Title :
Theoretical analysis of guided mode and effective refractive index at 1.53 μm in Ti:LiNbO3 strip waveguides
Author :
Zhang, Delong ; Ding, Guilan ; Chen, Caihe
Author_Institution :
Dept. of Opto-Electron. Inf. Eng., Tianjin Univ., China
fDate :
3/1/1998 12:00:00 AM
Abstract :
An analysis of guided modes and effective refractive indexes in c-cut Ti-diffused LiNbO3 strip waveguides has been performed at the wavelength 1.53 μm by the variational method. Dependences of mode size and effective refractive index on initial Ti-strip width W, diffusion temperature T and initial Ti-strip thickness H have been calculated for several lower order modes. As compared the plots of the mode size with the previous published experimental results, an agreement in general behavior has been obtained. The single-mode and cutoff conditions were discussed numerically, which are very useful in optimizing and designing the Er:Ti:LiNbO3 waveguide devices. In addition, several advantages of 1.48 μm pumping were summarized
Keywords :
diffusion; lithium compounds; optical design techniques; optical waveguide theory; optical waveguides; optimisation; refractive index; titanium; μm pumping; 1.48 mum; 1.53 mum; LiNbO3:Ti; Ti:LiNbO3 strip waveguides; c-cut Ti-diffused LiNbO3 strip waveguides; cutoff conditions; diffusion temperature; effective refractive index; guided mode; guided modes; initial Ti-strip width; mode size; theoretical analysis; variational method; Fiber nonlinear optics; Laser mode locking; Laser theory; Nonlinear optics; Optical refraction; Optical variables control; Optical waveguides; Refractive index; Strips; Waveguide lasers;
Journal_Title :
Lightwave Technology, Journal of
