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Proceedings Paper

Suppression of polarization sensitivity in BOTDA fiber distributed sensing system
Author(s): Jing Yang; Changyuan Yu; Zhihao Chen; Junhong Ng; Xiufeng Yang
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Paper Abstract

We propose and demonstrate a novel method to suppress the polarization induced signal fluctuation in Brillouin Optical Time Domain Analysis (BOTDA) fiber distributed sensing system. The polarization diversity scheme contains two polarization beam splitters (PBSs) and a piece of single mode fiber (SMF). The pulsed pump wave is split into two beams with orthogonal polarization states and one of the beams is delayed by a time related to the pulse width. Then, the two beams are recombined. Theoretically, the Degree-of-Polarization (DOP) of the recombined wave is zero and the distributed sensing system is insensitive to the polarization state of the probe. Stable distributed temperature measurement is demonstrated along a 1.2 km SMF.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700421 (16 May 2008); doi: 10.1117/12.785907
Show Author Affiliations
Jing Yang, National Univ. of Singapore (Singapore)
Changyuan Yu, National Univ. of Singapore (Singapore)
Institute for Infocomm Research (Singapore)
Zhihao Chen, Institute for Infocomm Research (Singapore)
Junhong Ng, Institute for Infocomm Research (Singapore)
Xiufeng Yang, Institute for Infocomm Research (Singapore)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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