Abstract
Stimulated Brillouin scattering in optical fibers can be used to measure strain or temperature distribution along the fibers. To operate BOTDA system with high spatial resolution, short-duration pulses must be used, resulting in reduced signal powers causing a decrease of the dynamic range. In this paper, a new technique for enhancement of spatial resolution of BOTDA using a double-pulse was proposed. Experimental results showed that the ability to resolve two adjacent events could be enhanced by using a double-pulse as a pump lightwave without decreases in the dynamic range.
