%0 Journal Article
%T Distributed Temperature and Strain Discrimination with Stimulated Brillouin Scattering and Rayleigh Backscatter in an Optical Fiber
%A Da-Peng Zhou
%A Wenhai Li
%A Liang Chen
%A Xiaoyi Bao
%J Sensors
%D 2013
%I MDPI AG
%R 10.3390/s130201836
%X A distributed optical fiber sensor with the capability of simultaneously measuring temperature and strain is proposed using a large effective area non-zero dispersion shifted fiber (LEAF) with sub-meter spatial resolution. The Brillouin frequency shift is measured using Brillouin optical time-domain analysis (BOTDA) with differential pulse-width pair technique, while the spectrum shift of the Rayleigh backscatter is measured using optical frequency-domain reflectometry (OFDR). These shifts are the functions of both temperature and strain, and can be used as two independent parameters for the discrimination of temperature and strain. A 92 m measurable range with the spatial resolution of 50 cm is demonstrated experimentally, and accuracies of ¡À1.2 ¡ãC in temperature and ¡À15 ¦Ì¦Å in strain could be achieved.
%K optical fiber sensors
%K temperature and strain discrimination
%K stimulated Brillouin scattering
%K Rayleigh scattering
%U http://www.mdpi.com/1424-8220/13/2/1836