Microwave electric field intensity meter based on cold Rydberg atom interferometer and measuring method thereof

An atomic interferometer and cold atom technology, applied in the direction of electrostatic field measurement, etc., can solve the problems of limited precision of microwave electric field measurement, detection of light transparent window width, etc., and achieve the effects of small probability, long energy level life, and small interference

Active Publication Date: 2015-09-02
清远市天之衡量子科技有限公司
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Problems solved by technology

[0003] At present, experimental measurements and theoretical analysis show that the measurement accuracy of microwave electric field based on thermal Rydberg atomic quantum interference effect is limited by the width of the probe light transparent window

Method used

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  • Microwave electric field intensity meter based on cold Rydberg atom interferometer and measuring method thereof
  • Microwave electric field intensity meter based on cold Rydberg atom interferometer and measuring method thereof
  • Microwave electric field intensity meter based on cold Rydberg atom interferometer and measuring method thereof

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Embodiment 1

[0037] Such as figure 1 As shown, the microwave electric field intensity meter based on the cold Rydberg atomic interferometer of the present embodiment includes a photodetector 1, a vacuum system 2, a laser 4 and a microwave source 5, and the photodetector 1, the laser 4 and the microwave source 5 launch directions are all towards the vacuum system, where:

[0038] The vacuum system 2 is used to cool the trapped atoms to produce cold atomic groups 3, which is a glass vacuum chamber, and the inside of the glass vacuum chamber is a high vacuum, which reduces the influence of background hot atoms on the cold atomic groups 3 and improves the accuracy of measurement; The cold atomic group 3 is used to prepare the Rydberg state and produce an interference effect, so that the coherent atomic state produces a phase difference; the atom in this embodiment is a rubidium atom (Rb);

[0039] The laser 4 is used to generate coupling light with a wavelength of 480nm and probe light with a...

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Abstract

The invention discloses a microwave electric field intensity meter based on a cold Rydberg atom interferometer and a measuring method thereof. The microwave electric field intensity meter comprises: a vacuum system, which is used for cooling and trapping atom to generate a cold atom cloud for preparing a Rydberg state and generating an interference effect so as to generate a phase difference by coherent atomic states; a laser, which is used for generating coupling light and detection light and exciting the cold atom in the vacuum system from a ground state to the Rydberg state coherently; a photoelectric detector, which is used for detecting an interference fringe generated by two beams of cold atom clouds due to coherence; and a microwave source, which is used for generating a microwave electric field. According to the invention, when the microwave electric field intensity meter is applied to the evolution process of coherent beam splitting and combination, the atom cloud in the Rydberg state interacts with a to-be-measured microwave electric field, thereby generating an alternating-current stark effect; and the to-be-measured microwave electric field intensity is associated with a phase generated by the an alternating-current stark, thereby realizing precise measurement of the microwave electric field.

Description

technical field [0001] The invention relates to a microwave electric field intensity meter and a measuring method thereof, in particular to a microwave electric field intensity meter based on a cold Rydberg atom interferometer and a measuring method thereof, belonging to the technical field of electric field intensity measurement. Background technique [0002] In 2012, the Shaffer research group of Oklahoma University in the United States cooperated with the Pfau research group of Stuttgart University in Germany for the first time to use thermal Rydberg atom EIT and AT splitting to convert the measurement of microwave electric field intensity into optical frequency measurement, and realized the measurement of microwave electric field experimentally. , the minimum electric field strength measured is 8μVcm -1 , the sensitivity is Far superior to the traditional dipole antenna microwave electric field meter. Then in 2013, based on the original experiment, they realized the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/12
Inventor 邓志韬吕庆先梁振涛杜炎雄颜辉黄巍
Owner 清远市天之衡量子科技有限公司
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