We report measurements of the guided-wave reflectivity of a periodic, surface-corrugation, waveguide grating as a function of incidence angle and polarization. We show that the measured response is more accurately described by a coupled-mode theory based on the local-normal-mode expansion of the fields than by that based on the ideal-mode expansion.
© 1987 Optical Society of America
Original Manuscript: May 19, 1987
Manuscript Accepted: June 30, 1987
Published: September 1, 1987
L. A. Weller-Brophy and D. G. Hall, "Measured TM–TM coupling in waveguide gratings," Opt. Lett. 12, 756-758 (1987)