A rubidium atomic clock device based on differential light detection

Abstract

The invention discloses a rubidium atomic clock device based on differential light detection, the device comprising a rubidium spectrum lamp device and a light detection signal generating device. Therubidium spectrum lamp device comprises a rubidium spectrum lamp bulb, an oscillation coil and a radio frequency oscillation circuit board. The rubidium spectrum lamp bulb outputs two completely symmetrical optical signals, and two groups of oscillation coils are symmetrically wound on the side wall of the rubidium spectrum lamp bulb and are electrically connected with the radio frequency oscillation circuit board. The light detection signal generating device comprises a first light detection signal generating device and a second light detection signal generating device symmetrically arrangedat both ends of the rubidium spectrum bulb, and the first light detection signal generating device and the second light detection signal generating device respectively lead out one light detection signal in the same way. The invention is advantageous in reducing optical noise and improving short-term frequency stability index of the whole machine. Two optical signals pass through completely symmetrical optical components, and the background noise of the spectrum lamp and the shotcrete noise of the detector are weakened through the difference of the detection signals; the background noise of the spectrum lamp and the shotcrete noise of the detector are reduced. It is beneficial to reduce the influence of temperature fluctuation and improve the long-term frequency stability 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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