Distributed birefringence, strain and temperature measurement by homodyne BOTDR

Yuangang Lu; Xiaoyi Bao; Liang Chen

doi:10.1117/12.2012124

26 October 2012 Distributed birefringence, strain and temperature measurement by homodyne BOTDR

Yuangang Lu, Xiaoyi Bao, Liang Chen

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421CB (2012) https://doi.org/10.1117/12.2012124
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A novel distributed fiber birefringence, strain and temperature measurement based on homodyne Brillouin optical time domain reflectometry (BOTDR) is proposed. Birefringence measurement is based on the beat period detection of Brillouin beat of the same acoustic mode. Strain and temperature are obtained by measuring the power changes of Brillouin beat spectrum (BBS), which corresponds to the optical interaction of different acoustic modes in a complex profile fiber. The birefringence of a 4.3 km large-effective-area fiber (LEAF) was measured with 0.6-m spatial resolution, and strain and temperature at the end of a 4.5 km LEAF were measured at 1.5-m resolution in 140s.

Citation Download Citation

Yuangang Lu, Xiaoyi Bao, and Liang Chen "Distributed birefringence, strain and temperature measurement by homodyne BOTDR", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421CB (26 October 2012); https://doi.org/10.1117/12.2012124

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