Patents by Inventor William Dautremont-Smith

William Dautremont-Smith 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).

  • Optical communication system with co-propagating pump radiation for raman amplification
    Patent number: 6384963
    Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pump source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump source characteristics, sufficient optical gain can be achieved in the co-propagating arrangement, the characteristics including: (1) using an optical pump power of at least 50 mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pump laser frequency and the signal frequency, and all intense longitudinal modes between different pump lasers being separated by at least the electrical bandwidth of the communication system.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: May 7, 2002
    Assignee: Lucent Technologies Inc.
    Inventors: David Ackerman, Kenneth L. Bacher, William Dautremont-Smith, Mei Du, Karsten Rottwitt, Andrew John Stentz, Thomas A. Strasser, Liming Zhang
  • Optical communication system with co-propagating pump radiation for raman amplification
    Publication number: 20010036004
    Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pump source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump source characteristics, sufficient optical gain can be achieved in the co-propagating arrangement, the characteristics including: (1) using an optical pump power of at least 50 mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pump laser frequency and the signal frequency, and all intense longitudinal modes between different pump lasers being separated by at least the electrical bandwidth of the communication system.
    Type: Application
    Filed: January 25, 2001
    Publication date: November 1, 2001
    Inventors: David Ackerman, Kenneth L. Bacher, William Dautremont-Smith, Mei Du, Karsten Rottwitt, Andrew John Stentz, Thomas A. Strasser, Liming Zhang