A Rubidium Atomic Clock Device Based on Differential Optical Detection

Abstract

The invention discloses a rubidium atomic clock device based on differential light detection, which includes a rubidium spectrum lamp device and a photodetection signal generating device; the rubidium spectrum lamp device includes a rubidium spectrum light bulb, an oscillating coil and a radio frequency oscillation circuit board, and the two outputs of the rubidium spectrum light bulb are completely symmetrical Two groups of oscillating coils are symmetrically wound on the side wall of the rubidium spectrum bulb and electrically connected with the radio frequency oscillating circuit board; the light detection signal generating device includes a first light detection signal generating device and a second light detection signal generation device symmetrically arranged at both ends of the rubidium spectrum bulb The photodetection signal generation device, the first photodetection signal generation device and the second photodetection signal generation device are the same to lead out one photodetection signal respectively. The invention is beneficial to reduce optical noise and improve the short-term frequency stability index of the whole machine. The two-way optical signals pass through completely symmetrical optical components, and the background noise of the spectrum lamp and the shot noise in the detector are weakened by differential detection signals. ; It is beneficial to reduce the influence of temperature fluctuations and improve the long-term frequency stability index of the whole machine.

Description

technical field [0001] The invention belongs to the technical field of atomic clocks, in particular to a rubidium atomic clock device based on differential light detection. Background technique [0002] With the development of science and technology, global satellite positioning system, mobile communication, radar system, traffic control system, laser ranging, power dispatching and other fields need more stable and accurate time and frequency signals to achieve reliable work. Traditional mechanical oscillators, Crystal oscillators are no longer adequate. Atomic frequency standards have been used more and more widely for their extremely high stability and accuracy. However, the stability and accuracy of the rubidium atomic frequency standard largely depend on the characteristics of the physical system. The signal-to-noise ratio of the atomic transition signal of the physical system is a key factor that directly affects the stability of the rubidium frequency standard. There...

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Problems solved by technology

[0002] With the development of science and technology, global satellite positioning system, mobile communication, radar system, traffic control system, laser ranging, power dispatching and other fields need more stable and accurate time and frequency signals to achieve reliable work. Traditional mechanical oscillators, Crystal oscillators are no longer adequate

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