Optical wavelength demultiplexing filter for passing a selected one of a plurality of optical wavelengths
Patent 5408319 Issued on April 18, 1995. Estimated Expiration Date: 
September 1, 2012. 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.
September 1, 2012. 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 ReferencesHigh speed light modulator using multiple quantum well structures Apparatus comprising a monolithic nonlinear Fabry-Perot etalon, and method for producing same Bistable liquid crystal in a fabry-perot etalon Interferometric device having a controllable Fabry-Perot Electronically tunable polarization-independent liquid crystal optical filter Patent #: 5068749 InventorsApplicationNo. 938964 filed on 09/01/1992US Classes:356/480, Resonant cavity219/201Combined with diverse-type art deviceExaminersPrimary: Turner, Samuel A.Assistant: Kim, Robert H. Attorney, Agent or FirmInternational ClassG01B 009/02AbstractA method and apparatus for selecting an optical wavelength is provided incorporating a layer of silicon with two juxtaposed partially-reflective mirrors to provide a Fabry-Perot cavity and ohmic contacts to the silicon layer for heating the silicon layer to provide a temperature change to change its index of refraction. The invention overcomes the problem of mechanically tuning a Fabry-Perot cavity for wavelength division multiplexing (WDM). | |
