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Pyramid structural type atom interference gravitational acceleration measurement device based on two-dimensional crossed grating

A technology of pyramid structure and gravitational acceleration, applied in the field of atom interferometer, can solve the problems of a large number of optical devices, increase in system volume, etc., to achieve the effect of reducing the volume, simple system structure, and reducing the overall cost

Active Publication Date: 2018-06-19
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

The six laser beams of the magneto-optical trap need to install six beam expanders on the vacuum cavity, and a large number of optical devices are required in the optical path, which inevitably increases the volume of the system

Method used

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  • Pyramid structural type atom interference gravitational acceleration measurement device based on two-dimensional crossed grating
  • Pyramid structural type atom interference gravitational acceleration measurement device based on two-dimensional crossed grating
  • Pyramid structural type atom interference gravitational acceleration measurement device based on two-dimensional crossed grating

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] like figure 1 , figure 2 and image 3 As shown, the pyramid-like atomic interference gravimetric measurement device based on the two-dimensional cross grating of the present invention uses the two-dimensional cross grating 3 for beam splitting to form a pyramid-like magneto-optical trap design. Specifically, the entire vacuum system only needs one beam of light from top to bottom, which is divided into five beams of light with the same characteristics through the two-dimensional cross grating 3, and is formed by four mirrors in the horizontal direction and the bottom mirror. Three pairs of orthogonal confinement light and pump light form a magneto-optical trap to realize the cooling and confinement of atomic groups, replacing the traditional six-beam light scheme.

[0028] The device of the present invention specifically in...

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Abstract

The invention discloses a pyramid structural type atom interference gravitational acceleration measurement device based on a two-dimensional crossed grating. The device comprises a vacuum chamber, a beam expansion cylinder, the two-dimensional crossed grating and a reflector assembly used for generating a separate pyramid structure, wherein the beam expansion cylinder is used for leading single fibers of the vacuum system in, the two-dimensional crossed grating is arranged between the beam expansion cylinder and the reflector assembly, the reflector assembly sequentially comprises an MOT region, an interference region and a detection region from up to down, the MOT region comprises four first reflectors, and a lower portion of the detection region is provided with a second reflector. The device has advantages of small entire size, strong robustness, low cost and high measurement precision.

Description

technical field [0001] The invention mainly relates to the field of atomic interferometers, in particular to a pyramid-like structure atomic interference gravitational acceleration measurement device based on a two-dimensional cross grating. Background technique [0002] Since the invention of the Michelson interferometer, interferometric instruments constructed based on the diffraction and interference characteristics of light waves have been widely used in basic scientific research, production practice, aerospace, geological prospecting, and national defense industries due to their extremely high measurement accuracy and sensitivity. field. In practice, people gradually realized that the use of shorter wavelength waves for interference can improve measurement accuracy, so an electronic interferometer was built in 1952, and a neutron interferometer was built in 1962. It was not until the 1970s that people began to conceive Atom interferometer. An atomic interferometer is ...

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Application Information

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IPC IPC(8): G01V7/14
CPCG01V7/14
Inventor 颜树华魏春华杨俊贾爱爱罗玉昆胡青青李期学朱凌晓王恩龙张旭
Owner NAT UNIV OF DEFENSE TECH
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