Patents by Inventor Jacob Khurgin

Jacob Khurgin 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: 20110164299
    Abstract: This invention provides an optical device comprising a large group of non-uniform resonators operating cumulatively as a ‘super-ring’ to provide a controllable group delay with large bandwidth. The super-ring tuning is performed by a single control. The device may include two super-rings, each includes a large number of resonators with a resonant frequencies centered around ?1 and ?2 respectively. The invention provides multiple ways to improve the delay duration, bandwidth and the tuning speed, and overcomes the issue of non-uniformity of resonance frequency for devices incorporating multiple optical resonators.
    Type: Application
    Filed: March 10, 2011
    Publication date: July 7, 2011
    Inventors: Paul A. Morton, Jacob Khurgin
  • Patent number: 7974543
    Abstract: A device for phase distortion compensation across an optical beam is provided. The device is a part of an optical receiver, which can be used in free space optical communications, remote sensing, optical imaging and others. 2M inputs of the combiner interfere with each other via a system of tunable coupled waveguides. The phases in interleaved waveguides of the combiner are adjusted to maximize the resulting output signal. The combiner may be used for coherent communication in combination with a balanced 90° hybrid. Integrated solutions for the proposed device are provided.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: July 5, 2011
    Assignee: CeLight, Inc.
    Inventors: Jacob Khurgin, Isaac Shpantzer, Arkady Kaplan, Pak Shing Cho
  • Patent number: 7961997
    Abstract: An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free space optical communications, remote sensing, optical imaging and others. A multitude of optical beam portions is captured by a space diversity receiver that includes an optical beam combiner, which has a tree-like topology with interconnected waveguides, electro-optic phase shifters, and directional couplers. For each of the beam portions the phase of the phase shifter and the coupling ratio of coupler in the optical beam combiner are tuned sequentially to maximize the final output power in the final optical waveguide. A portion of the final output beam is used for the power detection and forming a feedback signal for the phases and coupling ratios adjustment. The data or information is recovered from the received final optical beam using coherent detection.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: June 14, 2011
    Assignee: CeLight, Inc.
    Inventors: Pak Shing Cho, Jacob Khurgin, Isaac Shpantzer
  • Patent number: 7949262
    Abstract: An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free-space optical communications, remote sensing, optical imaging and others. A multitude of transverse scattered optical beam portions is captured by the multi-aperture array positioned perpendicular to the beam projection direction. These beam portions are combined first into a single optical waveguide with modulating the beam portions phase and coupling ratio of directional couplers in the optical beam combiner tuned to maximize the final output power. A portion of the output beam is used for the power detection and forming a feedback signal for the phases and coupling ratios adjustment. The data is recovered from the received optical beam using coherent detection.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: May 24, 2011
    Assignee: CeLight, Inc.
    Inventors: Pak Shing Cho, Jacob Khurgin, Isaac Shpantzer
  • Publication number: 20110080930
    Abstract: The present invention relates generally to highly power-efficient quantum cascade sources, such as highly power-efficient quantum cascade lasers having ultra-strong coupling between injector and active regions which may be configured to provide broadband quantum cascade lasers.
    Type: Application
    Filed: June 8, 2010
    Publication date: April 7, 2011
    Inventors: Qiang Liu, Yu Yao, Anthony J. Hoffman, Matthew Escarra, Kale J. Franz, Jacob Khurgin, Yamac Dikmelik, William O. Charles, Jianxin Chen, Claire F. Gmachl
  • Publication number: 20110019955
    Abstract: This invention provides a balanced thermal approach to the tuning of an optical time delay device in order to eliminate any long-term time response of the device performance due to thermal time constants of the device, its mount, packaging or electronic temperature control circuits. The invention provides multiple ways to improve the thermal tuning speed of the balanced thermal approach. Additionally, the invention overcomes an issue of microresonator non-uniformity by operating a large group of microresonators as a ‘super-ring’ by tuning the large group together to provide a controllable group delay with large bandwidth.
    Type: Application
    Filed: October 4, 2010
    Publication date: January 27, 2011
    Inventors: Paul A. Morton, Jacob Khurgin
  • Patent number: 7831119
    Abstract: This invention provides a tunable delay of an optical signal having multiple frequency components. The delay comprises at least a first and a second integrated resonators coupled sequentially to a waveguide; the resonators have angular resonant frequencies ?1=?0??? and ?2=?0+?? respectively, ?0 is a median frequency of an input optical signal and ?? is a tunable deviation from the median frequency. The device is providing a nearly equal true time delay to all frequency components in the output signal.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: November 9, 2010
    Assignee: Morton Photonics
    Inventors: Jacob Khurgin, Paul A. Morton
  • Patent number: 7801395
    Abstract: An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A third coupler is coupled to the first output of the first coupler and to the first output of the second coupler. A fourth coupler is coupled to the second output of the first coupler and to the second output of the second coupler. First and second crossing waveguides are provided with an angle selected to minimize crosstalk and losses between the first and second cross waveguides. The first crossing waveguide connects one of the first or second outputs from the first coupler with an input of the fourth coupler. The second crossing waveguide connects one of the first or second outputs from the second coupler with an input of the third coupler. A first phase shifter is coupled to the first and second waveguides.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: September 21, 2010
    Assignee: CeLight, Inc.
    Inventors: Isaac Shpantzer, Aviv Salamon, Arkady Kaplan, Pak Shing Cho, Jacob Khurgin, Yaakov Achiam, Arthur Greenblatt, Geofrey Harston
  • Publication number: 20100135656
    Abstract: The present invention discloses a transmitter and receiver for optical communications system, which provide compensation of the optical link nonlinearity. M-PSK modulating is used for data embedding in an optical signal in each WDM channel using orthogonal frequency division multiplexing (OFDM) technique. At the receiver side electrical output signals from a coherent optical receiver are processed digitally with the link nonlinearity compensation. It is followed by the signal conversion into frequency domain and information recovery from each subcarrier of the OFDM signal. At the transmitter side an OFDM encoder provides a correction of I and Q components of a M-PSK modulator driving signal to compensate the link nonlinearity prior to sending the optical signal to the receiver.
    Type: Application
    Filed: January 29, 2010
    Publication date: June 3, 2010
    Inventors: Jacob Khurgin, Isaac Shpantzer
  • Patent number: 7693428
    Abstract: The present invention discloses a transmitter and receiver for optical communications system, which provide compensation of the optical link nonlinearity. M-PSK modulating is used for data embedding in an optical signal in each WDM channel using orthogonal frequency division multiplexing (OFDM) technique. At the receiver side electrical output signals from a coherent optical receiver are processed digitally with the link nonlinearity compensation. It is followed by the signal conversion into frequency domain and information recovery from each subcarrier of the OFDM signal. At the transmitter side an OFDM encoder provides a correction of I and Q components of a M-PSK modulator driving signal to compensate the link nonlinearity prior to sending the optical signal to the receiver.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: April 6, 2010
    Assignee: CeLight, Inc.
    Inventors: Jacob Khurgin, Isaac Shpantzer
  • Publication number: 20090269083
    Abstract: An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free-space optical communications, remote sensing, optical imaging and others. A multitude of transverse scattered optical beam portions is captured by the multi-aperture array positioned perpendicular to the beam projection direction. These beam portions are combined first into a single optical waveguide with modulating the beam portions phase and coupling ratio of directional couplers in the optical beam combiner tuned to maximize the final output power. A portion of the output beam is used for the power detection and forming a feedback signal for the phases and coupling ratios adjustment. The data is recovered from the received optical beam using coherent detection.
    Type: Application
    Filed: February 25, 2009
    Publication date: October 29, 2009
    Inventors: Pak Shing Cho, Jacob Khurgin, Isaac Shpantzer
  • Publication number: 20090236528
    Abstract: A photo-thermal, interferometric spectroscopy system is disclosed that provides information about a chemical, such as explosives and the like, at a remote location. It may be used for solid residue detection on a surface. The system includes a novel light detector system with a matrix of optical elements focusing portions of a received light beam on input waveguides of an optical combiner. The combiner adjusts the phases of the received beam portions and combines them together to maximize the intensity of an output beam. The output beam is detected by a detector, and information about at least one of, absorption spectrum and concentration of the chemical is recovered. In the preferred embodiment the detector is a coherent detector based on 90-degrees optical hybrid.
    Type: Application
    Filed: January 29, 2009
    Publication date: September 24, 2009
    Inventors: Isaac Shpantzer, Jacob Khurgin, Arkady Kaplan, Pak Shing Cho, Yaakov Achiam
  • Publication number: 20090220246
    Abstract: A device for phase distortion compensation across an optical beam is provided. The device is a part of an optical receiver, which can be used in free space optical communications, remote sensing, optical imaging and others. 2M inputs of the combiner interfere with each other via a system of tunable coupled waveguides. The phases in interleaved waveguides of the combiner are adjusted to maximize the resulting output signal. The combiner may be used for coherent communication in combination with a balanced 90° hybrid. Integrated solutions for the proposed device are provided.
    Type: Application
    Filed: December 9, 2008
    Publication date: September 3, 2009
    Inventors: Jacob Khurgin, Isaac Shpantzer, Arkady Kaplan, Pak Shing Cho
  • Publication number: 20090190929
    Abstract: The present invention discloses a transmitter and receiver for optical communications system, which provide compensation of the optical link nonlinearity. M-PSK modulating is used for data embedding in an optical signal in each WDM channel using orthogonal frequency division multiplexing (OFDM) technique. At the receiver side electrical output signals from a coherent optical receiver are processed digitally with the link nonlinearity compensation. It is followed by the signal conversion into frequency domain and information recovery from each subcarrier of the OFDM signal. At the transmitter side an OFDM encoder provides a correction of I and Q components of a M-PSK modulator driving signal to compensate the link nonlinearity prior to sending the optical signal to the receiver.
    Type: Application
    Filed: April 3, 2009
    Publication date: July 30, 2009
    Inventors: Jacob Khurgin, Isaac Shpantzer
  • Publication number: 20090185811
    Abstract: An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free space optical communications, remote sensing, optical imaging and others. A multitude of optical beam portions is captured by a space diversity receiver that includes an optical beam combiner, which has a tree-like topology with interconnected waveguides, electro-optic phase shifters, and directional couplers. For each of the beam portions the phase of the phase shifter and the coupling ratio of coupler in the optical beam combiner are tuned sequentially to maximize the final output power in the final optical waveguide. A portion of the final output beam is used for the power detection and forming a feedback signal for the phases and coupling ratios adjustment. The data or information is recovered from the received final optical beam using coherent detection.
    Type: Application
    Filed: February 20, 2009
    Publication date: July 23, 2009
    Inventors: Pak Shing Cho, Jacob Khurgin, Isaac Shpantzer
  • Patent number: 7558450
    Abstract: This invention provides a tunable delay of an optical signal having a carrier with an angular frequency ?0 and a single side band having a signal band with a median angular frequency ?r. The delay line comprises at least a first, a second and a third integrated resonators coupled sequentially to a waveguide. The first and the second resonators have angular resonant frequencies ?1=?r??? and ?2=?r+?? respectively, where ?? is a deviation from the median frequency. The third resonator provides a phase delay difference between the phase at the optical carrier ?0 and the phase at the median frequency ?r equal to (?r??0)Td, where Td is the time delay. The device provides an equal group delay to all frequency components in the output signal and also equal phase delay for all frequency components of an RF signal when the optical signal is downconverted at a photodetector. The device may find applications controlling the time delay to antenna elements in a phased array system.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: July 7, 2009
    Assignee: Morton Photonics, Inc.
    Inventors: Jacob Khurgin, Paul A. Morton
  • Publication number: 20090169221
    Abstract: An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free space optical communications, remote sensing, optical imaging and others. A multitude of transverse scattered optical beam portions is captured by the multi-aperture array positioned perpendicular to the beam projection direction. These beam portions are combined first into a single optical waveguide with minimal loss of power. This is achieved by modulating the beam portions phase and coupling ratio of couplers in the optical beam combiner tuned to maximize the final output power. The data is recovered from the received optical beam using coherent detection.
    Type: Application
    Filed: February 13, 2009
    Publication date: July 2, 2009
    Inventors: Pak Shing Cho, Isaac Shpantzer, Jacob Khurgin
  • Publication number: 20090142051
    Abstract: An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A third coupler is coupled to the first output of the first coupler and to the first output of the second coupler. A fourth coupler is coupled to the second output of the first coupler and to the second output of the second coupler. First and second crossing waveguides are provided with an angle selected to minimize crosstalk and losses between the first and second cross waveguides. The first crossing waveguide connects one of the first or second outputs from the first coupler with an input of the fourth coupler. The second crossing waveguide connects one of the first or second outputs from the second coupler with an input of the third coupler. A first phase shifter is coupled to the first and second waveguides.
    Type: Application
    Filed: November 12, 2007
    Publication date: June 4, 2009
    Inventors: Isaac Shpantzer, Aviv Salamon, Arkady Kaplan, Pak Shing Cho, Jacob Khurgin, Yaakov Achiam, Arthur Greenblatt, Geofrey Harston
  • Publication number: 20090123107
    Abstract: This invention provides a tunable delay of an optical signal having multiple frequency components. The delay comprises at least a first and a second integrated resonators coupled sequentially to a waveguide; the resonators have angular resonant frequencies ?1=?0??? and ?2=?0+?? respectively, ?0 is a median frequency of an input optical signal and ?? is a tunable deviation from the median frequency. The device is providing a nearly equal true time delay to all frequency components in the output signal.
    Type: Application
    Filed: September 5, 2008
    Publication date: May 14, 2009
    Inventors: Jacob Khurgin, Paul A. Morton
  • Publication number: 20090067772
    Abstract: This invention provides a tunable delay of an optical signal having a carrier with an angular frequency ?0 and a single side band having a signal band with a median angular frequency ?r. The delay line comprises at least a first, a second and a third integrated resonators coupled sequentially to a waveguide. The first and the second resonators have angular resonant frequencies ?1=?r?? and ?2=?r+?? respectively, where ?? is a deviation from the median frequency. The third resonator provides a phase delay difference between the phase at the optical carrier ?0 and the phase at the median frequency (Or equal to (?r??0)Td, where Td is the time delay. The device provides an equal group delay to all frequency components in the output signal and also equal phase delay for all frequency components of an RF signal when the optical signal is downconverted at a photodetector. The device may find applications controlling the time delay to antenna elements in a phased array system.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 12, 2009
    Inventors: Jacob Khurgin, Paul A. Morton