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根据2μm掺铥光纤激光泵浦中红外硫化玻璃光纤拉曼激光器的模型,采用非线性耦合方程组对激光器的性能进行了研究与分析。同时,对激光器各参数包括光纤长度、输出耦合器反射率、光纤散射损耗对激光器性能的影响进行了分析并给出了优化结果。数值仿真结果表明,在一定条件下,2μm泵浦硫化玻璃光纤产生拉曼激光的斜率效率可以超过85%。另外,光纤长度和输出耦合器反射率不仅对输出激光功率的影响很大,而且是相互影响的,必须同时进行优化。结果也表明,输出激光的功率随光纤散射损耗增加急剧线性下降。以上的结果可以用于硫化玻璃光纤级联拉曼激光器的实验指导和优化设计。
According to the model of 2μm doped 铥 fiber laser-pumped infrared-cured glass fiber Raman laser, the performance of the laser was studied and analyzed by nonlinear coupling equations. At the same time, the influence of the parameters of the laser, including the length of the fiber, the output coupler reflectivity and the fiber loss on the performance of the laser, is analyzed and the optimization results are given. The numerical simulation results show that under certain conditions, the slope efficiency of Raman laser produced by 2μm pump glass can exceed 85%. In addition, fiber length and output coupler reflectance not only have a significant impact on the output laser power, but also influence each other and must be optimized at the same time. The results also show that the output laser power decreases sharply with the increase of fiber scattering loss. The above results can be used to experimentally guide and optimize the design of glass fiber cascade Raman lasers.