A digital integrated cpt atomic clock control system

Abstract

The invention discloses a digital integration CPT atomic clock control system which comprises a microcontroller, a multipath D / A converter, a temperature-compensation crystal oscillator, a frequency multiplier circuit, a summator, a voltage-controlled current source, a Bias-T, a photoelectric switching circuit, a high-Q-value filter and a phase sensitive detection circuit. The whole circuit system is controlled by the microcontroller to work, the circuit structure is simple, and debugging is convenient; the circuit system adopts the only one phase sensitive detection circuit, the phase sensitive detection circuit is a composite circuit when an atomic clock is locked, laser frequency and microwave frequency can be locked through software setting, and the size and power consumption of the circuit are lowered; the high-Q-value filter is added between the photoelectric switching circuit and the phase sensitive detection circuit, so that the signal-to-noise ratio of the circuit is greatly increased.

Description

technical field [0001] The invention relates to the technical field of atomic clocks, in particular to a digitally integrated CPT atomic clock control system. Background technique [0002] Atomic clocks based on the Coherent Population Trapping (CPT) phenomenon can achieve low power consumption, miniaturization and even chip design because they do not require microwave cavities, which is the current development trend in the field of atomic clock technology. Compared with traditional atomic clocks, CPT atomic clocks have the characteristics of small size, low power consumption, and fast start-up. They can not only be used in civil communication networks and other fields to obtain highly reliable time synchronization networks, but can also be applied to small satellites / microsatellite platforms. The frequency-time-frequency source of the clock unit and the payload improves the capabilities of satellite time synchronization, time difference / frequency difference measurement, ran...

AI Technical Summary

Problems solved by technology

At present, most of the commonly used CPT atomic clock electronics systems are digital-analog hybrid circuits that use microcontrollers or FPGAs as control units. The utilization rate of control units is low. Two independent phase-sensitive detection circuits are used to lock the microwave frequency and laser frequency respectively. , increasing the circuit size and power consumption

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