高效腔外频率变换紫外激光器
High efficiency extra-cavity frequency conversion UV laser
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摘要: 为了得到高效的腔外频率变换355 nm紫外激光输出，提出了一种利用３块LBO作为非线性频率变换晶体的新方案。采用LD端面泵浦Nd：YAG声光Q开关激光器作为基波源，当入射泵浦功率为25 W、调制频率12 kHz时，获得了6.2 W的1 064 nm激光输出，经过非线性频率变换后，获得了2.7 W的紫外355 nm激光输出，光-光转换率43.4%。Abstract: High efficiency extra-cavity third harmonic generation (THG) of 355 nm beam has been developed. A laser diode（LD） end-pumped, acoustic optical Q-switched Nd:YAG laser was used as the fundamental wave source. With an input pump power of 25 W, the average power of 6.2 W at 1 064 nm was generated with the repetition rate of 12 kHz. Using the extra cavity frequency conversion of three critical phase match LiO3O5 (LBO) crystals, 2.7 W third harmonic radiation at 355 nm was obtained. The optical to optical (1 064 nm to 355 nm) conversion efficiency was up to 43.5%．
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Key words:
- laser techniques /
- uv laser /
- lbo crystal /
- extra-cavity frequency conversion
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