CPT atomic clock servo circuit

Abstract

The invention relates to a coherent population trapping (CPT) atomic clock servo circuit, which comprises a microcontroller, wherein a signal input end of the microcontroller is connected with a photoelectric detector of an atomic clock physical unit; a signal output end of the microcontroller is connected with a laser of the atomic clock physical unit sequentially through a frequency signal output circuit and a frequency conversion stage circuit; the signal output end of the microcontroller is connected with the laser of the atomic clock physical unit through a constant current source circuit; and the signal input end and the signal output end of the microcontroller are connected with a temperature control circuit and a magnetic field monitoring circuit respectively. The CPT atomic clockservo circuit takes the microcontroller as a control core, is responsible for monitoring temperature and magnetic fields, controlling digital devices, performing phase sensitive detection, producing square wave modulation signals, and regulating and controlling constant current source current, and realizes the automatic scanning and locking control on laser frequency and microwave frequency. The CPT atomic clock servo circuit realizes small volume digitalization and handy control, simplifies the realization of circuits, reduces the possibility that signals are interfered, and is low in cost, high in stability and low in power consumption.

Description

[0001] technical field [0002] The invention relates to a CPT atomic clock servo circuit. [0003] Background technique [0004] Research on atomic clocks mainly focuses on two aspects: one is to explore and develop atomic clocks with higher accuracy and stability. In recent years, many different types of new atomic clocks with higher accuracy and stability have been successfully developed. For example, cold atomic fountain clocks, ion trap clocks, optical clocks, etc.; on the other hand, we are actively looking for ways to realize high-precision small-scale engineering atomic clocks to meet the development needs of various engineering technologies, such as developing small-scale spaceborne atomic clocks, using coherent The principle of population confinement develops miniaturized coherent population confinement atomic clocks. [0005] Coherent Population Trapping (CPT, Coherent Population Trapping) is a quantum interference phenomenon produced by the interaction between ...

AI Technical Summary

Problems solved by technology

[0006] In practice, the general CPT desktop experiment system only pursues the convenience of commissioning, and does not consider the volume and power consumption. However, the miniature or even chip-level CPT atomic clocks really pay attention to the reduction of volume and power consumption, but it is not convenient for commissioning.

The indicators of the CPT atomic clocks realized so far are not very high, mainly in the serious temperature drift phenomenon, high power consumption caused by temperature control, and the stability of the output signal of the atomic frequency standard is low.

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