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基于25G级光器件的50 Gbit/s NRZ IM-DD下行传输系统

50 Gbit/s NRZ IM-DD Downstream Transmission System Based on 25G-Class Optical Components
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摘要 4阶脉冲幅度调制信号对光电器件的线性度要求较高,色散容限较小;10G级光器件的带宽限制严重影响系统性能。描述了采用商用25G级光器件实现50 Gbit/s非归零码(NRZ)信号的传输实验方案。分别在背靠背和25 km标准单模光纤传输情况下,使用最大似然序列估计和基于最小均方误差算法的判决反馈均衡进行译码。通过比较不同接收光功率条件下的误码率性能,证明了基于25G级光器件的50 Gbit/s NRZ信号传输能够作为单路50 Gbit/s的候选方案。 The fourth-order pulse amplitude modulation signal requires high linearity and a small dispersion tolerance in an optoelectronic device. The bandwidth limitation of the 10 G-class optics device severely degrades system performance. This study describes a 50 Gbit/s non-return zero(NRZ) signal transmission scheme using commercial 25 G-class optical components. Herein, for a back-to-back and 25-km standard single-mode fiber transmission, the maximum likelihood sequence estimation and decision feedback equalization based on the least mean square algorithm are used for decoding. A comparison of the bit error rate performances under different received optical power conditions proves that the 50 Gbit/s NRZ signal transmission based on the 25 G-class optics device can act as a single-wavelength 50 Gbit/s candidate solution.
作者 陈炜 宋英雄 李正璇 李程程 陈健 李迎春 Chen Wei;Song Yingxiong;Li Zhengxuan;Li Chengcheng;Chen Jian;Li Yingchun(Shanghai Institute for Advanced Communication and Data Science,Shanghai 200444,China;Key Laboratory of Specialty Fiber Optics and Optical Access Networks f Shanghai University,Shanghai 200444,China)
出处 《光学学报》 EI CAS CSCD 北大核心 2019年第6期57-65,共9页 Acta Optica Sinica
基金 国家自然科学基金(61420106011,61601279, 61601277) 上海市科委资助(17010500400, 18511103400, 16511104100,16YF1403900).
关键词 光通信 定时恢复 信道估计 均衡 最大似然序列估计 判决反馈均衡 optical communications timing-recovery channel estimation equalizations maximum likelihood sequence estimation decision feedback equalization
作者简介 陈炜,E-mail: chenjian@shu.edu.cn;陈健,E-mail: davidchan@shu.edu.cn.
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