Upstream dispersion management of 25 Gb/s duobinary and PAM-4 signals to support 0–40 km differential reach  

作　　者：计红林 义理林 薛雷 胡卫生 

机构地区：[1]State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Chinese Optics Letters》2017年第2期78-82,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant Nos. 61322507, 61132004, and 61575122

摘　　要：We extensively discuss 25 Gb/s per wavelength capacity in both IEEE and ITU-T standardization to support the increasing bandwidth requirement. In this Letter, we propose to use the optical dispersion compensation technique in an optical line terminal（OLT） combined with a bandwidth-limited electro-absorption modulated laser in an optical network unit to achieve 25 Gb/s capacity for the upstream link. We evaluate the positive and negative dispersion tolerances of 25 Gb/s electrical duo-binary（EDB） and pulse-amplitude modulation（PAM-4） signals. We achieve 39.5 and 31 d B upstream loss budgets for the 25 Gb/s EDB and PAM-4 signals by using-600 and-500 ps∕nm optical dispersion compensation in OLT, respectively, both supporting 0–40 km differential reach.We extensively discuss 25 Gb/s per wavelength capacity in both IEEE and ITU-T standardization to support the increasing bandwidth requirement. In this Letter, we propose to use the optical dispersion compensation technique in an optical line terminal（OLT） combined with a bandwidth-limited electro-absorption modulated laser in an optical network unit to achieve 25 Gb/s capacity for the upstream link. We evaluate the positive and negative dispersion tolerances of 25 Gb/s electrical duo-binary（EDB） and pulse-amplitude modulation（PAM-4） signals. We achieve 39.5 and 31 d B upstream loss budgets for the 25 Gb/s EDB and PAM-4 signals by using-600 and-500 ps∕nm optical dispersion compensation in OLT, respectively, both supporting 0–40 km differential reach.

关 键 词：BANDWIDTH Budget control Dense wavelength division multiplexing Dispersion (waves) Dispersion compensation 

分 类 号：TN929.1[电子电信—通信与信息系统]