title: Soft proton exchanged channel waveguides in congruent lithium tantalate for frequency doubling.
abstract: We report on stable optical waveguides fabricated by soft-proton exchange in periodically-poled congruent lithium tantalate in the α-phase. The channel waveguides are characterized in the telecom wavelength range in terms of both linear properties and frequency doubling. The measurements yield a nonlinear coefficient of about 9.5 pm/V, demonstrating that the nonlinear optical properties of lithium tantalate are left nearly unaltered by the process.
authors.affiliation: DIEET, University of Palermo, Viale delle Scienze, Bldg no 9, 90128 Palermo, Italy. busacca@unipa.it
authors.forename: Alessandro C
authors.initials: AC
authors.lastname: Busacca
authors.forename: Salvatore
authors.initials: S
authors.lastname: Stivala
authors.forename: Luciano
authors.initials: L
authors.lastname: Curcio
authors.forename: Paolo
authors.initials: P
authors.lastname: Minzioni
authors.forename: Giovanni
authors.initials: G
authors.lastname: Nava
authors.forename: Ilaria
authors.initials: I
authors.lastname: Cristiani
authors.forename: Gaetano
authors.initials: G
authors.lastname: Assanto
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008094:Lithium / Q000737:chemistry*; D017711:Nonlinear Dynamics; D010087:Oxides / Q000737:chemistry*; D011522:Protons; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013635:Tantalum / Q000737:chemistry*
chemical_list: D010087:Oxides; D011522:Protons; C473347:lithium tantalate oxide; D013635:Tantalum; D008094:Lithium