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https://doi.org/10.3938/NPSM.70.390
Electro-optically Q-Switched 1064 nm Nd:YVO$ _{4}$ Laser by the Double-End Pump Using Two Laser Crystals
New Phys.: Sae Mulli 2020; 70: 390~396
Published online April 29, 2020;  https://doi.org/10.3938/NPSM.70.390
© 2020 New Physics: Sae Mulli.

Gwang Ryeol PARK1, Cha Gon PARK1, Han Tae CHOO1*, Kun Hee RHYEE2

1Department of Optical Engineering, Kumoh National Institute of Technology, Gumi 39253, Korea
2Department of Optical Engineering, Kumoh National Institute of Technology, Gumi 39253, Korea
Correspondence to: htchoo@kumoh.ac.kr
Received December 9, 2019; Revised February 18, 2020; Accepted March 1, 2020.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
We investigated the output characteristics of a continuous wave, electro-optically Q-switched 1064-nm Nd:YVO$ _{4}$ laser with two laser crystals and a double-end pump with two laser diodes. In the continuous-wave operating mode, the output power and the slope efficiency were measured as 10.3 W and 36%, respectively, when the pumping powers of both pumping lasers were 16 W. In the Q-switched mode, the pulse energy and the pulse width were measured as 667 ± 3.17 $\mu$J and 23.6 $\pm$ 0.84 ns, respectively, and the corresponding peak power was up to 28.8 kW. The Q-switched output showed very stable temporal behavior. Also, we analyzed the thermal lens effects of Nd:YVO$ _{4}$ crystals by using the ABCD matrix method and found that the thermal lensing effect in solid-state laser was reduced.
PACS numbers: 42.55. Rz, 42.60. Gd, 42.60. Lh
Keywords: Double-end-pumped solid state laser, Electro-optically Q-switching, Thermal lensing effect


May 2020, 70 (5)
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