Research on Transmission Performance of CL Optical Fiber based on 400 Gbit/s C+L System

TAN Yexin; PENG Yang; WANG Junqi; CHEN Xi

doi:10.13756/j.gtxyj.2026.240135

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Research on Transmission Performance of CL Optical Fiber based on 400 Gbit/s C+L System

更新时间：2026-03-03

- Research on Transmission Performance of CL Optical Fiber based on 400 Gbit/s C+L System
- Study on Optical Communications Issue 1, (2026)
- 作者机构：
  
  1.烽火通信科技股份有限公司　网络产出线，武汉　 430205
  2.武汉邮电科学研究院，武汉　 430074
  3.武汉网锐检测科技有限公司，武汉　 430074
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2026.240135
  CLC： TN929
- Received：24 June 2024，
  
  Revised：2024-07-24，
  
  Published：10 February 2026
- 稿件说明：
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谭业欣，彭阳，汪俊奇，等. 基于400 Gbit/s C+L系统的CL光纤传输性能的研究[J]. 光通信研究，2026(1): 240135.

Tan Y X, Peng Y, Wang J Q, et al. Research on Transmission Performance of CL Optical Fiber based on 400 Gbit/s C+L System[J]. Study on Optical Communications, 2026(1): 240135.
谭业欣，彭阳，汪俊奇，等. 基于400 Gbit/s C+L系统的CL光纤传输性能的研究[J]. 光通信研究，2026(1): 240135. DOI： 10.13756/j.gtxyj.2026.240135.

Tan Y X, Peng Y, Wang J Q, et al. Research on Transmission Performance of CL Optical Fiber based on 400 Gbit/s C+L System[J]. Study on Optical Communications, 2026(1): 240135. DOI： 10.13756/j.gtxyj.2026.240135.

摘要

目的

在400 Gbit/s C+L系统中，受激拉曼散射效应（SRS）对传输信号的影响不可忽视，随着业务信号传输距离的增加，功率由短波向长波转移量随之累加。文章通过研究CL光纤的衰减系数和信号功率平坦度对系统末端光信噪比（OSNR）的影响，得到减小功率转移量的有效方案。

方法

衰减系数不同的A、B光纤在长度一样衰耗值不同和衰耗值相同长度不同的两种情况下得到功率谱结果并进行对比。

结果

当A、B光纤衰耗值不同时，光纤平均损耗小，末端OSNR更好；当A、B光纤衰耗值相同时，系统末端功率平坦度好，末端OSNR更好。

结论

在系统传输距离不变的情况下，减小光纤平均损耗可以提高OSNR；在系统衰耗不变的情况下，对末端功率调平，降低波道功率差。在1 550/1 625 nm衰减系数不变的情况下，C波段的衰减翘度小，系统传输性能更好。CL光纤衰减系数范围还能更精确。

Abstract

Objective

In the 400 Gbit/s C+L system

the impact of Stimulated Raman Scattering (SRS) on transmission signals cannot be ignored. As transmission distance increases

the signal power transferred from short wavelengths to long wavelengths accumulates. By investigating the impacts of fiber attenuation coefficient and signal power flatness on the Optical Signal-to-Noise Ratio (OSNR) at the system terminal

this paper proposes an effective scheme for reducing the power transfer amount.

Methods

The power experimental results of optical fiber A and B with different attenuation coefficients are obtained and compared in two cases.

Results

When the attenuation values of fibers A and B are inconsistent

the smaller the average fiber-optic loss

the better the terminal-system OSNR. When the line loss is consistent

the flatter the power spectrum

the better the terminal-system OSNR.

Conclusion

When the system transmission distance remains unchanged

reducing the average fiber-optic loss can improve the OSNR. When the system attenuation remains unchanged

adjusting the terminal-system power flatness can reduce the power differences. Without affecting the attenuation coefficient of 1 550/1 625 nm

the attenuation curl of the C-band can be reduced

resulting in better system transmission performance.

关键词

Keywords

references

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