title: 200-mW-average power ultraviolet generation at 0.193 microm in K2Al2B2O7.
abstract: 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.
authors.affiliation: Faculty of Photonics Science, Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, Hokkaido, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Umemura
authors.forename: Miwako
authors.initials: M
authors.lastname: Ando
authors.forename: Kaori
authors.initials: K
authors.lastname: Suzuki
authors.forename: Eiko
authors.initials: E
authors.lastname: Takaoka
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Kato
authors.forename: Zhang-Gui
authors.initials: ZG
authors.lastname: Hu
authors.forename: Masashi
authors.initials: M
authors.lastname: Yoshimura
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Mori
authors.forename: Takatomo
authors.initials: T
authors.lastname: Sasaki