title: Electro-optical tunable waveguide Bragg gratings in lithium niobate induced by femtosecond laser writing.
abstract: We report the fabrication of femtosecond laser-induced, first-order waveguide Bragg gratings in lithium niobate in the low repetition rate regime. Type-II waveguides are written into an x-cut lithium niobate wafer and structured periodically to achieve narrowband reflections at wavelengths around 1550 nm. Additionally, electrodes are employed to allow for electro-optic tuning of the spectral response. We demonstrate wavelength control of the central reflection peak by applying a static external electric field. A maximum shift of the reflection peak of Δλ = 625 pm is observed.
authors.affiliation: Nonlinear Optical Lithography, Institute of Applied Physics and Center for Nonlinear Science, Münster, Germany. w.horn@wwu.de
authors.forename: W
authors.initials: W
authors.lastname: Horn
authors.forename: S
authors.initials: S
authors.lastname: Kroesen
authors.forename: J
authors.initials: J
authors.lastname: Herrmann
authors.forename: J
authors.initials: J
authors.lastname: Imbrock
authors.forename: C
authors.initials: C
authors.lastname: Denz
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D008027:Light; D008962:Models, Theoretical; D009556:Niobium / Q000737:chemistry*; D055096:Optical Devices; D010087:Oxides / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate