261 nm frequency-doubling UV laser in bi-wavelength blue laser diode pumped Pr:YLF crystal

Chen Qing; Pu Shuangshuang; Niu Na; Zhou Yang; Zheng Quan

doi:10.3788/IRLA20200090

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%.

261 nm frequency-doubling UV laser in bi-wavelength blue laser diode pumped Pr:YLF crystal

1. Changchun New Industries Optoelectronics Technology Co., Ltd, Changchun 130012, China;

2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Received Date: 2020-05-11

Rev Recd Date: 2020-06-21

Publish Date: 2020-09-22

Key words:

Abstract: 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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Reference (14)

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261 nm frequency-doubling UV laser in bi-wavelength blue laser diode pumped Pr:YLF crystal

doi: 10.3788/IRLA20200090

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