Influence of heat transfer on thermal effects of the end-pumped laser crystal  

作　　者：张引科 贺艳平 昝会萍 杨浩 

机构地区：[1]School of Science,Xi'an University of Architecture and Technology

出　　处：《Optoelectronics Letters》2010年第6期439-442,共4页光电子快报（英文版）

基　　金：supported by the Basic Research Grant Fund of Shaanxi Province Government of China (No.2007A15)

摘　　要：A thermal model of crystal is established.The temperature field differential equation of the diode-end-pumped laser crystal with circular cross-section and new boundary conditions,in which the convection heat transfer is supposed to exist between laser crystal ends and air,is established.The analytical expressions of temperature field,thermal distortion and additional optical path difference(OPD) of crystal are obtained.By numerical calculation,the influence of heat transfer on the thermal effects of laser crystal Nd:YAG is studied.Results show that crystal's thermal effects,including temperature field,thermal distortion,OPD and thermal focal length,are all weakened as the heat transfer through ends of crystal is strengthened.This conclusion could be used to control thermal effects of laser crystal and improve laser working stability.A thermal model of crystal is established.The temperature field differential equation of the diode-end-pumped laser crystal with circular cross-section and new boundary conditions,in which the convection heat transfer is supposed to exist between laser crystal ends and air,is established.The analytical expressions of temperature field,thermal distortion and additional optical path difference（OPD） of crystal are obtained.By numerical calculation,the influence of heat transfer on the thermal effects of laser crystal Nd：YAG is studied.Results show that crystal＇s thermal effects,including temperature field,thermal distortion,OPD and thermal focal length,are all weakened as the heat transfer through ends of crystal is strengthened.This conclusion could be used to control thermal effects of laser crystal and improve laser working stability.

关 键 词：二极管端面泵浦 激光晶体 热效应 传热 解析表达式 附加光程差 YAG激光 温度场 

分 类 号：O73[理学—晶体学]