348.9 nm Intra-Cavity Frequency-Doubling Ultraviolet Laser in Blue Laser Diode Pumped Pr:YLF Crystal

NIU Na1 QU Dapeng1 DOU Wei1 REN Guangsheng1 ZHOU Yang1 XIA Lei1 LÜ Minhang1 ZHENG Quan1,2

(1.Changchun New Industries Optoelectronics Technology Co., Ltd., Changchun, Jilin, China 130012)
(2.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, China 130033)

【Abstract】A 348.9 nm intra-cavity frequency-doubling ultraviolet laser in blue laser diode pumped Pr: YLF crystal is designed, in which a Z-folded cavity structure is adopted. A 444 nm blue laser diode with pump power of 1.4 W and a 469 nm blue laser diode with pump power of 1.5 W obtained are combined by a 45° combiner film as a pump laser for the Pr: YLF crystal which has a length of 5 mm and a doping concentration (mass fraction) of 0.5%. In addition, the type I phase-matched LBO crystal is chosen for frequency doubling. By optimizing the resonator mirror coating and structural design, we achieve a continuous ultraviolet laser output with a maximum power of 132.2 mW, a central wavelength of 348.9 nm, and an optical-to-optical conversion efficiency of 4.5% when pump power is the maximum.

【Keywords】 laser; ultraviolet laser; Pr:YLF crystal; blue laser diode;


【Funds】 Science and Technology Program of Changchun City (16SS18)

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(Translated by CAI ZJ)


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This Article


CN: 31-1339/TN

Vol 45, No. 12, Pages 19-23

December 2018


Article Outline


  • 1 Introduction
  • 2 Experimental study
  • 3 Conclusions
  • References