标题：Thermal lens determination of LD end-pumped solid-state laser with stable resonator by slit scanning method
作者：Zheng, J; Zhao, SZ; Chen, L
作者机构：[Zheng, J; Zhao, SZ; Chen, L]Shandong Univ, Dept Opt, Jinan 250100, Peoples R China.
通讯作者地址：[Zheng, J]Shandong Univ, Dept Opt, Jinan 250100, Peoples R China.
来源：OPTICS AND LASER TECHNOLOGY
关键词：end-pumped laser; slit scanning method; M-2 factor; thermal lens
摘要：A simple method to determine the thermal focal length of LD end-pumped solid-state laser with stable resonator is presented. The M-2 factor describing the quality of the beam can be obtained by scanning a slit through the multi-mode Gaussian beam field. The waist width of the beam and the corresponding TEM00 under the same parameters of laser are then deduced through the law of multi-mode Gaussian beam propagation. Based on the standard matrix theory of stable resonator, the thermal focal length of the gain medium can be easily achieved. To show the application of this approach, the thermal focal length of an LD pumped Nd:YVO4 laser is measured and the experimental results are in agreement with the theoretical prediction. (C) 2002 Published by Elsevier Science Ltd.