A vectorial coupled mode theory is used to analyze sol-gel ridge waveg
uides with UV-light-imprinted Bragg gratings. The effect of device par
ameters on the grating reflectivity is investigated. It is shown that
100% reflectivity for both TE and TM modes can be achieved using short
(1 to 2 mm) gratings. The measured reflectivity in a ridge waveguide
with a grating agrees with the theoretical predictions for TE and TM m
odes. (C) 1998 Society of Photo-Optical Instrumentation Engineers.