title: Distributed-feedback optical parametric oscillation by use of a photorefractive grating in periodically poled lithium niobate.
abstract: We report a demonstration of distributed-feedback (DFB) optical parametric oscillation (OPO) by writing photorefractive gratings in periodically poled lithium niobate (PPLN). The photorefractive DFB structures were fabricated by illumination of PPLN with UV light through a photomask and by writing of PPLN with UV-light gated interfering laser beams at 532 nm. Evidence of OPO was observed from the spectral narrowing at the 1438.8- and the 619.3-nm signal wavelengths from 1064- and 532-nm-pumped PPLN crystals with the DFB grating periods phase matched to the 4084.5- and 3774-nm idler wavelengths, respectively.
authors.forename: A C
authors.initials: AC
authors.lastname: Chiang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Lin
authors.forename: T D
authors.initials: TD
authors.lastname: Wang
authors.forename: Y C
authors.initials: YC
authors.lastname: Huang
authors.forename: J T
authors.initials: JT
authors.lastname: Shy