title: Efficient 340-nm light generation by a ridge-type waveguide in a first-order periodically poled MgO:LiNbO3.
abstract: Quasi-phase-matched (QPM) UV second-harmonic generation (SHG) in a periodically poled MgO:LiNbO3 waveguide is presented. A ridge-type waveguide with high nonlinearity and strong resistance to photorefractive damage was achieved by use of an ultraprecision machining technique. By use of this waveguide in 1.4-microm periodically poled MgO:LiNbO3, a first-order QPM SHG device for 340-nm UV radiation was demonstrated. In a single-pass configuration, continuous-wave 22.4-mW UV light was generated for a fundamental power of 81 mW, corresponding to a normalized conversion efficiency of 340%/W.
authors.affiliation: Storage Media Systems Development Center, Matsushita Electric Industrial Co., Ltd., 3-1-1 Yagumo-Nakamachi, Moriguchi, Osaka 570-8501, Japan. mizuuchi.kiminori@jp.panasonic.com
authors.forename: Kiminori
authors.initials: K
authors.lastname: Mizuuchi
authors.forename: Tomoya
authors.initials: T
authors.lastname: Sugita
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Kawaguchi
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yoshino
authors.forename: Minoru
authors.initials: M
authors.lastname: Imaeda