Karl T Nelson

US Patent:

20130213940, Aug 22, 2013

Filed:

Feb 11, 2013

Appl. No.:

13/764187

Inventors:

HONEYWELL INTERNATIONAL INC. - , US
Karl D. Nelson - Plymouth MN, US
Robert Compton - Plymouth MN, US

Assignee:

HONEYWELL INTERNATIONAL INC. - Morristown CA

International Classification:

H05B 1/00

US Classification:

219 50, 427 58

Abstract:

Embodiments described herein provide for an on-chip alkali dispenser. The on-chip alkali dispenser includes a monolithic semiconductor substrate defining a trench therein, and an evaporable metal material disposed in the trench. A heating element is disposed proximate the evaporable metal material and configured to provide heat to the evaporable metal material. A getter material is disposed to sorb unwanted materials released from the evaporable metal material.

US Patent:

20130265112, Oct 10, 2013

Filed:

Feb 5, 2013

Appl. No.:

13/759444

Inventors:

Kenneth Salit - Plymouth MN, US
Karl D. Nelson - Plymouth MN, US
Ben Luey - Denver CO, US
Mike Anderson - Denver CO, US

Assignee:

HONEYWELL INTERNATIONAL INC. - Morristown NJ

International Classification:

H03L 7/26

US Classification:

331 941

Abstract:

A method for reducing or eliminating clock bias in an atomic clock is provided. The method comprises cooling a population of atoms collected in the atomic clock using a laser locked at a predetermined frequency, turning off the laser, performing atomic clock spectroscopy, turning on the laser after the atomic clock spectroscopy, and relocking the frequency of the laser to an external reference cell. The population of atoms that are in each of two ground hyperfine levels is then probed using laser light that is on or near-resonant with a selected atomic transition.

US Patent:

20140022534, Jan 23, 2014

Filed:

Feb 4, 2013

Appl. No.:

13/758370

Inventors:

HONEYWELL INTERNATIONAL INC. - , US
Kenneth Salit - Plymouth MN, US
Mary K. Salit - Plymouth MN, US
Karl D. Nelson - Plymouth MN, US
Robert Compton - Plymouth MN, US

Assignee:

HONEYWELL INTERNATIONAL INC. - Morristown NJ

International Classification:

G01P 21/00

US Classification:

356 72

Abstract:

An apparatus for inertial sensing is provided. The apparatus comprises at least one atomic inertial sensor, and one or more micro-electrical-mechanical systems (MEMS) inertial sensors operatively coupled to the atomic inertial sensor. The atomic inertial sensor and the MEMS inertial sensors operatively communicate with each other in a closed feedback loop.

US Patent:

20220276293, Sep 1, 2022

Filed:

Jun 17, 2021

Appl. No.:

17/350901

Inventors:

- Charlotte NC, US
Karl D. Nelson - Plymouth MN, US
Neal Eldrich Solmeyer - Edina MN, US
Matthew Wade Puckett - Phoenix AZ, US

Assignee:

Honeywell International Inc. - Charlotte NC

International Classification:

G01R 29/08

Abstract:

A sensor system comprises a laser source that emits a pump beam at a first wavelength and a probe beam at a second wavelength, and an optical means for receiving the pump and probe beams. The optical means is operative to generate a plurality of light beams, each having a different frequency, from the pump and probe beams. One or more cells receive the light beams from the optical means and allow passage of the light beams therethrough, with the cells containing alkali atoms. A dichroic filter is configured to receive the light beams from the cells. The dichroic filter separates pump beam light and probe beam light from the light beams. A detector array receives the probe beam light from the dichroic filter. The detector array includes a two-dimensional array of photosensors that map out transmission of respective light beams corresponding to the probe beam light through the cells.

US Patent:

20220252400, Aug 11, 2022

Filed:

Feb 9, 2021

Appl. No.:

17/171858

Inventors:

- Charlotte NC, US
Matthew Wade Puckett - Phoenix AZ, US
Karl D. Nelson - Plymouth MN, US

Assignee:

Honeywell International Inc. - Charlotte NC

International Classification:

G01C 19/66
G01C 19/72
H01S 3/108

Abstract:

Techniques for reducing the bias error present in optical gyroscopes is disclosed. Such techniques include at least one path length adjustment member placed in an optical gyroscope resonator, which are configured to modulate the optical path length of the resonator so that bias errors attributable to the optical path length are shifted outside of the bandwidth of the optical gyroscope. In some embodiments, the at least one path length adjustment member includes a plurality of microheaters coupled to the resonator, in which case optical path length modulation is achieved by heating the resonator via the microheaters. Alternatively, a plurality of piezo-electric regions can be placed in the resonator, which enables optical path length modulation through electric field gradients applied to the piezo-electric regions.

US Patent:

20220252792, Aug 11, 2022

Filed:

May 4, 2021

Appl. No.:

17/307757

Inventors:

- Charlotte NC, US
Chad Fertig - Bloomington MN, US
Neil A. Krueger - Saint Paul MN, US
Karl D. Nelson - Plymouth MN, US
Chad Hoyt - Roseville MN, US

Assignee:

Honeywell International Inc. - Charlotte NC

International Classification:

G02B 6/34

Abstract:

A multilayer waveguide coupler comprising a first grating and a second grating is provided. Each first copropagating waveguide of the first grating has a first periodically modulated width. Each second copropagating waveguide of the second grating has a second periodically modulated width. The second grating is positioned so that a phase offset is present between the first periodically modulated width of the first copropagating waveguides and the second periodically modulated width of the second copropagating waveguides. The grating spaced distance and phase offset are selected so that light diffracted out of the first copropagating waveguides and the second copropagating waveguides in the first direction interferes constructively to form the first light beam and light diffracted out of the first copropagating waveguides and the second copropagating waveguides in the second direction interferes destructively.

US Patent:

20220216664, Jul 7, 2022

Filed:

Jan 6, 2021

Appl. No.:

17/142929

Inventors:

- Charlotte NC, US
Karl D. Nelson - Plymouth MN, US
Matthew Wade Puckett - Phoenix AZ, US

Assignee:

Honeywell International Inc. - Charlotte NC

International Classification:

H01S 3/08
H01S 3/063
H01S 3/30

Abstract:

An optical resonator device, which can be implemented in a Brillouin laser, comprises a first waveguide ring resonator having a first diameter, and one or more second waveguide ring resonators adjacent to the first waveguide ring resonator. The one or more second waveguide ring resonators each have a second diameter that is less than the first diameter. The one or more second waveguide ring resonators optically communicate with the first waveguide ring resonator, such that an optical signal in the first waveguide ring resonator optically couples into the one or more second waveguide ring resonators. The one or more second waveguide ring resonators is configured such that when the optical signal resonates within the first waveguide ring resonator and the one or more second waveguide ring resonators, the optical signal within the first waveguide ring resonator is suppressed.

US Patent:

20210384695, Dec 9, 2021

Filed:

Jun 3, 2020

Appl. No.:

16/892016

Inventors:

- Morris Plains NJ, US
Karl D. Nelson - Plymouth MN, US
Jianfeng Wu - Tucson AZ, US

Assignee:

Honeywell International Inc. - Morris Plains NJ

International Classification:

H01S 3/108
H01S 3/083
H01S 3/30
H01S 3/102

Abstract:

Systems and methods for a self-injection locked SBS laser are provided herein. In certain embodiments, a system includes a pump laser source providing a pump laser; an SBS resonator receiving the pump laser through a first port and scattering some of the pump laser to provide an SBS laser through the first port, wherein a frequency shift of Brillouin scattering within the SBS resonator is an integer multiple of a free-spectral range for the SBS resonator; a filter receiving the pump laser on a first filter port and the SBS laser on a second filter port, wherein the pump laser is output through the second filter port and the SBS laser is output through a drop port; and a pump laser path coupling the output pump laser into the pump laser source, wherein a frequency of the pump laser becomes locked to a resonance frequency of the SBS resonator.