期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 34, 期 2, 页码 129-132出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2022.3142012
关键词
Pr:LiYF4 crystal; intracavity frequency doubling; ultraviolet; continuous-wave
资金
- Sichuan Science and Technology Program [2021YFSY0028]
- Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices [KF202102]
- National Outstanding Youth Science Fund Project of National Natural Science Foundation of China [6202206]
This study demonstrates high-power continuous-wave ultraviolet laser generation through intracavity frequency doubling, and replaces the use of He-Cd vapor laser with solid-state 320 nm ultraviolet laser in various applications.
Intracavity frequency doubling of diode-pumped continuous-wave Pr3+ laser in visible spectral region is a highly efficent and cost-effective method for the generation of high-performance continuous-wave ultraviolet laser. However, to date, diode-pumped continuous-wave frequency doubled Pr3+-based ultraviolet laser has still been power limited only to about one watt. In this work, employing two 12-W blue diode lasers as pump sources individually, we achieved maximum output powers up to 1.82 W and 1.73 W of ultraviolet lasers at about 320 nm by intracavity frequency doubling of continuous-wave Pr:LiYF4 (YLF) lasers at 640 nm. The used nonlinear frequency doubler is a 12-mm LBO crystal. For further power scaling of the ultraviolet laser, a total pump power of 24 W was injected into the laser crystal by configuring a double end pumping geometry. Under this situation, a maximum output power of 3.22 W can be achieved, which is believed to be the highest continuous-wave ultraviolet laser via intracavity frequency doubling. This solid-state 320-nm ultraviolet laser could replace the relatively cumbersome He-Cd vapor laser for a variety of applications.
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