Optical carrier regeneration based on injection locking for single-sideband self-coherent detection

被引:0
|
作者
Uo, S. iyu [1 ]
Li, Zhengxuan [1 ]
Ao, Bingyao [1 ]
Yi, Lilin [1 ,2 ]
Ong, Yingxiong [1 ]
机构
[1] Shanghai Univ, Key Lab Specialty Fiber Opt & Opt Access Networks, Joint Int Res Lab Specialty Fiber Opt & Adv Commun, Shanghai 200444, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
来源
OPTICS EXPRESS | 2024年 / 32卷 / 26期
关键词
TRANSMISSION; RECEIVER;
D O I
10.1364/OE.544516
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In this work, we demonstrate a low-cost electro-absorption modulated laser (EML)based coherent receiver enabled by the injection locking technique in a 32-Gb/s single-sideband (SSB) transmission system. We focus on analyzing the harmonic components introduced by injection locking process when injecting an SSB signal into the EML-based coherent receiver and compare them with the harmonic components introduced by the injection-locked laser (ILL)-based coherent receiver. To mitigate the nonlinear impairment caused by the harmonic components, we validate the feasibility of a neural network (NN)-based nonlinear equalizer. We also evaluate the performance of the EML-based coherent receiver in comparison to the ILL-based coherent receiver and the Kramers-Kronig (KK) receiver. The experimental results show that the EML-based coherent receiver can provide a 6.5-dB sensitivity improvement with a 14-dB CSPR reduction compared to the KK receiver after 40 km fiber transmission. If the EAM photodiode has higher responsivity, the proposed reception approach is expected to achieve comparable sensitivity to the ILL-based coherent receiver with lower hardware complexity. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码:46415 / 46427
页数:13
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