Suppression of polarization sensitivity in BOTDA fiber distributed sensing system

Jing Yang; Changyuan Yu; Zhihao Chen; Junhong Ng; Xiufeng Yang

doi:10.1117/12.785907

16 May 2008 Suppression of polarization sensitivity in BOTDA fiber distributed sensing system

Jing Yang, Changyuan Yu, Zhihao Chen, Junhong Ng, Xiufeng Yang

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 700421 (2008) https://doi.org/10.1117/12.785907
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

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.

Citation Download Citation

Jing Yang, Changyuan Yu, Zhihao Chen, Junhong Ng, and Xiufeng Yang "Suppression of polarization sensitivity in BOTDA fiber distributed sensing system", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700421 (16 May 2008); https://doi.org/10.1117/12.785907

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