83 W YellowGreen Laser at 556 nm from Frequency-Doubling
of a Q-Switched Nd:YAG Laser at 1112 nm in LBO¹

Z. C. Wang^{a, b}, J. L. Xu^a, Y. Bo^a, *, Q. J. Peng^a, S. Y. Xie^a, Y. T. Xu^a,
F. Yang^a, J. Y. Zhang^a, D. F. Cui^a, and Z. Y. Xu^a

^a Research Center for Laser Physics and Technology,
Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry,
Chinese Academy of Sciences, Beijing 100190, China

^b Graduate School of the Chinese Academy of Sciences, Beijing 100190, China

*e-mail: boyong@tsinghua.org.cn

Received August 16, 2011; in final form, August 20; published online November 28, 2011

Abstract—We demonstrate a high power 556 nm yellow–green laser by intracavity frequency doubled of the
diode-pumped 1112 nm Nd:YAG laser in a symmetrical L-shaped flat-flat cavity. The coatings of the resonator
mirrors were carefully designed to achieve efficient operation of fundamental wavelength of the laser at 1112
nm. By using a type-II phase matching LBO nonlinear crystal as the frequency-doubler, the maximum output
power of the 556 nm laser was measured to be as high as 83 W with a pulse repetition frequency (PRF) of 10
kHz under incident pump power of 1150 W, corresponding to an optical-to-optical conversion efficiency of
about 7.2%. The fluctuation of output power was less than 2% over 30 min.

DOI: 10.1134/S1054660X12010240

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