管状激光介质的光学性质  

Optical properties of tube lasing medium

作　　者：朱长虹[1] 李正佳[1] 刘安平[1] 张昀 

机构地区：[1]华中理工大学激光技术与工程研究院

出　　处：《激光技术》1997年第5期262-265,共4页Laser Technology

摘　　要：针对管状激光介质的热透镜效应，提出“Ｃ１判据”和“热感应光线主轴”的观点；推导了二维光线矩阵和热透镜焦距；并指出提高光束质量的主要方法。The paper puts forward the idea about “ C 1 discrimination” and “thermally induced principal optical axis” for thermal lasing effect in tube lasing medium.The parameter C 1 is a factor of the second term of the temperature distribution expression in the cross section of the tube lasing medium.The positive or negative value of C 1 indicates the direction of the gradient between the inner wall and outer wall,relatively indicates the operating mode of the laser.In the effect of thermal lensing,basically the temperature gradient determines the distribution of refractive index in the radial direction.So it is called “thermally induced principal optical axis”.This paper derives two dimension transfer matrix of ray and the focus length of the thermal lens,meanwhile points out the main method of improving beam quality.

关 键 词：管状激光介质 热感应光线主轴 热透镜效应 

分 类 号：TN245[电子电信—物理电子学]