This paper describes a theoretical investigation of Brillouin optical-fiber time-domain analysis (BOTDA). BOTDA uses Brillouin interaction in optical fibers to nondestructively analyze attenuation characteristics of the optical fibers. The dynamic range performance of BOTDA is approximately 10 dB greater than that of conventional optical time-domain reflectometry. Tsuneo Horiguchi (M'
Temperature distribution in silica single-mode optical fibers, from -30 to +60 degrees C, is successfully measured by using Brillouin optical-fiber time-domain analysis. A temperature measurement accuracy of 3 degrees C with a spatial resolution of 100 m is attained over a fiber length of 1.2 km.
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