Abstract

This paper summarizes research that was done to determine the modes in rib waveguides with complex dielectrics. The general method of computation is the product method used by Bradley and Kellner.¹ The calculations can be carried out by using complex algebra in the product method so that no substantial changes occur in the procedure except for dielectric interfaces. We derive the results appropriate for treating complex dielectric interfaces and report results of these calculations that characterize the active region in a waveguide modulator.

© 1990 Optical Society of America