激光与光电子学进展, 2010, 47 (9): 091402, 网络出版: 2010-07-21
一种改善LD角抽运复合晶体激光器热焦距不对称的方法和初步实验
A Method Improving Asymmetry of Thermal Focal Length of LD Corner-Pumped Composite Slab Lasers and Primary Experiment
固体激光器 角抽运 复合晶体 热焦距 非对称 solid-state lasers corner-pumped composite slab thermal focal length asymmetry
摘要
针对激光二极管(LD)角抽运复合晶体激光器,提出采用绝热槽热沉改善其热焦距不对称的问题,并进行了理论数值计算分析和相关验证实验。分析结果表明,当绝热槽尺寸为0.325 mm×2 mm×14 mm时,复合晶体在宽度和厚度的热焦距基本相等。实验证明在采用绝热槽热沉的情况下,两方向热焦距比由原来的3.86倍缩小到2.19倍,一定程度上补偿了两方向热焦距非对称性,同时提出,考虑端面效应和提高绝热槽加工精度可以进一步使两方向热焦距大致对称。
Abstract
Heat sink with the adiabatic groove is used to improve the asymmetry of the thermal focal length of laser-diode (LD) corner-pumped composite slab lasers. The numerical analysis indicates that the thermal focal length of two directions can be equal when the size of groove is 0.325 mm×2 mm×14 mm. The experimental results show that the difference of the thermal focal length of two directions decreases from 3.86 times to 2.19 times when the heat sink with the adiabatic groove is employed. Finally the calculation considering end effect and improving process precision of groove is put forward to further improve the asymmetry of thermal focal length.
高松, 巩马理, 刘欢. 一种改善LD角抽运复合晶体激光器热焦距不对称的方法和初步实验[J]. 激光与光电子学进展, 2010, 47(9): 091402. Gao Song, Gong Mali, Liu Huan. A Method Improving Asymmetry of Thermal Focal Length of LD Corner-Pumped Composite Slab Lasers and Primary Experiment[J]. Laser & Optoelectronics Progress, 2010, 47(9): 091402.