High efficiency generation of 355 nm radiation by extra-cavity frequency conversion |
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| Authors: | Bin Li Jianquan Yao Xin Ding Quan Sheng Peng Wang |
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| Affiliation: | College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China Key Laboratory of Opto-electronics Information Science and Technology, Ministry of Education, Tianjin 300072, China |
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| Abstract: | High efficiency extra-cavity third harmonic generation (THG) of 355 nm 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, average power of 6.75 W at 1064 nm was generated with the repetition rate 12 kHz and pulse duration 10 ns. Using the extra-cavity frequency conversion of three critical phase match (CPM) LiB3O5 (LBO) crystals, 3.2 W third harmonic radiation at 355 nm was obtained. The optical-to-optical (1064 nm to 355 nm) conversion efficiency was up to 47.4%. |
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