60 results about "Rydberg state" patented technology

This invention provides an electromagnetic field detector, a system comprising the electromagnetic field detector, and a method of operating an electromagnetic field detector, the electromagnetic field detector comprising a first optical signal interface configured to receive, from one or more remote optical sources, a first optical signal; an electromagnetic field transmitter configured to transmit a local oscillator electromagnetic field generated from the first optical signal, the electromagnetic field transmitter comprising: a photocurrent generator configured to generate a photocurrent from the first optical signal; and an antenna interface configured to supply the photocurrent to an antenna to transmit the local oscillator electromagnetic field; a second optical signal interface configured to receive, from the one or more remote optical sources, a probe optical signal and a coupling optical signal; and a transmission medium configured to be excited by the probe optical signal and further excited by the coupling optical signal, wherein the probe optical signal has a probe frequency set to excite electrons of the transmission medium to a first excited state and the coupling optical signal has a coupling frequency set to excite electrons of the transmission medium to a predetermined Rydberg state so as to induce an Electromagnetic Induced Transparency, EIT, effect, wherein the transmission medium is further configured to receive a phase-modulated electromagnetic field from a remote transmitter and the local oscillator electromagnetic field such that the combination of the phase-modulated electromagnetic field and the local oscillator electromagnetic field causes a change in the probe optical signal from which a phase state of the phase-modulated electromagnetic field can be detected.

The invention provides a partial discharge detection system based on a Rydberg atom quantum coherence effect, and the system comprises an optical excitation module which is used for transmitting two-photon laser to excite hot atoms to enter a Rydberg state; the atomic gas chamber is used for accommodating hot atoms and is coupled with an electromagnetic field generated by the partial discharge signal, so that the hot atoms generate energy level response change under the action of the electromagnetic field; the detection light path module is used for detecting a change signal of light signal intensity in the atomic gas chamber and converting the change signal into an electromagnetic response characteristic of an electromagnetic field; the signal acquisition and processing module is used for receiving the electromagnetic response characteristics, demodulating and analyzing the electromagnetic response characteristics and extracting characteristic parameters of the partial discharge signals; and the control and calibration module is used for receiving the characteristic parameters of the partial discharge signal, performing calibration based on an energy level frequency shift rule of Rydberg atoms, and outputting electric field intensity subjected to quantization calibration. The system can realize high-sensitivity, anti-interference and traceable detection of weak partial discharge signals.

A quantum method includes providing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and exciting the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state. A quantum logic gate includes a first 171Yb qubit excited to a target Rydberg state and a second 171Yb qubit spatially separated from the first 171Yb qubit, wherein the second 171Yb qubit is not excited to the target Rydberg state while the first 171Yb qubit is excited to the target Rydberg state. A quantum computing system includes a chamber housing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and at least one gate laser source configured to excite the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state.

This invention discloses a noise reduction method for electromagnetic measurements of Rydberg atoms. This method constructs a 509nm coupled optical closed-loop circulation system comprising a polarization beam splitter, a half-wave plate, and a high-reflection mirror. This enables multiple reciprocating propagations of the laser within the atomic gas chamber. Utilizing the optical path circulation mechanism, the coupling strength between light and atoms is significantly improved without increasing the laser source power, thus greatly enhancing the excitation efficiency of Rydberg states. Simultaneously, this structure allows the intermediate frequency carrier signal to linearly and coherently superimpose with the number of cycles, while the laser background noise accumulates incoherently only according to a square root law, thereby significantly improving the measurement signal-to-noise ratio. This invention solves the problems of low excitation efficiency and difficulty in eliminating laser background noise in existing single-path optical systems, providing a new solution with high excitation efficiency and high signal-to-noise ratio for high-sensitivity microwave electric field measurements.

The invention provides a high-precision microwave electric field intensity measurement system and method based on CTC phase change, and belongs to the technical field of microwave measurement. Comprising a quantum sensing unit, an optical excitation and detection module, a microwave regulation and scanning module, an auxiliary radio frequency field module and a signal processing and control center. The method comprises the following steps: S1, preliminary preparation of Rydberg-state atoms; s2, preparing CTC phase atoms; s3, identifying a phase change critical point; and S4, measuring and calculating microwave electric field intensity measurement sensitivity improvement at the phase change critical point. According to the invention, a Rideburg system is prepared to a CTC phase change critical point area which is extremely sensitive to electric field intensity change response, and high-precision measurement of microwave electric field intensity is completed by using the extremely high gain of the system to an electric field intensity change signal at the moment.

The present disclosure relates to an apparatus and method for quantum computing using a plurality of neutral atoms in an optical trap array wherein a first internal state of the neutral atoms is used as a qubit ground state 0gt; the second internal state is used as a quantum bit excitation state 1gt; . According to the present disclosure, a local single qubit gate operation can be performed on a qubit, comprising locally and selectively irradiating with a qubit addressing laser at a first qubit addressing laser frequency, which is prepared as a qubit ground state 0gt; and a quantum bit excited state 1gt; a superposition state sgt; the quantum bit is used for causing a quantum bit ground state 0gt; and a quantum bit excited state 1gt; and the differential stark displacement is realized. Furthermore, a local dual qubit gate operation may be performed on the pair of qubits, including locally and selectively irradiating with a qubit addressing laser at a second qubit addressing laser frequency prepared as a qubit ground state 0gt; a pair of qubits for a third internal state cgt, preferably via neutral atoms; coupling the quantum bit pair to a Rydberg state rgt of a neutral atom; a third internal state cgt; the method can be used as a quantum bit ground state 0gt; a Rydberg state rgt is obtained; and the intermediate state of two-photon transition is realized.

A quantum method includes providing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and exciting the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state. A quantum logic gate includes a first 171Yb qubit excited to a target Rydberg state and a second 171Yb qubit spatially separated from the first 171Yb qubit, wherein the second 171Yb qubit is not excited to the target Rydberg state while the first 171Yb qubit is excited to the target Rydberg state. A quantum computing system includes a chamber housing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and at least one gate laser source configured to excite the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state.

A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.

The application discloses a Rydberg atom electric field sensing device and system, and is applied to the field of quantum sensing.The device comprises an atom chamber, a first distributed feedback laser and a second distributed feedback laser.The first distributed feedback laser and the second distributed feedback laser each comprise a laser source resonant cavity formed inside.The first distributed feedback laser and the second distributed feedback laser generate laser based on optical feedback and optical amplification of the laser source resonant cavity inside each of them, and the laser is used as probe light and pump light respectively, and enters from one side of the atom chamber, so that the atoms in the atom chamber reach the excited state and the Rydberg state in turn.The application uses the distributed feedback laser as the pump light and the probe light for exciting the Rydberg atom, provides a miniaturized light source for the Rydberg atom electric field sensing device, improves the integration of the device, has the advantages of miniaturization, is easy to move, is suitable for a harsh outdoor environment, and can realize large-scale integration of chips.

Material comprising atoms in Rydberg states magnetized via Inverse Faraday Effect having a magnitude of the effective magnetic field that scales substantially as the principal quantum number n raised to the power of 4 and method for magnetizing the material thereof, an atom-based quantum computing processor comprising a quantum platform populated with atomic quantum carriers configured to define qubits that are material as previously described and method for actuating the atom- based quantum computing processor thereof.

The present invention discloses a method for obtaining a pulsed Rydberg atomic spectrum based on a nanosecond pulse laser, comprising two laser beams provided by two lasers, an atomic gas chamber and a detector. The laser outputs lasers as coupling light and detection light respectively, which are respectively transmitted in opposite directions through the atomic gas chamber via a wave plate and a polarization beam splitter prism in a collinear manner, and the emitted detection light is used for detection. The experimental scheme is based on the step-type energy level structure of the Rydberg atom and a nanosecond pulse laser system to realize the Rydberg state excitation of atoms in a controllable velocity group, and to realize the detection of quantum states of Rydberg atoms in different velocity groups through electromagnetically induced transparent spectroscopy. The atomic comb spectrum developed based on this can regulate the population of Rydberg state atoms, and provide a spectral technology for the measurement of electric and magnetic fields based on atomic systems.

To improve EM sensing, detection, measurement, imaging, reception, communication, and source generation by extending capabilities beyond those achievable with conventional sensor technologies and using atom-based quantum sensor technologies.SOLUTION: A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and adjusting characteristics of the applied one or more signal processing functions based at least in part on a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum state space interferometry includes an atomic receiver, an interference path, and a detector. The interferometer includes an atomic vapor having a first atomic state and a second atomic state. The interference path from an RF phase between the first and second atomic states is closed by a quantum state space. The detector is configured to detect a readout of an interference signal.SELECTED DRAWING: Figure 1

The invention provides a broadband frequency hopping device based on high-orbital angular momentum Rydberg atoms. An atomic air chamber comprises the high-orbital angular momentum Rydberg atoms; the first reflecting mirror and the second reflecting mirror are respectively used for reflecting the detection light and the coupling light to the atom gas chamber so as to excite high-orbital angular momentum Rydberg atoms from a ground state to an excited state and pump the high-orbital angular momentum Rydberg atoms to a first Rydberg state; the first microwave generator, the second microwave generator and the third microwave generator are used for enabling high-orbital angular momentum Rydberg atoms to be transited to a second Rydberg state, a third Rydberg state and a fourth Rydberg state respectively; and the photoelectric detector is used for receiving the detection light passing through the atomic gas chamber. According to the invention, frequency hopping crossing 6 octaves can be realized, the frequency hopping speed is 60khops / s, and the frequency hopping point number is expanded under the limited instantaneous bandwidth by using the microwave frequency comb. The method has potential application value in the field of secret radio communication.

The invention relates to a tunable laser frequency stabilization system and method based on Rydberg atom direct current stark, and belongs to the technical field of laser frequency stabilization. The tuned frequency is determined by the atomic state and the voltage at the two ends of the polar plate and can be calculated through a theoretical model, the locked laser frequency has high precision and long-term stability, and the precision and the long-term stability are within MHz. In the invention, the atomic gas chamber with the built-in electrode plate is adopted to avoid the problem that a traditional gas chamber can shield a direct-current electric field, a direct-current electric field can be generated in the atomic gas chamber by applying a voltage to the two ends of the electrode plate, and an atomic energy level moves due to a direct-current stark effect, so that the tuning of the frequency of the coupled laser can be completed; the applied voltage is generally below 10V, the tuning range is between GHz and dozens of GHz according to different selected Rydberg states, and the operation is relatively convenient and simple.

The application provides a triple magic optical trap method and device for Rydberg atom quantum computing, and relates to the technical field of quantum computing. The method comprises the following steps: measuring the change relationship between an atomic ground state and a transition resonance frequency with a bias magnetic field at several different trap depths, and determining a magic magnetic field strength; measuring the change relationship between the atomic ground state and the transition resonance frequency with a dipole optical trap wavelength under the condition of the optical trap, and comparing the change relationship with the case without a magnetic field, and determining a magic wavelength; under the conditions of the magic magnetic field and the magic wavelength, a circularly polarized dipole optical trap is turned on, so that the trapping potentials of and are the same. In the operation of a double-bit gate and other operations related to the Rydberg state, the optical trap is always kept on, atomic escape is effectively avoided, the double coherence of the ground state-ground state and the ground state-Rydberg state is maintained, and the optical structure is simple.

In one example, a sensor comprising a vapor cell including a vapor of alkali atoms is disclosed. The sensor further comprises a system configured to direct electromagnetic (EM) radiation of one or more frequencies into the vapor cell and incident on the vapor of alkali atoms. The EM radiation of one or more frequencies is configured to prepare the alkali atoms from a first quantum state to a Rydberg state. The alkali atoms prepared in the Rydberg state comprise an orbital angular momentum quantum number that is at least the number of quanta of the one or more frequencies. The sensor further comprises a detector configured to detect a response of the alkali atoms to incident electromagnetic radiation after the alkali atoms are prepared in the Rydberg state.

This invention relates to a velocity measurement device based on the transient electromagnetic induction transparency effect. It utilizes two probe beams and two coupling beams to excite atoms in an atomic antenna to the Rydberg state. The probe beams are modulated into pulsed lasers to obtain the transient electromagnetic induction transparency signal of the Rydberg atoms. A first radio frequency signal source radiates electromagnetic waves to illuminate the target object; the reflected electromagnetic waves and the local oscillator electromagnetic waves radiated by a second radio frequency signal source simultaneously act on the Rydberg atoms at near-resonance. The velocity of the target object is measured by quantum precision measurement of the difference frequency signal generated by the interference of the two electromagnetic waves. Compared to traditional Rydberg atomic antennas, this invention's velocity measurement device based on the transient electromagnetic induction transparency effect can achieve velocity measurement of moving targets based on ultra-wideband, miniaturized quantum detection, thus expanding the functionality of Rydberg atomic antennas.

The application discloses a remote voice conversation listening method based on Rydberg atoms, which comprises the following steps: a probe light, a decoration light and a coupling light are used to cooperatively excite rubidium atoms in a rubidium atom gas chamber to a high Rydberg state, the frequency of the coupling light is scanned, an EIT spectrum is obtained, and an EIT resonance point is acquired; the frequency and power of a local microwave are adjusted, the frequency of the coupling light is scanned, and the EIT spectrum exhibits a critical state of AT splitting; the local microwave K L is used to scan the frequency of the coupling light after being reflected by a to-be-detected target to the rubidium atom gas chamber, an EIT-AT spectrum and a superposition spectrum of a vibration signal K S are acquired; the frequency of the coupling light is locked at the EIT resonance point, and the vibration signal K S is restored; and the vibration signal K S is denoised. The application further discloses a remote voice conversation listening device based on Rydberg atoms, wherein, when the device is used for listening, a vibration signal in a human voice frequency range is detected, and vibrations outside the human voice frequency are shielded. The application has a simple structure and does not need complex demodulation and filtering and amplifying links.

The invention provides a single-quantum terahertz signal detection system and method based on Rydberg atoms. Relates to the field of signal detection. The first laser is used for emitting detection laser so as to excite alkali metal atoms from a ground state to a low-energy-level state; the second laser is used for emitting coupled laser so as to excite the alkali metal atoms in the low energy level state to a first excitation state; the third laser is used for emitting Rydberg laser so as to excite the alkali metal atoms in the first excited state to the Rydberg state; the terahertz signal input port is used for receiving a terahertz signal to be detected so as to excite alkali metal atoms in a first excited state to a second excited state; and the single-photon detector is used for detecting fluorescent photons of visible light or infrared light released by the alkali metal atoms when the alkali metal atoms are in spontaneous radiation transition from the second excited state to the low-energy-level state so as to realize detection of the single-quantum terahertz signal.

A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.

This application discloses a method and apparatus for partial discharge detection based on Rydberg atoms, relating to the field of partial discharge detection technology for power equipment. This application includes an optical field adjustment module surrounding an atomic gas chamber, comprising a phase delay element, a polarization element, and a drive adjustment mechanism. The drive adjustment mechanism dynamically adjusts the rotation angles of the phase delay element and the polarization element in real time, dynamically adjusting the polarization state and relative phase of the probe light and coupling light incident on the optical field adjustment module. The probe light and coupling light, processed by the optical field adjustment module, are then injected into an atomic gas chamber filled with alkali metal atoms, causing the alkali metal atoms to transition from their ground state to the Rydberg state and couple with the pulsed electric field generated by the partial discharge of the device under test. Partial discharge characteristic parameters are obtained through photoelectric detection and calculation. The technical solution disclosed in this application can dynamically calibrate optical field parameters in real time, ensuring detection accuracy and meeting the needs of long-term online monitoring in industrial settings.

The invention discloses a microwave electric field high-sensitivity measurement method based on Rydberg atom hysteresis trajectory folding, and the method comprises the steps: preparing a high-density cold atom ensemble through a magneto-optical trap, and constructing a two-photon transition path to excite a Rydberg state; regulating and inducing quantum phase change through a microwave field to generate a hysteresis track with an intersection point; in combination with a noise suppression algorithm and a critical point tracking technology, extracting a nonlinear offset of a trajectory intersection point, and establishing a quantitative mapping relation between the nonlinear offset and the microwave field intensity; the atomic density is optimized to enhance the interaction between Rydberg atoms, and the SQL limitation is broken through. The quantum phase change critical behavior and the multi-body effect are combined, sub-nanovolt sensitivity, wide-frequency-band compatibility and high anti-interference capacity are achieved, and a new normal form is provided for high-precision microwave electric field measurement, quantum metering and basic physical research.

The present application relates to a system and method for real-time measurement of microwave polarization direction based on two local microwave electric fields, comprising two lasers, a microwave source and a microwave horn antenna, a Helmholtz coil, a rubidium atomic cell, a motorized rotating stage, a photodetector and a spectrum analyzer, the two lasers generate probe light and coupling light respectively, and the microwave horn antenna radiates microwave to the rubidium atomic cell. The probe light and the coupling light excite the atoms in the rubidium atomic cell to the Rydberg state under the influence of the microwave electric field. By measuring the transmittance change of the probe light with a frequency near the electromagnetically induced transparency resonance frequency, two beat frequency signal amplitudes of different frequencies generated by the two local microwave electric fields and the signal microwave electric field are obtained, and the real-time measurement of the polarization direction of the signal microwave electric field is realized according to the ratio of the two beat frequency signal amplitudes. By measuring the change of the beat frequency signal amplitude before and after applying a magnetic field, the angular resolution of the microwave electric field polarization direction in the range of 0 to 180 degrees is realized.

A method of detection of electromagnetic fields is provided. The method includes the steps of: providing a first beam in a first direction through a vapor cell, the first beam having a frequency ωp; providing a second beam in a second direction through the vapor cell, the second beam having a frequency ωd; providing a third beam in the second direction through the vapor cell, the third beam having a frequency Ωc; frequency stabilizing the first beam, the second beam, and the third beam to successive stepwise resonant transitions resulting in the excitation of a Rydberg state; applying symmetrical radio frequency sidebands to the third beam, the symmetrical RF sidebands with frequency spacing ωRF from Φc;coherently transferring the symmetrical RF sidebands to the first beam via a nonlinear wave mixing in the vapor cell; and determining an electromagnetic field inside the vapor cell.

The present disclosure relates to a sensor system for analyzing a spectrum of an electromagnetic, EM, signal. The system includes a vapor cell containing at least one species of atoms in a gaseous form, wherein the atoms in the vapor cell are exposed to the EM signal; at least one excitation source excites a number of atoms in the vapor cell to a Rydberg state, wherein at least a fraction of the excited atoms are ionized; a number of electrode pairs which are arranged along the vapor cell, and which generate a spatially and / or temporally varying electric field in the vapor cell; a current sense circuit detects a current between at least one of the number of electrode pairs, wherein the current is caused by ionized atoms in the vapor cell; and a processor determines spectral information of the EM signal based on the detected current.

A fault arc signal detection method and device based on Rydberg atoms belong to the technical field of power fault detection and solve the problem of how to improve the responsiveness of Rydberg atoms to fault arc signals under non-resonant conditions. The present invention adopts a two-photon cascade excitation method to transition cesium atoms from a ground state to an excited state via a Rydberg state, constructs an EIT spectrum linear model, and adjusts the Rabi frequency of the detection light by changing the detection light power so that the spectrum shows an intermediate state in the process of transition from EIT to EIA, thereby increasing the slope of the spectrum with respect to the fault arc response position, improving the responsiveness of the Rydberg atom system to the fault arc electromagnetic signal under non-resonant conditions, and significantly improving the performance of the Rydberg atom microwave sensing system. The method is applied to the detection of fault arc signals under high-voltage environments and is of great significance for reducing the risk of personal injury and property loss caused by localized discharge faults in various power facilities.

The utility model provides an electric field measuring device based on polymorphic Rydberg atoms, which comprises a sensing unit, a measuring unit and an upper computer control unit, the sensing unit comprises an atom probe, a detection light source device, a coupling light source device and a photoelectric detector, detection light and coupling light are respectively and oppositely incident to the atom probe, and the upper computer control unit is connected with the measuring unit. Atoms in the atom probe are excited from a ground state to a Rydberg state, and after initial EIT transmission peaks of detection light appear on a transmission spectrum, a photoelectric detector converts spectral signals into electric signals and outputs the electric signals to a measuring unit; the measuring unit outputs a control signal to the atomic probe and outputs EIT transmission spectrum data under different electric field intensities to the upper computer control unit, and the upper computer control unit identifies the EIT transmission spectrum data and outputs an electric field intensity result. The utility model solves the problems that the strong field measurement accuracy and the electric field resolution are insufficient, and the measurement bandwidth is difficult to be further improved.

The invention discloses an environment evaluation method, device and equipment for a Rydberg atomic electric field sensor and a medium, and relates to the technical field of computers, and the method comprises the steps: preparing a target Rydberg state in an atomic gas chamber of the Rydberg atomic electric field sensor, so as to form an electromagnetic induction transparent readout chain; on the electromagnetic induction transparent readout chain, electric field intensity observation under different interferences is carried out in parallel based on a preset field intensity inversion formula, preset physical field interference experiment configuration information and a corresponding preset interference error analysis strategy so as to determine a temperature and humidity error value, an electric field intensity error value and a magnetic field intensity error value; and determining a target environment evaluation result based on the temperature and humidity error value, the electric field intensity error value, the magnetic field intensity error value, the task spectrum weight configuration information and the engineering grading information so as to complete the inspection operation of the Rydberg atomic electric field sensor by using the target environment evaluation result. The reliability, the accuracy, the stability and the repeatability of the evaluation result can be improved.

The application provides a miniaturized cold Rydberg atom antenna device and a noise double-mode suppression method, relates to the technical field of quantum information, and vacuum compatible integrated atom source modules maintain the vacuum degree of a glass vacuum cavity through outgassing sheets and getter sheets; a low-temperature magnetic optical trap can cool atomic gas and gather the cold atomic gas into an F-P cavity; a Rydberg atom detection module can use coupling light to excite atoms to a Rydberg state, use detection light to detect information when cold Rydberg state atoms are split by EIT-AT after a microwave electric field is applied, and generate a main detection signal; an F-P cavity fluorescence suppression module can collect fluorescence emitted by cold Rydberg state atoms and generate a fluorescence noise signal; and a signal processing module can eliminate fluorescence noise based on the main detection signal and the fluorescence noise signal. Through the above mode, the problems that a Rydberg atom antenna device based on cold atoms is large in size and difficult to suppress fluorescence noise are solved, and the detection performance of the device can be improved.

The application provides a microwave detection device and method for fiber integrated Rydberg atoms, which comprises an optical excitation module, a bubble echo-wall microcavity, a microwave coupling module, a light splitting module, a signal conditioning module and a main control module; a tapered optical fiber is used to couple the near field of the combined light formed by the detection light and the coupling light into the bubble microcavity, so that the combined light field circulates and propagates in the echo-wall mode and fully interacts with the alkali metal atom vapor to excite a stable EIT spectrum; the microwave coupling module is used to converge the microwave to be detected into the bubble microcavity, and resonates with the atoms in the Rydberg state in the bubble microcavity to induce energy level splitting, so as to modulate the light field transmittance; the signal conditioning module is used to convert the transmitted light led out by the tapered optical fiber from an optical signal into an electrical signal, and extract the spectral characteristics of the microwave to be detected from the electrical signal; and the main control module is used to determine the microwave parameters of the microwave to be detected based on the spectral characteristics. The application improves the detection stability and detection sensitivity of the microwave detection device.