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.
Alahbabi
M N
MN
Optoelectronics Research Centre, University of Southampton, Southampton So17 1BJ, UK. mna@orc.soton.ac.uk
Cho
Y T
YT
Newson
T P
TP