Patents by Inventor Scott Diddams

Scott Diddams 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: 10931077
    Abstract: An optical reference cavity includes: a cell that includes: a cylindrical body; end faces; an optical canal having an interior cylindrical geometry; and an exterior surface having an exterior cylindrical geometry; mirrors disposed on the end faces; an aspect ratio that is less than 1; a compression clamp that holds the cell through compression and includes compression platens disposed on the end faces so that the compression platens exert a compressive force to the end faces at a radius from a central axis of the cell so that the cell is compressed by the compression clamp, and a length of the optical canal is unperturbed to first order with a magnitude of the compressive force; and a compression intermediary interposed between the compression platens and end faces, wherein the length of the optical canal is insensitive to vibration coupled to the cell by the compression clamp and compression intermediaries.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: February 23, 2021
    Assignee: GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
    Inventors: Franklyn Quinlan, Scott Diddams, Andrew Ludlow, Frederick Baynes, Josue Davila-Rodriguez
  • Publication number: 20200064708
    Abstract: Apparatus and methods for generating mid-IR frequency combs using intra-pulse DFG. A mode-locked pulse generation laser generates near-IR pulses which are amplified. The amplified pulses are spectrally broadened by a nonlinear element, for example a normal dispersion highly nonlinear fiber (ND-HNLF) to generate broadened pulses. The nonlinear spectral broadening element is a transparent dielectric material having a cubic nonlinear response. Broadened pulses are temporally compressed to generate short, high-power pulses which few-cycle conditioned pulses which are ready for the intrapulse DFG process. The DFG block generates a mid-IR comb by difference frequency generation. It might comprise an orientation patterned GaP (OP-GaP) crystal or a poled lithium niobate (PPLN) crystal.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 27, 2020
    Inventors: Scott Diddams, Henry Timmers, Abijith J. Kowligy, Alexander Jacob Lind, Scott Papp
  • Publication number: 20190252848
    Abstract: An optical reference cavity includes: a cell that includes: a cylindrical body; end faces; an optical canal having an interior cylindrical geometry; and an exterior surface having an exterior cylindrical geometry; mirrors disposed on the end faces; an aspect ratio that is less than 1; a compression clamp that holds the cell through compression and includes compression platens disposed on the end faces so that the compression platens exert a compressive force to the end faces at a radius from a central axis of the cell so that the cell is compressed by the compression clamp, and a length of the optical canal is unperturbed to first order with a magnitude of the compressive force; and a compression intermediary interposed between the compression platens and end faces, wherein the length of the optical canal is insensitive to vibration coupled to the cell by the compression clamp and compression intermediaries.
    Type: Application
    Filed: February 13, 2019
    Publication date: August 15, 2019
    Inventors: Franklyn Quinlan, Scott Diddams, Andrew Ludlow, Frederick Baynes, Josue Davila-Rodriguez
  • Patent number: 10067031
    Abstract: A dual-comb optical-frequency comb generator includes a tunable comb-generating laser, a coarse-comb generator, a fine-comb generator, a second harmonic generator, a coarse-comb offset photodetector, a dual-comb offset photodetector, and a fine-comb photodetector. The coarse comb is self-referencing and coupled to the fine comb so as to enable absolute determination of the frequencies of the fine comb.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: September 4, 2018
    Assignees: CALIFORNIA INSTITUTE OF TECHNOLOGY, THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, THE UNITED STATES OF AMERICA
    Inventors: Kerry Vahala, John E. Bowers, Kartik A. Srinivasan, Scott B. Papp, Scott A. Diddams
  • Patent number: 10050722
    Abstract: A signal generator includes an optical pulse source to provide a plurality of optical pulses; a photosensitive element configured to receive optical pulses and to produce an electrical signal from optical pulses 6, electrical signal 10 including a spectrum that includes a plurality of discrete frequencies that occur at a repetition rate corresponding to that of the optical pulses or a harmonic thereof; a frequency selector to receive the electrical signal from the photosensitive element, to select dynamically the harmonic from the electrical signal and to communicate the dynamically selected harmonic; a direct digital synthesizer (DDS) to receive the harmonic of the electrical signal from the frequency selector and to produce a first output; and a frequency converter to receive the harmonic from the frequency selector and the first output from the DDS, wherein the frequency converter shifts a frequency of the harmonic by an amount substantially equal to a frequency of the first output from the DDS to produce
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: August 14, 2018
    Assignee: The United States of America, as Represented by the Secretary of Commerce
    Inventors: Franklyn J. Quinlan, Scott Diddams, Tara Fortier, Antoine Rolland
  • Patent number: 10048567
    Abstract: An electronic light synthesizer electronically synthesizes supercontinuum light and includes: a microwave modulator that: receives a continuous wave light including an optical frequency; modulates the continuous wave light at a microwave repetition frequency; and produces a frequency comb modulated at the microwave repetition frequency; a self-phase modulator that: receives the frequency comb; spectrally broadens an optical wavelength range of the frequency comb; and produces broadened light modulated at the microwave repetition frequency; an optical filter that: receives the broadened light from the self-phase modulator; and optically filters electronic noise in the broadened light; and a supercontinuum generator that: receives the broadened light from the optical filter; spectrally broadens the optical wavelength range of the broadened light; and produces supercontinuum light modulated at the microwave repetition frequency.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: August 14, 2018
    Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
    Inventors: Scott Papp, Scott Diddams, Katja Beha, Daniel Cole
  • Patent number: 10009103
    Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2?N2fM. The optical detector generates a beat note at (v2?N2fM)?(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: June 26, 2018
    Assignees: CALIFORNIA INSTITUTE OF TECHNOLOGY, THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
    Inventors: Kerry Vahala, Scott Diddams, Jiang Li, Xu Yi, Hansuek Lee
  • Publication number: 20180095003
    Abstract: A dual-comb optical-frequency comb generator includes a tunable comb-generating laser, a coarse-comb generator, a fine-comb generator, a second harmonic generator, a coarse-comb offset photodetector, a dual-comb offset photodetector, and a fine-comb photodetector. The coarse comb is self-referencing and coupled to the fine comb so as to enable absolute determination of the frequencies of the fine comb.
    Type: Application
    Filed: May 8, 2017
    Publication date: April 5, 2018
    Inventors: Kerry Vahala, John E. Bowers, Kartik A. Srinivasan, Scott B. Papp, Scott A. Diddams
  • Publication number: 20170277017
    Abstract: An electronic light synthesizer electronically synthesizes supercontinuum light, the electronic light synthesizer and includes: a microwave modulator that: receives a continuous wave light including an optical frequency; modulates the continuous wave light at a microwave repetition frequency; and produces a frequency comb including the optical frequency and modulated at the microwave repetition frequency; a self-phase modulator in optical communication with the microwave modulator and that: receives the frequency comb from the microwave modulator; spectrally broadens an optical wavelength range of the frequency comb; and produces broadened light including the optical frequency and modulated at the microwave repetition frequency; an optical filter in optical communication with the self-phase modulator and that: receives the broadened light from the self-phase modulator; and optically filters electronic noise in the broadened light; and a supercontinuum generator in optical communication with the optical filter
    Type: Application
    Filed: March 20, 2017
    Publication date: September 28, 2017
    Inventors: SCOTT PAPP, SCOTT DIDDAMS, KATJA BEHA, DANIEL COLE
  • Publication number: 20170012705
    Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2?N2fM. The optical detector generates a beat note at (v2?N2fM)?(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
    Type: Application
    Filed: August 11, 2016
    Publication date: January 12, 2017
    Inventors: Kerry VAHALA, Scott DIDDAMS, Jiang LI, Xu YI, Hansuek LEE
  • Patent number: 9450673
    Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2?N2fM. The optical detector generates a beat note at (v2?N2fM)?(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: September 20, 2016
    Assignees: CALIFORNIA INSTITUTE OF TECHNOLOGY, THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE, THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY
    Inventors: Kerry Vahala, Scott Diddams, Jiang Li, Xu Yi, Hansuek Lee
  • Patent number: 9341781
    Abstract: An apparatus and technique are used to fabricate optical microresonators. A fabrication chamber contains all fabrication materials and devices. The microresonators are fabricated from a glass preform mounted on a motorized spindle. A laser is focused onto the preform to partly or fully impinge on the preform. The laser's focus position is controlled by changing the positioning of a lens mounted on a translation stage. Piezoelectric control elements may be mounted to finished microresonators to control of nonlinear parametric oscillation and four-wave mixing effects of the microresonator, control of nonlinear optical stimulated Brillouin scattering and Raman effects of said microresonator and wideband tuning of the frequency spacing between the output modes of a nonlinear-Kerr-effect optical frequency comb generated with said microresonator.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: May 17, 2016
    Assignee: The United States of America, as represented by the Secretary of Commerce The National Institute of Standards & Technology
    Inventors: Scott Diddams, Scott Papp, Pascal Del'Haye
  • Publication number: 20160043810
    Abstract: A signal generator includes an optical pulse source to provide a plurality of optical pulses; a photosensitive element configured to receive optical pulses and to produce an electrical signal from optical pulses 6, electrical signal 10 including a spectrum that includes a plurality of discrete frequencies that occur at a repetition rate corresponding to that of the optical pulses or a harmonic thereof; a frequency selector to receive the electrical signal from the photosensitive element, to select dynamically the harmonic from the electrical signal and to communicate the dynamically selected harmonic; a direct digital synthesizer (DDS) to receive the harmonic of the electrical signal from the frequency selector and to produce a first output; and a frequency converter to receive the harmonic from the frequency selector and the first output from the DDS, wherein the frequency converter shifts a frequency of the harmonic by an amount substantially equal to a frequency of the first output from the DDS to produce
    Type: Application
    Filed: September 30, 2015
    Publication date: February 11, 2016
    Inventors: FRANKLYN J. QUINLAN, SCOTT DIDDAMS, TARA FORTIER, ANTOINE ROLLAND
  • Publication number: 20150236784
    Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2?N2fM. The optical detector generates a beat note at (v2?N2fM)?(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
    Type: Application
    Filed: January 26, 2015
    Publication date: August 20, 2015
    Inventors: Kerry Vahala, Scott Diddams, Jiang Li, Xu Yi, Hansuek Lee
  • Publication number: 20140090425
    Abstract: An apparatus and technique are used to fabricate optical microresonators. A fabrication chamber contains all fabrication materials and devices. The microresonators are fabricated from a glass preform mounted on a motorized spindle. A laser is focused onto the preform to partly or fully impinge on the preform. The laser's focus position is controlled by changing the positioning of a lens mounted on a translation stage. Piezoelectric control elements may be mounted to finished microresonators to control of nonlinear parametric oscillation and four-wave mixing effects of the microresonator, control of nonlinear optical stimulated Brillouin scattering and Raman effects of said microresonator and wideband tuning of the frequency spacing between the output modes of a nonlinear-Kerr-effect optical frequency comb generated with said microresonator.
    Type: Application
    Filed: September 9, 2013
    Publication date: April 3, 2014
    Applicant: The United States of America as represented by the Secretary of Commerce
    Inventors: Scott Diddams, Scott Papp, Pascal Del'Haye
  • Patent number: 6850543
    Abstract: Disclosed is a system and method for stabilizing the carrier-envelope phase of the pulses emitted by a femtosecond mode-locked laser by using the powerful tools of frequency-domain laser stabilization. Control of the pulse-to-pulse carrier-envelope phases was confirmed using temporal cross correlation. This phase stabilization locks the absolute frequencies emitted by the laser, which is used to perform absolute optical frequency measurements that were directly referenced to a stable microwave clock.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: February 1, 2005
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Steven T. Cundiff, John L. Hall, Scott A. Diddams, David J. Jones
  • Publication number: 20040017833
    Abstract: Disclosed is a system and method for stabilizing the carrier-envelope phase of the pulses emitted by a femtosecond mode-locked laser by using the powerful tools of frequency-domain laser stabilization. Control of the pulse-to-pulse carrier-envelope phases was confirmed using temporal cross correlation. This phase stabilization locks the absolute frequencies emitted by the laser, which is used to perform absolute optical frequency measurements that were directly referenced to a stable microwave clock.
    Type: Application
    Filed: September 27, 2002
    Publication date: January 29, 2004
    Inventors: Steven T. Cundiff, John L. Hall, Scott A. Diddams, David J. Jones
  • Patent number: 6025911
    Abstract: A measuring device completely determines the characteristics of light pulses in a beam of ultrashort light pulses using optoelectronic detectors instead of second harmonic generating crystals. An optical system provides a spatial dispersion of an ultrashort pulse in at least one dimension. A two slit filter intercepts the dispersed beam whereby the transmitted spectra combine to provide a beat frequency within selected limits. An optoelectronic detector detects the beat frequency and outputs a signal functionally related to the beat frequency that contains spectral phase information that is sufficient to characterize the pulse. In another embodiment, a beam splitter splits the beam into first and second beams, wherein one of the beams is time delayed and the other beam is spectrally dispersed. The two beam are recombined to provide information about the spectral phase of the ultrashort pulse. The pulse is completely characterized when the spectral phase information is combined with amplitude information.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: February 15, 2000
    Assignee: University of New Mexico
    Inventors: Scott A. Diddams, Jean-Claude M. Diels, Prien Steffen