A four-port device, consisting of a codirectional coupler with a grating overlay, is analyzed using four-wave coupled-wave theory. Both fully synchronous and asynchronous cases are treated, and the results from the coupled-wave analysis are then related to modal analysis. The implications of the results for both active and passive devices based round the same geometry are then discussed.
© 1985 Optical Society of America
Original Manuscript: September 28, 1984
Published: March 1, 1985
R. R. A. Syms, "Optical directional coupler with a grating overlay," Appl. Opt. 24, 717-726 (1985)