title: Monolithic wavelength converter for ultraviolet light by use of a Gd(x)Y(1-x)Ca4O(BO3)3 crystal.
abstract: Gd(x)Y(1-x)Ca4O(BO3)3 (GdYCOB) is a promising nonlinear optical crystal that shows high effective nonlinearity d(eff), noncritical phase matching, and high chemical stability. We report on the fabrication and characteristics of a monolithic wavelength converter, which generates ultraviolet light by the incidence of a 1.064 microm near-infrared laser. The converter consists of GdYCOB for third-harmonic generation, KTiOPO4 (KTP) for second-harmonic generation, and a wave plate. GdYCOB has the advantage of an extremely wide angular acceptance bandwidth, whereas KTP exhibits a high effective nonlinear coefficient and a broad temperature bandwidth. Consequently the combination of these crystals results in highly efficient and stable ultraviolet conversion for constructing a compact and robust ultraviolet laser.
authors.affiliation: Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Hatano
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
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ito