Cold atom all-optical state selection device

Abstract

A cold atom all-optical state selection device comprises vacuum flange, an optical state-selecting region, a magneto-optical trap, and a cavity base connected in sequence from top to bottom; when thecold atomic fountain clock starts to work, based on the magneto-optical trap cooling, trapping to get cold atomic groups and simultaneously preparing the clock state during the throwing of the cold atomic groups. The invention not only greatly increases the number density of the clock state atoms, but also shortens the height of the whole clock, thereby greatly shortening the dead time of the intermittent clock, thereby achieving the purpose of shortening the cycle and improving the short-term stability of the cold atomic clock. The device has a simple structure and is easy to implement, and can be used as a core device of a laser cold atomic clock.

Description

technical field [0001] The invention relates to laser cooling and optical pumping technology, especially a device mainly used for cold atomic clock and clock state preparation. Background technique [0002] With the launch of the space cold atomic clock, my country has become the first country in the world to operate a space cold atomic clock in orbit. Based on satellite navigation, deep space exploration and other needs. The cold atomic clock is not just a time device, it is actively researched and applied by countries all over the world as a platform for scientific experiment research and engineering applications. Cold atomic clocks play an increasingly important role in our daily life and scientific research. [0003] Magneto-optical traps are mainly based on laser cooling technology. Atoms are cooled under the action of a hybrid force trap of a static magnetic field and an optical field. The invention of the magneto-optical trap has brought great convenience to laser...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned state selection system includes two parts of microwave and optics, the device is complex, and there are many problems in the specific application process:

This is not conducive to the improvement of the signal-to-noise ratio of the clock signal;

[0008] 2) The structure is complex, with an extra microwave cavity, which increases the overall length of the clock and the dead time of the intermittent clock, thereby increasing the period of the clock and reducing the short-term stability of the clock;

[0009] 3) Including the microwave cavity, the overall volume and weight of the clock are serious tests, which is even more unfavorable for the miniaturization of the clock

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