激光二极管端泵平板Nd:YAG、Nd:YVO_4和Nd:GdVO_4晶体热效应比较  

Comparison of thermal effects of Nd:YAG,Nd:YVO_4 and Nd:GdVO_4 crystal slab by laser diode end-pumped

作　　者：曹海宾[1] 高峰[2] 范婷[1] 李金平[1] 

机构地区：[1]石河子大学理学院,新疆石河子832003 [2]中国电子科技集团第三十九研究所,陕西西安710065

出　　处：《红外与激光工程》2011年第12期2365-2369,共5页Infrared and Laser Engineering

基　　金：陕西省教育厅科学研究计划项目(09JK536)

摘　　要：以解析热分析理论为基础,建立了平板Nd:YAG、Nd:YVO4和Nd:GdVO4晶体在激光二极管阵列端泵抽运时的导热微分方程。通过方程求解,得到三种晶体内部温度场和热形变分布的解析式。温度场和热形变场的数值模拟表明:当泵浦光功率Po=30 W、泵浦区域为0.5 mm×0.5 mm时,三种激光晶体的一维温度场、二维温度场分布和热形变量有较大差异。通过对比三种激光晶体的温度分布、相对温升和热形变量,得到了Nd:GdVO4晶体作为中小功率激光晶体是优于Nd:YVO4和Nd:YAG两种晶体的,而Nd:YVO4又优于Nd:YAG晶体。温度场和热形变量数值模拟的结果也可为激光器谐振腔的设计及热效应的消除提供理论依据。Based on the theory of thermal analysis,the heat conduction differential equation of Nd：YAG,Nd：YVO4 and Nd：GdVO4 crystal slab end-pumped by diode laser arrays was built.By solving the equation,the analytic expression of internal temperature field and thermal deformation distribution were obtained.When geometry of pumping diodes corresponds to 0.5 mm×0.5 mm,and the pump power is about 30 W,temperature field and thermal deformation field distribution numerical simulation results show that the distribution of one-dimensional temperature field,two-dimensional temperature field and thermal deformation have great differences.Contrasting with the temperature distribution,relative temperature rise and thermal deformation produces of three kinds of laser crystal,Nd：GdVO4 crystal is superior to Nd：YAG and Nd：YVO4 crystals,and Nd：YVO4 crystal is superior to Nd：YAG crystal.These results will supply a theoretical basis for design and relief of thermal effects of cavity laser.

关 键 词：平板Nd:YAG、Nd:YVO4、Nd:GdVO4晶体 温度场 热形变场 

分 类 号：TN36[电子电信—物理电子学] TN405.983