用于运动会安防工程的小型激光器的研制

摘要

The paper introduces a kind of miniature laser which is used in Large Games defense system in Beijing. The laser is free of cooling water and uses Cr4 + : YAG as passively Q-switch. Its repetition is 2 Hz and output energy is 20 ～38 mJ. In order to improve the stability and reliability,Nd:Ce:YAG bonded crystal is used as active medium and a pyramid prism is used as the high reflector of the resonator. All of the 50 lasers worked well in the project in spite of the blighted outdoor operation environment in summer.%介绍了一种在大型运动会安保工程使用的一种小型化无水冷激光器,激光器采用Cr4+∶YAG作为被动Q开关,在重复频率2 Hz情况下可获得20 ～38 mJ的输出能量.为改善激光器的性能如稳定性和可靠性,激光工作物质采用了Nd∶ Ce∶ YAG键合晶体,并且使用角锥棱镜作为谐振腔的高反镜.在夏天炎热天气条件下,近50台激光器工作稳定可靠.