Chinese Journal of Lasers B, 1999, 8 (2): 103, 网络出版: 2006-08-08
Experimental Investigation of Thermal Lensing in End-pumped Nd:YVO4 Crystal Using a New Simple Approach
Experimental Investigation of Thermal Lensing in End-pumped Nd:YVO4 Crystal Using a New Simple Approach
摘要
Abstract
The stability of linear planar resonators involved in solid-state lasers is entirely decided by the thermal lens of the laser crystal. There exists a critical point between stable state and unstable state at which the thermally focusing point falls on the surface of one end mirror. Based on this fact, a new method for measuring the thermal focal length has been presented, and applied to three different Nd3+-doped (2%, 0.8%, and 0.5% ) Nd:YVO4 crystals at various absorbed pump power levels up to 10 W, the results show a good agreement with those of theoretical calculation. It also indicates that the thermal lensing is strongly dependent on the Nd3+-doped concentration, and is affected by crystal surface temperature, especially in the situation of weak thermal lensing.
LIU Junhai, LU Jianren, LU Junhua, SHAO Zongshu, JIANG Minhua. Experimental Investigation of Thermal Lensing in End-pumped Nd:YVO4 Crystal Using a New Simple Approach[J]. Chinese Journal of Lasers B, 1999, 8(2): 103. LIU Junhai, LU Jianren, LU Junhua, SHAO Zongshu, JIANG Minhua. Experimental Investigation of Thermal Lensing in End-pumped Nd:YVO4 Crystal Using a New Simple Approach[J]. 中国激光(英文版), 1999, 8(2): 103.