Design of Rayleigh BOTDA System Combined with Balance Detector

SHANG Qiu-feng; LIU Wei; HU Yu-ting

doi:10.13756/j.gtxyj.2017.05.012

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Design of Rayleigh BOTDA System Combined with Balance Detector

- Design of Rayleigh BOTDA System Combined with Balance Detector
- Study on Optical communication Issue 5, Pages: 43-45(2017)
- 作者机构：
  
  华北电力大学电子与通信工程系
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2017.05.012
  CLC： TN25
- Published：2017，
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[1]尚秋峰,刘薇,胡雨婷.结合平衡检测器的瑞利BOTDA系统设计[J].光通信研究,2017(05):43-45+69.

SHANG Qiu-feng, LIU Wei, HU Yu-ting. Design of Rayleigh BOTDA System Combined with Balance Detector. [J]. (5):43-45(2017)
[1]尚秋峰,刘薇,胡雨婷.结合平衡检测器的瑞利BOTDA系统设计[J].光通信研究,2017(05):43-45+69. DOI： 10.13756/j.gtxyj.2017.05.012.

SHANG Qiu-feng, LIU Wei, HU Yu-ting. Design of Rayleigh BOTDA System Combined with Balance Detector. [J]. (5):43-45(2017) DOI： 10.13756/j.gtxyj.2017.05.012.

摘要

针对传统的基于瑞利散射的布里渊光时域分析系统存在信噪比低的问题

提出了一种新的基于瑞利散射的布里渊光时域分析设计方案。采用平衡检测技术

同时利用斯托克斯边带和反斯托克斯边带的信息

输出信号功率比单端检测提高了两倍。由于两个光电二极管输入信号的等噪声特性

使用平衡检测使噪声功率增加2

1/2

倍

输出信号的信噪比提高2

1/2

倍。对2.4km光纤进行实验

验证了系统的可行性

采用平衡检测技术后信号得到明显的改善。

Abstract

A novel Rayleigh Brillouin Optical Time Domain Analysis（RBOTDA）scheme is proposed to deal with the low Signal-to-Noise Ratio（SNR）issue in traditional RBOTDA system.The output power is increased by 2 times than single-ended detection based on balanced detection with Stokes sideband and anti-Stokes sideband information.Due to the noise characteristics of two photodiode input signals

the use of balanced detection increases the noise power by 2

1/2

and the SNR is also increased by 2

1/2

.The feasibility of the system is verified on 2.4 km optical fiber.It is shown that the signal is improved obviously by using the balanced detection technique.

关键词

瑞利散射布里渊光时域分析平衡检测信噪比

Keywords

Rayleigh scatteringBOTDAbalanced detectionsignal-to-noise ratio

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