Patents by Inventor John Parker

John Parker 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).

  • OPTICAL REDISTRIBUTION LAYERS FOR HIGH-CHANNEL-COUNT PHOTONICS
    Publication number: 20220123840
    Abstract: High-channel-count optical transceivers can be implemented in photonic integrated circuits (PICs) with shared lasers, splitting the light of each laser between multiple lanes prior to modulation. To reduce waveguide crossings in such PICs, transmitter and self-test functionality may be distributed between separate device layers. Various beneficial transmitter circuitry layouts are disclosed.
    Type: Application
    Filed: December 28, 2021
    Publication date: April 21, 2022
    Inventor: John Parker
  • ATOMIC LAYER DEPOSITION BONDING FOR HETEROGENEOUS INTEGRATION OF PHOTONICS AND ELECTRONICS
    Publication number: 20220107458
    Abstract: Methods and systems are presented for heterogeneous integration of photonics and electronics with atomic layer deposition (ALD) bonding. One method includes operations for forming a compound semiconductor and for depositing (e.g., via atomic layer deposition) a continuous film of a protection material (e.g., Al2O3) on a first surface of the compound semiconductor. Further, the method includes an operation for forming a silicon on insulator (SOI) wafer, with the SOI wafer comprising one or more waveguides. The method further includes bonding the compound semiconductor at the first surface to the SOI wafer to form a bonded structure and processing the bonded structure. The protection material protects the compound semiconductor from acid etchants during further processing of the bonded structure.
    Type: Application
    Filed: December 17, 2021
    Publication date: April 7, 2022
    Inventors: John Parker, Gregory Alan Fish, Martin A. Spannagel, Antonio Labaro
  • OPTICAL TEMPERATURE MEASUREMENTS IN PHOTONIC CIRCUITS
    Publication number: 20220107229
    Abstract: Temperature measurements of photonic circuit components may be performed optically, exploiting a temperature-dependent spectral property of the photonic device to be monitored itself, or of a separate optical temperature sensor placed in its vicinity. By facilitating measurements of the temperature of the individual photonic devices rather than merely the photonic circuit at large, such optical temperature measurements can provide more accurate temperature information and help improve thermal design.
    Type: Application
    Filed: October 5, 2020
    Publication date: April 7, 2022
    Inventors: Chris Barnard, John Parker
  • HYBRID PHOTONIC RING MODULATORS
    Publication number: 20220107542
    Abstract: Photonic ring modulators with high tuning efficiency and small footprint can be formed in a hybrid material platform from a silicon bus waveguide vertically coupled to an optically active compound semiconductor (e.g., III-V) ring resonator. The performance of the modulator, e.g., in terms of the tuning efficiency and the maximum insertion loss, may be optimized by suitable levels of an applied bias voltage and a heater power of a heater optionally included in the ring modulator. The disclosed hybrid photonic ring modulators may be used, e.g., in photonic transceiver circuits with high lane count.
    Type: Application
    Filed: October 7, 2020
    Publication date: April 7, 2022
    Inventors: John Parker, Jonathan Edgar Roth, Gregory Alan Fish
  • METHODS AND SYSTEMS FOR TERRAIN-BASED LOCALIZATION OF A VEHICLE
    Publication number: 20220082705
    Abstract: A method of terrain-based localization of a vehicle is provided. The method may include determining the vehicle is within a threshold distance of a road segment end point and comparing a measured road profile to a reference road profile associated with the road segment. A method of identifying a track (e.g., a lane) of a road segment road profile is provided. The method may include determining if a number of stored road profiles exceeds a threshold number of road profiles and identifying one or more clusters in the stored road profiles if the threshold number is exceeded.
    Type: Application
    Filed: September 16, 2021
    Publication date: March 17, 2022
    Applicant: ClearMotion, Inc.
    Inventors: William Graves, John Parker Eisenmann
  • POWER-EFFICIENT INTEGRATED PHOTONIC SWITCH
    Publication number: 20220069908
    Abstract: Power consumption in MZI-based integrated photonic switches or filters throughout the operational life can be reduced by reducing fabrication-induced phase misalignment between the unpowered operational mode of the switch or filter and the predominant switch state, and/or by enabling low-power compensation for any such misalignment. In various embodiments, misalignment is reduced by increasing the width of the waveguides implementing the interferometer arms of the MZI, and/or by structuring a region containing the MZI symmetrically to diminish stress-induced misalignment. In some embodiments, phase tuners are used to actively compensate for any phase misalignment, with a tuner drive voltage substantially lower than used to switch to the non-dominant state.
    Type: Application
    Filed: August 25, 2020
    Publication date: March 3, 2022
    Inventor: John Parker
  • OPTICAL REDISTRIBUTION LAYERS FOR HIGH-CHANNEL-COUNT PHOTONICS
    Publication number: 20220069916
    Abstract: High-channel-count optical transceivers can be implemented in photonic integrated circuits (PICs) with shared lasers, splitting the light of each laser between multiple lanes prior to modulation. To reduce waveguide crossings in such PICs, transmitter and self-test functionality may be distributed between separate device layers. Various beneficial transmitter circuitry layouts are disclosed.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 3, 2022
    Inventor: John Parker
  • INTERMEDIATE FREQUENCY CALIBRATED OPTICAL MODULATORS
    Publication number: 20220069917
    Abstract: An optical modulator of an optical transceiver can be calibrated using intermediate frequency (IF) signals to generate accurate crossing point values (e.g., DC bias). A photodiode can measure output from the optical modulator at intermediate and high-speed frequencies to generate crossing point values that avoid crossing point errors. A target crossing point can be selected at any value (e.g., 40%, 50%) and bias values can be generated from IF signals and then stored in a lookup date for setting the modulator bias during operation.
    Type: Application
    Filed: April 5, 2021
    Publication date: March 3, 2022
    Inventor: John Parker
  • Optical redistribution layers for high-channel-count photonics
    Patent number: 11251874
    Abstract: High-channel-count optical transceivers can be implemented in photonic integrated circuits (PICs) with shared lasers, splitting the light of each laser between multiple lanes prior to modulation. To reduce waveguide crossings in such PICs, transmitter and self-test functionality may be distributed between separate device layers. Various beneficial transmitter circuitry layouts are disclosed.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: February 15, 2022
    Assignee: Juniper Networks, Inc.
    Inventor: John Parker
  • Improved Detection of Action Potentials
    Publication number: 20220039724
    Abstract: Separating a compound action potential from an artefact in a neural recording. A memory stores a set of basis functions comprising at least one compound action potential basis function and at least one artefact basis function. A neural recording of electrical activity in neural tissue is decomposed by determining at least one of a compound action potential and an artefact from the set of basis functions. An estimate is output of at least one of a compound action potential and an artefact.
    Type: Application
    Filed: December 17, 2019
    Publication date: February 10, 2022
    Applicant: Saluda Medical Pty Ltd
    Inventors: Daniel John Parker, Peter Scott Vallack Single, Kai Huang
  • Atomic layer deposition bonding for heterogeneous integration of photonics and electronics
    Patent number: 11237325
    Abstract: Methods and systems are presented for heterogeneous integration of photonics and electronics with atomic layer deposition (ALD) bonding. One method includes operations for forming a compound semiconductor and for depositing (e.g., via atomic layer deposition) a continuous film of a protection material (e.g., Al2O3) on a first surface of the compound semiconductor. Further, the method includes an operation for forming a silicon on insulator (SOI) wafer, with the SOI wafer comprising one or more waveguides. The method further includes bonding the compound semiconductor at the first surface to the SOI wafer to form a bonded structure and processing the bonded structure. The protection material protects the compound semiconductor from acid etchants during further processing of the bonded structure.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: February 1, 2022
    Assignee: Juniper Networks, Inc.
    Inventors: John Parker, Gregory Alan Fish, Martin A. Spannagel, Antonio Labaro
  • HIGH-LANE COUNT OPTICAL TRANSCEIVER WITH BUILT-IN SELF TEST
    Publication number: 20220029705
    Abstract: An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.
    Type: Application
    Filed: September 15, 2021
    Publication date: January 27, 2022
    Inventors: John Parker, John Garcia, Brandon Gomez, Molly Piels, Anand Ramaswamy
  • INTEGRATED BANDGAP TEMPERATURE SENSOR
    Publication number: 20210405291
    Abstract: Absolute temperature measurements of integrated photonic devices can be accomplished with integrated bandgap temperature sensors located adjacent the photonic devices. In various embodiments, the temperature of the active region within a diode structure of a photonic device is measured with an integrated bandgap temperature sensor that includes one or more diode junctions either in the semiconductor device layer beneath the active region or laterally adjacent to the photonic device, or in a diode structure formed above the semiconductor device layer and adjacent the diode structure of the photonic device.
    Type: Application
    Filed: June 30, 2020
    Publication date: December 30, 2021
    Inventors: John Parker, Benjamin M. Curtin
  • High-lane count optical transceiver with built-in self test
    Patent number: 11153009
    Abstract: An optical device such as an optical transceiver can include a cascaded built-in self-test structure that can be configured in testing mode using an active power mode and can sufficiently attenuate light away from a loopback path in an inactive power mode. The optical device can include a wafer top emitter that can be used to tune a light source for testing and calibration of optical components while the built-in self-test structure is in active mode.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: October 19, 2021
    Assignee: Juniper Networks, Inc.
    Inventors: John Parker, John Garcia, Brandon Gomez, Molly Piels, Anand Ramaswamy
  • ENGINE MODULE
    Publication number: 20210310442
    Abstract: A hybrid airbreathing rocket engine module (70) comprises an air intake arrangement (62) configured to receive air and a heat exchanger arrangement (63) configured to cool air from the air intake arrangement (62); a compressor (64) configured to compress air from the heat exchanger arrangement (63); and one or more thrust chambers (65). The air intake arrangement (62), the compressor (64), the heat exchanger arrangement (63), and the one or more thrust chambers (65) are arranged generally along an axis (69) of the engine module (70). The heat exchanger arrangement (63) is arranged between the compressor (64) and the one or more thrust chambers (65).
    Type: Application
    Filed: August 16, 2019
    Publication date: October 7, 2021
    Inventors: Richard John Parker, Richard Anthony Varvill
  • PREVENTING DISCLOSURE OF SENSITIVE INFORMATION
    Publication number: 20210304341
    Abstract: In an approach, a processor provides multiple defined categories of sensitive information. For each post associated with an entity, a processor extracts one or more information portions. A processor determines one or more categories to which each of the one or more information portions is relevant. A processor analyzes a category's respective information portions to combine the respective information portions determined to be relevant to the category to determine whether the combination of the respective information portions discloses sensitive information.
    Type: Application
    Filed: March 26, 2020
    Publication date: September 30, 2021
    Inventors: Sophie D. Green, Robert William John Parker, Stephen R.F. Head, Katherine Elizabeth Stanley
  • RADIO-FREQUENCY LOSS REDUCTION IN PHOTONIC CIRCUITS
    Publication number: 20210215992
    Abstract: In photonic integrated circuits implemented in silicon-on-insulator substrates, nonconductive channels formed, in accordance with various embodiments, in the silicon device layer and/or the silicon handle of the substrate in regions underneath radio-frequency transmission lines of photonic devices can provide breaks in parasitic conductive layers of the substrate, thereby reducing radio-frequency substrate losses.
    Type: Application
    Filed: March 16, 2021
    Publication date: July 15, 2021
    Inventors: John Parker, Gregory Alan Fish, Brian R. Koch
  • ELECTRO-ABSORPTION MODULATOR WITH IMPROVED PHOTOCURRENT UNIFORMITY
    Publication number: 20210203126
    Abstract: Disclosed are integrated electro-absorption modulators (EAM) that are structured and/or operated to improve uniformity of the photocurrent density along the active region. In various embodiments, this improvement results from increased optical absorption at the rear of the EAM, e.g., as achieved by heating a region at the rear, increasing a bias voltage applied across the EAM towards the rear, or changing a material composition of an intrinsic layer towards the rear. In another embodiment, the improvement is achieved by coupling light from a waveguide into the EAM active region continuously along a length of the EAM, using overlap between a tapered section of the waveguide and the EAM.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 1, 2021
    Inventor: John Parker
  • Intermediate frequency calibrated optical modulators
    Patent number: 10998979
    Abstract: An optical modulator of an optical transceiver can be calibrated using intermediate frequency (IF) signals to generate accurate crossing point values (e.g., DC bias). A photodiode can measure output from the optical modulator at intermediate and high-speed frequencies to generate crossing point values that avoid crossing point errors. A target crossing point can be selected at any value (e.g., 40%, 50%) and bias values can be generated from IF signals and then stored in a lookup date for setting the modulator bias during operation.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: May 4, 2021
    Assignee: Juniper Networks, Inc.
    Inventor: John Parker
  • Radio-frequency loss reduction in photonic circuits
    Patent number: 10976637
    Abstract: In photonic integrated circuits implemented in silicon-on-insulator substrates, non-conductive channels formed, in accordance with various embodiments, in the silicon device layer and/or the silicon handle of the substrate in regions underneath radio-frequency transmission lines of photonic devices can provide breaks in parasitic conductive layers of the substrate, thereby reducing radio-frequency substrate losses.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: April 13, 2021
    Assignee: Aurrion, Inc.
    Inventors: John Parker, Gregory Alan Fish, Brian R. Koch