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: 7266279
    Abstract: An apparatus and methods for an optically pumped laser that has a cascade of light-emitting interband transitions are disclosed. The apparatus disclosed contains multistep interband cascade regions able to generate a plurality of photons for a pump photon absorbed from an optical pump source. The methods disclosed teach how to produce a plurality of photons for a pump photon absorbed from an optical pump source.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: September 4, 2007
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, David Chow, Authi Narayanan
  • Publication number: 20070172176
    Abstract: Optical bond-wire interconnections between microelectronic chips, wherein optical wires are bonded onto microelectronic chips. Such optical connections offer numerous advantages compared to traditional electrical connections. Among other things, these interconnections are insensitive to electromagnetic interference and need not be located at the edges of a chip but rather can be placed for optimal utility to the circuit function. In addition, such interconnections can be given the same or other pre-specified lengths regardless of the placement in the module and they are capable of signal bandwidths up to 20 Gigahertz without causing a cross-talk problem. A method of fabrication of such optical interconnections using optical fiber, a laser or photodetector and etched mirror and etched V-shaped grooves.
    Type: Application
    Filed: March 19, 2007
    Publication date: July 26, 2007
    Inventors: Daniel Yap, Michael Yung
  • Patent number: 7207728
    Abstract: Optical bond-wire interconnections between microelectronic chips, wherein optical wires are bonded onto microelectronic chips. Such optical connections offer numerous advantages compared to traditional electrical connections. Among other things, these interconnections are insensitive to electromagnetic interference and need not be located at the edges of a chip but rather can be placed for optimal utility to the circuit function. In addition, such interconnections can be given the same or other pre-specified lengths regardless of the placement in the module and they are capable of signal bandwidths up to 20 Gigahertz without causing a cross-talk problem. A method of fabrication of such optical interconnections using optical fiber, a laser or photodetector and etched mirror and etched V-shaped grooves.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: April 24, 2007
    Assignees: HRL Laboratories, LLC, Hughes Electronic Corporation
    Inventors: Daniel Yap, Michael Yung
  • Patent number: 7181093
    Abstract: The present invention provides a RF-lightwave modulator with improved efficiency by making use of a broken loop resonator having a gap therein. In the present invention a RF input signal is coupled into a broken loop resonator, thereby producing a RF output signal. An optical modulator connected across the gap receives the RF output signal and modulates a lightwave with the RF output signal to produce a RF modulated lightwave. Because the optical modulator is connected across the gap in the broken loop resonator, the voltage of the RF output signal applied to the optical modulator will be greater than the voltage of the RF input signal applied to the broken loop resonator.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: February 20, 2007
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Peter Petre, Joseph S. Colburn
  • Patent number: 7167614
    Abstract: A limiter for limiting selected frequency components by generating Stokes waves in a stimulated Brillouin scattering medium. The generated Stokes waves create a seed that is provided to another stimulated Brillouin scattering medium. The seed selecting the undesired frequency components to be attenuated.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: January 23, 2007
    Assignee: HRL Laboratories, LLC
    Inventors: Metin S. Mangir, Daniel Yap, Willie W. Ng
  • Patent number: 7088886
    Abstract: A limiter for limiting selected frequency components by generating Stokes waves in a stimulated Brillouin scattering medium. The generated Stokes waves create a seed that is provided to another stimulated Brillouin scattering medium. The seed selecting the undesired frequency components to be attenuated.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: August 8, 2006
    Assignee: HRL Laboratories, LLC
    Inventors: Metin S. Mangir, Daniel Yap, Willie W. Ng
  • Patent number: 7084811
    Abstract: An antenna beamformer consisting of optical irises coupled to Wavelength Division Multiplexers (WDMs). The ports of the WDMs are coupled to lens ports, where each lens port corresponds to a different antenna beam. The optical irises are optical filters with selectable center frequencies and selectable passband widths. Selection of different center frequencies and passband widths enables the selection of different ports of the WDMs, which allows the selection of one or more antenna beams. The beamformer may also have controllable delay lines to provide for additional beam steering.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: August 1, 2006
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 7085499
    Abstract: A waveform synthesizer comprising for synthesizing RF lightwave waveforms in the optical domain. These waveforms are constructed by generating their constituent Fourier frequency components or tones and then adjusting the amplitudes of those frequency components or tones. The apparatus includes: a RF-lightwave frequency-comb generator; and a multi-tone, frequency selective amplitude modulator coupled to the RF-lightwave frequency-comb generator for generating a continuous-wave comb comprising a set of RF tones amplitude modulated onto a lightwave carrier.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: August 1, 2006
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Keyvan Sayyah
  • Publication number: 20060165336
    Abstract: A limiter for limiting selected frequency components by generating Stokes waves in a stimulated Brillouin scattering medium. The generated Stokes waves create a seed that is provided to another stimulated Brillouin scattering medium. The seed selecting the undesired frequency components to be attenuated.
    Type: Application
    Filed: March 28, 2006
    Publication date: July 27, 2006
    Inventors: Metin Mangir, Daniel Yap, Willie Ng
  • Patent number: 7057716
    Abstract: A merged dual flipped White Cell including a White Cell having upper and lower cell regions; an optical deflector array for selectively deflecting light to either an upper image plane associated with said upper region or to a lower image plane associated with said lower region; a plurality of optical delay lines for receiving and returning delayed light at said upper image plane; and a plurality of reference mirrors and optical input and output ports in optical communication with said deflector array and with said plurality of delay lines. A wavelength tapped delay White Cell including a White Cell optical cavity having a flat mirror plane on a first side thereof and curved mirrors on a second side thereof, the flat mirror plane having an array of frequency-selective taps. Also disclosed are cascaded antenna beamforming systems comprising one or more merged dual flipped White Cells and/or one or more wavelength tapped delay White Cells.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: June 6, 2006
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 7053814
    Abstract: An apparatus for preparing a RF radar transmit waveform and for decoding RF return waveforms comprising: a RF-lightwave encoder and a decoding preprocessor to phase-encode the RF radar transmit waveform and partially decode the return signal, the encoder including switched optical delay lines for producing desired RF phase shifts, and the decoding preprocessor including a tapped optical delay line and optical delay lines that counteract the delays imposed by the delay lines of the encoder, wherein the RF-lightwave encoder and the decoders allow shorter compressed pulses and larger pulse-compression ratios to be achieved than can be obtained using conventional electronic approaches. Wideband transmit waveforms can be generated due to the use of the switched optical delay lines and, unlike prior art approaches, is not restricted to single-frequency waveforms. The taps can be weighted to accomplish objectives such as reduction of side lobes in the compressed pulse.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: May 30, 2006
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 7016421
    Abstract: A Delta-Sigma Analog-to-Digital Converter (ADC) that can have a very high sampling rate (over 100 GHz) and which is preferably optically sampled to help achieve its very high sampling rate. The sampling rate can be many times higher than the regeneration speed of the electronic quantizers used in the ADC.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: March 21, 2006
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, Joseph F. Jensen
  • Patent number: 6963442
    Abstract: A frequency synthesizer for generating a multiple tone lightwave signal that can be converted into an RF carrier or local oscillator signal. The frequency synthesizer comprises a multiple mode master laser, two slave lasers injection-locked to the master laser, an optical coupler coupling the optical outputs of the two slave lasers, which produces an optical heterodyne output. The frequency synthesizer further comprises a homodyne phase-lock loop providing feedback control over one of the slave lasers and a heterodyne phase-lock loop providing feedback control over the other slave laser. A local oscillator selector is used to select the optical mode to which one of the slave lasers is locked, thus providing selection of the frequencies of the heterodyne output.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: November 8, 2005
    Assignees: HRL Laboratories, LLC, Raytheon Company
    Inventors: Daniel Yap, Yiu-Man So
  • Publication number: 20050163171
    Abstract: The present invention relates to a laser transmitter capable of being configured to transmit one of a plurality of wavelengths. Specifically, the laser transmitter may be reconfigured using the resonance passbands of a tunable microresonator coupled with a fixed grating.
    Type: Application
    Filed: January 27, 2004
    Publication date: July 28, 2005
    Inventors: Willie Ng, Robert Hayes, Daniel Yap
  • Publication number: 20050156778
    Abstract: An apparatus for preparing a RF radar transmit waveform and for decoding RF return waveforms comprising: a RF-lightwave encoder and a decoding preprocessor to phase-encode the RF radar transmit waveform and partially decode the return signal, the encoder including switched optical delay lines for producing desired RF phase shifts, and the decoding preprocessor including a tapped optical delay line and optical delay lines that counteract the delays imposed by the delay lines of the encoder, wherein the RF-lightwave encoder and the decoders allow shorter compressed pulses and larger pulse-compression ratios to be achieved than can be obtained using conventional electronic approaches. Wideband transmit waveforms can be generated due to the use of the switched optical delay lines and, unlike prior art approaches, is not restricted to single-frequency waveforms. The taps can be weighted to accomplish objectives such as reduction of side lobes in the compressed pulse.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 21, 2005
    Inventor: Daniel Yap
  • Patent number: 6906309
    Abstract: A multi-tone photonic oscillator comprises a laser; an optical modulator coupled to the laser; and a delay line and a photodetector coupled to the optical modulator for generating a delayed electrical signal representation of the output of the optical modulator; wherein the optical modulator being responsible for the delayed electrical signal for generating multiple tones where the frequency intervals of the tones is a function of the amount of delay imposed by the delay line.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: June 14, 2005
    Assignee: HRL Laboratories, LLC
    Inventors: Keyvan Sayyah, Daniel Yap
  • Publication number: 20050088339
    Abstract: A merged dual flipped White Cell including a White Cell having upper and lower cell regions; an optical deflector array for selectively deflecting light to either an upper image plane associated with said upper region or to a lower image plane associated with said lower region; a plurality of optical delay lines for receiving and returning delayed light at said upper image plane; and a plurality of reference mirrors and optical input and output ports in optical communication with said deflector array and with said plurality of delay lines. A wavelength tapped delay White Cell including a White Cell optical cavity having a flat mirror plane on a first side thereof and curved mirrors on a second side thereof, the flat mirror plane having an array of frequency-selective taps. Also disclosed are cascaded antenna beamforming systems comprising one or more merged dual flipped White Cells and/or one or more wavelength tapped delay White Cells.
    Type: Application
    Filed: October 28, 2003
    Publication date: April 28, 2005
    Inventor: Daniel Yap
  • Patent number: 6872985
    Abstract: An optoelectronic device and a method of making same. The optoelectronic device comprises a substrate, at least one dielectric waveguide in the substrate, and at least one active semiconductor layer physically bonded to the substrate and optically coupled to the at least one dielectric waveguide in the substrate, the at least one active semiconductor layer being able to generate light, detect light, amplify light or otherwise modulate amplitude or phase of light.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: March 29, 2005
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 6867904
    Abstract: An apparatus containing an integrated optical circuit that enhances phase stability of the injection-locking process of two slave lasers. The integrated optical circuit helps to reduce phase noise by keeping environmental or mechanical perturbations uniform everywhere on that circuit. Also, the integrated optical circuit provides connections for additional components to be coupled, which can monitor and control the performance characteristics of the integrated optical circuit and the injection-locking process.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: March 15, 2005
    Assignee: HRL Laboratories, LLC
    Inventors: Willie W. Ng, Daniel Yap
  • Patent number: 6852556
    Abstract: An optoelectronic device and a method of making same. The optoelectronic device comprises a substrate, at least one dielectric waveguide in the substrate, and at least one active semiconductor layer physically bonded to the substrate and optically coupled to the at least one dielectric waveguide in the substrate, the at least one active semiconductor layer being able to generate light, detect light, amplify light or otherwise modulate amplitude or phase of light.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: February 8, 2005
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap