Abstract
Stimulated Brillouin scattering(SBS) is the most notable nonlinear phenomenon occurred in optical fibers, because the threshold for SBS is the lowest compared with the other nonlinear phenomena.The frequency shift of SBS depends on external stimuli such as temperature and strain1,2 as well as fiber parameters. This dependency has been investigated and applied to the distributed fiber sensing.3,4 In these approaches, it is assumed that the temperature distributes uniformly along the fiber or along the sensing length at least. Attention has not been paid to non-uniformity in temperature distribution along fibers except for a few works.5 This paper presents the dependency of SBS threshold and gain bandwidth on the temperature distribution in fibers.
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