Use of Fabry-Pérot lasers for simultaneous distributed strain and temperature sensing based on hybrid Raman and Brillouin scattering

In this paper we propose the use of multi-longitudinal mode lasers, such as Fabry-Pérot (FP) lasers, for simultaneous distributed strain and temperature sensing based on hybrid Brillouin and Raman scattering. Fabry-Pérot lasers allow for high-power Raman intensity measurement and the simultaneous detection of the Brillouin frequency shift parameter for all FP longitudinal modes, by using a self-heterodyne detection scheme based on a multi-wavelength optical local oscillator. Experiments point out significant improvement in hybrid sensor performance, also suggesting further potential benefits when combining the use of FP lasers with optical coding techniques and/or optical amplification.


Published in:
Proceedings of SPIE, 7503, 750328
Presented at:
20th International Conference on Optical Fibre Sensors, Edinburgh, United Kingdom, 05 October 2009
Year:
2009
ISSN:
1996-756X
ISBN:
9780819478146
Laboratories:




 Record created 2012-11-01, last modified 2018-03-17

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