Title :
Electrooptic beam deflection using the leaky mode of a planar waveguide
Author :
Himel, M.D. ; Shi, X. ; Hu, X.Q. ; Moharam, M.G. ; Guenther, K.H.
Author_Institution :
Center for Res. in Electro-Opt. & Lasers, Univ. of Central Florida, Orlando, FL, USA
Abstract :
Electrooptic beam deflection using the leaky mode of a TiO/sub 2/ thin-film waveguide in optical contact with a LiNbO/sub 3/ crystal is discussed. Initial measurements yielded a deflection efficiency of 0.34 mrad/kV and suggest potential for more than an order of magnitude improvement. By depositing the waveguide directly onto the electrooptical crystal, a rugged miniature device that has the potential for high-speed operation and an angular deflection efficiency equal to or higher than that of currently available bulk devices can be fabricated. In addition to the strict tolerances on the coating thickness, the deposited films must have extremely low losses, a high refractive index, and be resistant to environmental effects.<>
Keywords :
electro-optical devices; lithium compounds; optical deflectors; optical films; optical waveguides; titanium compounds; LiNbO/sub 3/ crystal; LiNbO/sub 3/-TiO/sub 2/; TiO/sub 2/ thin film waveguide; angular deflection efficiency; coating thickness; deflection efficiency; electrooptic beam deflection; electrooptical crystal; environmental effects; high-speed operation; leaky mode; losses; planar waveguide; refractive index; rugged miniature device; strict tolerances; Coatings; Electrooptic devices; Electrooptical waveguides; High speed optical techniques; Optical films; Optical planar waveguides; Optical refraction; Optical variables control; Optical waveguides; Planar waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
