Patents by Inventor Fred Kish

Fred Kish 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).

  • Publication number: 20090202196
    Abstract: An optical transmitter comprises a monolithic transmitter photonic integrated circuit (TxPIC) chip that includes an array of modulated sources formed on the PIC chip and having different operating wavelengths approximating a standardized wavelength grid and providing signal outputs of different wavelengths. A wavelength selective combiner is formed on the PIC chip having a wavelength grid passband response approximating the wavelength grid of the standardized wavelength grid. The signal outputs of the modulated sources optically coupled to inputs of the wavelength selective combiner to produce a combined signal output from the combiner. A first wavelength tuning element coupled to each of the modulated sources and a second wavelength tuning element coupled to the wavelength selective combiner. A wavelength monitoring unit is coupled to the wavelength selective combiner to sample the combined signal output.
    Type: Application
    Filed: December 29, 2008
    Publication date: August 13, 2009
    Inventors: Fred A. Kish, JR., Charles H. Joyner, David F. Welch, Robert B. Taylor, Alan C. Nilsson
  • Patent number: 7570845
    Abstract: Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and a modulator (TxPIC) and in another case, may minimally include a photodetector to which channels, in either case, an AVE or an MFE may be added.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: August 4, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Fred A. Kish, Jr., Radhakrishnan L. Nagarajan, Alan C. Nilsson, Robert B. Taylor
  • Publication number: 20090175573
    Abstract: Consistent with the present disclosure, optical devices are provided along different optical paths in a photonic integrated circuit (PIC). The optical components have different optical losses associated therewith so that optical signals propagating in the optical paths have desired power levels, which may be uniform, for example.
    Type: Application
    Filed: November 1, 2008
    Publication date: July 9, 2009
    Inventors: Fred A. Kish, JR., Mehrdad Ziari, Radhakrishnan L. Nagarajan, Masaki Kato, Vincent G. Dominic, Sanjeev Murthy, Alan Nilsson
  • Patent number: 7555220
    Abstract: An optical equalizer/dispersion compensator (E/CDC) comprises an input/output for receiving a multiplexed channel signal comprising a plurality of channel signals of different wavelengths. An optical amplifier may be coupled to receive, as an input/output, the multiplexed channel signals which amplifier may be a semiconductor optical amplifier (SOA) or a gain clamped-semiconductor optical amplifier (GC-SOA). A variable optical attenuator (VOA) is coupled to the optical amplifier and a chromatic dispersion compensator (CDC) is coupled to the variable optical attenuator. A mirror or Faraday rotator mirror (FRM) is coupled to the chromatic dispersion compensator to reflect the multiplexed channel signal back through these optical components The E/CDC components may be integrated in a photonic integrated circuit (PIC) chip.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: June 30, 2009
    Assignee: Infinera Corporation
    Inventors: Stephen G. Grubb, Charles H. Joyner, Frank H. Peters, Fred A. Kish, Jr., Drew D. Perkins
  • Patent number: 7551815
    Abstract: A method is disclosed for monitoring and controlling the bit error rate (BER) in an optical communication network where an optical receiver in the optical transmission network. The method includes the steps of decombining a combined channel signal received from the network and then monitoring a real time bit error rate (BER) of a decombined channel signal. The determined BER is then communicated, such as through an optical service channel (OSC) to an optical transmitter source that is the source of origin of the channel signal. Based upon the determined BER, the chirp of a channel signal modulator at the optical transmitter source that generated the monitored channel signal is adjusted by, for example, adjusting its bias. The same channel signal received at the optical receiver can be monitored again to determine if an acceptable level for the BER has been achieved by the previous chirp adjustment.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: June 23, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Ting-Kuang Chiang, Vincent G. Dominic, Fred A. Kish, Jr., Radhakrishnan L. Nagarajan
  • Patent number: 7546001
    Abstract: Monolithic photonic integrated circuits (PICs) utilize forward error correction (FEC) joint encoder or plural encoders or a joint decoder or plural decoders.
    Type: Grant
    Filed: April 14, 2007
    Date of Patent: June 9, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Radhakrishnan L. Nagarajan, Fred A. Kish, Jr., Vincent G. Dominic, Ting-Kuang Chiang
  • Patent number: 7539365
    Abstract: Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and a modulator (TxPIC) and in another case, may minimally include a photodetector to which channels, in either case, an AVE or an MFE may be added.
    Type: Grant
    Filed: February 3, 2007
    Date of Patent: May 26, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Fred A. Kish, Jr., Radhakrishnan L. Nagarajan, Alan C. Nilsson, Robert L. Taylor
  • Patent number: 7529436
    Abstract: A photonic integrated circuit that includes a plurality of active and passive components on a substrate where one of the components is an optical combiner/decombiner having at least one free space coupler region and a plurality of longitudinal ridge waveguides each extending in the circuit from a first region of the waveguide and coupled at a second region of the waveguide at the free space coupler region. A first dielectric layer formed over the ridge waveguides and the free space coupler region. The first dielectric layer monotonically increases in cross-sectional thickness from the waveguide first region to the second region to reduce signal insertion losses in transitioning from the ridge waveguides to the free space coupler region. The first dielectric layer may be covered with a second passivation layer. The first dielectric layer may be SiOx, SiNx or SixONy and the second passivation layer may be BCB, ZnS or ZnSe.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: May 5, 2009
    Assignee: Infinera Corporation
    Inventors: Charles H. Joyner, Mark J. Missey, Radhakrishnan L. Nagarajan, Fred A. Kish, Jr.
  • Patent number: 7526150
    Abstract: Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and a modulator (TxPIC) and in another case, may minimally include a photodetector to which channels, in either case, an AVE or an MFE may be added.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: April 28, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Fred A. Kish, Jr., Radhakrishnan L. Nagarajan, Alan C. Nilsson, Robert B. Taylor
  • Patent number: 7519246
    Abstract: A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: April 14, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Vincent G. Dominic, Fred A. Kish, Jr., Mark J. Missey, Radhakrishnan L. Nagarajan, Atul Mathur, Frank H. Peters, Robert B. Taylor, Matthew L. Mitchell, Alan C. Nilsson, Stephen G. Grubb, Richard P. Schneider, Charles H. Joyner, Jonas Webjorn, Ting-Kuang Chiang, Robert Grencavich, Vinh D. Nguyen, Donald J. Pavinski, Jr., Marco E. Sosa
  • Patent number: 7512295
    Abstract: A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: March 31, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Vincent G. Dominic, Fred A. Kish, Jr., Mark J. Missey, Radhakrishnan L. Nagarajan, Atul Mathur, Frank H. Peters, Robert B. Taylor, Matthew L. Mitchell, Alan C. Nilsson, Stephen G. Grubb, Richard P. Schneider, Charles H. Joyner, Jonas Webjorn, Drew D. Perkins
  • Patent number: 7491565
    Abstract: Devices and techniques for fabricating InAlGaN light-emitting devices are described that result from the removal of light-emitting layers from the sapphire growth substrate. In several embodiments, techniques for fabricating a vertical InAlGaN light-emitting diode structure that result in improved performance and or cost-effectiveness are described. Furthermore, metal bonding, substrate liftoff, and a novel RIE device separation technique are employed to efficiently produce vertical GaN LEDs on a substrate chosen for its thermal conductivity and ease of fabrication.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: February 17, 2009
    Assignee: Philips Lumileds Lighting Company, LLC
    Inventors: Carrie Carter Coman, Fred A. Kish, Jr., Michael R Krames, Paul S Martin
  • Patent number: 7489838
    Abstract: An optical transmitter comprises an array of modulated sources having different operating wavelengths approximating a standardized wavelength grid and providing signal outputs of different wavelengths. Signal outputs of the modulated sources are optically coupled to inputs of the wavelength selective combiner to produce a combined signal output from the combiner. The wavelength selective combiner has a wavelength grid passband response approximating the wavelength grid of the standardized wavelength grid. A first wavelength tuning element is coupled to each of the modulated sources and a second wavelength tuning element is coupled to the wavelength selective combiner. A wavelength monitoring unit is coupled to receive a sampled portion the combined signal output from the wavelength selective combiner. A wavelength control system is coupled to the first and second wavelength tuning elements and to the wavelength monitoring unit to receive the sampled portion of the combined signal output.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: February 10, 2009
    Assignee: Infinera Corporation
    Inventors: Fred A. Kish, Jr., Charles H. Joyner, David F. Welch, Robert B. Taylor, Alan C. Nilsson
  • Patent number: 7483599
    Abstract: A method of calibrating a monolithic transmitter photonic integrated circuit (TxPIC) chip is disclosed where the chip contains integrated arrays of laser sources and electro-optic modulators forming a plurality of different wavelength signal channels where each laser source on the chip is sequentially selected and tested for the output power and operational wavelength. Calibration data is initially determined by checking an amount of output power of each laser output and any offset of each laser operational wavelength from a desired predetermined value. Then, adjustment of the operational wavelength of each laser source is accomplished to substantially match the desired predetermined value. The laser source output power and operational wavelength may then be rechecked to determine if there is any remaining offset of each laser operational wavelength from the desired predetermined value.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: January 27, 2009
    Assignee: Infinera Corporation
    Inventors: Fred A. Kish, Jr., Charles H. Joyner, Radhakrishnan L. Nagarajan, Richard P. Schneider, Vincent D. Dominic
  • Publication number: 20090022495
    Abstract: Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and a modulator (TxPIC) and in another case, may minimally include a photodetector to which channels, in either case, an AVE or an MFE may be added.
    Type: Application
    Filed: September 29, 2008
    Publication date: January 22, 2009
    Inventors: David F. Welch, Fred A. Kish, JR., Radhakrishnan L. Nagarajan, Alan C. Nilsson, Robert B. Taylor
  • Publication number: 20090022452
    Abstract: A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.
    Type: Application
    Filed: September 29, 2008
    Publication date: January 22, 2009
    Inventors: David F. Welch, Vincent G. Dominic, Fred A. Kish, JR., Mark J. Missey, Radhakrishnan L. Nagarajan, Atul Mathur, Frank H. Peters, Robert B. Taylor, Matthew L. Mitchell, Alan C. Nilsson, Stephen G. Grubb, Richard P. Schneider, Charles H. Joyner, Jonas Webjorn, Drew D. Perkins
  • Patent number: 7477807
    Abstract: A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: January 13, 2009
    Assignee: Infinera Corporation
    Inventors: David F. Welch, Vincent G. Dominic, Fred A. Kish, Jr., Mark J. Missey, Radhakrishnan L. Nagarajan, Atul Mathur, Frank H. Peters, Robert B. Taylor, Matthew L. Mitchell, Alan C. Nilsson, Stephen G. Grubb, Richard P. Schneider, Charles H. Joyner, Jonas Webjorn, Drew D. Perkins
  • Patent number: 7471857
    Abstract: An optical transmitter comprises a monolithic transmitter photonic integrated circuit (TxPIC) chip that includes an array of modulated sources formed on the PIC chip and having different operating wavelengths approximating a standardized wavelength grid and providing signal outputs of different wavelengths. A wavelength selective combiner is formed on the PIC chip having a wavelength grid passband response approximating the wavelength grid of the standardized wavelength grid. The signal outputs of the modulated sources optically coupled to inputs of the wavelength selective combiner to produce a combined signal output from the combiner. A first wavelength tuning element coupled to each of the modulated sources and a second wavelength tuning element coupled to the wavelength selective combiner. A wavelength monitoring unit is coupled to the wavelength selective combiner to sample the combined signal output.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: December 30, 2008
    Assignee: Infinera Corporation
    Inventors: Fred A. Kish, Jr., Charles H. Joyner, David F. Welch, Robert B. Taylor, Alan C. Nilsson
  • Patent number: 7466882
    Abstract: A single monolithic transceiver chip for handling optical to electrical to optical conversion of optical WDM signals in an optical transmission network which has an optical WDM signal input for reception of a WDM signal and an optical WDM signal output for transmission of a WDM signal and a plurality of electrical signal outputs and a plurality of electrical signal inputs. The chip further comprises an integrated decombiner coupled to the optical signal input that separates the WDM signal into a plurality of separate optical channel signals, an integrated array of photodetectors that each receives a respective optical channel signal and that converts the optical channel signal into an electrical signal and that provides the converted electrical signals to the electrical signal outputs of the transceiver chip.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: December 16, 2008
    Assignee: Infinera Corporation
    Inventors: Fred A. Kish, Jr., David F. Welch, Charles H. Joyner
  • Patent number: 7437029
    Abstract: A monolithic photonic integrated circuit (PIC) chip where the active waveguide cores of the modulated sources of the PIC are multiple quantum wells (MQWs) and the passive waveguide cores of an optical combiner are a bulk layer or material. The cores of the waveguide cores may be a quaternary such as InGaAsP or InAlGaAs.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: October 14, 2008
    Assignee: Infinera Corporation
    Inventors: Charles H. Joyner, Fred A. Kish, Jr., Frank H. Peters, Atul Mathur, David F. Welch, Andrew G. Dentai, Damien Lambert, Richard P. Schneider, Mark J. Missey