1480nm激光泵浦单模光纤受激拉曼效应实验研究  

Stimulated Raman scattering in standard single-mode fibers pumped by 1 480 nm

作　　者：赵霁虹[1] 阮双琛[1] 张敏[1] 

机构地区：[1]深圳大学工程技术学院,深圳518060

出　　处：《深圳大学学报（理工版）》2005年第1期27-30,共4页Journal of Shenzhen University(Science and Engineering)

基　　金：广东省自然科学基金资助项目(011736)

摘　　要：用拉曼光纤激光器产生的中心波长为1480nm的连续激光作为泵浦源,研究不同泵浦功率下76km常规单模光纤所产生的受激拉曼散射现象.实验中,泵浦功率从100mW到4W逐次注入光纤中.当泵浦功率增至2 2W时,观察到拉曼现象,发生泵浦能量向斯托克斯能量的有效转移,散射光强呈指数规律增长.在频移13 26THz处获得最大增益,呈现单峰斯托克斯光谱,其线宽大约为2nm,随着泵浦功率增强,基本保持不变.当泵浦功率增至2 5W时,呈现双峰斯托克斯光谱,斯托克斯峰442cm-1(13 26THz)处的峰值功率基本饱和,而485cm-1(14 6THz)处的尖峰却持续增长;且较短波长峰渐渐向长波长峰靠近,发生显著能量红移.Stimulated Raman scattering was generated by injecting the continuous wave with a center wavelength at (1 480) nm produced by a Raman fiber laser into a 76 km long standard single-mode fiber. The pump power was launched from 100 mW up to 4 W gradually. The threshold power was measured to be about 2.2 W and the peak intensity of Raman Scattering grows up exponentially when the input power exceeds the threshold power. The linewidth of Stokes is about 2 nm and keep nearly unchanged as the pump power increased. With the increase of the input power, the transfer efficiency from the pump peak to Stokes peak is increased. During this process, the peak at 442 cm^(-1) is saturated in power, but the other at 485 cm^(-1) is kept on increasing. The shorter wavelength peak shifts gra-dually to the longer wavelength peak.

关 键 词：受激拉曼散射 单模石英光纤 阈值功率 

分 类 号：TN913.2[电子电信—通信与信息系统]