Title :
Low-loss Ti:LiNbO3-waveguide bends prepared by MgO indiffusion
Author :
Majd, Mohammad ; Schüppert, Bernd ; Petermann, Klaus
Author_Institution :
Inst. fuer Hochfrequenztech., Tech. Univ., Berlin, West Germany
fDate :
11/1/1990 12:00:00 AM
Abstract :
A significant bend loss reduction for z-cut Ti:LiNbO3 waveguides was achieved with a single and very efficient technique. The refractive index on the outer sides of an S bend was decreased through indiffusion of a double-MgO layer for reducing the radiation losses, and a broadening of the bent waveguide sections was used for further decreasing of the radiation losses and additionally reducing the transition losses. The acceptable bend radius for an allowed excess loss of 1 dB could thus be reduced from 24 mm down to 5 mm for TM polarization and from 26 mm down to 10 mm for TE polarization
Keywords :
lithium compounds; optical losses; optical waveguides; optical workshop techniques; refractive index; titanium; 1 dB; MgO indiffusion; S bend; TE polarization; TM polarization; bend loss reduction; bend radius; broadening; double-MgO layer; low loss LiNbO3:Ti waveguide bends; radiation losses; refractive index; transition losses; z-cut Ti:LiNbO3 waveguides; Integrated optics; Optical materials; Optical polarization; Optical waveguides; Refractive index; Semiconductor materials; Semiconductor waveguides; Tellurium; Waveguide discontinuities; Waveguide transitions;
Journal_Title :
Lightwave Technology, Journal of
