title: Electro-optical tunable waveguide embedded multiscan Bragg gratings in lithium niobate by direct femtosecond laser writing.
abstract: optical tunable Bragg gratings in lithium niobate fabricated by direct femtosecond laser writing. The hybrid design that consists of a circular type-II waveguide and a multiscan type-I Bragg grating exhibits low loss ordinary and extraordinary polarized guiding as well as narrowband reflections in the c-band of optical communications. High bandwidth tunability of more than a peak width and nearly preserved electro-optic coefficients of r(13) = 7.59 pm V(-1) and r(33) = 23.21 pm V(-1) are demonstrated.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Kroesen
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Horn
authors.forename: Jörg
authors.initials: J
authors.lastname: Imbrock
authors.forename: Cornelia
authors.initials: C
authors.lastname: Denz
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D007834:Lasers; D009556:Niobium / Q000737:chemistry*; D055095:Optics and Photonics; D010087:Oxides / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate