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公开(公告)号：US20250003751A1
公开(公告)日：2025-01-02
申请号：US18885420
申请日：2024-09-13
Applicant: Anello Photonics, Inc.
Inventor： Nathan Abrams , Mario Paniccia , Mike Horton
Abstract: One or more phase modulators in an optical gyroscope operate on two counter-propagating beams to introduce a phase shift between the beams before the beams are interferometrically combined to generate a rotation signal. A signal generator generates first and second modulation frequencies to drive the phase modulators. The first modulation frequency in isolation biases the rotation signal at an operating point sensitive to rotation, and the second modulation frequency in isolation biases the rotation signal at an operating point insensitive to rotation. One or more control integrated circuits (ICs) isolate a first portion of the rotation signal associated with the first modulation frequency and a second portion of the rotation signal associated with the second modulation frequency. The control ICs determine a difference between the first and second portions of the rotation signal to remove one or more bias instabilities from the first portion of the rotation signal.
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2.发明授权公开(公告)号：US12181283B2
公开(公告)日：2024-12-31
申请号：US17832615
申请日：2022-06-04
Applicant: THALES
Inventor： Benjamin Wirtschafter , Matthieu Dupont-Nivet
IPC: G01C19/64
Abstract: An atom chip (Ach) for an ultra-cold atom sensor, includes a measurement plane XY of the atom chip comprising: a plurality of first pairs of waveguides, a plurality of second pairs of waveguides, the projections in the plane XY of the first pair furthest from X and of the second pair furthest from Y′ forming, at their intersection, a parallelogram with a centre O, a first conductive wire having a projection in the plane XY along X or Y′ or a diagonal of the parallelogram, the first conductive wire being designed to be flowed through by a DC current, the first wire having a flaring so as to take the form of a surface whose projection in the plane XY incorporates the parallelogram and exhibits symmetry about the point O.
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公开(公告)号：US12138613B2
公开(公告)日：2024-11-12
申请号：US17935878
申请日：2022-09-27
Applicant: Honeywell International Inc.
Inventor： John Downs , Mahdi Mohajeri , Dean Eivind Johnson
Abstract: Systems and methods for oxide-based doping of an evaporable getter are described herein. In certain embodiments, a method includes mixing a first getter material with a second getter material to create a mixed getter material. The method also includes mixing an oxide dopant with the mixed getter material to create a doped getter material. Further, the method includes sealing the doped getter material within a device. Moreover, the method includes applying heat to the doped getter material to cause the doped getter material to emit a doped gas for deposition on internal surfaces of the device.
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4.发明授权公开(公告)号：US11803013B2
公开(公告)日：2023-10-31
申请号：US17710847
申请日：2022-03-31
Applicant: Anello Photonics, Inc.
Inventor： Avi Feshali , Warren Bruce Jin , Mario Paniccia
CPC classification number: G02B6/13 , G01C19/64 , G02B6/12004
Abstract: Aspects of the present disclosure are directed to fabrication of large-footprint chips having integrated photonic components comprising low-loss optical waveguides. The large footprint chips require the use of multiple reticles during fabrication. Stitching adjacent reticle fields seamlessly is accomplished by overlaying into adjacent reticle fields, tapering waveguide ends, and using strategically placed alignment marks in the die.
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5.发明公开公开(公告)号：US20230332892A1
公开(公告)日：2023-10-19
申请号：US18011513
申请日：2021-06-18
Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE , OBSERVATOIRE DE PARIS , SORBONNE UNIVERSITE
Inventor： Carlos GARRIDO ALZAR
Abstract: A device for measuring a quantity representative of a population (N) of cold atoms, the cold atoms being located in a cloud of cold atoms to be analyzed, the device includes a microwave source configured to generate an incident signal at a predetermined signal frequency, a microwave guide configured to propagate the incident signal and an antenna configured to emit the incident signal to the cloud of cold atoms and its environment, the antenna and the microwave guide also being able to recover an atomic reflected signal resulting from a reflection of the incident signal by the cloud and its environment, and which propagates in the waveguide in the opposite direction to the incident signal, a splitting device coupled to the microwave guide and configured to extract at least part of the atomic reflected signal, a detector configured to detect the atomic reflected signal extracted by the splitting device, the quantity representative of the population of cold atoms (N) being obtained from a detected value of the atomic reflected signal and from a detected value of a signal reflected by the environment in the absence of the cloud, called reference reflected signal.
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Patent Agency Ranking
公开(公告)号：US11326884B2
公开(公告)日：2022-05-10
申请号：US16789404
申请日：2020-02-12
Applicant: California Institute of Technology
Inventor： Kerry Vahala , Jiang Li , Yu-Hung Lai , Myoung-Gyun Suh , Seung Hoon Lee
Abstract: A disk resonator is pumped by counterpropagating pump signals to produce corresponding counterpropagating Brillouin laser signals. The pump laser optical frequencies are separated by a frequency offset ΔνP but excite the same nominal resonator optical mode; the Brillouin laser optical frequencies are separated by a beat frequency ΔνL with 0
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公开(公告)号：US10812197B1
公开(公告)日：2020-10-20
申请号：US16533899
申请日：2019-08-07
Applicant: The University of Massachusetts
Inventor： Yifei Li
IPC: H04B10/548 , G01C19/64
Abstract: A modified Sagnac loop phase-modulated microwave photonic link with a pulsed optical source is disclosed. Unlike a conventional Sagnac loop, the optical phase offset of the loop can be adjusted to quadrature by applying a synchronized modulation signal to an in-loop phase shifting phase modulator. Thereby, it exemplifies the fundamental RF response.
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公开(公告)号：US10375813B2
公开(公告)日：2019-08-06
申请号：US15778605
申请日：2016-11-24
Applicant: THALES
Inventor： Matthieu Dupont-Nivet , Sylvain Schwartz
Abstract: Ultra-cold atom sensor for measuring a rotational velocity along a measurement axis comprises: means designed to generate a first and a second ultra-cold atom trap, one trap making it possible to immobilize a cloud of ultra-cold atoms in an internal state different from the other trap, at a predetermined distance from the measurement plane, the means comprising, at least one first and one second waveguide that are designed to propagate microwaves with angular frequencies ωa and ωb, the waveguides being non-secant and positioned symmetrically about an axis called the axis of symmetry, conductive wires integrated into the chip and designed to be flowed through by DC currents, the means being configured to modify the energy of the ultra-cold atoms in such a way as to create a potential minimum for the ultra-cold atoms in the internal state |a> and a potential minimum for the ultra-cold atoms in the internal state |b>, thus forming the first and second ultra-cold atom traps, and to move the traps along a closed path, traveled in one direction by the ultra-cold atoms of the first trap and in the opposite direction by the ultra-cold atoms of the second trap.
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公开(公告)号：US20180066942A1
公开(公告)日：2018-03-08
申请号：US15418990
申请日：2017-01-30
Applicant: Honeywell International Inc.
Inventor： Robert Compton
IPC: G01C19/64
Abstract: A fully reciprocal atomic interferometric gyroscope is provided. The fully reciprocal atomic interferometric gyroscope includes an atomic chamber, a plurality of lasers, a controller and measurement sensor. The atomic chamber is used to hold an atom cloud. The plurality of lasers are selectively positioned to selectively direct laser beams into the atomic chamber. The controller is configured to control the plurality lasers to initially cool the atom cloud to a point where at least one optical lattice can be formed that is used to move wave function halves of atoms of the atom cloud along split wave function paths that form an interferometer cycle. The measurement sensor is configured to conduct a phase readout of a wave function upon the completion of at least one interferometer cycle around the split wave function paths.
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公开(公告)号：US20170315054A1
公开(公告)日：2017-11-02
申请号：US15582178
申请日：2017-04-28
Applicant: UT-Battelle, LLC
Inventor： Joseph M. Lukens , Nicholas A. Peters , Raphael C. Pooser
CPC classification number: G01N21/45 , G01B9/02003 , G01B9/02007 , G01B2290/55 , G01C19/64 , G01J3/26
Abstract: Nonlinear interferometers include a nonlinear optical medium that is situated to produce a conjugate optical beam in response to a pump beam and a probe beam. The pump, probe, and conjugate beams propagate displaced from each other along a common optical path. One of the beams is selectively phase shifted, and the beams are then returned to the nonlinear medium, with the selectively phase shift beam phase shifted again. The nonlinear medium provides phase sensitive gain to at least one of the probe or conjugate beams, and the amplified beam is detected to provide an estimate of the phase shift.
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