Proposal for acousto-optic tunable filters with near-ideal bandpass characteristics.

A scheme for achieving near-ideal-filter characteristics in the acousto-optic-tunable-filter design is proposed. When applied to bandpass filter applications, the proposed scheme should produce a filter thatis far superior to those from conventional designs in terms of such ideal-filter characteristics as a flat top and no sidelobes, which are of immense importance in the optical-frequency-division-multiplexing scheme of optical-communication network systems.