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Chin. Opt. Lett.
 Home  List of Issues    Issue 05 , Vol. 03 , 2005    Optical coherent detection Brillouin distributed optical fiber sensor based on orthogonal polarization diversity reception


Optical coherent detection Brillouin distributed optical fiber sensor based on orthogonal polarization diversity reception
Muping Song, Bin Zhao, Xianmin Zhang
Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027

Chin. Opt. Lett., 2005, 03(05): pp.271-271-

DOI:
Topic:Instrumentation, measurement, and metrology
Keywords(OCIS Code): 060.2370  290.5830  260.5430  

Abstract
In Brillouin distributed optical fiber sensor, using optical coherent detection to detect Brillouin scattering optical signal is a good method, but there exists the polarization correlated detection problem. A novel detecting scheme is presented and demonstrated experimentally, which adopts orthogonal polarization diversity reception to resolve the polarization correlated detection problem. A laser is used as pump and reference light sources, a microwave electric-optical modulator (EOM) is adopted to produce frequency shift reference light, a polarization controller is used to control the polarization of the reference light which is changed into two orthogonal polarization for two adjacent acquisition periods. The Brillouin scattering light is coherently detected with the reference light, and the Brillouin scattering optical signal is taken out based on Brillouin frequency shift. After electronic processing, better Brillouin distributed sensing signal is obtained. A 25-km Brillouin distributed optical fiber sensor is achieved.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2005/1/6
Accepted:
Posted online:

Get Citation: Muping Song, Bin Zhao, Xianmin Zhang, "Optical coherent detection Brillouin distributed optical fiber sensor based on orthogonal polarization diversity reception," Chin. Opt. Lett. 03(05), 271-271-(2005)

Note: This work was supported by the Zhejiang Provincial Natural Science Foundation of China under Grant No. 603127. M. Song's e-mail address is songmp@zju.edu.cn.



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