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Optimization of the Thickness and the Operating Temperature of LiB$_3$O$_5$, BaB$_2$O$_4$, and KTiOPO$_4$ Crystals for Sum Frequency Generation
New Physics: Sae Mulli 2017; 67: 94~99
Published online January 31, 2017;
© 2017 New Physics: Sae Mulli.

Doo Jae PARK1, Hong CHU2, Jisoo KYOUNG3, Soo Bong CHOI*4

1 Department of Physics, Hallym University, Chuncheon 24252, Korea
2 Laseroptek Co. LTD, Sungnam 13212, Korea
3 Samsung Advanced Institute of Technology, Samsung Electronics Co., Suwon 16678, Korea
4 Department of Physics, Incheon National University, Incheon 22012, Korea
Correspondence to:
Received August 2, 2016; Revised August 11, 2016; Accepted August 11, 2016.
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.
We perform a theoretical study to determine an optimal crystal thickness and operating temperature in sum-frequency generation by using commonly-used nonlinear crystals such as lithium barium borate, beta barium borate, and potassium titanyl phosphate. The optimal thicknesses of those crystals to avoid any decrease in the yield due to interference originating from different path lengths between the two pump pulses are calculated as functions of the fundamental intensity and the pulse width. Additionally, the fluctuation of the sum-frequency generation yield with temperature, which introduces a refractive-index change, is calculated, and the temperature ranges giving low fluctuations in the yield are demonstrated in room-temperature operation.
PACS numbers: 42.65.Ky, 42.65.Re, 42.79.Nv
Keywords: Harmonic generation, Ultrafast process, Optical frequency converter

January 2017, 67 (1)