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Proceedings Paper

Fast distributed temperature sensing using Brillouin beat spectrum of large effective area fiber (LEAF)
Author(s): Shahna M. Haneef; Prasanth P.P.; Bhargav S.; Deepa Venkitesh; Balaji Srinivasan
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Paper Abstract

We investigate the temperature dependence of the beat spectra of stimulated Brillouin scattering from a large effective area fiber (LEAF) in an Optical Time Domain Reflectometry (OTDR) configuration. The multiple gain peaks inherent to the design of this fiber undergo homodyning at the receiver and the amplitude of one of the beat tones is monitored as a function of temperature for a 4 km long fiber. Contrary to previous reports, the beat signal of the first two peaks is found to be decreasing with temperature. The above measurement is performed within 4 ms, thus opening the possibility of dynamic measurement of temperature and strain.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576Y (2 June 2014); doi: 10.1117/12.2059735
Show Author Affiliations
Shahna M. Haneef, Indian Institute of Technology Madras (India)
Prasanth P.P., Indian Institute of Technology Madras (India)
Bhargav S., Indian Institute of Technology Madras (India)
Deepa Venkitesh, Indian Institute of Technology Madras (India)
Balaji Srinivasan, Indian Institute of Technology Madras (India)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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