Chip atomic clock based on vacuum adiabatic miniature atomic gas chamber and its realization method

Abstract

The invention discloses a chip atomic clock based on a vacuum adiabatic miniature atomic gas chamber and its realization method. The chip atomic clock includes: a 795nm vertical cavity surface emitting laser VCSEL, a quarter-wave plate, a vacuum adiabatic miniature atomic gas chamber, magnetic field and temperature control devices, photodetectors, and integrated circuitry; the integrated circuitry includes microwave sources, servo circuitry, and crystal oscillators. The VCSEL is connected to a quarter-wave plate; the laser emitted by the VCSEL generates frequency-modulated polychromatic circularly polarized light through the quarter-wave plate, and the frequency-modulated polychromatic circularly polarized light is connected to the vacuum heat-insulated miniature atomic gas chamber equipped with a magnetic field and temperature control device. Atoms interact to generate a coherent layout number prisoner resonance signal; the photodetector detects the layout number prisoner resonance signal and sends it to the integrated circuit system; the servo circuit system in the integrated circuit system feeds back the layout number prisoner resonance signal to the integrated circuit system The crystal oscillator, so as to output the standard frequency signal.

Description

technical field [0001] The invention belongs to the technical field of small atomic frequency standards, and relates to a rubidium atomic chip atomic clock, in particular to a chip atomic clock based on a vacuum heat-insulated miniature atomic gas chamber and a realization method thereof. Background technique [0002] Atomic clocks are currently the most accurate timekeeping instruments and frequency standards, and are widely used in navigation and positioning, astronomical observations, precision instrumentation, and geophysical exploration. Due to the large volume and high power consumption of traditional atomic clocks, their application development in the above fields is limited. Compared with traditional atomic clocks, chip atomic clocks have the advantages of small size, low power consumption, and low cost. They can be used in GPS systems, portable communication and navigation equipment, and small drones. They are very promising atomic clocks. [0003] The chip atomic ...

AI Technical Summary

Problems solved by technology

[0006] The single-layer atomic gas chamber used in the prior art has strong thermal conductivity, and its heat insulation effect is poor. The fluctuation of the external temperature of the gas chamber will cause the temperature drift of the atoms in the gas chamber, which will affect the drift of the clock transition frequency and limit the chip. Further improvement of medium and long-term frequency stability indicators of atomic clocks

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