Optical wavelength conversion using four wave mixing in fiber
Patent 6330104 Issued on December 11, 2001. Estimated Expiration Date: 
August 11, 2019. 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.
August 11, 2019. 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 ReferencesPolarization-insensitive optical four-photon mixer with orthogonally-polarized pump signals Apparatus and method for compensating chromatic dispersion produced in optical phase conjugation or other types of optical signal conversion Device for and method of modifying the spectral characteristics of optical signals Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers Patent #: 6101024 InventorsApplicationNo. 371989 filed on 08/11/1999US Classes:359/332, Dielectric optical waveguide type359/327, Raman type359/330Parametric oscillatorExaminersPrimary: Lee, John D.Attorney, Agent or FirmInternational ClassG02F 001/365AbstractA wavelength conversion apparatus and method uses four wave mixing of a first wavelength and a control wavelength in an optical fiber to convert the first wavelength to a desired wavelength. Four wave mixing is produced by operating the optical fiber at a predetermined input power density and by using a fiber length which provides substantial Raman gain. The first wavelength is converted to a higher wavelength by using the higher wavelength four wave mixing signal and converted to a lower wavelength by using the lower wavelength four wave mixing signal.Other References
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