Method and device for reducing microwave power frequency shift of atomic frequency standard

Abstract

The invention discloses a device for reducing the microwave power frequency shift of an atomic frequency standard. The device comprises a synchronous phase discrimination module, a voltage sampling module, a photodetection signal feedback module and a differential amplification module, wherein the synchronous phase discrimination module is used for performing synchronous phase discrimination on aphotodetection signal output by a physical system to obtain a deviation rectifying voltage; the voltage sampling module is used for converting a photodetection signal into a photodetection voltage signal; the photodetection signal feedback module is used for calculating a difference value between a maximum peak and a minimum peak of the photodetection voltage signal transmitted by the detection voltage sampling module, and amplifying the difference value to obtain a DC voltage; and the differential amplification module is used for amplifying the DC voltage transmitted by the photodetection signal feedback module and the deviation rectifying voltage transmitted by the synchronous phase discrimination module, calculating the difference value between the DC voltage and the deviation rectifying voltage to obtain a quantum deviation rectifying signal, and making the quantum deviation rectifying signal function in a voltage-controlled crystal oscillator. The device for reducing the microwave power frequency shift of the atomic frequency standard can reduce the microwave power frequency shift, thereby improving the frequency stability of a rubidium atomic frequency standard. The invention also discloses a method for reducing the microwave power frequency shift of the atomic frequency standard.

Description

technical field [0001] The invention relates to the field of passive rubidium atomic frequency standards, in particular to a method and device for reducing microwave power frequency shift of atomic frequency standards. Background technique [0002] The atomic frequency standard is a frequency source with excellent stability and accuracy, and has been widely used in the fields of satellite positioning, navigation and communication, instrumentation, and astronomy. The rubidium atomic frequency standard has become the most widely used atomic frequency standard because of its advantages of small size, light weight, low power consumption, and low cost. [0003] The rubidium atomic frequency standard mainly includes voltage-controlled crystal oscillators, physical systems and electronic circuits. The physical system specifically includes a spectral lamp that generates pumping light, an integrated filter resonant bubble that stores rubidium atoms, a microwave cavity that stores mi...

AI Technical Summary

Problems solved by technology

When the power of the microwave interrogation signal transmitted to the physical system, that is, the microwave power, changes, the relative changes in the first transition line and the second transition line are inconsistent, thus causing the center frequency of the superimposed line to change, resulting in The frequency shift of microwave power affects the frequency stability of the atomic frequency standard

In addition, it has been tested that the microwave power is proportional to the output frequency of the atomic frequency standard and the optical detection signal. Therefore, the increase in microwave power will lead to an increase in the output frequency of the atomic frequency standard, resulting in error correction

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