Wavelength power equalization by attenuation in an optical switch
Patent 6697547 Issued on February 24, 2004. Estimated Expiration Date: 
May 14, 2021. 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.
May 14, 2021. 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 ReferencesAttenuation device for wavelength multiplexed optical fiber communications Optical add/drop multiplexer/demultiplexer Fault-tolerant fiber-optical beam control modules Optical switching system with power balancing Patent #: 6445843 InventorsApplicationNo. 09/855765 filed on 05/14/2001US Classes:385/16, Switch (i.e., switching from one terminal to another, not modulation)385/140, Attenuator385/18, Reflective-type switch398/38PowerExaminersPrimary: Glick, Edward J.Assistant: Barber, Therese Attorney, Agent or FirmInternational ClassesG02B 6/26 (20060101)G02B 6/35 (20060101) H04Q 11/00 (20060101) AbstractA method for equalizing optical signal power in a group of optical signals transmitted through an optical switch in an optical transmission system. In one embodiment a group of optical signals is input into an optical switch having at least one movable mirror array with a plurality of reflectors formed thereon, the optical beam being directed onto a selected at least one reflector and wherein attenuating the optical beam is accomplished by controllably detuning at least one of the selected at least one reflector to attenuate the optical beam.Other References
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