Title :
Utilization of a dispersion-shifted fiber for simultaneous measurement of distributed strain and temperature through Brillouin frequency shift
Author :
Lee, C.C. ; Chiang, P.W. ; Chi, S.
Author_Institution :
Inst. of Electroopt. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
We propose and realize a new method that utilizes a dispersion-shifted fiber having compound compositions with different temperature coefficients in core to simultaneously measure the distributed strain and temperature based on Brillouin frequency shift. In a 3682-m sensing length of large-effective-area nonzero dispersion-shifted fiber, a temperature resolution of 5/spl deg/C, a strain resolution of 60 μ/spl epsi/, and a spatial resolution of 2 m are achieved simultaneously.
Keywords :
Brillouin spectra; distributed sensors; fibre optic sensors; optical fibre dispersion; optical time-domain reflectometry; spectral methods of temperature measurement; strain measurement; strain sensors; temperature sensors; 3682 m; Brillouin frequency shift; dispersion-shifted fiber; distributed fibre sensors; distributed strain measurement; distributed temperature measurement; large-effective-area nonzero dispersion-shifted fiber; sensing length; simultaneous measurement; spatial resolution; strain resolution; temperature coefficients; temperature resolution; Brillouin scattering; Capacitive sensors; Frequency measurement; Optical fiber dispersion; Optical fiber testing; Optical fibers; Power measurement; Spatial resolution; Strain measurement; Temperature sensors;
Journal_Title :
Photonics Technology Letters, IEEE
