title: Periodic poling of Rb-doped KTiOPO4by coercive field engineering.
abstract: We demonstrate fine-pitch periodic poling of bulk Rb-doped KTiOPO4using a coercive field grating induced by ion-exchange. These samples were used for quasi phase matched (QPM) second harmonic generation at 795 nm with a normalized conversion efficiency of 1.7% W-1cm-1. Additionally, the ion-exchange introduced a refractive index change over the sample thickness resulting in a phasematching wavelength shift of 0.21 nm, adding extra tunability to the QPM device.
authors.forename: Charlotte
authors.initials: C
authors.lastname: Liljestrand
authors.forename: Fredrik
authors.initials: F
authors.lastname: Laurell
authors.forename: Carlota
authors.initials: C
authors.lastname: Canalias