Theoretical study of amplitude and phase filtering of guided waves

The design of integrated optics filters by use of refinement software based on the Abeles thin-film computation method and the film mode matching method is studied. The results obtained with the two computation methods are compared. Good agreement is obtained provided that the fill factor of the guided mode in the component is high and that modal losses between waveguide sections are simulated by absorption with the Abeles computation method. Integrated optics devices that manage either the amplitude of guided waves such as a dense wavelength division multiplexing narrow-bandpass filter and a gain-flattening filter or the phase of guided waves such as a broadband dispersion compensator are presented and their optical performance is discussed. OCIS codes: 230.7390, 130.3120, 130.1750.