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1. 发明申请

US20230120920A1 Tri-Axial Magnetic Field Correction Coil, Physical Package, Physical Package for Optical Lattice Clock, Physical Package for Atomic Clock, Physical Package for Atom Interferometer, Physical Package for Quantum Information Processing Device, and Physical Package System 有权
公开(公告)号：US20230120920A1
公开(公告)日：2023-04-20
申请号：US17915745
申请日：2021-03-30
申请人： JEOL Ltd. , RIKEN
发明人： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
IPC分类号： H01F7/20 , H03L7/26 , G04F5/14
摘要： A tri-axial magnetic field correction coil includes a first coil group and a second coil group with respect to an X-axis direction that passes through a clock transition space in which atoms are disposed. The first coil group is a Helmholtz-type coil composed in a point-symmetrical shape around the clock transition space. The second coil group is composed in a point-symmetrical shape around the clock transition space with respect to the X-axis direction, and is a non-Helmholtz-type coil that differs from the first coil group in terms of coil size, coil shape, or distance between coils.

2. 发明申请

US20230134841A1 Triaxial Magnetic Field Correction Coil, Physics Package, Physics Package for Optical Lattice Clock, Physics Package for Atomic Clock, Physics Package for Atom Interferometer, Physics Package for Quantum Information Processing Device, and Physics Package System 有权
公开(公告)号：US20230134841A1
公开(公告)日：2023-05-04
申请号：US17915720
申请日：2021-03-30
申请人： JEOL Ltd. , RIKEN
发明人： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
IPC分类号： H03L7/26 , G04F5/14 , H01F7/20
摘要： There is a need to maintain or enhance the magnetic field correction accuracy of a physics package while making the physics package more compact and portable. A triaxial magnetic field correction coil provided inside a vacuum chamber surrounding a clock transition space having atoms disposed therein. The triaxial magnetic field correction coil formed into a shape such that it is possible to correct, for magnetic field components of three axial directions passing through the clock transition space, a constant term, a first order spatial derivative term, a second order spatial derivative term, a third or higher order spatial derivative term, or some given combination of these terms. The triaxial magnetic field correction coil can be used in, for example, a physics package for an optical lattice clock.

3. 发明授权

US11493887B2 Radiation shield and optical lattice clock including radiation shield 有权
公开(公告)号：US11493887B2
公开(公告)日：2022-11-08
申请号：US16251619
申请日：2019-01-18
申请人： RIKEN
发明人： Hidetoshi Katori , Masao Takamoto , Ichiro Ushijima , Takehiro Tawara , Hideo Yokota
IPC分类号： G04F5/14 , G02B5/20 , H03L7/26
摘要： Provided according to an embodiment of the present disclosure is a radiation shield 10 including a shield wall surrounding a hollow region capable of accommodating therein atoms for an optical lattice clock 100, the shield wall having, provided therein, at least two apertures communicating with outside. A geometrical shape of an inner wall surface of the shield wall is configured such that a difference between BBR shifts found under two conditions does not exceed a predetermined value over a range of position of atoms, the BBR shifts being caused in atoms 2 by emitted radiation emitted by the inner wall surface, incoming radiation leaking in from the outside through the apertures, and a reflection component of the emitted radiation and incoming radiation at the inner wall surface, the two conditions being a condition where the inner wall surface exhibits mirror reflection and a condition where the inner wall surface exhibits diffuse reflection, the range being where clock transition operation is carried out in the optical lattice clock, the inner wall surface facing the hollow region. Provided according to other embodiments of the present disclosure also are the optical lattice clock 100 including such a radiation shield, and a design method for the radiation shield.

4. 发明授权

US09553597B2 Optical lattice clock, clock device and laser light source 有权
标题翻译：光栅时钟，时钟器件和激光光源
公开(公告)号：US09553597B2
公开(公告)日：2017-01-24
申请号：US14422177
申请日：2013-08-12
申请人： RIKEN
发明人： Hidetoshi Katori
IPC分类号： H03L7/26 , G04F5/14 , H01S3/067
CPC分类号： H03L7/26 , G04F5/14 , H01S3/06791
摘要： Various embodiments improve accuracy by increasing the number of atoms engaged in a clock transitions in an optical lattice clock. An exemplary optical lattice clock an embodiment comprises an optical waveguide, an optical path, a laser light source, and a laser cooler. The optical path has a hollow pathway that extends from a first end to a second end while being surrounded with a tubular wall, which is used as a waveguide path. The optical path passes between mirrors and through the pathway. The laser light source supplies to the optical path a pair of lattice lasers (L1 and L2) propagating in opposite directions with each other. The laser cooler supplies cooled atoms that have two levels of electronic states associated with a clock transition to the vicinity of the first end of the optical waveguide.
摘要翻译：各种实施例通过增加在光栅格时钟中的时钟转换中引入的原子的数量来提高精度。示例性光学晶格时钟实施例包括光波导，光路，激光光源和激光冷却器。光路具有从第一端延伸到第二端的中空路径，同时被用作波导路径的管状壁围绕。光路通过反射镜和通过通路。激光源向光路提供一对彼此相反方向传播的格子激光器（L1和L2）。激光冷却器提供具有与时钟转变相关联的两级电子状态的冷却原子到光波导的第一端附近。

5. 发明授权

US10452029B2 Optical lattice clock at operational magic frequency and method for operating the same 有权
公开(公告)号：US10452029B2
公开(公告)日：2019-10-22
申请号：US15547481
申请日：2016-01-28
申请人： RIKEN
发明人： Hidetoshi Katori
IPC分类号： G04F5/14 , H03L7/26
摘要： An embodiment of an optical lattice clock comprising atoms and a laser light source at an operational magic frequency is provided. The atoms are capable of making a clock transition between two levels of electronic states, and the laser light source generates at least a pair of counterpropagating laser beams, each of which having a lattice-laser intensity I. The pair of counterpropagating laser beams forms an optical lattice potential for trapping the atoms at around antinodes of a standing wave created by it. The operational magic frequency is one of the frequencies that have an effect of making lattice-induced clock shift of the clock transition insensitive to variation ΔI of the lattice-laser intensity I, the lattice-induced clock shift being a shift in a frequency for the clock transition of the atoms caused by the variation ΔI of the lattice-laser intensity I.

6. 发明申请

US20150194972A1 OPTICAL LATTICE CLOCK, CLOCK DEVICE AND LASER LIGHT SOURCE 有权
标题翻译：光学时钟，时钟设备和激光光源
公开(公告)号：US20150194972A1
公开(公告)日：2015-07-09
申请号：US14422177
申请日：2013-08-12
申请人： RIKEN
发明人： Hidetoshi Katori
IPC分类号： H03L7/26 , H01S3/067 , G04F5/14
CPC分类号： H03L7/26 , G04F5/14 , H01S3/06791
摘要： Various embodiments improve accuracy by increasing the number of atoms engaged in a clock transitions in an optical lattice clock. An exemplary optical lattice clock an embodiment comprises an optical waveguide, an optical path, a laser light source, and a laser cooler. The optical path has a hollow pathway that extends from a first end to a second end while being surrounded with a tubular wall, which is used as a waveguide path. The optical path passes between mirrors and through the pathway. The laser light source supplies to the optical path a pair of lattice lasers (L1 and L2) propagating in opposite directions with each other. The laser cooler supplies cooled atoms that have two levels of electronic states associated with a clock transition to the vicinity of the first end of the optical waveguide.
摘要翻译：各种实施例通过增加在光栅格时钟中的时钟转换中引入的原子的数量来提高精度。示例性光学晶格时钟实施例包括光波导，光路，激光光源和激光冷却器。光路具有从第一端延伸到第二端的中空路径，同时被用作波导路径的管状壁围绕。光路通过反射镜和通过通路。激光源向光路提供一对彼此相反方向传播的格子激光器（L1和L2）。激光冷却器提供具有与时钟转变相关联的两级电子状态的冷却原子到光波导的第一端附近。

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