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Output Characteristics of the Second Harmonic Generation of the Actively Q-switched 1064 nm Nd:YVO$_\text{4}$ Laser Using the LiB$_3$O$_5$
New Phys.: Sae Mulli 2019; 69: 439~444
Published online April 30, 2019;
© 2019 New Physics: Sae Mulli.

Chagon PARK, Miru SON, Han Tae CHOO*

Department of Optical Engineering, Kumoh National Institute of Technology, Gumi 39253, Korea
Correspondence to:
Received December 12, 2018; Revised January 30, 2019; Accepted February 2, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The laser-diode-pumped actively Q-switched 1064~nm Nd:YVO$_4$ laser with acousto-optic effects was constructed. When the pulse repetition rate was 8~kHz and the incident pump power was 19~W, the output powers of the 1064 nm fundamental beam in the linear cavity and the folded cavity were 5.75 W and 4.60 W, respectively. The output power slope efficiencies for the pump power were 33.8\% and 28.6\%, respectively. Using LBO (Lithium triborate, LiB$_3$O$_5$), the frequency-doubled 532 nm second-harmonic-generation (SHG) output powers from the linear extracavity and the L-shaped folded intracavity were measured at 2.25 W and 2.60 W, respectively, and the output power slope efficiencies for the pump power were measured at 14.4\% and 15.4\%, respectively. The shortest pulse widths were 10~ns in the extracavity and 25.2~ns in the intracavity, with a pulse repetition rate of 8~kHz and a pump power of 17 W.
PACS numbers: 42.55.Xi, 42.60.Gd, 42.60.Jf, 42.65.Ky
Keywords: Nd:YVO$_4$ laser, Harmonic generation, Actively Q-switched, Acousto-optic

April 2019, 69 (4)
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