Optical fiber telecommunication system
June 4, 2017. 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 ReferencesLow noise high power optical fiber amplifier Hybrid pumping arrangement for doped fiber amplifiers Fiber amplifier with multiple pumps Erbium-doped fiber amplifier and an optical fiber communication system Article comprising hybrid optical fiber amplifier Amplified telecommunication system for wavelength-division multiplexing transmission having an equalized reception power Patent #: 5852510 InventorAssigneeApplicationNo. 090405 filed on 06/04/1997US Classes:398/157, Including pumping359/341.33, With multiple systems359/345, Particular pumping type (e.g., electrical, optical, nuclear, magnetic, etc.)398/1, FAULT RECOVERY398/180Specific optical elementsExaminersPrimary: Negash, Kinfe-MichaelAttorney, Agent or FirmForeign Patent References
International ClassH04B 010/00Foreign Application Priority Data1997-06-06 EPAbstractThe present invention relates to an optical fiber telecommunications system and more in particular to an optical telecommunications system having a high loss transmission line. The optical fiber telecommunications system includes a transmission station producing at least one transmission signal in a predetermined wavelength band carrying the information, a receiving station for receiving said transmission optical signal, an optical fiber line connecting the transmission station and the receiving station, and at least one optical fiber amplifier connected along the line for amplifying the transmission optical signal, the amplifier having a total optical output power greater than 20 dBm. The fiber optic amplifier for amplifying a transmission signal including a first stage and a second stage, an isolator placed between the first stage and the second stage where the second stage includes an erbium doped fiber, pump means including two pump sources at different wavelengths in a second stage pump wavelength band, A WDM coupling means coupling the different wavelengths as a composite second stage pump signal, and a coupler coupling the composite second stage pump signal and the transmission optical signal to the erbium doped fiber.Other References
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