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Glass alkali metal gas chamber internal alkali metal vapor atom density measuring device and method

A technology of alkali metal gas chamber and atomic density, applied in the direction of measuring device, specific gravity measurement, instrument, etc., to achieve high accuracy

Inactive Publication Date: 2020-11-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventor understands that for the measurement of the atomic density of the alkali metal vapor in the alkali metal gas chamber, the existing devices all have certain limitations

Method used

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  • Glass alkali metal gas chamber internal alkali metal vapor atom density measuring device and method
  • Glass alkali metal gas chamber internal alkali metal vapor atom density measuring device and method
  • Glass alkali metal gas chamber internal alkali metal vapor atom density measuring device and method

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Embodiment Construction

[0019] Below in conjunction with the attached drawings ( figure 1 ) Describe the present invention.

[0020] figure 1 It is a schematic diagram of the structure of a device for measuring the atomic density of alkali metal vapor inside a glass alkali metal gas cell of the present invention. reference figure 1 As shown, a device for measuring the atomic density of alkali metal vapor in a glass alkali metal gas cell includes a polarizer 4 and a measurement sensitive unit module, and a Faraday modulator is arranged between the polarizer 4 and the measurement sensitive unit module 6. The polarizer 4 is a polarization Glan prism, the polarization Glan prism is connected to a light intensity stabilization system 5, and the light intensity stabilization system 5 is connected to the measurement sensitive unit module through the Faraday modulator 6, and the measurement The sensitive unit module includes a glass alkali metal gas chamber 9, the glass alkali metal gas chamber 9 is located...

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Abstract

The invention discloses a glass alkali metal gas chamber internal alkali metal vapor atom density measuring device and method. A Faraday modulator is arranged between a polarizer and a measurement sensitive unit module; linearly polarized light from the polarizer can generate a Faraday rotation angle of a polarization plane of the linearly polarized light in the Faraday modulator due to a Faradayeffect; a Faraday deflection angle of a polarization plane is generated through the measurement sensitive unit module, and the Faraday deflection angle is demodulated through the combination of a photoelectric detector and a lock-in amplifier; the atomic density of the alkali metal vapor in the measurement sensitive unit module is calculated by utilizing a relational expression between a Faraday deflection angle and the atomic density of the alkali metal vapor, and the method can be used for evaluating the atomic density of the alkali metal vapor in an atom sensing device. In particular, the present invention has higher accuracy in measuring high density alkali metal vapors.

Description

Technical field [0001] The present invention relates to an alkali metal vapor atomic density measurement technology, in particular to an alkali metal vapor atomic density measurement device and method in a glass alkali metal gas chamber. A Faraday modulator is installed between a polarizer and a measurement sensitive unit module to enable The linearly polarized light from the polarizer generates the Faraday rotation angle of its polarization plane due to the Faraday effect in the Faraday modulator, and then generates the Faraday deflection angle of its polarization plane after passing through the measurement sensitive unit module and passes through the photoelectric The combination of the detector and the lock-in amplifier demodulates the Faraday deflection angle, and uses the relationship between the Faraday deflection angle and the alkali metal vapor atom density to calculate the alkali metal vapor atom density in the measurement sensitive unit module, which can be used for Ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24
CPCG01N9/24
Inventor 周斌权尚慧宁房建成韩邦成池浩湉
Owner BEIHANG UNIV
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