2013•Laser Physics LettersRequires access

An efficient all-solid-state doubly resonant sum-frequency continuous-wave ultraviolet laser at 299 nm

B Liu, Y Huo, J F Shi, Y. L. Li

Abstract

We report for the first time coherent ultraviolet radiation at 299?nm by intracavity sum-frequency generation of an 899?nm Nd:YAG laser and a 456?nm frequency doubling Nd:GdVO4 laser. The ultraviolet laser is obtained by using doubly resonant, type-I critical phase matching CsLiB6O10 (CLBO) crystal sum-frequency mixing. With a total diode pump power of 35.6?W (17.2?W pump power for the 899?nm Nd:YAG laser and 18.4 W pump power for the 456?nm Nd:GdVO4 frequency doubling laser), a TEM00 mode ultraviolet laser at 299?nm of 331?mW is obtained. The power stability is better than 3.4% and the laser beam quality M2 factors are 1.22 and 1.17 in the horizontal and vertical dimensions respectively.

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Key concepts: Ultraviolet, Laser, Continuous wave, Materials science, Physics, Optics, Atomic physics