Research of Unrepeatered Transmission System based on Amplifier Optimization

WU Junyu; AO Xueyuan; DENG Lei; DAI Xiaoxiao; FU Songnian; LIU Chen; YANG Qi

doi:10.13756/j.gtxyj.2024.230003

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Research of Unrepeatered Transmission System based on Amplifier Optimization

更新时间：2024-08-05

- Research of Unrepeatered Transmission System based on Amplifier Optimization
- Study on Optical Communications Issue 4, Pages: 23000301-23000307(2024)
- 作者机构：
  
  1.华中科技大学　光电信息学院，武汉　430074
  2.深圳华中科技大学研究院，深圳　518000
  3.广东工业大学　信息工程学院，广州　510006
  4.广东省信息光子技术重点实验室，广州　510006
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2024.230003
  CLC： TN929
- Published：10 August 2024，
  
  Received：05 March 2024，
  
  Revised：09 April 2024，
- 稿件说明：
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吴俊宇，敖学渊，邓磊，等. 基于放大器优化的无中继通信系统研究[J]. 光通信研究，2024(4)：230003.

Wu J Y, Ao X Y, Deng L, et al. Research of Unrepeatered Transmission System based on Amplifier Optimization [J]. Study on Optical Communications, 2024(4)：230003.
吴俊宇，敖学渊，邓磊，等. 基于放大器优化的无中继通信系统研究[J]. 光通信研究，2024(4)：230003. DOI： 10.13756/j.gtxyj.2024.230003.

Wu J Y, Ao X Y, Deng L, et al. Research of Unrepeatered Transmission System based on Amplifier Optimization [J]. Study on Optical Communications, 2024(4)：230003. DOI： 10.13756/j.gtxyj.2024.230003.

摘要

【目的】

传统无中继通信系统中需要使用分布式拉曼泵浦放大器和遥泵放大器，而分布式拉曼泵浦放大器和遥泵放大器均需要使用高功率泵浦激光源，并且会提高无中继通信系统光学链路复杂度。针对这一问题，文章提出了使用高功率掺铒光纤放大器（EDFA）取代无中继通信系统中的前向分布式拉曼泵浦放大器的无中继通信系统架构。

【方法】

文章通过VPI仿真平台建模分析比较了所提无中继通信系统架构的传输性能并进行了实时无中继通信传输实验验证。

【结果】

仿真结果表明，使用高功率泵浦提高信号光入纤功率能够实现传统无中继通信系统中的前向拉曼泵浦放大增益效果，并且更适合配合波分复用（WDM）技术实现更高速率的无中继通信传输。通过实验还证实了采用仅使用EDFA泵浦放大结构的无中继通信系统能够实现500 km跨度距离10 Gbit/s速率下的单通道无中继通信传输，并且在结合WDM技术的情况下，能够实现4×10 Gbit/s速率、500 km光纤链路跨度下的通信传输。

【结论】

文章所提仅采用EDFA泵浦放大的无中继通信传输系统架构能够极大地简化传统无中继通信系统架构，且能够基于EDFA泵浦放大布置多通道WDM系统从而提升系统通信传输的信号速率，对未来无中继通信系统结构简化以及通信速率提升具有重要的实际意义。

Abstract

【Objective】

There is a problem that traditional unrepeatered transmission system need to use disturbed Raman amplifier and remote optical pump amplifier

while both of these two amplifiers need to use high power pump laser which will increase the complexity of fiber link in unrepeatered transmission system. In this paper

we propose a new structure of unrepeatered transmission system using Erbium Doped Optical Fiber Amplifier (EDFA) to replace the forward disturbed Raman amplifier.

【Methods】

We analyze and compare the performance of the proposed unrepeatered transmission system

and realize a real-time unrepeatered transmission experiment with the proposed structure.

【Results】

The results show that the gain effect of forward Raman pump in traditional unrepeatered communication system can be achieved by using high power amplifier to increase the signal launch power

and the new structure of unrepeatered transmission system is more suitable to achieve higher bitrate with the help of Wavelength Division Multiplexing (WDM) technology. We confirm the unrepeatered transmission system can achieve 500 km span distance at 10 Gbit/s bit rate in single channel communication transmission

and 500 km span distance at 4×10 Gbit/s bit rate in the WDM technology.

【Conclusion】

The proposed unrepeatered transmission system can simplify the traditional unrepeatered transmission system

and increase the bit rate by using multi-channel WDM system with EDFA. It has important practical significance to simplify the structure and improve the bit rate in future unrepeatered transmission system.

关键词

无中继通信实时通信VPI仿真光纤光学掺铒光纤放大器

Keywords

unrepeatered transmissionreal-time transmissionVPI simulationfiber opticsEDFA

references

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Bissessur H, Bousselet P, Mongardien D, et al. 4×100 Gb/s Unrepeatered Transmission over 462 km Using Coherent PDM-QPSK Format and Real-time Processing[C]//2011 European Conference and Exposition on Optical Communications. Geneva, Switzerland: IEEE, 2011: Tu.3.B.3.

Chang D, Patki P, Burtsev S, et al. 8× 120 Gb/s Transmission over 80.8 dB/480.4 km Unrepeatered Span[C]//2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC). San Francisco, CA, USA: IEEE, 2013: JTh2A.42.

Bissessur H, Bastide C, Etienne S, et al. 24 Tb/s Unrepeatered C-band Transmission of Real-time Processed 200 Gb/s PDM-16-QAM over 349 km[C]//2017 Optical Fiber Communications Conference and Exhibition (OFC). San Francisco, CA, USA: IEEE, 2017: Th4D.2.

Chang D I, Zak E, Pelouch W, et al. 100 G Unrepeatered Transmission over 626.8 km with a Span Loss in Excess of 100 dB[C]//Asia Communications and Photonics Conference 2015. Hong Kong, China: OSA, 2015: AM4A.2.

Onohara K, Sugihara T, Konishi Y, et al. Soft-decision-based Forward Error Correction for 100 Gb/s Transport Systems[J]. IEEE Journal of Selected Topics in Quantum Electronics, 2010, 16(5):1258-1267.

周华, 张锐, 葛旗伟, 等. 基于多/单比特切换机制的LDPC码两级WBF算法[J]. 光通信研究, 2022 (2):12-17.

Zhou H, Zhang R, Ge Q W, et al. Two-stage WBF Algorithm for LDPC Codes based on Multi-/single-bit Switching Mechanism[J]. Study on Optical Communications, 2022 (2):12-17.

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