Coherent maser radiation cold atomic clock

Abstract

The present invention discloses a coherent microwave-radiation cold atomic clock; and an ion pump is connected with a vacuum catheter which is connected with a microwave cavity; a light window is fixed in the microwave cavity by quartz glass and three reflective mirrors; a pair of anti-Helmholtz coils and a pair of Helmholtz coils are fixed on the microwave cavity; a pair of rectangular coils arefixed on the microwave cavity; a magnetic shielding system is connected with a vacuum system; semiconductor laser provides captive light and beams of pump-back light; a semiconductor laser on the vertical cavity surface provides a plurality of beams of captive light; a voltage-controlled crystal oscillator is connected with a frequency synthesizers connected with a signal receiver and processor; the semiconductor laser on the vertical cavity surface is connected with the microwave cavity; a photoelectric detector and a microwave-power receiver are connected with the signal receiver and processor connected with the voltage-controlled crystal oscillator as well as the semiconductor laser on the vertical cavity surface. The present invention is characterized in that the structure is compact and the size is small, and has good stability, high accuracy as well as good applicability.

Description

technical field [0001] The invention relates to the field of atomic clocks, more specifically to a coherent microwave radiation cold atomic clock, which uses cold atoms with a thick optical thickness in a strip-shaped magneto-optical trap as a working substance, and acts on the sideband of a microwave cavity and a microwave-modulated laser Under this condition, the vertical cavity surface-emitting semiconductor laser and the voltage-controlled crystal oscillator are synchronously locked by using the coherent population number-confined absorption detection signal and the coherent microwave radiation microwave power reception signal, which are suitable for timing, timing, ranging, navigation, positioning, Communication time synchronization and other fields. Background technique [0002] Atomic frequency standards have come a long way in the past 50 years. Active hydrogen atomic clocks are stable at 10 -16 order of magnitude, the accuracy of the cesium atomic fountain clock i...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a coherent microwave radiation cold atomic clock, which adopts a strip-shaped magneto-optical trap system, and solves the problem of relatively long interaction transit time between atoms and light in the coherent population number trapping of cold atoms by increasing the optical thickness of cold atomic groups. Short question: use coherent microwave radiation to realize active coherent population number confinement, use coherent population number prisoner absorption detection signal and coherent microwave radiation power detection signal to realize synchronous locking of vertical cavity surface emitting semiconductor laser and voltage controlled oscillator, Solving the Accuracy and Stability of Coherent Population-Trapped Cold Atomic Clocks

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