器产生的32路波分复用子光载波, 频率间隔为32 GHz, 频谱效率达到3.11 bit/s/Hz。信号传输2 080 km后, 采用20%的FEC(前向纠错)编码时, Q值仍有1.2 dB的余量。此外, 还研究了光滤波器带宽与OSNR(光信噪比)代价的关系。25 h挂机试验结果显示, 信号接收纠错前误码率在1E-2以下, 表明该传输系统稳定可靠。该系统为国内首个单光源3.2 Tbit/s实时传输试验系统,对提升现有100 Gbit/s商用光纤传输系统的传输效率有较大的指导意义。
Abstract
This paper demonstrates a real-time coherent optical transmission test at a signal rate of 32×100 Gbit/s in the Polarization-Multiplexed Quadrature-Phase-Shift-Keying (PM-QPSK) modulation format over 2 080 km Standard Single Mode Fiber (SSMF) realized on the basis of a 31.786 Gbaud/s transponder. It generates 32 WDM channels from a single laser on a 32 GHz grid and yields a spectral efficiency of 3.11 b/s/Hz. When it employs 20% FEC limit (BER level of 2E-2) after 2 080 km transmission, the Q factor still has 1.2 dB margin. In addition, it investigates the relationship between filter bandwidth and OSNR penalties of 100 Gbit/s PM-QPSK signal. 25 h tested measurement shows that the system is stable and all the tested BERs are below 1E-2 at 1 550 nm WDM channel.
徐俊波, 张璋, 罗鸣, 黄博, 李超, 刘武, 李婕, 贺志学, 杨奇, 余少华. 单光源3.2 Tbit/s 2 080 km实时相干传输试验[J]. 光通信研究, 2015, 41(1): 1. Xu Junbo, Zhang Zhang, Luo Ming, Huang Bo, Li Chao, Liu Wu, Li Jie, He Zhixue, Yang Qi, Yu Shaohua. Single laser-based 3.2 Tbit/s PM-QPSK real-time coherent transmission over 2 080 km standard single mode fiber[J]. Study On Optical Communications, 2015, 41(1): 1.
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