title: Spectral and electro-optic response of UV-written waveguides in LiNbO3 single crystals.
abstract: An experimental study of the spectral and electro-optic response of direct UV-written waveguides in LiNbO3 is reported. The waveguides were written using c.w. laser radiation at 275, 300.3, 302, and 305 nm wavelengths with various writing powers (35-60 mW) and scan speeds (0.1-1.0 mm/sec). Spectral analysis was used to determine the multimode and single mode wavelength regions and, the cut-off point of the fabricated waveguides. Electro-optic characterization of these waveguides reveals that the electro-optic coefficient (r33) decreases for longer writing wavelengths, with a maximum of 31 pm/V for 275 nm and, is reduced to 14 pm/V for waveguides written with 305 nm.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK. cls@orc.soton.ac.uk
authors.forename: C L
authors.initials: CL
authors.lastname: Sones
authors.forename: P
authors.initials: P
authors.lastname: Ganguly
authors.forename: Y J
authors.initials: YJ
authors.lastname: Ying
authors.forename: F
authors.initials: F
authors.lastname: Johann
authors.forename: E
authors.initials: E
authors.lastname: Soergel
authors.forename: R W
authors.initials: RW
authors.lastname: Eason
authors.forename: S
authors.initials: S
authors.lastname: Mailis
mesh_terms: D017076:Computer-Aided Design; D003460:Crystallization; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D009556:Niobium / Q000737:chemistry* / Q000528:radiation effects*; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects*; D012031:Refractometry / Q000295:instrumentation*; D013499:Surface Properties; D014466:Ultraviolet Rays
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate