【摘要】 本文考虑了XeCl激光振荡器中放大自发辐射对阈值条件和输出特性的影响,建立了激光和放大自发辐射归一化光通量的耦合输运方程,求得激光和放大自发辐射光通量分析和输出功率的解析表达式。结果表明:(1)放大自发辐射的存在增加了激光的阈值增益;(2)随着腔的Q值的提高,放大自发辐射的输出减弱;(3)适当地选取腔镜的反射率,即可有效地抑制放大自发辐射,从XeCl准分子激光器空间相干性的测量证实了上述结果。更多还原

【Abstract】 In this paper the transport equations of iaser and ASE normalized fluxes are set up taking into consideration the influence of ASE on threshold condition and the output characteristics of XeCl laser oscillator. The analytic expressions of laser and ASE fluxes distribution and output power are obtained.The results show that: (1) The threshold gain increases in consideration of ASE. (2) The ASE output decreases with cavity Q increases. (3) ASE flux can be syppressed effectively by choosing reflectivity of cavity mirror adequately. This has been proved by the measurement on the space coherence of XeCl excimer laser.更多还原