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Integrating sphere magnetism-insensitive imprisoning system

An integrating sphere and insensitive technology, which is applied in the field of magnetic trap system, can solve the problems that affect the precision and accuracy of atomic clock measurement, cannot eliminate Doppler frequency shift, and the number of atoms is small, so as to facilitate precise tuning and prolong the coherence time , small size effect

Active Publication Date: 2014-04-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

So far, research on integrating sphere cold atomic physics and precision measurement has focused more on laser cooling under diffuse reflection light field. This technology cannot eliminate Doppler frequency shift, the coherence time between atoms is shorter, and the number of atoms is smaller. , thus affecting the precision and accuracy of atomic clock measurements

Method used

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Embodiment

[0028] The aperture of the glass sphere 1 is about Φ45mm, and a Φ10mm aperture C is opened at the lower end of the sphere. It is fired on a commercial glass absorption cell 3. The opening C should not be too large, otherwise it will destroy the spatial uniformity of the light field in the sphere; diffuse reflection coating 2 is a barium sulfate material, evenly coated on the outer wall of the glass sphere 1, the diffuse reflectance in the 450nm to 800nm ​​band is as high as 96%, and four Φ2mm light holes a, b, c, d are opened on the coating; commercial The glass absorption cell 3 is realized by sealing the quartz glass and the stainless steel transition flange D.

[0029] Two quasi-Helmholtz coils provide a uniform bias magnetic field, so that the magnetic field at the center of the sphere is non-zero, so as to avoid the severe loss of atoms due to the Majorana transition near the zero point of the magnetic field, and realize the trapping of atoms in the Z direction. To obtain...

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Abstract

An integrating sphere magnetism-insensitive imprisoning system mainly comprises a vacuum cavity, a magnetic field system and an optical path system. The integrating sphere magnetism-insensitive imprisoning system is used for manufacturing high-density and long-coherence-time cold atom sources. According to the integrating sphere magnetism-insensitive imprisoning system, an Ioffe-Pritchard micro magnetic trap is formed through an aligning Helmholtz coil and a single wire, and the magnetism-insensitive atomic state is searched for through a gradient field generated by the micro magnetic trap. The integrating sphere magnetism-insensitive imprisoning system has the advantages of being simple, small in size, low in power consumption, convenient to operate and favorable for forming coherent control researches on the atomic state in an integrating sphere, and a new technology is provided for finally developing small high-accuracy satellite-borne atomic clocks.

Description

technical field [0001] The invention relates to a magnetic trap system with miniaturization and low power consumption, in particular to an integrating sphere magnetic insensitivity trap system. The generated gradient field is used to search for magnetically insensitive atomic states, thereby preparing a high-density, long coherence time cold atom source. It has the characteristics of simple device, small size, low power consumption and convenient operation, and provides a better experimental platform for the development of high-precision miniaturized spaceborne atomic clocks. Background technique [0002] Integrating sphere cooling is a new laser cooling technology proposed for the first time by academician Wang Yuzhu of Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences. It uses the change of diffuse reflection light field angle to automatically offset the Doppler effect of atoms, which is different from traditional optical sticky groups and magneto-opt...

Claims

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Application Information

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IPC IPC(8): H05H3/02
Inventor 王文丽邓见辽王育竹
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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