激光谐振腔内类透镜介质像差的校正

高能激光器谐振腔中，介质折射率随温度、压力、能量等物理量沿径向变化而呈类透镜分布，由此引起激光振荡特性的改变，产生动态的类透镜介质像差，根据光波的矩阵传输理论，以正支共焦望远型非稳腔为例，用几何方法对激光谐振腔内的类透镜介质效应及其像差校正进行了理论分析，计算结果显示，所给方法能有效消除该像差。

On Lens-Like Medium Aberration Correction in a Laser Resonator

The medium refractive index in a high-power laser resonator will vary with the radial varia- tion of the physical quantities such as the temperature , the pressure current and energy , and its distri- bution is something of a lens-like one. As a result , the oscillation performance of the laser will be changed and the aberration of the lens-like medium will occur. According to the matrix transmission theory of the light wave , with a telescopic confocal unstable resonator as an example , the effect of lens-like medium in the laser resonator and its aberration correction is analyzed with the geometric ap- proach. It is pointed out that this kind of aberrations can be effectively corrected with the method. pro- posed.