Numerical study of inhomogeneous optical waveguide problems using predictor-corrector method

The predictor-corrector method is used for the study of the inhomogeneous optical waveguide problems. Its accuracy and efficiency have been tested with the inhomogeneous slab waveguide with a finite homogeneous cladding, and compare favourably with the Runge-Kutta and collocation methods, more than halving the computing time for the former. The method also correctly brings out the field behaviour at a caustic.