【作者】 陈晴川；

【导师】 王英；

【作者基本信息】 华中科技大学 ， 光学工程， 2004， 硕士

【摘要】 光纤激光器作为第三代激光器,具有相对于传统激光器许多的优点,并且可以在急需的13XXnm和14XXnm波段得到大功率输出,这弥补了半导体激光器目前发展的不足。光纤拉曼放大器(FRA)是光纤放大器中的一种,近年来受到很多关注,它采用大功率14XXnm波段光纤激光器作为泵浦源,传输光纤作为增益介质,利用光纤本身的非线性效应实现光放大。本文对光纤拉曼激光器进行了理论分析、实验实现和优化设计。主要研究内容和研究结果如下:分析并且实现了自制1342nm波长、单模尾纤输出的半导体泵浦固体激光器,并进行了优化,以作为RFL的起始波长使用;对RFL的理论模型进行了较全面的理论分析,在数学模型基础上,采用四阶龙格-库塔(Runge-Kutta)法进行了理论计算;对RFL的各种优化方式,包括选择优化的反射率和采用泵浦光反向泵浦,进行了理论的讨论和实验实现。更多还原

【Abstract】 As the third generation laser, fiber laser have many attractive specialities comparing with conventional laser. It can be used in the 13XXnm/14XXnm band where high power laser is urgently needed, however the output power of current laser diode is not high enough. Raman Fiber Amplifier (RFA) is a kind of fiber amplifier, which has been widely investigated in recent years. It uses high power 14XXnm fiber lasers as pump sources, doing amplification by one of the nonlinear effect in the transmission fiber-the stimulated raman scattering (SRS). This dissertation analyzes the principle of RFL and optimizes the output power. The details show as following:Building a SMF-pigtailed Diode Pump Solid-State Laser (DPSSL) operating at 1342nm, used as the pump source of the Raman Fiber Amplifier (RFA).Analyzing the FRL’s model in detail, doing simulation with four-order Runge-Kutta arithmetic.Doing optimization design of Raman Fiber Laser (RFL) by comparing different reflectivities of Fiber Bragg Gratings(FBGs) and using backward pump.更多还原