Patents by Inventor Cecil D. Smith

Cecil D. 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).

  • 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
  • Patent number: 7903981
    Abstract: The present invention provides a software-based electro-optic modulator bias control system resident in an optical transceiver including an electro-optic modulator that includes an optical-to-electrical converter including a transimpedance amplifier, an analog-to-digital converter, and a software algorithm, wherein the software algorithm is operable for determining an optimum bias voltage applied to the electro-optic modulator by discovering a maximum average optical power transmitted by the electro-optic modulator, or quadrature point, wherein the quadrature point is discovered by determining at what bias voltage the slope of an average optical power transmitted by the electro-optic modulator, defined as an optical power change given an incremental bias voltage change, is equal to zero.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: March 8, 2011
    Assignee: Ciena Corporation
    Inventors: Steve S. Cho, 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
  • Publication number: 20080175598
    Abstract: The present invention provides a software-based electro-optic modulator bias control system resident in an optical transceiver including an electro-optic modulator that includes an optical-to-electrical converter including a transimpedance amplifier, an analog-to-digital converter, and a software algorithm, wherein the software algorithm is operable for determining an optimum bias voltage applied to the electro-optic modulator by discovering a maximum average optical power transmitted by the electro-optic modulator, or quadrature point, wherein the quadrature point is discovered by determining at what bias voltage the slope of an average optical power transmitted by the electro-optic modulator, defined as an optical power change given an incremental bias voltage change, is equal to zero.
    Type: Application
    Filed: January 23, 2007
    Publication date: July 24, 2008
    Inventors: Steven S. Cho, 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
  • Patent number: 5784184
    Abstract: The present invention provides a WDM optical communication system with remodulators at the transmission input and remodulating channel selectors adjacent the optical receivers, providing complete control over the interfaces with optical transmission equipment. In an exemplary embodiment, the WDM system includes optical transmitters which input transmitted optical signals into optical remodulators. The optical remodulators place the information from each of the transmitted signals onto separate optical channels in the WDM system channel plan. The optical channels are multiplexed onto an optical waveguide. At the receive end, remodulating channel selectors each receive a portion of the WDM optical signal, select a particular optical channel, and place the information from the selected channel onto a newly-generated optical signal. This newly-generated optical signal is output to a receiver or to a further WDM optical system.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: July 21, 1998
    Assignee: CIENA Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy Litz, Cecil D. Smith
  • Patent number: 5726784
    Abstract: A WDM optical communication system is described which is capable of placing information from incoming information-bearing optical signals onto N optical signal channels for conveyance over an optical waveguide. The optical system includes a first set of one or more optical transmitters, each of which emits an information-bearing optical signal at one or more transmission wavelengths, .lambda..sub.Ti. At least M optical receiving systems are provided, each receiving system configured to receive an information-bearing optical signal at a particular reception wavelength .lambda..sub.j, where M is a whole number greater than or equal to N and j is from 1 to M. Each receiving system includes at least one Bragg grating member for selecting the particular reception wavelength .lambda..sub.j. An optical waveguide optically communicates with each of the M receiving systems for transmitting a plurality of optical signals.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: March 10, 1998
    Assignee: Ciena Corp.
    Inventors: Stephen B. Alexander, Steve W. Chaddick, David R. Huber, Cecil D. Smith
  • Patent number: 5715076
    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: June 24, 1996
    Date of Patent: February 3, 1998
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, Roy Litz, Cecil D. Smith
  • Patent number: 5504609
    Abstract: The present invention provides an optical communication system capable of placing incoming information-bearing optical signals onto plural optical signal channels for transmission over an optical waveguide. The optical system includes plural optical transmission elements, each transmission element emitting an information-bearing optical signal at a first transmission wavelength. Plural optical receiving systems are provided, each receiving system configured to receive an information-bearing optical signal at a particular reception wavelength. Each receiving system includes an optical filtering member comprising at least one Bragg grating member for selecting the particular reception wavelength. An optical waveguide optically communicates with each of the receiving systems for transmitting a plurality of optical signals. A plurality of optical amplifiers are positioned along the optical waveguide for amplifying plural optical signals simultaneously.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: April 2, 1996
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Steve W. Chaddick, David R. Huber, Cecil D. Smith
  • Patent number: 4475676
    Abstract: This device is a clip having a mouth on opposite sides, one for clipping to a supporting object, and the other for a plurality of golf ball markers being clipped therein, and one of the clip sides including bent-up tongues, behind which golf ball tees are clipped.
    Type: Grant
    Filed: April 27, 1983
    Date of Patent: October 9, 1984
    Inventor: Cecil D. Smith