Patents by Inventor Frederik Willem Willems

Frederik Willem Willems has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Robust multi-wavelength optical fiber communication systems
    Patent number: 6043928
    Abstract: In an optically amplified multi-wavelength optical fiber communication system, deleterious effects due to channel addition/removal can be reduced or avoided if the optical amplifiers are "overpumped", that is to say, the system is selected such that at least 70%, preferably 90% or more, of the pump power that is introduced into the amplifier fiber is unabsorbed in the amplifier fiber.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: March 28, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Kenneth Lee Walker, Frederik Willem Willems
  • Optical transmitter having pre-modulation amplification
    Patent number: 6023362
    Abstract: In one embodiment, an optical transmitter, which has a modulator disposed between an pair of optical amplifiers, exhibits reduced carrier-to-noise ratio and relatively high powers. In another embodiment, an optical amplifier is disposed between the laser carrier source and the modulator, but the post-modulator amplifier is omitted. Application of the transmitters to analog systems (e.g., CATV) and digital systems is described.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: February 8, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Kenneth Lee Walker, Frederik Willem Willems