单模光纤中受激布里渊散射的温度特性

Temperature Characteristic of Stimulated Brillouin Scattering in Single-Mode Fiber

研究了在不同温度下单模光纤受激布里渊散射的阈值和频移,从受激布里渊散射的基本原理出发,分析和讨论了温度对受激布里渊散射阈值和频移特性的影响.设计并搭建了实验系统,测量了不同温度下2km单模光纤受激布里渊散射的光谱和阈值,实验表明,随着温度的升高,布里渊频移逐渐增大,在一定温度范围内,布里渊频移与温度呈线性关系。低温对斯托克斯光有抑制作用,温度越低受激布里渊散射阈值越高。

Stimulated Brillouin scattering （SBS） threshold and frequency shift of single-mode fiber are studied under different temperatures. Based on the theory of SBS, the relation of SBS threshold and frequency shift with temperature is analyzed. Experimental system is designed and built, and SBS spectrum and threshold of 2 km single- mode fiber are measured under different temperatures. The experiments indicate that the Brillouin frequency shift increases linearly with the increasing temperature. Low temperature can suppress Stokes lights. The lower the temperature is, the higher SBS threshold is. Temperature has a direct effect on the SBS of fiber.