高功率双包层光纤激光器受激拉曼散射和热效应的理论研究  

Stimulated Raman scattering and thermal effect in high power double clad fiber laser

作　　者：陈吉欣[1] 隋展[2] 陈福深[1] 刘志强[3] 李明中[2] 王建军[2] 罗亦鸣[2] 

机构地区：[1]电子科技大学通信与信息工程学院光纤重点实验室,成都610054 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [3]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2006年第9期1438-1442,共5页High Power Laser and Particle Beams

基　　金：中国工程物理研究院双百人才基金资助课题(2004R0205)

摘　　要：受激拉曼散射和热效应会限制光纤激光器功率的提高。利用高功率光纤激光器的速率方程和热传导方程,理论研究了双端泵浦和分布泵浦下双包层光纤激光器的受激拉曼散射和热效应,得到了光纤中的泵浦光、激光和斯托克斯光的功率分布,光纤激光器的输出特性以及光纤中的温度分布。分析表明,当泵浦功率增大到一定值时,光纤激光器中出现SRS,一部分激光功率会转移给斯托克斯光,影响激光功率进一步提高;与双端泵浦方式相比,分布泵浦下光纤激光器的斜率效率和最大输出功率相差不大,但是,光纤中的温度分布被有效地降低,因此,分布泵浦方式更为有效。Stimulated Raman scattering（SRS） and thermal effect can limit the power scaling of fiber laser. According to rate equations and heat conduction equations, SRS and thermal effect in high power Yb^3＋ doped double clad fiber laser are studied for two-end pumping and distributed pumping. The power distribution of pump, laser and Stokes in the fiber, the output characteristic of fiber laser, and temperature distribution in the fiber are obtained. The results show that the slope efficiency and maximum output power for distributed pumping are slightly less than the ones for two-end pumping, but the temperature distribution is decreased effectively for distributed pumping. The results are very useful for designing high power fiber lasers.

关 键 词：高功率激光 双包层光纤 光纤激光器 泵浦方式 受激拉曼散射 热效应 

分 类 号：TN248[电子电信—物理电子学]