Experimental analysis of the temperature dependence of the Brillouin gain spectrum in short-length single-mode ber

Abstract

The Brillouin backscattered wave was examined in a short-length single-mode ber at different ambient temperatures using a 1553-nm wavelength laser source. To obtain Brillouin scattering depending on the temperature change in a 95-m long single-mode ber cable, the Brillouin optical time domain re ectometry (BOTDR) technique was used. In this technique, a 1553 nm wavelength signal was sent from one side of the test ber. The FC/APC connector was attached to the other end of the test ber. The temperature parameters of the single-mode ber cables of different brands and types can be obtained using Brillouin scattering. The Brillouin frequency shift is found 0.93 MHz/ ◦ C. Measured linear change demonstrated its use as the temperature sensor of Brillouin Scattering.