Rydberg atom phase noise spectrum generation device and method capable of measuring microwaves

A phase noise and generating device technology, applied in the field of laser spectroscopy and quantum optics, can solve problems such as affecting spectral measurement, and achieve the effects of improving spectral measurement, enhancing system stability, and having good application prospects

Active Publication Date: 2021-07-02
SHANXI UNIV
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Problems solved by technology

These phase noises will be brought into the entire measurement loop, and will be converted into intensity fluctuations through atomic dispersion, affecting spectral measurements

Method used

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  • Rydberg atom phase noise spectrum generation device and method capable of measuring microwaves
  • Rydberg atom phase noise spectrum generation device and method capable of measuring microwaves
  • Rydberg atom phase noise spectrum generation device and method capable of measuring microwaves

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Embodiment 1

[0032] like figure 1 As shown, the embodiment of the present invention provides a Rydberg atomic phase noise spectrum generation device capable of measuring microwaves, including a first laser 1, a second laser 8, an electro-optic phase modulator 7, a first dichroic mirror 2, a second Dichroic mirror 4, atomic gas chamber 3, detector 5 and spectrum analyzer 6; the detection light sent by the first laser 1 is incident on the atomic gas chamber 3 after the first dichromatic mirror 2, and the light emitted by the second laser 8 is The coupling light is phase-modulated by the electro-optical phase modulator 7 to increase the phase noise, and after passing through the second dichroic mirror 4, it coincides with the detection light in reverse and enters the atomic gas chamber 3; the detection light transmitted through the atomic gas chamber 3 passes through the After the second dichroic mirror 4 is incident on the detector 5, the detector 5 is photoelectrically converted into an out...

Embodiment 2

[0040] Embodiment 2 of the present invention provides a method for generating a Rydberg atomic phase noise spectrum capable of measuring microwaves, comprising the following steps:

[0041] S1. Make the probe light incident on the atomic gas cell, and the coupled light undergoes phase modulation by an electro-optic phase modulator to increase the phase noise, and then coincides with the probe light in reverse and enters the atomic gas cell; the frequency of the probe light and the frequency of the coupled light satisfy Step-type electromagnetic induction transparent spectral conditions;

[0042] S2. Locking the detection light, and scanning the frequency of the coupling light;

[0043] S3, receiving the detection light through the detector 5 for photoelectric conversion, and sending the output electrical signal to the spectrum analyzer 6;

[0044] S4. Analyzing the Rydberg atomic phase noise spectrum at the phase modulation frequency by the spectrum analyzer 6 .

[0045] 7. ...

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Abstract

The invention relates to the field of laser spectrum and the field of quantum optics, in particular to a Rydberg atom phase noise spectrum generation device and method capable of measuring microwaves. In the device, detection light emitted by a detection light source enters an atomic gas chamber after passing through a first dichroic mirror, and coupling light emitted by a coupling light source is subjected to phase modulation by an electro-optic phase modulator to increase phase noise, then passes through a second dichroic mirror, is reversely overlapped with the detection light and enters the atomic gas chamber; the detection light transmitted by the atomic gas chamber enters a detector after passing through a second dichroic mirror, and the detector performs photoelectric conversion to output an electric signal to a spectrum analyzer; and the spectrum analyzer is used for analyzing the Rydberg atom phase noise spectrum at the phase modulation frequency. Through phase noise modulation of the laser system, the Rydberg spectrum can be obtained in the MHz analysis frequency band, the signal-to-noise ratio of the Rydberg atomic spectrum is improved, interference of low-frequency noise can be avoided, and quantum enhancement measurement of an electromagnetic field is allowed to be achieved through quantum light sources such as compressed light.

Description

technical field [0001] The invention relates to the fields of laser spectroscopy and quantum optics, in particular to a device and method for generating a Rydberg atomic phase noise spectrum capable of measuring microwaves. Background technique [0002] The atomic antenna based on Rydberg atoms uses lasers to regulate the atomic dipole moment. The theoretical limit sensitivity of electromagnetic field measurement is 5-6 orders of magnitude higher than that of existing large-scale radars. The frequency of electromagnetic waves measured covers MHz-THz, and can be traced to absolute frequency standards. With the characteristics of high sensitivity, high speed, and multiple frequency points, it has the potential to replace the antenna system of the next generation of radar or satellite. [0003] Rydberg atoms realize EIT or AT spectrum through ladder-type energy level structure, and realize microwave sensing through characteristics such as spectrum splitting. Using high-frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50G01R29/08H04B10/548H04B10/70
CPCH04B10/548H04B10/70H04B10/503G01R29/0871
Inventor 何军刘强牛琦琦王军民
Owner SHANXI UNIV
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