Vector coupled-mode theory is extended beyond the conventional first-order treatment. Good results are obtained from the extended theory in the case of waveguides with large index discontinuity.
© 1989 Optical Society of America
Original Manuscript: May 19, 1988
Manuscript Accepted: July 26, 1989
Published: November 1, 1989
H. A. Haus, A. W. Snyder, and W. P. Huang, "Coupled-mode formulations," Opt. Lett. 14, 1222-1224 (1989)