Continuous frequency electric field measuring device and method based on Rydberg atom AC Stark effect

Abstract

The invention discloses a device and a method for measuring the intensity of a continuous frequency microwave electric field based on a Rydberg atom AC Stark effect, a cesium atom steam pool is used as an atom sample pool, cesium atoms are excited to a Rydberg state under the action of detection light and coupling light emitted by two laser light sources, an electromagnetic induction transparent spectrum is generated, and the intensity of the continuous frequency microwave electric field is measured. Meanwhile, a strong electric field is used as a local field EL, the Rydberg energy level is subjected to AC Stark frequency shift and splitting, the energy level frequency shift of the Rydberg atoms is shifted to the position with the large polarizability through the AC Stark frequency shift, the induction sensitivity of the atoms to the electric field can be greatly improved, then a to-be-measured signal electric field ES is applied, the difference delta f between the frequency of the signal electric field and the frequency of the local field is smaller than 10 MHz, and the frequency of the to-be-measured signal electric field ES is smaller than 10 MHz. At the moment, the Rydberg atom serves as a frequency converter, a difference frequency signal delta f of a local field and a signal field is directly read out, the size of the difference frequency signal is in direct proportion to the ELS, the size of the signal field ES can be directly read out according to the size of the difference frequency signal, and the problem that a traditional microwave electric field measuring method is large in error is solved.

Description

technical field [0001] The invention relates to the technical field of electric field strength measurement, in particular to a continuous frequency microwave electric field strength measurement device and method based on the AC Stark effect of Rydberg atoms. Background technique [0002] The precise measurement of weak electric fields is of great significance in national defense technology, aerospace and daily life. The traditional electric field measurement method is to use a pre-calibrated electric field meter to measure the electric field to be measured. However, since the electric field meter itself needs to be calibrated, and its detection principle is to use the electric field to induce metal to generate current, the metal itself will interfere with the electric field to be measured. Therefore, the precision of the traditional measurement method is low, and its measurement sensitivity is limited by the limit of thermal noise. With the redefinition of the international...

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Problems solved by technology

[0003] In order to solve the shortcomings and deficiencies of the existing technology, a continuous frequency microwave electric field strength measurement device and method based on the AC Stark effect of Rydberg atoms is provided. Some shortcomings based on the Rydberg atomic resonance EIT-AT spectroscopy method cannot achieve arbitrary frequency electric field measurement. A continuous frequency electric field intensity measurement method and device based on the Rydberg atomic AC Stark effect is provided, and the local field is used as a gain booster. DePauw atom detection sensitivity, and the signal field to be measured and the local field beat in the Rydberg atom. By measuring the size of the beat frequency signal, the measurement of any frequency electric field can be realized. The method is directly based on the measurement of atomic parameters, which is very Very high measurement accuracy

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