Abstract

We present a theoretical model to calculate the coupling constant of a diffused channel-waveguide directional coupler, taking into account the variation of refractive index both along the surface and perpendicular to the surface of the waveguide. We discuss the theoretical dependence of the coupling length on various fabrication parameters. The results show good agreement with the experimental data for a Ti-diffused LiNbO₃ directional coupler.

© 1982 Optical Society of America

Design calculations for directional couplers fabricated by Ti-diffused LiNbO₃ waveguides

Juichi Noda, Masaharu Fukuma, and Osamu Mikami
Appl. Opt. 20(13) 2284-2290 (1981)

Variational analysis of diffused planar and channel waveguides and directional couplers

Anurag Sharma and Pushpa Bindal
J. Opt. Soc. Am. A 11(8) 2244-2248 (1994)

Comparison of calculated and measured performance of diffused channel-waveguide couplers

M. D. Feit, J. A. Fleck, and L. McCaughan
J. Opt. Soc. Am. 73(10) 1296-1304 (1983)

Coupling characteristics of LiNbO₃ directional couplers

Craig T. Mueller and Elsa Garmire
Appl. Opt. 24(17) 2846-2850 (1985)

Analysis of optical channel waveguides and directional couplers with graded-index profile

Toshiaki Suhara, Yuichi Handa, Hiroshi Nishihara, and Jiro Koyama
J. Opt. Soc. Am. 69(6) 807-815 (1979)