PMD tolerant transmission using multiple optical phase conjugators in the discretely amplified systems

Q3 Engineering

Journal of Optical Communications Pub Date : 2023-10-09 DOI:10.1515/joc-2023-0250

Xiaogang Tong, Weiwei Cao, Junsheng Zhang, Haijian Liang

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Abstract

Abstract In this paper, the impact of polarization mode dispersion (PMD) on system performance in coherent optical transmission assisted by optical phase conjugation (OPC) technique is numerically investigated for a 9-channel PM-4QAM system at 128Gbit/s. The OPC-aided transmission, amplified with lumped erbium doped fiber amplifier (EDFA), is a variation of the conventional dispersion-managed link, which is also called dispersion-inverted link. We demonstrate that introducing more OPCs along the link can partly suppress the PMD-induced impairments and thus improve the system performance significantly. Results of 960-km dispersion-managed transmission show that PMD effect will cause a performance penalty of 1.8 dB when using mid-link OPC (i.e., only 1-OPC), while this penalty will decrease to about 0.4 dB when employing 6-OPCs along the link. Comparing with conventional digital back-propagation (DBP) technique, a performance improvement of about 3.1 dB is observed with multi-OPCs when fiber PMD is equal to 0.1ps/ k m $\sqrt{km}$ .

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离散放大系统中使用多光相位共轭器的耐PMD传输

摘要本文以128Gbit/s速率的9通道PM-4QAM系统为研究对象，研究了偏振模色散(PMD)对光学相位共轭(OPC)技术辅助下相干光传输系统性能的影响。opc辅助传输采用集总掺铒光纤放大器(EDFA)进行放大，是传统色散管理链路的一种变体，也称为色散反向链路。我们证明，在链路上引入更多的opc可以部分抑制pmd引起的损伤，从而显着提高系统性能。960公里色散管理传输的结果表明，当使用中间链路OPC(即仅使用1-OPC)时，PMD效应将导致1.8 dB的性能损失，而当沿链路使用6-OPC时，这种损失将减少到约0.4 dB。与传统的数字反向传播(DBP)技术相比，当光纤PMD = 0.1ps/ km $\sqrt{km}$时，多opcs的性能提高了约3.1 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Optical Communications Engineering-Electrical and Electronic Engineering

CiteScore

2.90

自引率

0.00%

发文量

期刊介绍： This is the journal for all scientists working in optical communications. Journal of Optical Communications was the first international publication covering all fields of optical communications with guided waves. It is the aim of the journal to serve all scientists engaged in optical communications as a comprehensive journal tailored to their needs and as a forum for their publications. The journal focuses on the main fields in optical communications