Patents Assigned to AOSense, Inc.
  • Patent number: 10901052
    Abstract: An atomic magnetometer system includes a laser system, a cell, and an optics setup. The laser system is configured to generate a pump beam and a probe beam. The cell encloses an atomic vapor. The optics setup is configured to route the pump beam and the probe beam. The pump beam propagates along a path through the atomic vapor and the probe beam also propagates substantially along the path through the atomic vapor. The pump beam and the probe beam traverse the atomic vapor along two or more non-parallel directions. The interaction of the pump beam with the atomic vapor is modulated at or near harmonics of a magnetic resonance frequency.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: January 26, 2021
    Assignee: AOSense, Inc.
    Inventors: Brian R. Patton, Micah Ledbetter, Ethan Pratt
  • Patent number: 10824047
    Abstract: A system for optical comb carrier envelope offset frequency control includes a mode-locked oscillator. The mode-locked oscillator produces an output beam using an input beam and one or more control signals. The output beam includes a controlled carrier envelope offset frequency. A beat note generator produces a beat note signal using a portion of the output beam. A control signal generator produces the one or more control signals to set the beat note signal by modulating the intensity of the input beam within the mode locked oscillator. Modulating the intensity comprises using a Mach-Zehnder intensity modulator or using an intensity modulated external laser to affect a gain medium within the mode-locked laser.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: November 3, 2020
    Assignee: AOSense, Inc.
    Inventors: Arman Cingoz, Dmitriy Churin, Jonathan Roslund, Miao Zhu
  • Patent number: 10535981
    Abstract: A device for preparing an ensemble of laser-cooled atoms and measuring their population includes a laser and a set of reflecting surfaces. The laser is able to produce a laser beam. The set of reflecting surfaces disposed to direct the laser beam along a multi-dimensional beam path to intersect a central space multiple times from different directions and retroreflect the laser beam to retrace the multi-dimensional beam path. The central space is able to have an ensemble of atoms or molecules. The atoms or the molecules are able to be cooled along one or more dimensions by the laser beam sent along the multi-dimensional beam path and able to be detected in the central space by an effect upon the laser beam sent along the multi-dimensional beam path.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: January 14, 2020
    Assignee: AOSense, Inc.
    Inventors: Martin M. Boyd, Adam T. Black, Brian R. Patton, Miao Zhu
  • Patent number: 10535980
    Abstract: An atomic oscillator device includes an atomic oscillator, a controlled oscillator, a resonance controller, and a cold-atom clock output. The atomic oscillator comprises a two-dimensional optical cooling region (2D OCR) for providing a source of atoms and a three-dimensional optical cooling region (3D OCR) for cooling and/or trapping the atoms emitted by the 2D OCR. The atomic oscillator comprises a microwave cavity surrounding the 3D OCR for exciting an atomic resonance. The controlled oscillator produces an output frequency. The resonance controller is for steering the output frequency of the controlled oscillator based on the output frequency and the atomic resonance as measured using an atomic resonance measurement. The cold-atom clock output is configured as being the output frequency of the controlled oscillator.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: January 14, 2020
    Assignee: AOSense, Inc.
    Inventors: Martin M. Boyd, Adam T. Black, Thang Q. Tran, Matthew D. Swallows, Brian R. Patton, Miao Zhu, Thomas H. Loftus, Mark A. Kasevich
  • Patent number: 10460917
    Abstract: A system for ion pumping including an anode, a cathode, and a magnet. The magnet comprises a Halbach magnet array.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: October 29, 2019
    Assignee: AOSense, Inc.
    Inventors: Chandra S. Raman, Thomas H. Loftus, Mark A. Kasevich, Thang Q. Tran, William D. Weis
  • Patent number: 10444016
    Abstract: A system for an atomic interferometer includes a laser control system and a feedback control system. The laser control system controls a first pointing angle of a first interrogating laser beam. The first interrogating laser beam and a second interrogating laser beam interrogate a pair of almost counter-propagating laser cooled atomic ensembles. The feedback control system adjusts the first pointing angle based at least in part on an inertial measurement using the atomic interferometer to bias an output of the atomic interferometer to compensate for the effects of rotations. The pointing angle of the laser beam, which is linearly related to a frequency used to drive an acousto-optic deflector, is linearly related to the rotation rate of the sensor.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: October 15, 2019
    Assignee: AOSense, Inc.
    Inventors: Mark A. Kasevich, Michael R. Matthews, Micah Ledbetter, Ying-Ju Wang, Martin M. Boyd
  • Patent number: 10446307
    Abstract: A device for magnetic field generation includes a flux deliverer and a field shaper.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: October 15, 2019
    Assignee: AOSense, Inc.
    Inventors: Thomas H. Loftus, Mark A. Kasevich, Arman Cingoz, Matthew Cashen
  • Patent number: 10371856
    Abstract: An atomic gravimeter device includes one or more lasers and three or more atomic sources. The three or more atomic sources are disposed to launch or drop atoms vertically. The one or more lasers are disposed to generate laser beams that interact with sets of atoms from an atomic source of the three or more atomic sources to measure accelerations of the sets of atoms. A measured value is determined for gravity using interwoven acceleration measurements of the sets of atoms from the three or more atomic sources.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: August 6, 2019
    Assignee: AOSense, Inc.
    Inventors: Mark A. Kasevich, Miroslav Y. Shverdin
  • Patent number: 10340658
    Abstract: A laser system for atomic clocks and sensors includes a single laser, an intensity splitter, a modulator, and a feedback-based lock controller. The single laser outputs a central optical frequency of laser light that can be tuned. The intensity splitter splits the laser light along a first and a second optical path. A modulator is disposed in the first optical path. The portion of laser light from the first optical path is subjected to the modulator with the modulator disposed to generate a frequency-shifted sideband from some or all of the portion of the laser light subjected to the modulator, with the frequency-shifted sideband shifted by an adjustable frequency source, resulting in an adjustable frequency offset between the frequency-shifted sideband and an unmodulated carrier propagating in the second optical path. The feedback-based lock controller locks the optical frequency of the frequency-shifted sideband to a repumping transition for atom cooling.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: July 2, 2019
    Assignee: AOSense, Inc.
    Inventors: Martin M. Boyd, Brian R. Patton
  • Patent number: 10330459
    Abstract: A light pulse interferometer includes a first atom source and a first laser. The first atom source is configured to direct a first group of atoms in a first direction. The first laser is configured to generate one or more interferometer laser beam pairs. The one or more interferometer laser beam pairs interact with the first group of atoms in an interferometer sequence of three or more pulses to produce atom interference. A first laser beam pair of the one or more interferometer laser beam pairs is disposed to interact with the first group of atoms to perform 1D-cooling and velocity control of the first group of atoms prior to the interferometer sequence.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 25, 2019
    Assignee: AOSense, Inc.
    Inventors: Michael R. Matthews, Adam T. Black, Mark A. Kasevich, Micah Ledbetter
  • Patent number: 10288428
    Abstract: An atom interferometer device for inertial sensing includes one or more thermal atomic sources, a state preparation laser, a set of lasers, and a detection laser. The one or more thermal atomic sources provide one or more atomic beams. A state preparation laser is disposed to provide a state preparation laser beam nominally perpendicular to each of the one or more atomic beams. A set of lasers is disposed to provide interrogation laser beams that interrogate the one or more atomic beams to assist in generating atom interference. A detection laser is disposed to provide a detection laser beam, which is angled at a first angle to the each of the one or more atomic beams in order to enhance the dynamic range of the device by enabling velocity selectivity of atoms used in detecting the atom interference.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: May 14, 2019
    Assignee: AOSense, Inc.
    Inventors: Arman Cingoz, Miao Zhu, Miroslav Y. Shverdin, Matthew Cashen
  • Patent number: 10274549
    Abstract: An atomic magnetometer includes a vapor cell, one or more pumping lasers, a probe laser, and a sensor. The one or more pumping lasers are disposed to direct one or more laser beams though the vapor cell to interact with atoms of an atomic vapor in the vapor cell. The atomic vapor periodically absorbs light of alternating circular polarization from the one or more laser beams. The probe laser is disposed to direct polarized light to pass through the vapor cell. The sensor is disposed to intersect the polarized light from the probe laser after passing through the vapor cell.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: April 30, 2019
    Assignee: AOSense, Inc.
    Inventors: Micah Ledbetter, Brian Patton
  • Patent number: 10107937
    Abstract: A system for gravity measurement includes one or more atom sources, two or more laser beams, and a polarizing beamsplitter and a retro-reflection prism assembly. The one or more atom sources is to provide three ensembles of atoms. The two or more laser beams is to cool or interrogate the three ensembles of atoms. The polarizing beamsplitter and the retro-reflection prism assembly are in a racetrack configuration. The racetrack configuration routes the two or more laser beams in opposing directions around a loop topology, intersecting the three ensembles of atoms with appropriate polarizations chosen for cooling or interferometer interrogation. The three ensembles of atoms are positioned coaxially when interrogated.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: October 23, 2018
    Assignee: AOSense, Inc.
    Inventors: Mark A. Kasevich, Miroslav Y. Shverdin, Adam T. Black, Todd L. Gustavson
  • Patent number: 9977311
    Abstract: A system for optical comb carrier envelope offset frequency control includes a mode-locked laser and a frequency shifter. The mode-locked laser produces a laser output. The frequency shifter shifts the laser output to produce a frequency shifted laser output based at least in part on one or more control signals. The frequency shifted laser output has a controlled carrier envelope offset frequency. The frequency shifter includes a first polarization converter, a rotating half-wave plate, and a second polarization converter.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: May 22, 2018
    Assignee: AOSense, Inc.
    Inventors: Arman Cingoz, Dmitriy Churin, Jonathan Roslund, Miao Zhu
  • Patent number: 9772175
    Abstract: A system for controlling a phase measurement in an atom interferometer comprising one or more lasers, a processor, and a memory. The one or more lasers are for providing interrogating beams. A first cloud of atoms and a second cloud of atoms traverse an interrogating region of the atom interferometer in substantially opposite directions. The interrogating beams interact substantially simultaneously with both atoms in the first cloud and atoms in the second cloud. The first cloud of atoms and the second cloud of atoms interact with each of the interrogating beams in a different order. The processor is configured to determine a phase adjustment offset of at least one interrogating beam based at least in part on one or more past interactions of one or more interrogating beams with either the first cloud of atoms or the second cloud of atoms.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: September 26, 2017
    Assignee: AOSense, Inc.
    Inventors: Adam T. Black, Todd L. Gustavson, Brenton C. Young
  • Patent number: 9019506
    Abstract: A system for controlling a phase measurement in an atom interferometer comprising one or more lasers, a processor, and a memory. The one or more lasers are for providing interrogating beams. A first group of atoms and a second group of atoms traverse an interrogating region of the atom interferometer in substantially opposite directions. The interrogating beams interact substantially simultaneously with both atoms in the first group and atoms in the second group. The first group of atoms and the second group of atoms interact with each of the interrogating beams in a different order. The processor is configured to determine a phase adjustment offset of at least one interrogating beam based at least in part on one or more past interactions of one or more interrogating beams with either the first group of atoms or the second group of atoms.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: April 28, 2015
    Assignee: AOSense, Inc.
    Inventors: Adam T. Black, Todd L. Gustavson, Brenton C. Young
  • Patent number: 8921764
    Abstract: The device for producing laser-cooled atoms comprises a two dimensional trap or a three-dimensional trap, or a combination of two- and three-dimensional traps. The two-dimensional trap comprises: three or more permanent magnets arranged around a perimeter of a loop, wherein a plane of the loop is perpendicular to a free axis of the two-dimensional atom trap, and the three or more permanent magnets bracket an internal volume of the two-dimensional atom trap; and one or more laser beam input ports enabling access for one or more laser beams to the internal volume of the two-dimensional atom trap.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: December 30, 2014
    Assignee: AOSense, Inc.
    Inventors: Thomas H. Loftus, Artyom Vitouchkine, Michael R. Matthews, Adam T. Black, Igor Teper, Leo W. Hollberg, Todd L. Gustavson, Brent C. Young
  • Patent number: 8710428
    Abstract: An atomic slower comprises a bore and one or more tapered permanent magnets configured to produce an axial magnetic field along an axis of the bore.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: April 29, 2014
    Assignee: AOSense, Inc.
    Inventors: Thomas H. Loftus, Artyom Vitouchkine, Leo Hollberg
  • Publication number: 20140061454
    Abstract: The device for producing laser-cooled atoms comprises a two dimensional trap or a three-dimensional trap, or a combination of two- and three-dimensional traps. The two-dimensional trap comprises: three or more permanent magnets arranged around a perimeter of a loop, wherein a plane of the loop is perpendicular to a free axis of the two-dimensional atom trap, and the three or more permanent magnets bracket an internal volume of the two-dimensional atom trap; and one or more laser beam input ports enabling access for one or more laser beams to the internal volume of the two-dimensional atom trap.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 6, 2014
    Applicant: AOSense, Inc.
    Inventors: Thomas H. Loftus, Artyom Vitouchkine, Michael R. Matthews, Adam T. Black, Igor Teper, Leo W. Hollberg, Todd L. Gustavson, Brent C. Young