Broad wavelength range single mode integrated optics device

摘要

An optical circuit element for processing single mode light. The element is of the type that includes input and output waveguides that communicate with an intermediate waveguide network. The input and output waveguides are designed to support only the fundamental mode of light throughout a predetermined optical wavelength range while the waveguides of the intermediate waveguide network can support higher order modes. By maintaining adiabatic optical path transitions throughout the element, cross-coupling between the fundamental and higher order modes is avoided so that broad wavelength range single mode signal processing is achieved.