Simultaneous temperature and strain measurement with combined spontaneous Raman and Brillouin scattering.
We report on a novel method for simultaneous distributed measurement of temperature and strain based on spatially resolving both spontaneous Raman and Brillouin backscattered anti-Stokes signals. The magnitude of the intensity of the anti-Stokes Raman signal permits the determination of the temperature. The Brillouin frequency shift is dependent on both the temperature and the strain of the fiber; once the temperature has been determined from the Raman signal, the strain can then be computed from the frequency measurement of the Brillouin signal.
Optoelectronics Research Centre, University of Southampton, Southampton So17 1BJ, UK. mna@orc.soton.ac.uk
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Alahbabi
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Cho
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Newson