BOTDR System Based on Self-Heterodyne Detection and Multi-Wavelength Source

LI Xiao-juan; LI Yong-qian; ZHANG Li-xin

doi:10.13756/j.gtxyj.2016.06.002

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BOTDR System Based on Self-Heterodyne Detection and Multi-Wavelength Source

- BOTDR System Based on Self-Heterodyne Detection and Multi-Wavelength Source
- Study on Optical communication Issue 6, Pages: 5-8(2016)
- 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.2016.06.002
  CLC： TN253
- Published：2016，
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[1]李晓娟,李永倩,张立欣.多波长自外差检测布里渊光时域反射系统[J].光通信研究,2016(06):5-8+29.

LI Xiao-juan, LI Yong-qian, ZHANG Li-xin. BOTDR System Based on Self-Heterodyne Detection and Multi-Wavelength Source. [J]. (6):5-8(2016)
[1]李晓娟,李永倩,张立欣.多波长自外差检测布里渊光时域反射系统[J].光通信研究,2016(06):5-8+29. DOI： 10.13756/j.gtxyj.2016.06.002.

LI Xiao-juan, LI Yong-qian, ZHANG Li-xin. BOTDR System Based on Self-Heterodyne Detection and Multi-Wavelength Source. [J]. (6):5-8(2016) DOI： 10.13756/j.gtxyj.2016.06.002.

摘要

为了减小相干瑞利噪声

提出了一种多波长瑞利和布里渊自外差检测布里渊光时域反射系统。分析了相位调制产生多波长探测光的机理及三波长系统的自外差检测原理;搭建单波长和三波长自外差检测布里渊光时域反射系统

获得了沿光纤的自外差信号功率和布里渊频移。实验结果表明

相对于单波长系统

三波长系统有效地减小了相干瑞利噪声引起的功率波动

信噪比提高近4.56dB;布里渊频移波动的均方根误差降低2.2 MHz。

Abstract

To reduce the coherent Rayleigh noise

a Brillouin Optical Time Domain Reflectometer（BOTDR）system based on self-heterodyne detection of Rayleigh and Brillouin scattering employing multi-wavelength source is proposed.The mechanism of multi-wavelength probe light generation by phase modulation and the principle of self-heterodyne detectionfor three-wavelength system are analyzed.A self-heterodyne detection BOTDR system employing single-wavelength and three-wavelength probe lights are constructed

and the self-heterodyne detection signal power and Brillouin frequency shift along the sensing fiber are obtained.The experiment results show that the power fluctuation generated by the coherent Rayleigh noise can be reduced effectively.The increment of signal-to-noise ratio is approximately to be 4.56 dB by employing three-wavelength probe light

and the root-mean-square error of Brillouin frequency shift fluctuation is reduced by 2.2 MHz when compared with that in the single-wavelength system.

关键词

光纤光学多波长探测光自外差检测布里渊频移功率

Keywords

fiber opticsmulti-wavelength probe lightself-heterodyne detectionBrillouin frequency shiftpower

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