Title :
Calculation of extraordinary refractive index change in proton-exchanged LiTaO3 waveguides
Author :
Pun, E.Y.B. ; Hou, W.X. ; Chow, Yew Tuck ; Chung, Pil Seung
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Hong Kong
Abstract :
A theoretical index model for the extraordinary refractive index increase in proton-exchanged LiTaO3 is presented. The index change is caused by two factors: the change in spontaneous polarisation and the change due to the photoelastic effect caused by the lattice volume expansion. Close agreement is obtained between quantitative calculation based on the proposed model and experimental data.
Keywords :
integrated optics; light polarisation; lithium compounds; optical waveguides; photoelasticity; refractive index; LiTaO 3; index model; lattice volume expansion; photoelastic effect; proton-exchanged optical waveguide; refractive index change; spontaneous polarisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930972
