Multi-distributed probabilistically shaped PAM-4 system for intra-data-center networks  

作　　者：Mengli Liu Mingyi Gao Junchi Ke 刘梦丽;高明义;柯俊驰(Jiangsu Engineering Research Center of Novel Optical Fiber Technology and Communication Network,Suzhou Key Laboratory of Advanced Optical Communication Network Technology,School of Electronic and Information Engineering,Soochow University,Suzhou 215006,China)

机构地区：[1]Jiangsu Engineering Research Center of Novel Optical Fiber Technology and Communication Network,Suzhou Key Laboratory of Advanced Optical Communication Network Technology,School of Electronic and Information Engineering,Soochow University,Suzhou 215006,China

出　　处：《Chinese Optics Letters》2021年第11期32-37,共6页中国光学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.62075147).

摘　　要：Probabilistically shaped(PS) pulse amplitude modulation(PAM) is a promising technique for intra-data-center networks due to its superior performance, for which a low-complexity and cost-effective distributed matching method is critical. In this work, we propose an energy-level-assigned method to yield PS-PAM-4 signals with various bit rates based on variable probabilistic distributions. We experimentally demonstrate the proposed method in a 25 Gbaud PS-PAM-4 transmission over a bandwidth of approximately 10 GHz. Compared to a uniform PAM-4 system, the proposed multi-distributed PS-PAM-4 system approaches the hard decision threshold at a wide range of received optical power for different applications.

关 键 词：probabilistic shaping pulse amplitude modulation feed-forward equalizer 

分 类 号：TP308[自动化与计算机技术—计算机系统结构]