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采用Nd:YAG调Q激光器输出的1.06μm光脉冲抽运Cr4+:Mg2SiO4晶体,实现Cr4+:Mg2SiO4激光器的增益开关运转。从理论和实验上分析了抽运光采用不同焦距的透镜聚焦和Cr4+:Mg2SiO4激光器采用不同腔长时,抽运光和振荡激光的模式匹配,以及模式匹配与激光器光-光转换效率之间的关系。在最佳的实验条件下,得到中心波长约为1.22μm,能量和脉宽分别为10mJ和8.2ns的激光脉冲,其光-光转换效率达到20%。
The Cr4 +: Mg2SiO4 crystal was pumped by a 1.06μm optical pulse output from a Nd: YAG Q-switched Q-switched laser to realize the gain switching operation of the Cr4 +: Mg2SiO4 laser. Theoretical and experimental analysis of the pump focus with different focal lengths of the lens and Cr4 +: Mg2SiO4 lasers with different cavity length, the pumping light and oscillation laser pattern matching, and the pattern matching and laser light - light conversion efficiency between relationship. Under the optimal experimental conditions, the laser pulse with the center wavelength of about 1.22μm and the energy and pulse width of 10mJ and 8.2ns respectively was obtained, and the light-to-light conversion efficiency reached 20%.