COMPOUND OPTICAL WAVEGUIDE AND FILTER APPLICATIONS THEREOF

摘要

A compound waveguide device (10) having a channel waveguide (60) in optical proximity to an elongate waveguide (30) propagating an optical signal therein is disclosed. The channel waveguide (60) includes a coupling surface through which optical energy is evanescently coupled to or from the optical signal propagating in the elongate waveguide (30). The channel waveguide (60) is shaped to confine distribution of the optical energy therein along axes transverse to the axis of propagation of the optical energy. Transverse diffraction of the optical energy within the channel waveguide (60) is thereby limited. In one embodiment, the elongate waveguide (30) is a side-polished fiber optic waveguide. Electro-optic control of the compound waveguide is disclosed, as are bandstop, bandpass and detection configurations thereof.