Abstract

Analysis of a directional coupler by use of rigorous coupled-mode theory is presented. The coupling process is explained by the mutual coupling of modes of a single waveguide that is due to the presence of the other waveguide. It is explicitly shown by example that the radiation modes that take part in the coupling are just those needed to form the guided modes of the composite double-guide structure.

© 1994 Optical Society of America

Coupled-mode analysis of polarization-splitting directional coupler

K. Yasumoto, N. Matsueda, and M. Ishii
J. Opt. Soc. Am. A 11(8) 2249-2256 (1994)

Coupled-mode analysis of power-transfer characteristics in a three-waveguide nonlinear directional coupler

K. Yasumoto, N. Mitsunaga, and H. Maeda
J. Opt. Soc. Am. B 13(3) 621-627 (1996)

Coupled-mode analysis of wavelength filtering in a grating-assisted asymmetric three-waveguide directional coupler

K. Watanabe and K. Yasumoto
J. Opt. Soc. Am. A 14(11) 2994-3000 (1997)

Prediction of coupling length in a rectangular-core directional coupler: an accurate analysis

Arun Kumar, A. N. Kaul, and A. K. Ghatak
Opt. Lett. 10(2) 86-88 (1985)

2 × 2 single-mode zero-gap directional-coupler thermo-optic waveguide switch on glass

Chin C. Lee and Tzu J. Su
Appl. Opt. 33(30) 7016-7022 (1994)