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Phase comparison method angle measuring system and method based on Rydberg atom EIT effect

A technology of angle measurement and phase comparison, which is applied to measurement devices, instruments, electrical devices, etc., can solve the problems of low measurement accuracy and insufficient anti-interference ability, and achieve the effect of good anti-interference ability and improved angle measurement accuracy.

Active Publication Date: 2021-03-12
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] Aiming at the problems of low measurement accuracy and insufficient anti-interference ability when using the amplitude ratio method to achieve angle measurement based on the Rydberg atomic EIT effect

Method used

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  • Phase comparison method angle measuring system and method based on Rydberg atom EIT effect

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Embodiment Construction

[0022] The device is described below in conjunction with specific examples:

[0023] Firstly, the detection laser 1 emits detection light with a wavelength of 852nm, and the emitted detection light has a wavelength of 852nm and a power of 120±4μW, 1 / e 2 The diameter of the beam is 1.7±0.04mm, which is divided into two beams of identical probe light A and probe light B through the first beam splitter 3 (attached figure 1 The light path indicated by the thicker and lighter lines in the center), the probe light A and the probe light B are respectively reflected by the first reflector 5 and the second reflector 6 to change the propagation direction and then enter the first atomic vapor bubble 8 and the second atomic vapor bubble 9, wherein the first atomic steam bubble 8 and the second atomic steam bubble 9 are filled with cesium atom vapor of the same density and temperature, the distance between the first atomic steam bubble 8 and the second atomic steam bubble 9 is d, the first...

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Abstract

The invention relates to an angle measuring device, in particular to an angle measuring device and method based on the Rydberg atom EIT effect, and belongs to the crossing field of quantum optics andmicrowave electric field measurement. The system comprises a detection laser, a coupling laser, a first spectroscope, a second spectroscope, a first reflector, a second reflector, a third reflector, afirst atomic vapor bubble, a second atomic vapor bubble, a first local oscillator microwave source, a second local oscillator microwave source, a first dichroic mirror, a second dichroic mirror, a first photoelectric detector, a second photoelectric detector and a phase comparator. The system has the advantages that the angle obtained through measurement and the relative phase difference betweenthe microwave signals received by the first atom steam bubble and the second atom steam bubble are in linear relation, and the angle measurement precision based on the EIT effect of Rydberg atoms is expected to be further improved; and 2, the system has relatively good anti-interference capability.

Description

technical field [0001] The invention relates to the field of angle measurement, in particular to a phase comparison angle measurement system and a measurement method based on the Rydberg atomic electromagnetically induced transparency (Electromagnetically Induced Transparency, EIT) effect. Background technique [0002] Today, many scenarios require the use of angle measurement systems, such as indoor positioning, passive detection of targets, electromagnetic spectrum monitoring, etc. There are many types of existing angle measurement systems, among which the widely used ones include the amplitude comparison angle measurement method (abbreviated as the amplitude comparison method) and the phase comparison angle measurement method (abbreviated as the phase comparison method). The disadvantage of the angle measurement system using these methods is that the antenna of the angle measurement system is composed of metal, dielectric or metal-medium mixed materials. These materials w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26G01B7/30
CPCG01B7/30G01B11/26
Inventor 吴逢川林沂刘燚安强武博王延正付云起
Owner NAT UNIV OF DEFENSE TECH
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