Mode Field Analysis of High-pass Filtering Characteristics in Planar Optical Waveguides
The distribution of guided modes and transmission characteristics in planar optical waveguides is analyzed using two methods:geometrical optics and wave optics.The mode field distribution within the same waveguide is accurately calculated by exciting it with light waves at different wavelengths,employing the two-dimensional time-domain finite difference method.The results indicate that light wave energy continuously leaks out and diminishes over time;additionally,longer wavelengths result in faster energy leakage,even when the total reflection condition is satisfied in the fundamental mode.This phenomenon reflects the high-pass filter characteristics of planar optical waveguides.
planar optical waveguidehigh-pass filteringfinite-difference time-domainmode field
万方数据
维普
