Beam type atomic clock frequency locking device based on laser-induced fluorescence signal
A technology of laser-induced fluorescence and frequency locking, applied in automatic power control, electrical components, etc., can solve problems such as high index of beam-type atomic clocks, system noise, stability, reliability, and operation speed limitations, and achieve improved stability Accuracy and accuracy, the effect of improving the signal-to-noise ratio
Pending Publication Date: 2021-08-03
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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[0007] To sum up, due to the extremely high index of the beam-type atomic clock, there are very strict restrictions on the noise, stability, reliability, and operation speed of the system
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[0080] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0081] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0082] The beam-type atomic clock frequency locking device based on the laser-induced fluorescence signal provided in this embodiment can be used for locking the frequency signal output by the beam-type atomic cloc...
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The invention discloses a beam type atomic clock frequency locking device based on a laser-induced fluorescence signal. The device comprises a power supply module which is used for converting an external input power supply into a power supply voltage required by an internal module and separating a digital ground from an analog ground so as to distinguish a digital power supply and an analog power supply; the fluorescence signal conversion module is connected with the power supply module and is used for converting a fluorescence signal generated in the atomic beam tube into a voltage signal comprising a path of direct-current voltage signal and at least one path of alternating-current voltage signal; the digital operation module is connected with the power supply module and the fluorescence signal conversion module and is used for generating a correction signal according to the voltage signal; and the deviation rectification signal output module is connected with the power supply module and the digital operation module and is used for outputting a deviation rectification signal so as to control the output frequency of the voltage-controlled crystal oscillator. The signal-to-noise ratio of the locking device can be improved, and the output frequency of the voltage-controlled crystal oscillator is locked at the atomic transition frequency in a high signal-to-noise ratio manner, so that the stability and the accuracy of the output frequency of the crystal oscillator are improved.
Description
technical field [0001] The invention relates to the field of atomic clock frequency locking, in particular to a beam-type atomic clock frequency locking device based on laser-induced fluorescence signals. Background technique [0002] The 13th International Conference on Weights and Measures defined in 1967 that "a second is the duration of 9192631770 cycles of radiation corresponding to the undisturbed transition between the two hyperfine energy levels of the ground state of the cesium 133 atom", which marked that the world has entered atomic time era. Atomic time is generated and maintained by atomic clocks. There are many types of atomic clocks, but beam atomic clocks are the only atomic clocks that can provide accuracy indicators in the current family of engineering atomic clocks, and their long-term frequency stability is excellent, and the frequency drift can even be negligible. [0003] According to the different physical mechanisms for generating the required atomic...
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Login to View More IPC IPC(8): H03L7/26
CPCH03L7/26
Inventor 李孝峰李超刘杰孙富宇张首刚
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI