Title :
Optical mode size control by MgO indiffusion in Ti:LiNbO3 waveguides
Author :
Jayantha, Y.V.D. ; Mitchell, Arhan ; Austin, Michael W.
Author_Institution :
Sch. of Electr. & Comput. Eng., RMIT Univ., Melbourne, Vic., Australia
Abstract :
In this paper, the use of magnesium oxide (MgO) indiffusion in combination with Ti:LiNbO3 through appropriate control of pre- and post-diffusion parameters is investigated as a way of controlling optical mode size. The co-diffusion of pre-patterned Ti with various patterned MgO films on LiNbO3 has been compared experimentally. This method has been applied to study straight waveguides and couplers. The waveguides were optically characterized by near-field mode size and loss measurements methods at a wavelength of 1.55 μm. Reduction of inter-mode coupling between adjacent waveguides with the introduction of MgO has been observed.
Keywords :
chemical interdiffusion; coupled mode analysis; lithium compounds; magnesium compounds; optical waveguides; titanium; 1.55 mum; LiNbO3:Ti,MgO; MgO indiffusion; Ti:LiNbO3 waveguides; co-diffusion; inter-mode coupling reduction; optical mode size control; Couplers; Loss measurement; Magnesium oxide; Optical control; Optical films; Optical losses; Optical waveguides; Size control; Size measurement; Wavelength measurement;
Conference_Titel :
Optoelectronic and Microelectronic Materials and Devices, 2002 Conference on
Print_ISBN :
0-7803-7571-8
DOI :
10.1109/COMMAD.2002.1237313
