Michael L Larsen, 55346 Palos Verdes Blvd APT 2, Redondo Beach, CA 90277

7893780, Feb 22, 2011

Jun 10, 2009

12/481709

Michael D. Bulatowicz - Canoga Park CA, US
Michael S. Larsen - Woodland Hills CA, US

Northrop Grumman Guidance and Electronic Company, Inc. - Los Angeles CA

H03L 7/26
H03B 17/00

331 941, 331 3

One embodiment of the invention includes an alkali beam cell system that comprises a reversible alkali beam cell. The reversible alkali beam cell includes a first chamber configured as a reservoir chamber that is configured to evaporate an alkali metal during a first time period and as a detection chamber that is configured to collect the evaporated alkali metal during a second time period. The reversible alkali beam cell also includes a second chamber configured as the detection chamber during the first time period and as the reservoir chamber during the second time period. The reversible alkali beam cell further includes an aperture interconnecting the first and second chambers and through which the alkali metal is allowed to diffuse.

7965148, Jun 21, 2011

Aug 3, 2009

12/534615

Michael S. Larsen - Woodland Hills CA, US

Northrop Grumman Guidance and Electronics Company, Inc. - Los Angeles CA

H01S 1/06
H03B 17/00

331 941, 331 3

One embodiment of the invention includes an atomic clock system including an alkali beam cell and an interrogation system configured to generate an optical pump beam and at least one optical probe beam that illuminate a detection chamber of the beam cell to pump evaporated alkali metal atoms. An optical detection system can provide a microwave signal to the detection chamber and can measure an intensity of the optical pump beam to determine a transition frequency corresponding to optimum photon absorption of the evaporated alkali metal atoms. A photodetection system can measure an intensity of the at least one optical probe beam and to generate an intensity signal that is provided to the optical detection system to substantially cancel Doppler broadening of the transition frequency resulting from non-orthogonal planar movement of the evaporated alkali metal atoms relative to the optical pump beam and the at least one optical probe beam.

8159220, Apr 17, 2012

Aug 3, 2009

12/534641

Michael D. Bulatowicz - Canoga Park CA, US
Michael S. Larsen - Woodland Hills CA, US
Robert Griffith - Woodland Hills CA, US

Northrop Grumman Guidance and Electronics Company, Inc. - Woodland Hills CA

G01V 3/00

324304, 324305

One embodiment of the invention includes a nuclear magnetic resonance (NMR) gyroscope system. The system includes a gyro cell that is sealed to enclose an alkali metal vapor, a first gyromagnetic isotope, a second gyromagnetic isotope, and a third gyromagnetic isotope. The system also includes a magnetic field generator configured to generate a substantially uniform magnetic field that is provided through the gyro cell to cause the first, second, and third gyromagnetic isotopes to precess. The system further includes an angular rotation sensor configured to measure a rotation angle about a sensitive axis of the NMR gyroscope system based on measured precession angles of the first, second, and third gyromagnetic isotopes.

8237105, Aug 7, 2012

Feb 3, 2011

13/020432

Michael D. Bulatowicz - Canoga Park CA, US
Michael S. Larsen - Woodland Hills CA, US

Northrop Grumman Guidance & Electronics Company, Inc. - Woodland Hills CA

H05H 3/00
H05H 3/02
H01S 3/00

250251, 31511141, 331 3

One embodiment of the invention includes a magneto-optical trap (MOT) housing substantially surrounding atoms in an atom trapping region. The housing includes a first end that is substantially open to receive light that is substantially collimated and a second end opposite the first end that includes an aperture that emits a cold atom beam from the atom trapping region. The housing also includes a housing section surrounding and extending along a substantially central axis having a substantially reflective interior peripheral surface that reflects the light to generate an optical force on the atoms. The housing further includes an optical mask located substantially at the first end and along the substantially central axis that is configured to occlude the atom trapping region from the light to substantially prevent direct illumination of the atoms by unreflected light.

8330566, Dec 11, 2012

Feb 2, 2009

12/364189

Michael D. Bulatowicz - Canoga Park CA, US
Michael S. Larsen - Chatsworth CA, US

Northrop Grumman Guidance and Electronics Company, Inc. - Woodland Hills CA

H01F 5/00

335299, 335216

One embodiment of the invention includes a magnetic solenoid. The magnetic solenoid includes an elongated sidewall that extends between spaced apart ends. The elongated sidewall can surround a central axis that extends longitudinally along the sidewall. The elongated sidewall can have a radius that is defined by a compound equation that varies the radius as a function of position along the central axis.

8600691, Dec 3, 2013

Jan 21, 2011

13/011530

Robert C. Griffith - Woodland Hills CA, US
Michael S. Larsen - Woodland Hills CA, US
Michael D. Bulatowicz - Canoga Park CA, US

Northrop Grumman Guidance and Electronics, Inc. - Woodland Hills CA

G01C 17/38
G01V 3/00

702 92, 324302

One embodiment of the invention includes a nuclear magnetic resonance (NMR) gyroscope system. The system includes a gyro cell that is sealed to enclose an alkali metal vapor, a first gyromagnetic isotope, and a second gyromagnetic isotope. A magnetic field generator configured to generate a magnetic field that is provided through the gyro cell to cause the first and the second gyromagnetic isotopes to precess. A magnetic field error controller configured to measure an error associated with a magnitude of the magnetic field and to generate an error signal that is fed back to the magnetic field generator to maintain the magnetic field at a desired magnitude. The system further includes a mechanization processor configured to calculate a rotation angle about a sensitive axis of the NMR gyroscope system based on a measured precession angle of at least one of the first and second gyromagnetic isotopes and the error signal.

2013032, Dec 12, 2013

May 31, 2013

13/907333

A. DOUGLAS MEYER - WOODLAND HILLS CA, US
MICHAEL D. BULATOWICZ - CANOGA PARK CA, US
MICHAEL S. LARSEN - WOODLAND HILLS CA, US
ROBERT C. GRIFFITH - WOODLAND HILLS CA, US

NORTHROP GRUMMAN SYSTEMS CORPORATION - FALLS CHURCH VA

G01P 15/093

7351427

One embodiment includes an accelerometer system. The system includes a laser configured to emit an optical beam at a linear polarization. The system also includes an optical cavity system. The optical cavity system includes a minor that is coupled to an accelerometer housing via a spring and is configured to reflect the optical beam. The optical cavity system also includes at least one photodetector configured to receive at least a portion of at least one of the optical beam and the reflected optical beam and to generate an acceleration signal that is indicative of motion of the mirror resulting from an external acceleration acting upon the accelerometer housing. The system further includes an acceleration processor configured to calculate a magnitude of the external acceleration based on the acceleration signal.

2013032, Dec 12, 2013

May 31, 2013

13/907293

MICHAEL S. LARSEN - WOODLAND HILLS CA, US
HENRY C. ABBINK - WESTLAKE VILLAGE CA, US
THAD G. WALKER - MADISON WI, US
MICHAEL D. BULATOWICZ - CANOGA PARK CA, US

NORTHROP GRUMMAN SYSTEMS CORPORATION - FALLS CHURCH VA

G01R 33/26

324304

One embodiment includes a nuclear magnetic resonance (NMR) sensor system. The system includes a pump laser configured to generate an optical pump beam at a first wavelength and a probe laser configured to generate an optical probe beam at a second wavelength that is different from the first wavelength. The system also includes beam optics configured to direct the pump laser and the probe laser along orthogonal axes through a sensor cell comprising an alkali metal vapor. The system further includes detection optics that include a photodetector assembly configured to measure at least one characteristic associated with the optical probe beam leaving the sensor cell for measurement of a polarization vector of the alkali metal vapor. The detection optics can include at least one filter configured to filter light having the first wavelength and to pass light having the second wavelength to the photodetector assembly.