title: Distributed temperature and strain discrimination with stimulated brillouin scattering and rayleigh backscatter in an optical fiber.
abstract: 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 ±1.2 °C in temperature and ±15 με in strain could be achieved.
authors: Department of Physics, University of Ottawa, Ottawa, Ontario, Canada. zhoudapeng@gmail.com
authors: Da-Peng
authors: DP
authors: Zhou
authors: Wenhai
authors: W
authors: Li
authors: Liang
authors: L
authors: Chen
authors: Xiaoyi
authors: X
authors: Bao
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