变耦合率法测量化学激光器小信号增益

Small signal gain measurement in chemical laser using variable output coupling method

为了评价化学激光器增益发生器模块的性能,采用变耦合率法对化学激光器的小信号增益系数进行了研究。实验中采用的稳定光学谐振腔由2块全反射平面镜、1块全反射凹面镜及1块输出耦合镜组成。将测量结果中存在的饱和光强、非输出损耗和小信号增益的三元拟合问题转化为二元数值问题。通过数值拟合得到了满足工程需求的数据结果,并对该结果进行了误差分析。应用数学方差分析发现平均值二对应的拟合曲线与实验测量结果符合得更好,化学激光器的输出功率存在极大值。

In order to evaluate the performance of the gain generator in a chemical laser,the small signal gain has been measured using the variable output coupling method.The stable resonator was composed of two mirrors,one concave mirror and one outcoupling mirror.The ternary coupling problem about saturation intensity,non-output wasting and small signal gain in measured data was translated into a dualistic numerical problem.Processing results,which met engineering requirements,were derived through numerical fitting,and the errors in experiment and data processing were analyzed.Through the variance analysis,it was found that the fitting curves of the average two accorded with experiment results better than the fitting curves of the average one.There existed a maximum output power in the chemical laser.