Atomic ground state hyperfine Zeeman frequency measuring device and method

An ultra-fine and atomic technology, applied in the field of measurement devices for the ultra-fine Zeeman frequency of the atomic ground state, can solve problems such as weak atomic absorption spectral lines, small number density of Rb particles, and ultra-fine Zeeman frequency errors in the ground state of rubidium atoms. Effect of increasing particle difference, improving accuracy and reducing error

Active Publication Date: 2015-03-18
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] due to gaseous 87 The number density of Rb particles is small, and the particle number difference between the two hyperfine energy levels obtained by using the existing measurement method at room temperature is very small, so the obtained atomic absorption line is very weak. According to the measurement of the absorption line There is a certain error in the hyperfine Zeeman frequency of the ground state of the rubidium atom

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  • Atomic ground state hyperfine Zeeman frequency measuring device and method
  • Atomic ground state hyperfine Zeeman frequency measuring device and method
  • Atomic ground state hyperfine Zeeman frequency measuring device and method

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Embodiment 1

[0042] see figure 1 , Embodiment 1 of the present invention provides a measurement device for atomic ground state hyperfine Zeeman frequency, the device includes: optical radiation module 101 , filtering module 102 , splitting and transition module 103 , optical detection module 104 and main control calculation module 105 .

[0043] The light radiation module 101 is used to make atoms generate radiation light, and the spectral lines of the radiation light include two hyperfine structure components.

[0044] The filtering module 102 is configured to filter out one of the two hyperfine structure components by using atomic isotopes to obtain filtered radiation.

[0045] The splitting and transition module 103 is configured to split atoms in the microwave cavity and generate resonance transitions under the irradiation of the filtered radiant light and through the action of a magnetic field and a radio frequency signal.

[0046] Wherein, the atoms in the microwave cavity and the a...

Embodiment 2

[0053] see figure 2 , Embodiment 2 of the present invention takes 87 Taking Rb atom as an example, a device for measuring the hyperfine Zeeman frequency of the atomic ground state is provided. Wherein, the split and transition module 203 is respectively connected with the optical detection module 204 and the main control calculation module 205 .

[0054] The light radiation module 201 is used to make atoms generate radiated light, and the spectral lines of the radiated light include two hyperfine structure components.

[0055] Among them, the two hyperfine structure components are respectively, the hyperfine structure component of the transition line between the excited state of the rubidium atom and the higher hyperfine structure energy level in the ground state, and the higher hyperfine structure component of the excited state and the ground state of the rubidium atom. Hyperfine structure composition of the transition lines between low hyperfine structure energy levels. In...

Embodiment 3

[0076] Embodiment 3 of the present invention provides a method for measuring the hyperfine Zeeman frequency of an atomic ground state, which specifically includes:

[0077] 301: Make atoms generate radiant light, and the spectral lines of the radiant light include two hyperfine structure components.

[0078] 302: Filter out one of the two hyperfine structure components by using the isotope of the atom to obtain filtered radiant light.

[0079] 303: Under the irradiation of the filtered radiant light, the atoms in the microwave cavity are split and resonant transitions are generated through the action of the magnetic field and the radio frequency signal.

[0080] Wherein, the atoms in the microwave cavity and the atoms generating the radiated light are the same kind of atoms.

[0081] 304: used for real-time detection of the intensity of the radiated light passing through the microwave cavity, and generating a light intensity signal.

[0082] 305: Obtain the absorption line o...

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Abstract

The invention discloses an atomic ground state hyperfine Zeeman frequency measuring device and method, belonging to the field of atomic frequency standard. The atomic ground state hyperfine Zeeman frequency measuring device comprises an optical radiation module, a filtering module, a fission transition module, an optical detection module and a main control computation module, wherein the optical radiation module is used for enabling an atom generate radiation light; the spectral line of the radiation light comprises two hyperfine structural components; the filtering module is used for filtering out one of the two hyperfine structural components by using an isotope of the atom so as to obtain the filtered radiation light; the fission transition module is used for performing fission and resonance transition on the atom in a microwave cavity under the action of the magnetic field and a radio frequency signal and under the radiation of filtered radiation light; the atom in the microwave cavity is the same as the atom in the optical radiation module; the optical detection module is used for detecting the intensity of the radiation light penetrating through the fission transition module in real time and generating a light intensity signal; the main control computation module is used for supplying the radio frequency signal to the microwave cavity, obtaining an absorption spectral line of the atom according to a corresponding relationship between the radio frequency signal and the light intensity signal and computing the atomic ground state hyperfine Zeeman frequency according to the absorption spectral line.

Description

technical field [0001] The invention relates to the field of atomic frequency standards, in particular to a device and method for measuring ultrafine Zeeman frequency of atomic ground state. Background technique [0002] The Zeeman effect is a phenomenon in which the energy levels of atoms split under the action of an external magnetic field. After the Zeeman effect occurs in the atom, the transition frequency between the hyperfine energy levels of the ground state is called the hyperfine Zeeman frequency of the atomic ground state. [0003] With the wide application of rubidium atomic frequency standards, it is usually necessary to measure the hyperfine Zeeman frequency of the ground state of rubidium atoms as a reference frequency value for quantum frequency discrimination of atomic clocks. Existing methods for measuring the hyperfine Zeeman frequency of the ground state of rubidium atoms include: 87 The glass bubble of Rb is placed in a microwave resonant cavity with a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/02
Inventor 雷海东
Owner JIANGHAN UNIVERSITY
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