200-mW-average power ultraviolet generation at 0.193 microm in K2Al2B2O7.
K2Al2B2O7 has been found to be phase matchable for type-1 sum-frequency generation (SFG) at 0.193 microm by mixing the Nd:YAG laser wavelength at 1.0642 microm and the SFG output of the RbTiOAsO4 optical parametric oscillator tuned at 0.2358 microm. An average power of 200 mW at 10 kHz was obtained in a 7-mm-long crystal. In addition, the Sellmeier equations and the thermo-optic dispersion formula, which predict well the phase-matching conditions and temperature phase-matching bandwidths (FWHM) for second-harmonic generation and SFG in the 0.193-0.669-microm range, are presented.
Umemura
Nobuhiro
N
Faculty of Photonics Science, Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, Hokkaido, Japan.
Ando
Miwako
M
Suzuki
Kaori
K
Takaoka
Eiko
E
Kato
Kiyoshi
K
Hu
Zhang-Gui
ZG
Yoshimura
Masashi
M
Mori
Yusuke
Y
Sasaki
Takatomo
T