Patents by Inventor Daniel Yap

Daniel Yap 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: 9903757
    Abstract: A sensor includes a plurality of transmitter units, a photodetector, and an optical system coupled to the plurality of transmitter units and the photodetector. Each of the transmitter units simultaneously transmits a light beam having a plurality of wavelengths, the optical system directs the light beam from each of the transmitter units onto a same illuminated spot on a probed surface, and the optical system collects light from the same illuminated spot and directs the light to the photodetector.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: February 27, 2018
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Brian Neff
  • Patent number: 9882654
    Abstract: A radio frequency (RF) link includes a link transmitter that includes a data modulator for modulating a data waveform together with an RF carrier, a photonic encoder coupled to the data modulator, and a transmitter antenna for transmitting an RF signal, wherein the RF signal comprises an output of the photonic encoder, and a link receiver including a receiver antenna for receiving the RF signal, a first laser source, a photonic limiter coupled to the first laser source and to the receiving antenna, a photonic decoder coupled to the photonic limiter, a photo-receiver coupled to the photonic decoder, and a demodulator coupled to the photo-receiver for demodulating an output of the photo-receiver with the RF carrier to form a data output.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: January 30, 2018
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 9835724
    Abstract: A system and method includes an array position sensing detector. The array position sensing detector includes a lateral effect position sensing detector element and a summing amplifier. The lateral effect position sensing detector element produces an output coupled with the summing amplifier through a switch.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: December 5, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Daniel Yap, Randall White, Daniel S. Matic
  • Patent number: 9726818
    Abstract: A photonic waveguide for conducting light having first and second wavelengths, the waveguide comprising superposed first and second strips of light conducting semiconductor materials having first and second refractive indexes, wherein the second wavelength is shorter than the first wavelength and the second refractive index is higher than the first refractive index, wherein the width and height of the first strip of light conducting semiconductor material are such that the first strip of light conducting semiconductor material is adapted to confine an optical mode of the first wavelength and the width and height of the second strip of light conducting semiconductor material are such that the second strip of light conducting semiconductor material is adapted to confine an optical mode of the second wavelength but is too narrow to confine an optical mode of the first wavelength.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: August 8, 2017
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Troy Rockwood, Kevin Geary, Sarabjit Mehta
  • Patent number: 9709711
    Abstract: A wavelength-selective optical diffuser comprising a substrate of a first material having opposite first and second surfaces, wherein said first material is transparent to a first wavelength ?S and a second wavelength ?L, with ?L>4?S; at least a first surface of said substrate having a surface relief such that a beam of light having the first wavelength ?S is diffused, with a rms phase delay S>?/4, when traversing said substrate; and a beam of light having the second wavelength ?L is minimally diffused, with a rms phase delay S<?/4, when traversing said substrate.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: July 18, 2017
    Assignees: HRL Laboratories, LLC, The Boeing Company
    Inventors: Daniel Yap, Hasan Sharifi, Don F. Weston, Rajesh D. Rajavel
  • Patent number: 9664931
    Abstract: An electro-optic modulation structure comprises a first electrode and a second electrode and a first electro-optic strip; wherein the first electrode has a slab portion and a first ridge protruding from the slab portion of the first electrode, and the second electrode has a slab portion and a first ridge protruding from the slab portion of the second electrode, the first protruding ridge of the first electrode and the first protruding ridge of the second electrode being disposed on opposite sides of the first electro-optic strip and both protruding ridges abut the first electro-optic strip.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: May 30, 2017
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, James H. Shaffner
  • Patent number: 9647187
    Abstract: A two-dimensional phased array beam former comprising at least first and second chips having each top and bottom surfaces, the bottom surface of the first chip being attached to the top surface of the second chip; the first and second chips having each an emitter side surface, the emitter side surfaces of the first and second chips facing a same direction and comprising each a plurality of emitters; wherein each of said first and second chips comprises at least one conductive post extending between said top and bottom surfaces; the at least one conductive post of the first chip being vertically aligned with and connected to the at least one conductive post of the second chip.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: May 9, 2017
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Kevin Geary, James Schaffner
  • Patent number: 9557585
    Abstract: A phased array that comprises a predetermined number of emitter/receiver elements; said emitter/receiver elements being arranged on a array formed of stacked rows, wherein the emitter/receiver elements in each row of the array are distributed according to a pseudo-random pattern; and the heights of the rows vary according to a pseudo-random pattern.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: January 31, 2017
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Kevin Geary, Carson R. White
  • Patent number: 9520525
    Abstract: An infrared photo-detector with multiple discrete regions of a first absorber material. These regions may have geometric shapes with sloped sidewalls. The detector also may include a second absorber region comprising a second absorber material that absorbs light of a shorter wavelength than the light absorbed by the multiple discrete absorber regions of the first absorber material. The geometric shapes may extend only through the first absorber material. Alternatively, the geometric shapes may extend partially into the second absorber region. The detector has a metal reflector coupled to the multiple discrete absorber regions. The detector also has a substrate containing the discrete absorber regions and the second absorber region. The substrate can further include geometric shaped features etched into the substrate, with those features formed on the side of the substrate opposite the side containing the discrete absorber regions and the second absorber region.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: December 13, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Rajesh D. Rajavel, Sarabjit Mehta, Hasan Sharifi
  • Patent number: 9490292
    Abstract: An infrared photo-detector array and a method for manufacturing it are disclosed. The infrared photo-detector array contains a collector layer, a first absorber layer that absorbs incident light of a first wavelength band and generates first electrons and first holes, a second absorber layer that absorbs incident light of a second wavelength band and generates second electrons and second holes, and wherein the wavelengths of the incident light in the first wavelength band are shorter than the wavelengths of the incident light in the second wavelength band, and wherein the second absorber layer is laterally contiguous across at least two photo-detectors. The method disclosed teaches how to manufacture the infrared photo-detector array.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: November 8, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Rajesh D. Rajavel
  • Patent number: 9444001
    Abstract: A position sensitive detector includes a substrate, an absorber layer on the substrate, a barrier layer on the absorber layer, a contact layer on the barrier layer, and a first contact and a second contact on the contact layer. The barrier layer prevents a flow of majority carriers from the absorber layer to the contact layer. The position sensitive detector is sensitive to a lateral position between the first contact and the second contact of incident light on the contact layer.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: September 13, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: Hasan Sharifi, Rajesh D. Rajavel, Terence J. De Lyon, Daniel Yap
  • Patent number: 9335568
    Abstract: An optical-waveguide grating modulator is compatible with high-frequency electrical modulation signals of limited bandwidth. The modulator comprises an optical grating formed in an optical waveguide constructed from electro-optic (EO) material and an electrode that is an RF waveguide or RF transmission line that conducts a traveling-wave electromagnetic (EM) field and that contains a portion of the optical-grating waveguide with a continuous grating. The RF input modulation signal is coupled into an RF EM field that propagates through the RF waveguide or transmission line in a direction that is parallel to the direction the light propagates in the optical-grating waveguide and that EM field overlaps the optical-grating waveguide. The light travels along the optical-grating waveguide preferably at the same velocity as the RF EM field travels along the RF waveguide or transmission line.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: May 10, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Oleg M. Efimov, James H. Schaffner
  • Patent number: 9291837
    Abstract: An optical modulator includes a waveguide Mach-Zehnder interferometer having a first and a second input and a first and a second output, a feedback waveguide segment connecting the second output with the second input, and a traveling-wave electrode; wherein the Mach-Zehnder interferometer, feedback waveguide segment and traveling-wave electrode are substantially arranged at or adjacent the perimeter of a smooth curve defining a closed geometric figure, the traveling-wave electrode extending along at least 50% of the length of the perimeter of the smooth curve.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: March 22, 2016
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 9274203
    Abstract: Centroid locating sensors and methods for locating an illuminated spot on a detector are provided. One sensor includes a plurality of photo-diode (PD) detector elements connected to the PD detector elements. The sensor also includes a plurality of digitization comparators connected to the plurality of PD detector elements and configured to receive output signals from the plurality of PD detector elements and generate a binary 1 output when the output from the PD detector element exceeds a threshold set point and generate a binary 0 output when the output is below the threshold set point. The sensor further includes a plurality of spatial filtering logic circuits connected to the digitization comparators and are configured to receive outputs from a plurality of the PD detector elements and to reject noise for one of the PD detector elements.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: March 1, 2016
    Assignee: The Boeing Company
    Inventors: Daniel Yap, Randall White
  • Publication number: 20160047911
    Abstract: A system and method includes an array position sensing detector. The array position sensing detector includes a lateral effect position sensing detector element and a summing amplifier. The lateral effect position sensing detector element produces an output coupled with the summing amplifier through a switch.
    Type: Application
    Filed: August 15, 2014
    Publication date: February 18, 2016
    Inventors: Daniel Yap, Randall White, Daniel S. Matic
  • Patent number: 9250452
    Abstract: An photonic RF circulator is described that provides greater than 40 db of isolation between a Received RF signal and a Transmitted RF signal in a simultaneous transmit and receive device. The photonic RF circulator uses light modulated in an optical waveguide grating where the Received RF signal co-propagates with the light and the Transmitted RF signal counter-propagates with the light. Variations described within provide for broadening the bandwidth of the T/R isolation and rejection of various noise sources.
    Type: Grant
    Filed: October 13, 2012
    Date of Patent: February 2, 2016
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, James H. Schaffner, Oleg M. Efimov
  • Patent number: 9194751
    Abstract: Systems and methods for dual-mode optical sensing are provided. One system includes a focal-plane array (FPA) imaging detector configured to detect light of a first wavelength range and an illuminated-spot locating detector (ISLD) including an array of light-detecting elements configured to detect light of a second wavelength range, wherein the ISLD has a transparency to light of the first wavelength range. The system further includes a wavelength-selective optical diffuser configured to diffuse light of the second wavelength range, wherein the shortest wavelength of the first range is larger than the longest wavelength of the second range, the ISLD is positioned such that the light to be detected by the FPA imaging detector first passes through the ISLD, and the FPA imaging detector, the ISLD and the wavelength-selective diffuser share a common optical axis.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: November 24, 2015
    Assignee: The Boeing Company
    Inventors: Daniel Yap, Oleg M. Efimov
  • Patent number: 9146157
    Abstract: A dual band detector includes a substrate, a composite barrier, a first absorber on the substrate and on a light incident side of the composite barrier, the first absorber for detecting first infrared light wavelengths, a second absorber on the composite barrier on a side opposite the light incident side, the second absorber for detecting second infrared light wavelengths, wherein a bandgap of the first absorber is larger than that of the second absorber, wherein the composite barrier includes a first secondary barrier, a primary barrier, and a second secondary barrier, wherein the first and second secondary barriers may have a lower bandgap energy than the primary barrier, wherein the first or the second secondary barrier may have a doping level and type different from that of the primary barrier, and wherein at least the primary barrier blocks majority carriers and allows minority carrier flow.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: September 29, 2015
    Assignee: HRL Laboratories, LLC
    Inventors: Rajesh Rajavel, Hasan Sharifi, Terence De Lyon, Brett Nosho, Daniel Yap
  • Patent number: 9103914
    Abstract: Optical angle of arrival sensors and methods for determining an angle of arrival of incident light are provided, wherein one sensor includes a focusing lens and an array of lateral-effect position sensing detector (LEPSD) elements. The focusing lens is configured to focus light on the array, wherein each of the LEPSD elements includes an absorber region that absorbs light of a first wavelength range that is focused on the LEPSD elements. Each of the LEPSD elements further includes at least one lateral current conducting layer that has a relatively low sheet resistance.
    Type: Grant
    Filed: December 21, 2013
    Date of Patent: August 11, 2015
    Assignee: The Boeing Company
    Inventors: Daniel Yap, Donald A. Hitko, Hasan Sharifi, Oleg M. Efimov
  • Publication number: 20150177381
    Abstract: Optical angle of arrival sensors and methods for determining an angle of arrival of incident light are provided, wherein one sensor includes a focusing lens and an array of lateral-effect position sensing detector (LEPSD) elements. The focusing lens is configured to focus light on the array, wherein each of the LEPSD elements includes an absorber region that absorbs light of a first wavelength range that is focused on the LEPSD elements. Each of the LEPSD elements further includes at least one lateral current conducting layer that has a relatively low sheet resistance.
    Type: Application
    Filed: December 21, 2013
    Publication date: June 25, 2015
    Applicant: The Boeing Company
    Inventors: Daniel Yap, Donald A. Hitko, Hasan Sharifi, Oleg M. Efimov