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Hollow beam laser cooling cylindrical integral sphere device

A hollow beam and laser cooling technology, applied in optics, optical components, instruments, etc., can solve the problems of reducing clock signal contrast, unbalanced Ramsey transition, etc., and achieve the effect of improving signal-to-noise ratio and contrast

Active Publication Date: 2018-03-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 2. There are still a large number of cold atoms in a large range on both sides of the detection axis, and non-equilibrium Ramsey transitions will occur, reducing the contrast of the clock signal

Method used

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  • Hollow beam laser cooling cylindrical integral sphere device
  • Hollow beam laser cooling cylindrical integral sphere device
  • Hollow beam laser cooling cylindrical integral sphere device

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0024] see first figure 2 . figure 2 It is a schematic diagram of the vacuum system of the present invention. As can be seen from the figure, the vacuum system of the hollow beam laser cooling cylindrical integrating sphere of the present invention includes a four-way cavity 1-4, the interface is a knife-edge flange with a diameter of 35mm, and a copper coil is used for vacuum sealing; the four-way cavity 1-4 The first port of 4 is connected to the rubidium source 1-2 and the rubidium source valve 1-1 in turn; the second port of the four-way cavity 1-4 is connected to the cylindrical integrating sphere 1-3, and the outer diameter of the integrating sphere is 71mm. The height is 44mm, spray diffuse reflection material on the cylindrical integrating sphere 1-3, and connec...

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Abstract

A hollow beam laser cooling cylindrical integral sphere device comprises a vacuum system and an optical system, hollow beams are injected into a cylindrical integral sphere cavity through an annular reflector, and a diffuse reflection light field is formed in a cylindrical integral sphere, so that atoms are cooled. By the aid of a specific light field structure of the hollow beams, the cold atom density of a detecting axis is increased, cold atom distribution on the periphery of the axis is reduced, so that the signal-to-noise ratio and the contrast ratio of detection signals of a cold atom clock of the integral sphere are increased, and the device is of great significance for optimization of performance and stability indexes of the cold atom clock of the integral sphere.

Description

technical field [0001] The invention relates to the laser cooling technology of atomic clocks, in particular to a hollow beam laser cooling cylindrical integrating sphere device. The device increases the density of cold atoms on the detection axis of the integrating sphere while reducing the distribution of cold atoms around the axis, thereby improving the stability of the clock signal. Background technique [0002] Atomic clocks are the core of the global positioning system. The accuracy and stability of atomic clocks determine the accuracy of navigation and positioning and the performance of the system. High-precision spaceborne atomic clocks are an urgent need for the construction of high-precision earth observation systems and high-precision satellite navigation systems in my country. Integrating sphere cooling of neutral atoms has the advantages of simple device, no need for magnetic field, small size, light weight, and easy implementation, and will be used as the next ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G04F5/14
CPCG02B27/0911G02B27/0927G02B27/0972G04F5/14
Inventor 王鑫孟艳玲叶美凤成华东刘亮
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI