激光与光电子学进展, 2014, 51 (8): 081401, 网络出版: 2014-07-09
大功率准连续355 nm紫外全固态激光器的研究 
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Study on a High Power QCW 355 nm Laser Diode Pumped Solid State Laser
激光器 全固态紫外激光器 声光调Q 和频 三硼酸锂晶体 lasers all solid state ultraviolet laser acousto-optic Q switch sum frequency mixing lithium triborate crystal
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%。
Abstract
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 M2x, M2y is 4.33 and 4.56, respectively, and the degree of power instability is ±2.7%.
田明, 王菲, 李玉瑶, 焦正超, 罗宽, 车英, 王晓华. 大功率准连续355 nm紫外全固态激光器的研究[J]. 激光与光电子学进展, 2014, 51(8): 081401. Tian Ming, Wang Fei, Li Yuyao, Jiao Zhengchao, Luo Kuan, Che Ying, Wang Xiaohua. Study on a High Power QCW 355 nm Laser Diode Pumped Solid State Laser[J]. Laser & Optoelectronics Progress, 2014, 51(8): 081401.
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