Thomas H Loftus

US Patent:

7199924, Apr 3, 2007

Filed:

Jan 26, 2006

Appl. No.:

11/342336

Inventors:

Andrew J. W. Brown - Brier WA, US
Eric C. Honea - Seattle WA, US
Thomas H. Loftus - Seattle WA, US
Roy D. Mead - Edmonds WA, US
Charles E. Hamilton - Kenmore WA, US
Anping Liu - Big Flats NY, US
Charles A. Lemaire - Apple Valley MN, US

Assignee:

Aculight Corporation - Bothell WA

International Classification:

H04J 14/02
G02B 27/64

US Classification:

359556, 398 87

Abstract:

Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.

US Patent:

7233442, Jun 19, 2007

Filed:

Jan 26, 2006

Appl. No.:

11/342337

Inventors:

Andrew J. W. Brown - Brier WA, US
Eric C. Honea - Seattle WA, US
Thomas H. Loftus - Seattle WA, US
Roy D. Mead - Edmonds WA, US
Charles E. Hamilton - Kenmore WA, US
Anping Liu - Big Flats NY, US
Charles A. Lemaire - Apple Valley MN, US

Assignee:

Aculight Corporation - Bothell WA

International Classification:

G02B 27/64

US Classification:

359556

Abstract:

Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.

US Patent:

7535631, May 19, 2009

Filed:

May 22, 2007

Appl. No.:

11/751637

Inventors:

Andrew J. W. Brown - Brier WA, US
Eric C. Honea - Seattle WA, US
Thomas H. Loftus - Seattle WA, US
Roy D. Mead - Edmonds WA, US
Charles E. Hamilton - Kenmore WA, US
Anping Liu - Big Flats NY, US
Charles A. Lemaire - Apple Valley MN, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H04B 10/17
H01S 3/00

US Classification:

3593411, 372 6, 372102, 372108

Abstract:

Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.

US Patent:

8179594, May 15, 2012

Filed:

Jun 30, 2008

Appl. No.:

12/165651

Inventors:

Steven C. Tidwell - Kirkland WA, US
Thomas H. Loftus - Seattle WA, US
Charles A. Lemaire - Apple Valley MN, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01S 4/00
H04B 10/17

US Classification:

359349

Abstract:

Apparatus and method for spectral-beam combining of light from a plurality of high-power lasers (e. g. , fiber MOPA lasers) that, in some embodiments, use substantially identical diffraction gratings in a 1-D non-parallel, mutually compensating configuration to combine non-parallel converging input beams in one plane each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, an output grating and one or more input gratings in a 1-D parallel, mutually compensating configuration combine non-parallel input beams in one plane into a single output beam of high quality. In other embodiments, a 2-D plurality of input gratings in a non-parallel configuration combine a plurality of non-parallel input beams not in one plane each having a slightly different successively higher wavelength into a set of converging beams in one plane directed towards an output grating that compensates for chromatic dispersions introduced by the input gratings.

US Patent:

20140061454, Mar 6, 2014

Filed:

Sep 4, 2012

Appl. No.:

13/603287

Inventors:

Thomas H. Loftus - Los Gatos CA, US
Artyom Vitouchkine - Redwood City CA, US
Michael R. Matthews - Mountain View CA, US
Adam T. Black - Mountain View CA, US
Igor Teper - Redwood City CA, US
Leo W. Hollberg - Portola Valley CA, US
Todd L. Gustavson - Sunnyvale CA, US
Brent C. Young - Menlo Park CA, US

Assignee:

AOSense, Inc. - Sunnyvale CA

International Classification:

H05H 3/02

US Classification:

250251

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.

US Patent:

20220319730, Oct 6, 2022

Filed:

Feb 21, 2022

Appl. No.:

17/651840

Inventors:

- Broomfield CO, US
Thomas Howard Loftus - Lake Stevens WA, US
Brian Vincent Estey - Louisville CO, US

International Classification:

G21K 1/00
G06N 10/40
G21K 1/06
G21K 1/093

Abstract:

A loading assembly configured for providing atomic objects to an atomic object confinement apparatus is provided. The loading assembly comprises one or more ovens. Each oven (a) comprises a respective oven nozzle and (b) is configured to generate a respective atomic flux of a respective atomic species via the respective oven nozzle. The loading assembly comprises a mirror array and a magnet array configured to, when optical beams are provided to the mirror and magnet assembly, generate a two-dimensional magneto-optical trap (2D MOT). The 2D MOT is configured to generate a substantially collimated atomic beam from the respective atomic fluxes generated by the one or more ovens. The loading assembly further comprises a differential pumping tube defining a beam path. The differential pumping tube is configured to provide the substantially collimated atomic beam via the beam path. The respective oven nozzle of each of the one or more ovens is misaligned with the beam path and the 2D MOT is configured to provide the substantially collimated atomic beam in alignment with the beam path.

US Patent:

20220199391, Jun 23, 2022

Filed:

Nov 23, 2021

Appl. No.:

17/533587

Inventors:

- Broomfield CO, US
Philip MAKOTYN - Arvada CO, US
Russell STUTZ - Broomfield CO, US
Mary ROWE - Boulder CO, US
Benjamin SPAUN - Charlotte NC, US
Brian ESTEY - Charlotte NC, US
Thomas LOFTUS - Charlotte NC, US

International Classification:

H01J 49/42
G06N 10/20

Abstract:

The disclosure provides an atomic object trap apparatus and a method of operating such. The atomic object trap apparatus comprises two or more radio frequency (RF) electrodes formed concentrically in a substantially elliptical shape; and three or more trapping and/or transport (TT) electrode sequences formed concentrically in a substantially elliptical shape. The two or more RF electrodes and the three or more TT electrode sequences define a substantially elliptically-shaped atomic object trap. At least one TT electrode sequence of the three or more TT electrode sequences is disposed concentrically between the two or more RF electrodes. Each RF electrode and TT electrode sequence is elliptically shaped such that each comprises two substantially parallel longitudinal regions and two arc-spanning beltway regions, the four regions forming a substantially elliptical shape. The method is directed to operating a quantum computing system comprising an example atomic object trap apparatus.

US Patent:

20180321641, Nov 8, 2018

Filed:

Apr 30, 2018

Appl. No.:

15/967409

Inventors:

- Sunnyvale CA, US
Adam T. Black - Annandale VA, US
Thang Q. Tran - San Jose CA, US
Matthew D. Swallows - Santa Clara CA, US
Brian R. Patton - San Francisco CA, US
Miao Zhu - San Jose CA, US
Thomas H. Loftus - Arvada CO, US
Mark A. Kasevich - Palo Alto CA, US

International Classification:

G04F 5/14
H03L 7/26
H05H 3/02

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.