论文部分内容阅读
根据ZBALN光纤拉曼激光器的结构,理论分析了中红外ZBLAN光纤级联拉曼激光器运行方式并建立了泵浦光和斯托克斯光的非线性耦合方程组。基于该方程组,对用高功率掺铥光纤激光器泵浦ZBLAN光纤产生拉曼频移时泵浦光和斯托克斯光在光纤中的演化过程进行了仿真。为了提高激光器性能,对光纤长度、输出耦合器反射率、泵浦功率等激光器参数及其对激光器性能的影响进行了数值分析。数值计算结果表明,用掺铥光纤激光器泵浦ZBLAN光纤可以以较高的光光转换效率产生更长波长的拉曼激光。不同的光纤长度和输出耦合器反射率相互影响,并共同影响激光器的性能。根据以上分析,最终获得了高性能的ZBLAN光纤拉曼激光器的优化参数。
According to the structure of ZBALN fiber Raman laser, the operation mode of mid-infrared ZBLAN fiber cascade Raman laser is theoretically analyzed and the nonlinear coupling equations of pump light and Stokes light are established. Based on the equations, the evolution of pump light and Stokes’ light in the fiber is simulated when Raman shift is generated by pumping ZBLAN fiber with high power fiber laser. In order to improve the performance of the laser, the numerical analysis of the laser parameters such as fiber length, output coupler reflectivity, pump power, and their effects on the laser performance is carried out. The numerical results show that the ZBLAN fiber is pumped with doped fiber laser to produce Raman laser with longer wavelength with higher light-to-light conversion efficiency. The different fiber lengths and the output coupler reflectivity affect each other and together affect the performance of the laser. Based on the above analysis, finally obtained the optimization parameters of high performance ZBLAN fiber Raman laser.