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Coherent population trapping cold atomic clock based on grating chip and application method thereof

A technology of coherent population imprisoning and cold atoms, applied to instruments using atomic clocks, diffraction gratings, optics, etc., can solve problems such as unsuitable transportation, complex optical path structure, and large volume of cold CPT atomic clocks, and achieve good accuracy and good time frequency Effect

Pending Publication Date: 2022-03-01
NAT INST OF METROLOGY CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the cold CPT atomic clock has the advantages of high frequency stability and accuracy, the overall device of the cold CPT atomic clock is large in size, the optical path structure is complex, it is not suitable for transportation, and it is difficult to realize miniaturization

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  • Coherent population trapping cold atomic clock based on grating chip and application method thereof
  • Coherent population trapping cold atomic clock based on grating chip and application method thereof

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...

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Abstract

The invention provides a coherent population trapping cold atomic clock based on a grating chip and an application method thereof, relates to the technical field of atomic clocks, and aims to optimize the structure of the cold atomic clock to a certain extent and reduce the size of the whole device. The invention provides a coherent population trapping cold atomic clock based on a grating chip. The coherent population trapping cold atomic clock comprises a grating magneto-optical trap, a detection system, a magnetic shielding system and an atomic source, the magnetic shielding system comprises a first magnetic shielding mechanism and a second magnetic shielding mechanism arranged in the first magnetic shielding mechanism; the grating magneto-optical trap comprises a vacuum cavity located in the second magnetic shielding mechanism, a grating chip arranged at the bottom in the vacuum cavity, a pair of reverse Helmholtz coils arranged on the upper side and the lower side of the vacuum cavity and an incident light assembly located on the upper side of the second magnetic shielding mechanism, and one end of the atomic source is connected into the vacuum cavity; the detection system comprises a detection light assembly and a reflection assembly which are oppositely arranged on the two sides of the second magnetic shielding mechanism, and a pair of Helmholtz coils which are oppositely arranged on the two sides of the vacuum cavity.

Description

technical field [0001] The invention relates to the technical field of atomic clock equipment, in particular to a grating chip-based coherent population trapped cold atomic clock and an application method thereof. Background technique [0002] Coherent Population Trapping (CPT) is a quantum interference phenomenon produced by the interaction between atoms and coherent light. The coherent population trapping state can be prepared in the atomic system to realize a new chip CPT atomic clock. Its advantages are One is that there is no need for a microwave cavity, which can significantly reduce the volume. The CPT atomic clock has been greatly developed since it was proposed and has shown its superior performance. [0003] Laser cooling technology can cool hot atoms to close to absolute zero, reduce the motion speed of atoms to about several meters per second, and make the energy level structure more stable, which can greatly improve the accuracy of measurement and then improve t...

Claims

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Application Information

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IPC IPC(8): G04F5/14G02B5/18H01F5/00
CPCG04F5/145G02B5/1814H01F5/00Y02E30/10
Inventor 刘小赤段俊毅于治龙
Owner NAT INST OF METROLOGY CHINA
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