Title :
Characterization of vapor diffused Zn:LiTaO3 optical waveguides
Author :
Yoon, D.W. ; Eknoyan, O.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
6/1/1988 12:00:00 AM
Abstract :
Diffusion and optical properties of planar waveguides produced in LiTaO3 by a recently developed technique that utilizes Zn diffusion from vapor phase are presented. The waveguides are obtained by 6-h diffusion at temperatures as low as 800°C. The results indicate that Zn is a fast diffusant in LiTaO3 and has activation energies that are slightly less than those for Ti diffusion into LiTaO 3. The diffusion temperatures for Zn are much lower than the 1150-1200°C require for Ti metal indiffusion. The diffusion coefficient of Zn at 800°C, is comparable to that of Ti at 1200°C. The resulting waveguides support both ordinary and extraordinary modes of polarization. The low temperature diffusion slows out diffusion and has been shown to be advantageous for making low-loss optical waveguides in LiTaO3
Keywords :
diffusion in solids; integrated optics; lithium compounds; optical waveguides; zinc; 6 h; 800 degC; LiTaO3:Zn; diffusion properties; optical properties; optical waveguides; planar waveguides; polarisation modes; Diffusion processes; Optical films; Optical planar waveguides; Optical polarization; Optical sensors; Optical waveguides; Planar waveguides; Substrates; Temperature; Zinc;
Journal_Title :
Lightwave Technology, Journal of
