Rubidium atomic optical clock based on pulse-modulated broad-spectrum multi-frequency laser and its realization method

Abstract

The invention discloses a rubidium atomic optical clock based on a pulse-modulated wide-spectrum multi-frequency laser and an implementation method, including: a power supply control system, a 420 nm pulse-modulated wide-spectrum multi-frequency laser system, a modulation transfer spectrum frequency stabilization system, a laser detection module, Laser phase detection and high-speed servo control circuit; by applying pulse modulation signal to the clock laser system, a broad-spectrum comb-tooth laser containing multiple frequency components is generated; the broad-spectrum comb-tooth laser interacts with rubidium atoms of different speed groups. It can obtain more rubidium atoms that contribute to the clock transition spectral line, improve the atomic utilization efficiency, thereby greatly improve the signal-to-noise ratio, and effectively improve the stability of the rubidium atomic optical clock.

Description

technical field [0001] The invention relates to the technical field of optical-frequency atomic clocks and optical-frequency quantum frequency standards, in particular to a rubidium atomic optical clock with a pulse-modulated wide-spectrum multi-frequency laser and a realization method thereof. Background technique [0002] Among the alkali metal elements, rubidium atoms have the advantages of low melting point, high reserves, and easy extraction. Generally, sufficient saturated vapor pressure can be prepared by heating to above room temperature in a thermal atomic gas chamber for the realization of atomic clock systems. In addition, the rubidium atomic spectral line is simple, and more atoms can contribute to the clock transition signal. Because of this, rubidium atoms are one of the most commonly used quantum references for atomic clocks. [0003] In the prior art (Atomic Beam Optical Clock of Pulse Broad Spectrum Clock Laser Detection and Its Implementation Method, Paten...

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Problems solved by technology

[0006] The first problem solved by the present invention is to solve the technical problem that only a few atoms in the ground state contribute to the transition line in the prior art, resulting in low utilization rate of atoms, thereby limiting the further improvement of the system stability index, by applying pulses to the 420nm clock laser system Modulates the signal to generate a broad-spectrum comb-shaped laser with multiple frequency components

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