title: Spectral Measurement of the Film-Substrate Index Difference in Proton-Exchanged LiNbO(3) Waveguides.
abstract: We report the spectral characterization of proton-exchanged lithium niobate (PE:LiNbO(3)) waveguides in terms of the variation of the refractive-index difference between the waveguiding layer and the substrate. The dispersion of the extraordinary refractive-index increase (deltan(e)) is measured from 405 to 1319 nm with several light sources. Two types of proton-exchanged waveguide, prepared under different conditions, are studied. These measurements should be of use in the optimization of PE:LiNbO(3) waveguides for nonlinear optical applications, particularly in second-harmonic generation in the blue-green wavelength region.
authors.forename: K
authors.initials: K
authors.lastname: El Hadi
authors.forename: V
authors.initials: V
authors.lastname: Rastogi
authors.forename: M R
authors.initials: MR
authors.lastname: Shenoy
authors.forename: K
authors.initials: K
authors.lastname: Thyagarajan
authors.forename: M
authors.initials: M
authors.lastname: De Micheli
authors.forename: D B
authors.initials: DB
authors.lastname: Ostrowsky