A rubidium atomic frequency standard

Abstract

The invention discloses a rubidium atomic frequency standard and belongs to the field of atomic frequency standard. The rubidium atomic frequency standard includes a light source, a resonance transition module, a radio frequency signal generation module, a photoelectric detection module, and a central processing unit. The resonance transition module and the photoelectric detection module are sequentially arranged on the output optical path of light generated by the light source, and the radio frequency signal generation modules are respectively It is connected with the resonance transition module and the central processing unit, and the photoelectric detection module is connected with the central processing unit. The rubidium atomic frequency standard also includes an optical switch and a power detection module. The optical switch is set on the output optical path of the light generated by the light source and is located between the light source and the resonance transition module Between, the optical switch is connected with the central processing unit, and the power detection module is respectively connected with the resonance transition module and the central processing unit. The present invention controls the action time of the pumping optical pulse by controlling the opening and closing of the optical switch by the central processor, shortens the loop response time in the rubidium atomic frequency standard, speeds up the closed-loop working time, and thus reduces the optical frequency shift of the rubidium atomic frequency standard .

Description

technical field [0001] The invention relates to the field of atomic frequency standards, in particular to a rubidium atomic frequency standard. Background technique [0002] An atomic frequency standard is a device that provides standard frequency and time. The rubidium atomic frequency standard has become the most widely used atomic frequency standard because of its small size, low power consumption and good ability to withstand harsh environments. [0003] In the application field of atomic detection, in order to improve the signal-to-noise ratio, the rubidium atomic frequency standard adopts the method of optical pumping. However, since the pumping light is not monochromatic light, but the superposition of multiple spectral lines with a certain line width and linear function, the pumping light will cause the shift of the transition frequency of rubidium atoms, that is, the optical frequency shift. In essence, the optical frequency shift is the average effect of the AC S...

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Problems solved by technology

[0004] In order to solve the problem in the prior art that it takes too long for the normal lighting and stabilization after each light source is turned off, which is not conducive to the fast closed-loop operation of the atomic clock servo system and makes the loop response time longer, the embodiment of the present invention provides a Rubidium atomic frequency standard

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