POP rubidium atomic clock capable of reducing laser noise

Abstract

The invention discloses a POP rubidium atomic clock capable of reducing laser noise. The POP rubidium atomic clock comprises an optical system, a physical system, a detection system and a polarization device. The polarization device is located on a laser light path from the optical system to the physical system; the detection system comprises a laser beam splitting sheet, a first detector, a second detector, a signal acquisition processor, a servo loop, a voltage-controlled crystal oscillator and a frequency synthesizer; the laser beam splitting sheet is positioned on an output light path of the physical system and is used for splitting light output by the physical system into two paths; the first detector and the second detector are respectively positioned in two light paths split by the laser beam splitting sheet; the signal acquisition processor divides the difference output by the two detectors by the sum output by the two detectors to obtain a Faraday rotation angle; and the servo loop calculates a feedback voltage signal based on the Faraday rotation angle and feeds back the feedback voltage signal to the voltage-controlled crystal oscillator. The influence of intensity noise and power fluctuation of the laser on the stability of the atomic clock is reduced.

Description

technical field [0001] The invention relates to a bubble type atomic clock, in particular to a POP rubidium atomic clock capable of reducing laser noise. Background technique [0002] Atomic clocks are the product of a high degree of integration of quantum physics and electronics, and one of the most outstanding achievements in the technical application of spectroscopy. Among them, the most widely used rubidium atomic clock has the characteristics of small size, low price, fast warm-up, and low power consumption. It is a traditional practical atomic frequency standard. The pumping light source of the traditional rubidium atomic clock is through the electrodeless discharge 87 Rb lights and 85 Realized by the Rb filter bubble combination, the light intensity and spectral line shape function of the pumping light have complex and slow changes over time, which makes the medium and long-term stability of the traditional rubidium atomic clock worse. The light produced by the rub...

AI Technical Summary

Problems solved by technology

In the experiment, the laser needs to be divided into two paths, one is used to stabilize the laser power, and the other is used for experimental detection. The structure is complex, and the power fluctuations of the two paths are not synchronized, so that the fluctuations in the laser power stabilization ring cannot be realized in practice. Response to the power fluctuation of the experimental optical path

Images