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Proceedings Paper

Comparison of characterization of proton-exchanged waveguides in Y-cut MgO:LiNbO3 and Z-cut LiNbO3
Author(s): Yang Yi; Pinghe Wang; Jianguo Fan; Shouyu Lou; Xianfeng Chen; YuXing Xia
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Paper Abstract

Proton-exchanged waveguides of Y-cut MgO: LiNbO3 and Z-cut LiNbO3 are fabricated in benzoic acid. The effective refractive indices of guide modes are measured by prism coupling method at 632.8 nm. The refractive index profiles are obtained by the inverse WKB method and the surface refractive index increments are calculated. The results show that the waveguides have the linear-step index profiles and the slope coefficient of the profile for Y-cut MgO: LiNbO3 is much smaller than that of Z-cut LiNbO3 and indicate that the index profile of Y-cut MgO: LiNbO3 waveguides is more like step. The theoretical mode indices are obtained on the basis of the dispersion equations with the simple step and linear- step index profiles respectively. It is found that the linear- step profile is more accurate. The effective diffusion coefficients, diffusion constant and activation energy are achieved with the diffusion law finally.

Paper Details

Date Published: 3 October 2000
PDF: 5 pages
Proc. SPIE 4220, Advanced Photonic Sensors: Technology and Applications, (3 October 2000); doi: 10.1117/12.401696
Show Author Affiliations
Yang Yi, Shanghai Jiao Tong Univ. (China)
Pinghe Wang, Shanghai Jiao Tong Univ. (China)
Jianguo Fan, Shanghai Jiao Tong Univ. (China)
Shouyu Lou, Shanghai Jiao Tong Univ. (China)
Xianfeng Chen, Shanghai Jiao Tong Univ. (China)
YuXing Xia, Shanghai Jiao Tong Univ. (China)


Published in SPIE Proceedings Vol. 4220:
Advanced Photonic Sensors: Technology and Applications
Jinfa Tang; Chao-Nan Xu; Haizhang Li, Editor(s)

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