光学学报, 2019, 39 (6): 0606003, 网络出版: 2019-06-17
基于25G级光器件的50 Gbit/s NRZ IM-DD下行传输系统 下载: 1216次
50 Gbit/s NRZ IM-DD Downstream Transmission System Based on 25G-Class Optical Components
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
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。
Abstract
The fourth-order pulse amplitude modulation signal requires high linearity and a small dispersion tolerance in an optoelectronic device. The bandwidth limitation of the 10G-class optics device severely degrades system performance. This study describes a 50 Gbit/s non-return zero (NRZ) signal transmission scheme using commercial 25G-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 25G-class optics device can act as a single-wavelength 50 Gbit/s candidate solution.
陈炜, 宋英雄, 李正璇, 李程程, 陈健, 李迎春. 基于25G级光器件的50 Gbit/s NRZ IM-DD下行传输系统[J]. 光学学报, 2019, 39(6): 0606003. Wei Chen, Yingxiong Song, Zhengxuan Li, Chengcheng Li, Jian Chen, Yingchun Li. 50 Gbit/s NRZ IM-DD Downstream Transmission System Based on 25G-Class Optical Components[J]. Acta Optica Sinica, 2019, 39(6): 0606003.