Title :
A TE-TM mode splitter in LiNbO3 by proton exchange and Ti diffusion
Author :
Goto, Nobuo ; Yip, Gar Lam
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
fDate :
10/1/1989 12:00:00 AM
Abstract :
A TE-TM mode splitter using branching waveguides made by proton exchange (PE) and Ti indiffusion (TI) in Z-cut LiNbO3 is proposed and designed using the coupled mode theory. The TE-TM mode splitting was experimentally verified, and extinction ratios of 20 dB and more than 20 dB were successfully achieved for TM and TE modes, respectively. The effective index of the PE waveguide was controlled through the PE and postannealing time at fixed temperatures. An equivalent device for two-way communication is suggested and discussed theoretically
Keywords :
diffusion in solids; integrated optics; ion exchange; lithium compounds; optical waveguides; optical workshop techniques; titanium; LiNbO3:Ti; TE-TM mode splitter; Ti diffusion; Z-cut LiNbO3; branching waveguides; coupled mode theory; effective index; extinction ratios; fixed temperatures; postannealing time; proton exchange; two-way communication; Integrated optics; Optical devices; Optical fiber sensors; Optical propagation; Optical sensors; Optical waveguides; Polarization; Protons; Tellurium; Temperature sensors;
Journal_Title :
Lightwave Technology, Journal of
