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Optical Engineering

Optical frequency domain reflectometry based single-mode fiber-optic distributed temperature sensor using synchronous polarization scrambling technique
Author(s): Ke Chen; Xinlei Zhou; Wei Peng; Qingxu Yu
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Paper Abstract

In order to reduce the polarization-induced impact on the incoherent optical frequency domain reflectometry based single-mode fiber-optic distributed temperature sensor, a synchronous polarization scrambling technique with a low-speed electrically driven polarization controller (EPC) is presented. The polarization-induced error is derived by error analysis. By simulating the distribution of the states of polarization on the Poincare sphere, optimized EPC driven parameters are selected. The polarization scrambling process is synchronous with the frequency response measurement of the Raman backscattered light. Additionally, the scrambling period is set to be equal to the measurement time of each frequency response. Experimental results show that the polarization-induced error is ∼±3°C, and it is basically in accord with the result of a theoretical error analysis. By using the synchronous polarization scrambling technique, the polarization-induced fluctuation of the measured temperature distribution has been almost eliminated.

Paper Details

Date Published: 1 March 2015
PDF: 6 pages
Opt. Eng. 54(3) 037104 doi: 10.1117/1.OE.54.3.037104
Published in: Optical Engineering Volume 54, Issue 3
Show Author Affiliations
Ke Chen, Dalian Univ. of Technology (China)
Xinlei Zhou, Dalian Univ. of Technology (China)
Wei Peng, Dalian Univ. of Technology (China)
Qingxu Yu, Dalian Univ. of Technology (China)

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