title: Optical-damage-free guided second-harmonic generation in 1% MgO-doped stoichiometric lithium tantalate.
abstract: Room-temperature cw second-harmonic generation from telecom wavelengths, with 30% W(-1) cm(-2) efficiency and second-harmonic power levels up to 41 mW, was achieved in buried waveguides fabricated by reverse-proton exchange in 1% MgO-doped stoichiometric lithium tantalate without any evidence of optical damage. The technology proves suitable for the realization of efficient nonlinear frequency converters and all-optical devices.
authors.affiliation: Dipartimento di Fisica-Politecnico INFM, and Instituto di Fotonica e Nanotecnologie-CNR, Piazza L. da Vinci 32, 20133 Milan, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Lobino
authors.forename: M
authors.initials: M
authors.lastname: Marangoni
authors.forename: R
authors.initials: R
authors.lastname: Ramponi
authors.forename: E
authors.initials: E
authors.lastname: Cianci
authors.forename: V
authors.initials: V
authors.lastname: Foglietti
authors.forename: S
authors.initials: S
authors.lastname: Takekawa
authors.forename: M
authors.initials: M
authors.lastname: Nakamura
authors.forename: K
authors.initials: K
authors.lastname: Kitamura