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Diffuse reflection laser cooling cold atom dispersion detection device and method

A technology of laser cooling and cold atoms, which is applied in the direction of instruments, can solve the problems of low utilization rate of cold atoms, and achieve the effect of low utilization rate of cold atoms, simple device structure, and low cost of materials and processing

Inactive Publication Date: 2021-11-30
PKU HKUST SHENZHEN HONGKONG INSTITUTION
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for diffuse reflection laser cooling cold atom diffusion detection, to solve the problem of low utilization of existing cold atoms

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  • Diffuse reflection laser cooling cold atom dispersion detection device and method
  • Diffuse reflection laser cooling cold atom dispersion detection device and method
  • Diffuse reflection laser cooling cold atom dispersion detection device and method

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Embodiment 1

[0028] see Figure 1-3 As shown, the present invention is a device for diffuse reflection laser cooling cold atom dispersion detection, including cold atomic cluster 1, injection fiber 3 and cylindrical cavity 5, cylindrical cavity 5 is a cavity structure, and cold atomic cluster 1 is arranged on a cylindrical cavity Inside the cylindrical cavity 5, the cold atomic group 1 is used as the detection medium, the overall shape is approximately spherical, the density in the central area is the largest, and the density in the edge area is gradually thinner. The injection optical fiber 3 is placed on the side of the cylindrical cavity 5, and the injection optical fiber 3 is used as diffuse detection light. The injection carrier of 2 has a certain numerical aperture, so that the diffuse probe light 2 output by it must have a certain angle, which is the realization condition for the diffuse distribution of the probe light. The position of 3 is adapted to the position of the first openi...

Embodiment 2

[0036] In the present invention, the diffuse reflection laser cooling cold atom dispersion detection device is as figure 1As shown, the cold atomic group 1 is used as the detection medium, the overall shape is approximately spherical, the density in the central region is the largest, and the density in the edge region is gradually thinner; the diffuse detection light 2 is used as the detection method, which is mainly formed by the injection fiber 3 output to the free space at a certain divergence angle The injection fiber 3, as the injection carrier of the diffuse probe light 2, has a certain numerical aperture, so the diffuse probe light 2 output by it must have a certain angle, which is the realization condition for the diffuse distribution of the probe light; the diffuse reflection coating 4 is located in the cylindrical cavity The inner surface of the body 5 generally has a diffuse reflectance of more than 97%, and the probe light injected at a certain angle can form an iso...

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Abstract

The invention discloses a diffuse reflection laser cooling cold atom dispersion detection device and method, and relates to the technical field of laser cooling. The device comprises a cold atomic group, an injection optical fiber and a cylindrical cavity, the cylindrical cavity is a cavity structure, the cold atomic group is arranged in the cylindrical cavity, the injection optical fiber is placed on one side of the cylindrical cavity, a first opening is formed in one side of the cylindrical cavity, and the position of the injection optical fiber is matched with the position of the first opening; and one end of the injection optical fiber emits a plurality of dispersion detection light. The diffusion absorption detection technology is utilized, the interaction area of the cold atoms and the detection light is effectively increased, the number of the cold atoms which can be detected is increased, the purpose of improving the utilization rate of the cold atoms is achieved, the interaction area of the cold atoms and the detection light can be increased, and the problems of low cold atom utilization rate and the like in the prior art are solved; and the device is simple in structure, easy to implement and low in material and processing cost.

Description

technical field [0001] The invention belongs to the technical field of laser cooling, and in particular relates to a diffuse reflection laser cooling cold atom dispersion detection device and method. Background technique [0002] Laser cooling is a major progress in physics in recent years. As an important technical means, its significance lies in two aspects. On the one hand, it can overcome the Doppler effect and reduce the influence of physical factors related to atomic velocity on the measurement of precise physical constants. The most typical is to use cold atoms to achieve precise measurement of frequency, and based on this, to achieve more precise and accurate measurements of length, Rydberg constant, fine structure constant and Josephson constant; on the other hand, laser cooling can also It has promoted the development of some new disciplines and technologies, such as cold atom frequency standard, cold atom gravimeter, cold atom gyroscope, optical tweezers, etc. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 王秀梅陈景标何进王亮刘亚轩高连山李春来胡国庆
Owner PKU HKUST SHENZHEN HONGKONG INSTITUTION
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