Fiber optic directional coupler
Patent 4601541 Issued on July 22, 1986. Estimated Expiration Date: 
October 21, 2003. 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.
October 21, 2003. 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 ReferencesDistributive tee coupler Apparatus for generating light pulse train Interferometer with a single-mode waveguide coil Fiber optic transceiver and full duplex point-to-point data link Optical fiber launch coupler Coupled communications fibers Method of fabrication of fiber optic coupler Patent #: 4431260 InventorsAssigneeApplicationNo. 06/544079 filed on 10/21/1983US Classes:385/30, Evanescent wave coupling359/900, METHODS385/42, Directional coupler385/51, Permanently fixed coupler451/41, Glass or stone abrading65/61With wearing away of surface material (e.g., abrading or grinding)ExaminersPrimary: Lee, John D.Attorney, Agent or FirmInternational ClassesG02B 6/28 (20060101)G02B 6/35 (20060101) AbstractApparatus and method of manufacture for coupling optical power between two strands of fiber optic material in a given direction of propagation. The coupler employs generally parallel, intersecting strands of fiber optic material having the cladding removed on one side thereof to within a few microns of the fiber cores in the region of intersection to permit light transfer between the strands.Other References
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