Performance optimization of OADM based DP-QPSK DWDM optical network with 37.5 GHz channel spacing

IF 1.9 4区计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS

Optical Switching and Networking Pub Date : 2021-05-01 DOI:10.1016/j.osn.2021.100606

Neeraj Sharma , Sunil Agrawal , Vinod Kapoor

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引用次数: 5

Abstract

Advanced modulation formats like dual-polarization quadrature phase-shift keying (DP-QPSK) along with the digital coherent receiver are enabling optical networks to provide high spectral efficiency (SE) over long-haul transmission reach. The DP-QPSK based dense wavelength division multiplexing (DWDM) system with 37.5 GHz channel spacing can provide extra throughput of 33% compared to 50 GHz channel spacing. However, at 37.5 GHz channel spacing, optical add-drop multiplexers (OADMs) at intermediate nodes, impact the performance of WDM based optical networks in terms of increased BER, thereby reducing transmission reach drastically. In this paper, we have analyzed with the help of numerical simulations, the performance of a differentially encoded eight-channel 112 Gb/s, OADM based DWDM optical network with a channel spacing of 37.5 GHz. We propose that the selection of optimum values of system parameters can result in reducing the impact of crosstalk propagation and narrowband optical filtering introduced by a chain of OADMs at 37.5 GHz channel spacing. The paper exhibited that the selection of optimum values of parameters like filter order of multiplexer and demultiplexer, launch power per channel and filter taps of adaptive equalizer (AE) result in achieving minimum BER on all the channels over a long transmission reach up to 3600 km.

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37.5 GHz信道间隔下基于OADM的DP-QPSK DWDM光网络性能优化

先进的调制格式，如双偏振正交相移键控(DP-QPSK)以及数字相干接收器，使光网络能够在长距离传输范围内提供高频谱效率(SE)。与50 GHz信道间隔相比，基于DP-QPSK的37.5 GHz信道间隔密集波分复用(DWDM)系统可提供33%的额外吞吐量。然而，在37.5 GHz信道间隔下，中间节点的光加降多路复用器(oadm)会影响基于WDM的光网络的性能，因为它会增加误码率，从而大大降低传输距离。本文通过数值仿真分析了信道间隔为37.5 GHz的差分编码8通道112gb /s、基于OADM的DWDM光网络的性能。我们提出，选择最优的系统参数值可以减少串扰传播的影响，以及在37.5 GHz信道间隔下由oadm链引入的窄带光滤波。通过对多路复用器和解路复用器滤波器阶数、单通道发射功率和自适应均衡器滤波器分插等参数的优化选择，可以实现3600 km长距离传输中所有信道的最小误码率。

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

Optical Switching and Networking COMPUTER SCIENCE, INFORMATION SYSTEMS-OPTICS

CiteScore

5.20

自引率

18.20%

发文量

审稿时长

77 days

期刊介绍： Optical Switching and Networking (OSN) is an archival journal aiming to provide complete coverage of all topics of interest to those involved in the optical and high-speed opto-electronic networking areas. The editorial board is committed to providing detailed, constructive feedback to submitted papers, as well as a fast turn-around time. Optical Switching and Networking considers high-quality, original, and unpublished contributions addressing all aspects of optical and opto-electronic networks. Specific areas of interest include, but are not limited to: • Optical and Opto-Electronic Backbone, Metropolitan and Local Area Networks • Optical Data Center Networks • Elastic optical networks • Green Optical Networks • Software Defined Optical Networks • Novel Multi-layer Architectures and Protocols (Ethernet, Internet, Physical Layer) • Optical Networks for Interet of Things (IOT) • Home Networks, In-Vehicle Networks, and Other Short-Reach Networks • Optical Access Networks • Optical Data Center Interconnection Systems • Optical OFDM and coherent optical network systems • Free Space Optics (FSO) networks • Hybrid Fiber - Wireless Networks • Optical Satellite Networks • Visible Light Communication Networks • Optical Storage Networks • Optical Network Security • Optical Network Resiliance and Reliability • Control Plane Issues and Signaling Protocols • Optical Quality of Service (OQoS) and Impairment Monitoring • Optical Layer Anycast, Broadcast and Multicast • Optical Network Applications, Testbeds and Experimental Networks • Optical Network for Science and High Performance Computing Networks