Alkali metal steam pool capable of accurately controlling atomic density

Abstract

The invention belongs to the field of alkali metal atom steam pools and provides an alkali metal steam pool capable of accurately controlling atomic density. The alkali metal steam pool comprises a steam pool body, a detecting device, a calculating unit and a servo control system, wherein the steam pool body is provided therein with a suction atomic plate, an alkali metal source distributor and avortex; the detecting device comprises a light source and a detector; the frequency scanning laser light emitted by the light source is received by the detector through the steam pool body and is sentto the calculating unit; the calculating unit calculates the atomic density according to a detecting signal and sends the atomic density to the servo control system; the servo control system is configured to compare the real-time atomic density information with the preset atomic density to extract an error signal, and control the density of alkali metal atoms in the steam pool through multi-channel servo feedback. The alkali metal steam pool solves the difficulty in real-time display and precise control of atomic density in the alkali metal steam pool, has stable speed and high precision, andcan be widely applied in the field of alkali metal steam pools.

Description

technical field [0001] The invention belongs to the field of alkali metal atom steam pools, in particular to an alkali metal steam pool which can precisely control the atomic density. Background technique [0002] Alkali metal vapor cells are widely used in many frontier fields such as atomic physics, laser optics, sensors, and precision measurement. They are used to provide stable alkali metal vapor sources to interact with lasers. The density stability of alkali metal vapor systems directly determines the accuracy of research results. Reliability and performance of results-dependent applications. Therefore, research in many related fields urgently needs an alkali metal vapor cell that can provide precise and stable atomic density. [0003] For the control of the atomic density in the alkali metal vapor pool, the traditional method is to use the empirical density formula to control the temperature of the atomic gas chamber, so as to control the atomic density. Although thi...

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Problems solved by technology

[0003] For the control of the atomic density in the alkali metal vapor pool, the traditional method is to use the empirical density formula to control the temperature of the atomic gas chamber, so as to control the atomic density. Although this method is simple, the temperature error of the atomic vapor pool is large, relatively Low precision; and temperature control requires considerable energy consumption, especially the cooling process, and the control dynamic range is small

Photoinduced atomic desorption and laser heating of alkali metal sources can only increase the density of alkali metal atoms in one direction, which is relatively limited for the realization of a controllable density atomic vapor pool.

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