Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System

DUAN Ming-xiong; ZHU Jing; LU He; WU Guang-zhe; LI Wei-hua; HUANG Chao; LONG Han; WU Jian-jun

doi:10.13756/j.gtxyj.2021.03.008

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Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System

- Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System
- Study on Optical Communications Issue 3, Pages: 33-37(2021)
- 作者机构：
  
  1.武汉光迅科技股份有限公司，武汉　430205
  2.国家电网有限公司信息通信分公司，北京　100761
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.03.008
  CLC： TN256
- Published：10 June 2021，
  
  Received：06 November 2020，
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DUAN Ming-xiong, ZHU Jing, LU He, et al. Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System. [J]. Study on Optical Communications (3):33-37(2021)
DOI：

DUAN Ming-xiong, ZHU Jing, LU He, et al. Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System. [J]. Study on Optical Communications (3):33-37(2021) DOI： 10.13756/j.gtxyj.2021.03.008.

摘要

针对相干光纤通信系统中匹配滤波（如根升余弦滤波器）对系统的影响，文章在不同光学带宽、残余色散以及非线性情况下，对不同滚降因子

的系统特性进行了研究。文章分别仿真研究了256 Gbit/s偏振复用16阶正交幅度调制（PDM-16QAM）信号在光学带宽为33、50及100 GHz时的传输特性、残余色散在-300~300 ps/nm区间内的特性和注入功率为-3~4 dBm情况下传输1 200 km光纤链路的特性。仿真结果表明，对于光学带宽受限的系统，

选取（1+

）

（

为信号波特率）与系统光学带宽相近的值为宜；对于光学带宽接近两倍波特率的系统，滚降因子

选取0.2~0.5为宜。

Abstract

Aiming at the influence of matched filter (e.g.root raised cosine filter) on the coherent optical fiber communication system

the effect of roll-off factor (

) are studied under different value of optical bandwidth

residual dispersion and nonlinearity. Simulations are carried out for 256 Gbit/s Polarization Division Multiplexing-16 Quadrature Amplitude Modulation (PDM-16QAM) signals when the optical bandwidth are 33

50 and 100 GHz

the residual dispersion ranging from-300 to 300 ps/nm and launched power ranging from-3 to 4 dBm in a 1 200 km optical fiber link. The simulations show that a good transmission performance can be achieved for limited optical bandwidth system when

is set to the value of (1+

)

(

is the Baud rate of the signal) that similar to the system optical bandwidth. When optical bandwidth near or exceed 2 times Baud rate of signals

should be set between 0.2 and 0.5 to achieve a better transmission performance.

关键词

相干光通信匹配滤波根升余弦单模光纤

Keywords

coherent optical communicationsmatched filterroot raised cosinesingle mode fiber

references

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