title: Parasitic-light-suppressed quasi-phase-matched optical parametric oscillation device.
abstract: Nonlinear absorption - such as green-induced infrared absorption (GRIIRA) - increases the risk of the catastrophic damage during high peak- power wavelength conversion. We propose a novel concept to suppress parasitic green second-harmonic generation (SHG) in optical parametric oscillation (OPO) using specially engineered quasi-phase-matched (QPM) structures. This selective suppression was achieved by relative π-phase shift in only SHG not OPO. Compared with a periodic device, a parasitic-light-suppressed (PLS) QPM device produced smaller normalized conversion efficiency in green and maintained singly resonant OPO performance.
authors.forename: Hwan Hong
authors.initials: HH
authors.lastname: Lim
authors.forename: Sunao
authors.initials: S
authors.lastname: Kurimura
authors.forename: Nan Ei
authors.initials: NE
authors.lastname: Yu