Patents by Inventor Nigel E Jolley

Nigel E Jolley 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 amplifiers
    Patent number: 6275331
    Abstract: In a WDM optical transmission system employing optical amplifiers in its transmission path, a supervisory signal channel, used for monitoring and controlling the operation of the amplifiers and spectrally separated from the data transmission, may be multiplexed with the data. A construction of amplifier is disclosed which is capable of being upgraded with an upgrade of the transmission system to include additional data handling capacity, for instance data transmission in an additional waveband and/or in the opposite direction, without interruption of the pre-upgrade data transmission path through the amplifiers. This is accomplished by the use of channel dropping and insertion filters disposed so that the amplifying data transmission path extends via the drop/insertion channel of those filters.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: August 14, 2001
    Assignee: Nortel Networks Limited
    Inventors: Kevan P Jones, Roger M Gibb, Robert A Baker, Martin P Poettcker, Mark E Bray, Barrie Flintham, James Regan, Toby J Reid, Alan A Solheim, Robert W Keys, Mark R Hinds, Joseph Mun, Nigel E Jolley, Alan Robinson, Jonathan P King, Simon P Parry
  • Pump wavelength tuning of optical amplifiers and use of same in wavelength division multiplexed systems
    Patent number: 6144486
    Abstract: The variables and parameters previously understood to affect the gain spectrum of an optical amplifier 13 were: (1) the wavelengths to be amplified; (2) the input power levels at those wavelengths; (3) the characteristics of the amplifying medium 20; (4) the insertion loss spectra of the amplifier's components, including any filter(s) used for gain flattening; (5) the pump band chosen to pump the amplifying medium 20; and (6) the total amount of pump power supplied in the chosen pump band. An additional fundamental variable has been identified which can be used to control the gain spectrum of an optical amplifier 13, namely, the center wavelength of the spectrum of the pump's output power within the chosen pump band. Methods and apparatus for using this variable for this purpose are disclosed.For example a, transmission system is disclosed having a transmitter 11 and a receiver 10 connected by an optical fiber 12.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: November 7, 2000
    Assignees: Corning Incorporated, Northern Telecom Limited
    Inventors: Kevin W. Bennett, Fiona Davis, Richard A. Habel, Paul A. Jakobson, Nigel E. Jolley, Robert W. Keys, Kim Byron Roberts, Mark A. Newhouse, Michael J. Yadlowsky