Patents by Inventor Nigel R Wood

Nigel R Wood 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).

  • Burst mode wavelength manager
    Patent number: 6366372
    Abstract: An optical network operating with burst mode data traffic signal comprises a recirculating optical loop memory which includes taking a sample of a burst mode data traffic signal and storing the sample within the recirculating optical loop memory. The network may further comprise a scanning based wavelength measurement system wherein the wavelength of the sample may be determined.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: April 2, 2002
    Assignee: Marconi Communications Limited
    Inventor: Nigel R Wood
  • Single sideband modulators
    Patent number: 6141141
    Abstract: An optical reference frequency generator comprises a plurality of Single Sideband Optical Frequency Shifters (SSB-OFS) wherein the SSB-OFSs are connected in pairs, each pair having a common optical frequency input and an optical shift frequency input arranged so that the output from one SSB-OFS of each pair has a positive frequency shift and the output from the other SSB-OFS has a negative frequency shift.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: October 31, 2000
    Assignee: Marconi Communications Limited
    Inventor: Nigel R Wood
  • Wavelength manager
    Patent number: 6078394
    Abstract: Scanning based wavelength measurement systems which are suitable for both localised and distributed WDM, High Density WDM, and coherent systems are based around the use of a fixed cavity Fabry-Perot Etalon which when the output of a tuneable laser is passed through it produces a number of reference equispaced transmission maxima. These maxima are used in a Scanning Heterodyne or Scanning Filter based Spectrometer for detection of the wavelength position of the transmitter.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: June 20, 2000
    Assignee: Marconi Communications Limited
    Inventor: Nigel R Wood
  • Opto-electronic circuits
    Patent number: 5461504
    Abstract: For use in a coherent optic switch a coherent optical transceiver has a single coherent receiver for both data recovery and to lock the transmitter to an optical reference input to the receiver. The switch may include polarisation control of the optical input to the receiver and wave division multiplex control of the transmitter frequency. The transmitter and receiver may be constructed as opto-electronic integrated circuits.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: October 24, 1995
    Assignee: GPT Limited
    Inventors: Peter T. Johnson, Nigel R. Wood