Infrared and Laser Engineering, Volume. 49, Issue S1, 20200090(2020)
261 nm frequency-doubling UV laser in bi-wavelength blue laser diode pumped Pr:YLF crystal
The phase matching BBO was utilized as a frequency-doubling crystal to produce continuous ultraviolet laser with a central wavelength of 261.37 nm and the blue laser diodes with different wavelengths were used to pump the Pr:YLF in different ways. Two different wavelength blue laser diodes (444 nm and 469 nm) were used to pump Pr:YLF separately with V-shaped folded cavity structure. The two blue laser diodes were combined as the pumping source to increase the pumping power while retaining the high polarization absorption efficiency of Pr:YLF crystal after optimization. The length of Pr:YLF crystal was 5 mm, the doping concentration was 0.5%. Continuous 261.37 nm ultraviolet laser output with the maximum output power of 245 mW was obtained when the pumping power was 2 800 mW. The optical-to-optical efficiency was about 8.75%.
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Chen Qing, Pu Shuangshuang, Niu Na, Zhou Yang, Zheng Quan. 261 nm frequency-doubling UV laser in bi-wavelength blue laser diode pumped Pr:YLF crystal[J]. Infrared and Laser Engineering, 2020, 49(S1): 20200090
Category: 激光器与激光光学
Received: May. 11, 2020
Accepted: Jun. 21, 2020
Published Online: Feb. 5, 2021
The Author Email: Qing Chen (chenqinglaser@163.com)