Single electron atom light clock and preparation method thereof

Abstract

The invention belongs to the technical field of atomic clocks and frequency standards and particularly relates to a single electron atom light clock and a preparation method thereof. In the technical scheme adopted by the invention, transition of a laser frequency band between a ground state and a second excited state of a single electron atom is used as a quantum frequency standard of an optical frequency band and an optical comb is combined to obtain the light clock implemented after the frequency is transferred. In the scheme, a cesium atom is used as an example, the narrow spectrum line width characteristic of the second excited state of the cesium atom can be utilized, and a magnetic sub energy level in an outer magnetic field generated by a coil can be decomposed out for laser frequency stabilization. Temperatures of the magnetic field and an atomic furnace can be controlled to optimize a system to enable the system to be in a good working state. Additionally, due to the housing design of the system, electromagnetic interference of the outside can be shielded. By regulating the current and the temperature of a semiconductor laser and controlling the voltage of a piezoelectric ceramic with a cavity length, the final output frequency of laser is stabilized on a transition spectral line of the cesium atom, which has a wavelength of 459nm from 6S to 7P1 / 2 or 455nm from 6S to 7P3 / 2.

Description

technical field [0001] The invention belongs to the technical field of atomic clocks and frequency markers, and in particular relates to a single-electron atomic optical clock and a preparation method thereof. Background technique [0002] At present, atomic clocks are divided into microwave atomic clocks and optical frequency atomic clocks according to their operating frequencies. The atomic transition frequency of the microwave atomic clock is in the microwave frequency range, while the optical frequency atomic clock called the optical clock is realized by using the optical frequency band transition between atomic energy levels. Specifically, microwave atomic clocks must use microwaves to interact with atoms, and then stabilize the frequency; while optical clocks use stabilized lasers to interact with the clock transition energy levels of atoms to stabilize the frequency. Among the most commonly used microwave atomic clocks at present, one of them is the microwave cesium ...

AI Technical Summary

Problems solved by technology

Although some microwave cesium atomic clocks also use lasers to realize the energy state preparation and detection, the clock transitions realized by them are just the well-known microwave transitions of 9.192631770 GHz used to define the "second" in the International System of Units

However, there are no related reports and inventions on how to provide an optical clock realized by single-electron atoms such as cesium atoms without involving atomic microwaves at all.

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