Simultaneous distributed strain and temperature measurement
- 1 September 1999
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 38 (25) , 5372-5377
- https://doi.org/10.1364/ao.38.005372
Abstract
Brillouin-scattering-based sensors are capable of measuring either the strain or the temperature along the length of an optical fiber in a distributed fashion through measurement of the Brillouin-frequency shift. The cross sensitivity of the frequency shift to these two parameters makes it impossible to differentiate between them by measurement of the frequency shift alone. We report on a new technique that permits the simultaneous measurement of strain and temperature to resolutions of ±178 µε and ±3.9 °C at a spatial resolution of 3.5 m by incorporation of the Brillouin-loss peak power with the conventional Brillouin-frequency measurement.Keywords
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