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Proceedings Paper

Brillouin scattering accompanied by acoustic grating in an optical fiber and applications in fiber distributed sensing
Author(s): Kazuo Hotate
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Paper Abstract

Fiber optic distributed sensing systems based on Brillouin scattering are reviewed. Strain or temperature distribution along an optical fiber can be measured with this phenomenon using time domain and correlation domain techniques. Superior functions have already been demonstrated, such as mm order spatial resolution and kHz order measurement speed. Brillouin scattering is accompanied by acoustic grating, which is generated by thermal vibration of fiber material. Recently, considering the nature of the acoustic grating enhanced through stimulated Brillouin scattering process, various advanced functions have been realized in the distributed sensing, such as discriminative measurement of strain and temperature with a 10 cm resolution by a correlation domain technique, realization of cm order resolution by a time domain technique, and distributed birefringence measurement along a polarization maintaining fiber. These Brillouin based systems are also compared briefly with FBG based systems, including distributed sensing with long-length FBG.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775307 (17 May 2011); doi: 10.1117/12.896854
Show Author Affiliations
Kazuo Hotate, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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