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Proceedings Paper

Novel distributed birefringence measurement based on transient Brillouin grating in polarization-maintaining fibers and its application in sensing
Author(s): Yongkang Dong; Xiaoyi Bao; Liang Chen; Yuelan Lv
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Paper Abstract

We propose a novel distributed birefringence measurement method based on transient Brillouin grating (TBG) in a polarization-maintaining (PM) fiber, which uses two short pump pulses to excite a TBG and a long probe pulse to map the transient Brillouin grating spectrum (TBGS) associated with the local birefringence. In experiment, the distributed birefringence of a 7-m Bow-tie PM fiber is measured, and the results show that it exhibits a periodical change with a period of ~ 3 m and variation amplitude of 1.6×10-6 along the entire fiber. In addition, based on the birefringence variation we also realize distributed temperature sensing using a PM photonic crystal fiber with a spatial resolution of 20 cm and a temperature measurement range of a few hundreds degrees Celsius with 2 ns pump pulses, and a temperature resolution of 0.07 °C with a 6 ns probe pulse.

Paper Details

Date Published: 14 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75037Y (14 October 2009); doi: 10.1117/12.848675
Show Author Affiliations
Yongkang Dong, Univ. of Ottawa (Canada)
Xiaoyi Bao, Univ. of Ottawa (Canada)
Liang Chen, Univ. of Ottawa (Canada)
Yuelan Lv, Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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