Patents by Inventor Roy C. Litz

Roy C. Litz 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).

  • Patent number: 9191117
    Abstract: The present disclosure provides high-speed wavelength division multiplexing (WDM) transponders (e.g., 10 Gb/s, 40 Gb/s, 100 Gb/s, and beyond) that receive one or more optical signals and convert and/or remodulate the received optical signals onto a newly generated optical channel along with overhead processing/addition, forward error correction, and the like. In general, the transponders of the present invention include a client-side and a line-side, each with bi-directional optical transmission. The transponders provide an effective mechanism to support WDM networks that are transparent to the client-side.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: November 17, 2015
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Michael Y. Frankel, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 8306424
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: November 6, 2012
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Publication number: 20110013911
    Abstract: The present disclosure provides high-speed wavelength division multiplexing (WDM) transponders (e.g., 10 Gb/s, 40 Gb/s, 100 Gb/s, and beyond) that receive one or more optical signals and convert and/or remodulate the received optical signals onto a newly generated optical channel along with overhead processing/addition, forward error correction, and the like. In general, the transponders of the present invention include a client-side and a line-side, each with bi-directional optical transmission. The transponders provide an effective mechanism to support WDM networks that are transparent to the client-side.
    Type: Application
    Filed: September 23, 2010
    Publication date: January 20, 2011
    Inventors: Stephen B. Alexander, Michael Y. Frankel, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Publication number: 20100329682
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Application
    Filed: August 24, 2010
    Publication date: December 30, 2010
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 7809270
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: October 5, 2010
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Publication number: 20090041471
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Application
    Filed: April 8, 2008
    Publication date: February 12, 2009
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 7369780
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: May 6, 2008
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Publication number: 20040013433
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Application
    Filed: July 15, 2003
    Publication date: January 22, 2004
    Applicant: CIENA Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 6618176
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: September 9, 2003
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 6344915
    Abstract: The present invention provides a system and method for intelligently shutting down an optical energy source in a communication system having optical amplifiers upon detection of a system failure.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: February 5, 2002
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Cecil D. Smith, Roy C. Litz, Robert M. Corwin, John L. Shanton, III, Donald T. Newman
  • Publication number: 20010013964
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Application
    Filed: February 26, 2001
    Publication date: August 16, 2001
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 6233077
    Abstract: The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selected signal onto a newly-generated optical output signal. The wavelength of the output optical signal can be the same as or different from one of the optical channels which comprises the WDM input signal. When used in a WDM optical communication system with remodulators at the transmission input, the remodulating selectors provide complete control over the interfaces with optical transmitters and receivers, permitting use with a broad range of optical equipment.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: May 15, 2001
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith