大功率准连续355nm紫外全固态激光器的研究  

Study on a High Power QCW 355 nm Laser Diode Pumped Solid State Laser

作　　者：田明[1] 王菲[1] 李玉瑶[1] 焦正超 罗宽[1] 车英[1] 王晓华[2] 

机构地区：[1]长春理工大学光电工程学院,吉林长春130022 [2]长春理工大学理学院,吉林长春130022

出　　处：《激光与光电子学进展》2014年第8期116-119,共4页Laser & Optoelectronics Progress

基　　金：吉林省科技支撑计划(20110328)

摘　　要：报道了一台激光二极管(LD)侧面抽运Nd:YAG腔内倍频与和频准连续355 nm紫外激光器。采用双头Q开关调制的LD侧面抽运Nd:YAG激光器,通过在腔内置入I类非临界相位匹配的三硼酸锂(LBO)晶体进行倍频获得532 nm波长准连续激光,置入两块II类相位匹配的LBO晶体对基频光和倍频光进行两次和频,从而获得了大功率准连续355 nm紫外激光输出。在注入电功率为939.6 W、重复频率为8 kHz时,355 nm激光最大输出功率为15.3 W,脉宽为90 ns,总转换效率为1.63%,其光束质量M2x,M2y分别为4.23和4.56,功率不稳定度为±2.7%。A laser diode（LD） side pumped acousto-optic Q-switched Nd：YAG solid state 355 nm ultraviolet laser is reported by using intra cavity double frequency and sum frequency mixing. The Nd：YAG crystal is sidepumped by a LD, the intra cavity green radiation is generated using a type I non-critical phase matched littium triborate （LBO） and subsequent frequency mixing in two type II LBO crystals. A high power and high repetition rate 355 nm ultraviolet laser is obtained by sum frequency mixing back and forth. The output power of 15.3 W at 355 nm is obtained at the pump power of 939.6 W and repetition frequency of 8 kHz with pulse width as short as 90 ns. The conversion efficiency is 1.63%. The beam quality Mx2 My2 is 4.33 and 4.56, respectively, and the degree of power instability is ±2.7%.

关 键 词：激光器 全固态紫外激光器 声光调Q 和频 三硼酸锂晶体 

分 类 号：O437[机械工程—光学工程]