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公开(公告)号：US20180356441A1
公开(公告)日：2018-12-13
申请号：US15778607
申请日：2016-11-07
Applicant: THALES
Inventor： Matthieu DUPONT-NIVET , Sylvain SCHWARTZ , Arnaud BRIGNON , Jérôme BOURDERIONNET
IPC: G01P15/093 , G01C19/58 , H01S5/0687 , H01S5/40 , H01S5/50 , H01S5/026 , H01S5/068 , H01S5/02 , H01S5/12
CPC classification number: G01P15/093 , G01C19/58 , G01P15/08 , H01S3/0085 , H01S3/10084 , H01S3/1303 , H01S3/1307 , H01S5/021 , H01S5/026 , H01S5/06821 , H01S5/0687 , H01S5/12 , H01S5/4025 , H01S5/50
Abstract: A laser-source assembly that is configured to illuminate a vacuum chamber containing atoms in the gaseous state so as to implement a cold-atom inertial sensor, the atoms having at least two fundamental levels that are separated by a fundamental frequency difference comprised between 1 and a few gigahertz, the assembly comprises: a master laser that emits a beam having a master frequency; a first control loop that is configured to stabilize the master frequency of the master laser on a frequency corresponding to half a set frequency of an atomic transition between a fundamental level and an excited level of the atoms; a slave laser that has a slave frequency; and a second control loop that is configured to stabilize the slave frequency of the slave laser with respect to the master frequency, the slave frequency being offset with respect to the master frequency successively, over time, by a first preset offset value, a second preset offset value, and a third preset offset value, the offset values being comprised in an interval equal to half the fundamental frequency difference plus or minus a few hundred MHz.
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公开(公告)号：US20230178262A1
公开(公告)日：2023-06-08
申请号：US17924340
申请日：2021-05-07
Applicant: THALES
Inventor： Matthieu DUPONT-NIVET , Benjamin WIRTSCHAFTER
Abstract: An atom chip for an ultracold-atom sensor, the chip includes an XY-plane normal to a Z-axis, the atom chip comprising: first and second coplanar waveguides suitable for propagating microwaves at respective angular frequencies ωa and ωb, the waveguides being placed symmetrically on either side of the X-axis and being referred to as X-wise guides, first and second coplanar waveguides suitable for propagating microwaves at respective angular frequencies ω′a and ω′b, the waveguides being placed symmetrically on either side of an axis the projection of which in the XY-plane is along an axis Y′ that is different from the X-axis and that is contained in the XY-plane, and being referred to as Y′-wise guides, the X-wise guides being electrically insulated from the Y′-wise guides, an intersection of the guides forming a parallelogram of center O defining an origin of the reference frame XYZ, at least a first conductive wire and a second conductive wire the respective projections of which in the XY-plane are secant at O and make between them an angle larger than or equal to 20°, the conductive wires being suitable for being passed through by DC currents.
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公开(公告)号：US20250044092A1
公开(公告)日：2025-02-06
申请号：US18792323
申请日：2024-08-01
Applicant: THALES
Inventor： Benjamin WIRTSCHAFTER , Matthieu DUPONT-NIVET , Soizic HELLO
IPC: G01C19/64
Abstract: An interferometric inertial ultracold-atom sensor of gyrometer type, including an atom chip comprising at least one set of a first and second elementary sensor, a power-supplying device, the magnetic-field generator and the power-supplying device being configured to apply the magnetic field, the DC currents and the microwave signals in a predetermined sequence, the arrangement of the group of one or more conductive elements of each sensor and the sequence further being configured so that the path associated with the first elementary sensor and the path associated with the second elementary sensor are identical and traced simultaneously and in inverse directions by the clouds of ultracold atoms associated with a given internal state, the sensor further comprising a detecting system.
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公开(公告)号：US20180352642A1
公开(公告)日：2018-12-06
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：US20240426865A1
公开(公告)日：2024-12-26
申请号：US18662884
申请日：2024-05-13
Applicant: THALES
Inventor： Matthieu DUPONT-NIVET , Benjamin WIRTSCHAFTER , Soizic HELLO
Abstract: An ultracold-atom sensor includes an atom chip (ACh) comprising a first and a second waveguide (CPWX1, CPWX2) that are suitable for propagating microwave waves and DC currents, at least a first conductive wire and a second conductive wire (WId, WId1) the respective projections of which are secant at a point defining a first crossing point (C1), an atom generation device (ACG), a power supply device (PSD) comprising at least one microwave generator (GMW) and at least one DC current generator (GDC), the power supply device being configured to apply, to the first and second waveguides and to spatially separate the two traps, the microwave signals in order to initiate the spatial separation, and then the CMW electric currents instead of the microwave signals in order to maintain the spatial separation.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20220397397A1
公开(公告)日：2022-12-15
申请号：US17832616
申请日：2022-06-04
Applicant: THALES
Inventor： Benjamin WIRTSCHAFTER , Matthieu DUPONT-NIVET
Abstract: An atom chip (Ach) for an ultra-cold atom sensor, the atom chip includes a first pair of waveguides, a second pair of waveguides, the projections of the guides along X and the guides along Y′ in the plane XY forming, at their intersection, a first parallelogram with a centre O and having a first surface, a first conductive strip and a second conductive strip arranged such that their respective projection in the plane XY forms, at their intersection, a second parallelogram also with a centre O and having a second surface, the strips being designed to be flowed through by DC currents, an intersection between the first and the second surface being greater than or equal to 40% of the first surface.
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7.发明申请公开(公告)号：US20250076056A1
公开(公告)日：2025-03-06
申请号：US18951063
申请日：2024-11-18
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：US20250044091A1
公开(公告)日：2025-02-06
申请号：US18792315
申请日：2024-08-01
Applicant: THALES
Inventor： Benjamin WIRTSCHAFTER , Matthieu DUPONT-NIVET , Soizic HELLO
IPC: G01C19/64
Abstract: An accelerometer-type interferometric ultracold atom inertial sensor including an atom chip including at least one set of a first and a second elementary sensor; an atom generation device; a generator for generating a uniform magnetic field; a power supply device; with the arrangement of the group of one or more conductive elements of each sensor and the sequence being further configured so that the trajectories associated with the first elementary sensor and the trajectories associated with the second elementary sensor are parallel to each other, are of the same length, are covered simultaneously and so that the departure direction of the first clouds, from the first and the second elementary sensor respectively, are opposite; the sensor further comprising a detection system.
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9.发明申请公开(公告)号：US20220397396A1
公开(公告)日：2022-12-15
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：US20210232101A1
公开(公告)日：2021-07-29
申请号：US17250135
申请日：2019-06-04
Applicant: THALES
Inventor： Matthieu DUPONT-NIVET
Abstract: A cooling system for a cold-atom sensor, this system includes a two-dimensional cooling chamber, called the 2D chamber (Ch2D), kept under ultra-high vacuum and placed at least partially inside an integrating cylinder (IC) having a Z-axis, the integrating cylinder being configured to illuminate the 2D chamber with a first isotropic light (IL1), the 2D chamber comprising atoms to be cooled, a three-dimensional cooling chamber, called the 3D chamber (Ch3D), kept under ultra-high vacuum and joined to the 2D chamber by an aperture (Op) configured to allow the atoms to pass from the 2D chamber to the 3D chamber via movement substantially along the Z-axis, the 3D chamber being placed at least partially inside an integrating sphere (IS), the integrating sphere being configured to illuminate the 3D chamber with a second isotropic light (IL2).
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