Microwave power measuring device and method based on Rydberg atom quantum coherence effect

A technology of microwave power and measuring device, which is applied in the direction of measuring device, measuring electric power, electric device, etc., can solve the problems of limited measurement frequency, high uncertainty, complexity, etc., and achieves small measurement uncertainty and large dynamic range. , the effect of high sensitivity

Active Publication Date: 2019-09-20
国仪计测(深圳)量子科技有限公司
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Problems solved by technology

[0006] Aiming at the problems that the traditional power measurement method is difficult to accurately measure and analyze in the high frequency band and the measurement method based on the Rabi frequency has complex equi

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  • Microwave power measuring device and method based on Rydberg atom quantum coherence effect
  • Microwave power measuring device and method based on Rydberg atom quantum coherence effect
  • Microwave power measuring device and method based on Rydberg atom quantum coherence effect

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Embodiment Construction

[0031] In order to facilitate the understanding of the present invention, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following description is only for the convenience of explaining the present invention, not as a specific limitation on its scope.

[0032] The invention provides a device for measuring the microwave power of a guided wave system based on the Rydberg atomic quantum coherence effect. In order to accurately measure the microwave power in the waveguide structure, it is first necessary to analyze the electric field inside the rectangular waveguide. The weak probe laser and the strong coupling laser propagate in opposite directions along the guided wave system and act on the ground state atoms.

[0033] figure 1 Rubidium ( 87 Energy level structure diagram of Rb) atom, weak probe laser (~780nm) acts on the ground state 5S 1 / 2 (F=2) to intermediat...

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Abstract

The invention relates to a microwave power measuring device and a measuring method based on the Rydberg atom quantum coherence effect. A low electromagnetic perturbation atom air chamber equipped with helium vapor is placed in a guided wave system. Two lasers are used to excite ground state rubidium atoms to the Rydberg state. Based on the quantum effect, the measurement of the guided wave electric field is converted into the measurement of the atomic absorption spectrum. The analytical and quantitative relationship between power and the guided wave electric field is used to achieve microwave power measurement traceable to Planck constants. The measuring method provided by the invention has the advantages of high sensitivity, large dynamic range, small measurement uncertainty and the like.

Description

technical field [0001] The invention relates to the field of microwave measurement, in particular to a microwave power measurement device and method based on the Rydberg atomic quantum coherence effect. Background technique [0002] Power is an important parameter in radio metering systems. The traditional microwave power reference is an indirect measurement of power by means of calorimetry, usually using a DC substitution method to compare the heat generated by microwave power with the heat generated by DC power. In recent years, my country has successively established a series of microwave and millimeter wave power benchmarks, covering frequencies from 10MHz to 170GHz, and the measurement uncertainty can be controlled within 1.0% (k=2) below 110GHz. However, as the frequency is further increased, it is difficult to accurately evaluate problems such as reflection, transmission loss and heat leakage in the high frequency band by microwave power measurement based on calorime...

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Application Information

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IPC IPC(8): G01R21/00
CPCG01R21/00
Inventor 宋振飞屈继峰张万锋邹海洋张杰
Owner 国仪计测(深圳)量子科技有限公司
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