LD端面泵浦Nd：KGW激光器热效应的理论研究  

Theoretical Study of Thermal Effect in Diode-end-pumped Nd:KGW Laser

作　　者：刘树山[1] 刘敏[1] 李雷[1] 陈飞[1] 王伟卫[1] 刘杰[1] 

机构地区：[1]山东师范大学物理与电子科学学院,山东济南250014

出　　处：《红外》2008年第6期31-35,共5页Infrared

基　　金：山东省自然科学基金(Y2007G01)

摘　　要：通过建立晶体的热传导模型,合理设定边界条件和求解泊松方程,得到了晶体内部的温度分布图。进而计算了Nd:KGW晶体由端面形变引起的光程差和总的光程差,同时得到了不同抽运功率下的热焦距。计算结果表明,Nd:KGW晶体的热效应十分严重,晶体的端面形变是导致热透镜效应的主要因素。The temperature field distribution in a Nd ： KGW crystal is obtained by establishing a thermal conduction model of a laser crystal, setting a reasonable boundary and solving the Poisson equation. Moreover, the optical path difference （OPD） induced by the end-face deformation and total OPD are calculated. Simultaneously, the thermal focal lengths of a laser crystal at different pumping powers are obtained. The calculating results show that the thermal effect of the Nd ： KGW crystal is very serious and it is mainly caused by the end-face deformation of the crystal.

关 键 词：端面泵浦 Nd:KGW晶体 泊松方程 热效应 端面形变 热焦距 

分 类 号：TN248[电子电信—物理电子学]