Optical waveguide transmission devices
July 14, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSingle-mode wavelength division optical multiplexer Planar star coupler device for fiber optics Optical multiplexer/demultiplexer Periodic array with a nearly ideal element pattern Optical switch, multiplexer, and demultiplexer Hybrid thin film optical waveguide structure having a grating coupler and a tapered waveguide film Planar waveguide having optimized bend Efficient reflective multiplexer arrangement Frequency routing device having a spatially filtered optical grating for providing an increased passband width Optical fiber system using tapered fiber devices InventorsApplicationNo. 616487 filed on 07/14/2000US Classes:385/37, Grating385/24, Plural (e.g., data bus)385/43, Tapered coupler385/46Star couplerExaminersPrimary: Sanghavi, HemangAssistant: Rojas, Omar Jr. Attorney, Agent or FirmForeign Patent References
International ClassesG02B 006/34G02B 006/28 AbstractAn optical waveguide device comprising a free space region, suitably provided by a slab waveguide, having optical signal ports for coupling to input and output waveguide sections and an optical waveguide grating including an array of grating waveguides coupling the free space region to a reflector surface to provide a folded structure. Dielectric waveguide structures are preferred. The grating includes tapered optical waveguide sections laterally spaced and optically isolated from each other which extend from the free space region, with the grating waveguides continuing as extensions of the tapered waveguide sections. Each of the grating waveguides differs in length from a neighboring grating waveguide by a constant increment, preferably an optical path length increment. The grating waveguides also include intermediate curved portions having respective curvatures which increase progressively, preferably in an approximately parabolic manner, according to the sequential location of the grating waveguides from a reference grating waveguide in the array.Other References
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