A simultaneous multi-band superheterodyne receiver based on Rydberg atoms

Abstract

The invention proposes a simultaneous multi-band superheterodyne receiver based on Rydberg atoms, which relates to the technical field of microwave electric field measurement. The detection light provided by a detection light laser and the coupling light provided by a coupling light laser enter the alkali metal atom gas chamber in opposite directions. Microwave signal sources of multiple bands each generate two signals. One microwave signal is emitted into space through a local oscillator microwave electric field transmitting horn of each band, and a corresponding echo signal is received by a microwave electric field receiving horn of each band. The microwave electric field transmitting horns after mixing of each band simultaneously irradiate the alkali metal atom gas chamber, and microwave fields of multiple bands are sequentially coupled to multiple pairs of adjacent Rydberg states, and superheterodyne reception is performed on microwaves of multiple bands at the same time. Superheterodyne and high-sensitivity detection of microwave signals of multiple bands can be realized.

Description

Technical Field

[0001] The invention proposes a simultaneous multi-band superheterodyne receiver based on Rydberg atoms, and relates to the technical field of microwave electric field measurement. Background Art

[0002] In the field of quantum precision measurement, microwave electric field measurement technology based on electromagnetically induced transparency (EIT) of Rydberg atoms has developed rapidly. EIT refers to the phenomenon that after adding coupling light that resonates with the transition from excited state to Rydberg state, the detection light that resonates with the transition from ground state to excited state changes from the state originally absorbed by the atom to the state of transmission. It is a quantum interference effect, which is essentially formed by the existence of dark state eigenstates. In order to minimize the impact of the Doppler effect, two light beams are generally required to propagate in opposite directions. By locking one of the two light beams to the resonant frequency of the corresponding transition and scanning the frequency of the other light beam, the EIT transmission peak can be seen. When a microwave electric field resonating with the transitions of the first Rydberg state and the second Rydberg state is applied to the atom, two dark eigenstates are formed under microwave decoration, and the original EIT transmission peak is split into two symmetrical peaks. This phenomenon is called AT splitting (Autler-Townessplitting). The splitting distance between the two peaks is related to the Rabi frequency of the microwave electric field. If there is detuning in the microwave electric field, the splitting distance is also related to the detuning of the microwave electric field relative to the microwave transition. , D is the correction factor introduced by considering the Doppler mismatch of the thermal atom system. For the scanning coupling light, it is 1; for the scanning detection light, it is The electric field strength can be calculated based on the Rabi frequency definition. , is the matrix element of the Rydberg transition.

[0003] In recent years, several research teams have proposed solutions to use Rydberg atoms to achieve high-sensitivity microwave electric field measurements: Matthew T. Simons et al. from the University of Colorado proposed using a Rydberg atomic gas chamber as an atomic mixer to convert a 20GHz RF electric field into an intermediate frequency signal of the KHz order to measure the RF electric field phase; Jing Mingyong et al. from Shanxi University used Rydberg atomic sensors to achieve superheterodyne detection, significantly improving the sensitivity of electric field strength measurement; Cox et al. from the University of Maryland achieved continuous detection of DC to 20GHz signals, with high intrinsic sensitivity and instantaneous bandwidth. However, the above technologies do not perform superheterodyne detection of microwave signals in multiple bands at the same time. Modern multi-band radar systems require synchronous reception and detection of radar signals in multiple bands, such as S-band radar for tracking and X-band radar for fire control. Therefore, a receiver that can cover multiple bands simultaneously is needed. Summary of the invention

[0004] The present invention provides a simultaneous multi-band superheterodyne receiver based on Rydberg atoms, comprising: a detection light laser, a coupling light laser, an alkali metal atom gas chamber, a microwave signal source of multiple bands, a microwave electric field receiving horn of multiple bands, a local oscillator microwave electric field transmitting horn of multiple bands, a microwave electric field transmitting horn after mixing of multiple bands and a combiner of multiple bands;

[0005] The detection light provided by the detection light laser and the coupling light provided by the coupling light laser enter the alkali metal atom gas chamber in opposite directions;

[0006] The microwave signal sources of multiple bands all generate two signals. One microwave signal is emitted into space through the local oscillator microwave electric field transmitting horn of each band, and the corresponding echo signal is received by the microwave electric field receiving horn of each band, and mixed with the local oscillator microwave through the combiner of each band, and then irradiated onto the alkali metal atomic gas chamber by the mixed microwave electric field transmitting horn of each band at the same time. The microwave fields of multiple bands are coupled to multiple pairs of adjacent Rydberg states in sequence, and superheterodyne reception is performed on the microwaves of multiple bands at the same time.

[0007] The difference frequencies of microwave signals in multiple bands are obtained according to the signals obtained by the photoelectric detector.

[0008] Furthermore, the saturated absorption frequency locking method is used to generate an error signal to lock the detection light to the alkali metal atom. On the transition line, microwave signal sources of multiple channels provide microwave signals with adjustable power that resonate with the microwave transition between Rydberg states in the alkali metal atomic gas chamber. The EIT frequency locking module generates an error signal based on the EIT transmission peak obtained by the photodetector to lock the coupled light at Jump online.

[0009] Furthermore, the detection light is divided into three paths after passing through the two-pole half-wave plate and the polarization beam splitter. The first path is used to build a saturated absorption frequency-locked optical path to generate an error signal, and feedback control is used to lock the detection light frequency at The second path is used to build the EIT frequency-locked optical path, and the third path is used to build the EIT-AT experimental optical path.

[0010] Furthermore, the coupled light is divided into two paths after passing through a bipolar half-wave plate and a polarization beam splitter. The first path is used to build an EIT frequency-locked optical path to generate an error signal, and feedback control is used to lock the frequency of the coupled light at In the transition, the second path is used to build the EIT-AT experimental optical path.

[0011] Furthermore, in the EIT frequency-locked optical path, the detection light is divided into two paths of light with mutually perpendicular polarizations, one of which coincides with the coupling light in the opposite direction and passes through the alkali metal atom gas chamber, and the other passes through the alkali metal atom gas chamber in parallel with the coupling light. The two beams of detection light pass through the dichroic mirror and the reflector and are respectively irradiated to the two input ports of the balanced photodetector for differential amplification measurement.

[0012] Furthermore, the alkali metal atom is a rubidium 87 atom, and the EIT energy level is , the input local oscillator microwave field frequency is respectively related to the transition , or Resonance.

[0013] Furthermore, the detection light laser is an external cavity semiconductor diode laser, and the coupling light laser is a semiconductor laser diode amplified frequency-doubling laser.

[0014] Furthermore, the polarizations of the detection light and the coupling light are parallel to each other, both are V polarizations, and the polarization of the microwave is adjusted to be parallel to the polarizations of the detection light and the coupling light.

[0015] Furthermore, the incident light intensities of the detection light field and the coupling light field are adjusted to satisfy the following condition: coupling light field power>>detection light field power.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The present invention provides a simultaneous multi-band superheterodyne microwave detection method based on Rydberg atoms. Rydberg atoms have rich energy levels, and the energy of transitions between adjacent Rydberg states is in the microwave to terahertz band. Therefore, by using microwave signals of multiple bands to couple to different Rydberg states respectively, superheterodyne and high-sensitivity detection of microwave signals of multiple bands can be achieved.

[0018] The present invention utilizes the rich energy level characteristics of Rydberg atoms and the energy of transitions between adjacent Rydberg states in the microwave to terahertz band. By utilizing microwave signals of multiple bands to couple to different Rydberg states respectively, simultaneous superheterodyne detection of microwave signals of multiple bands can be achieved. It is suitable for multi-band radar systems and meets the needs of modern radar systems for synchronous reception of multi-band signals. It can be applied to microwave measurement, radar signal processing, electronic countermeasures and other fields.

[0019] The balanced photodetector design eliminates common-mode noise and improves the signal-to-noise ratio of signal detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the energy level structure of a simultaneous multi-band superheterodyne receiver based on Rydberg atoms is shown;

[0022] Figure 2 The optical and microwave structure schematic diagram of the multi-band superheterodyne receiver of the present invention is shown;

[0023] Figure 3 A schematic diagram of a six-level structure in a preferred embodiment of the present invention is shown;

[0024] Figure 4 The optical path and microwave structure schematic diagram of the dual-band superheterodyne receiver of the present invention is shown. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] In the drawings of the specific embodiments of the present invention, in order to better and more clearly describe the working principles of the various components in the system, the connection relationship of the various parts in the device is shown, which only clearly distinguishes the relative position relationship between the various components, and cannot constitute a limitation on the signal transmission direction, connection sequence and structural size, size and shape of each part within the component or structure.

[0027] The present invention proposes a simultaneous multi-band superheterodyne microwave detection method based on Rydberg atoms, which utilizes microwaves of multiple bands to sequentially couple the first second Rydberg state, the second third Rydberg state, ..., thereby realizing superheterodyne detection of microwave signals of multiple bands.

[0028] Specifically, under near-resonance and weak coupling conditions, the rotation wave approximation is performed. By transforming the system Hamiltonian into a rotational representation and solving the Lindblad master equation with decoherence terms, the eigenstates and eigenenergy of the multi-level system can be obtained. Similar to the principle of AT splitting when a single-band microwave field is applied, after applying a multi-band microwave field to atoms, due to the simultaneous coupling of multiple microwaves to multiple Rydberg transitions, different dark eigenstates will eventually be formed under the decoration effect, corresponding to different splitting peaks. Taking the simultaneous two-band superheterodyne microwave detection process of continuously coupling two Rydberg transitions as an example, the local oscillator microwaves of the two bands resonate with the transitions between the corresponding Rydberg states respectively, and it can be concluded that the EIT transmission peak is split into three peaks, among which the first microwave Rabi frequency is related to the distance between the left and right peaks, similar to AT splitting; the second microwave Rabi frequency is highly correlated with the middle peak, and the local oscillator field and signal field of the microwaves of the two bands are simultaneously irradiated onto the Rydberg atoms, using the atoms as mixers, and the light signals received by the photodetector are subjected to spectrum analysis to obtain the difference frequency signals of the two bands, thereby realizing simultaneous superheterodyne detection of the two bands. The principle is similar for simultaneous superheterodyne detection of more bands.

[0029] The simultaneous multi-band superheterodyne receiver based on Rydberg atoms adopted by the present invention utilizes multiple Rydberg energy levels to realize simultaneous multi-band superheterodyne microwave precision measurement.

[0030] The components in a multi-band superheterodyne receiver include:

[0031] Probe light laser, coupled light laser, alkali metal atomic vapor chamber, signal sources of various bands, microwave electric field receiving horns of various bands of signals to be measured, microwave electric field transmitting horns of various bands of local oscillator, combiners of various bands, microwave electric field transmitting horns of various bands after mixing, high reflectivity mirrors (HR) for various lasers, polarization beam splitters (PBS) for various lasers, beam splitters (BS), half-wave plates (HWP) for various lasers, quarter-wave plates (QWP), high transmittance lenses (L) for various lasers, dichroic mirrors (DM) for detection light transmission and coupled light reflection, avalanche photodetectors (APD), balanced photodetectors (PDB), beam splitters (BD), beam collectors, oscilloscopes, and spectrum analyzers.

[0032] Alkali metal atomic vapor cell is used as an electric field sensor. The energy level structure diagram is shown in Figure 1 As shown, They are the transition frequencies from the ground state to the intermediate excited state, from the intermediate excited state to the first Rydberg state, from the first Rydberg state to the second Rydberg state, from the second Rydberg state to the third Rydberg state, and from the third Rydberg state to the fourth Rydberg state; are the detuning of the corresponding laser or microwave frequency and the corresponding transition frequency, respectively; are the Rabi frequencies corresponding to laser or microwave, respectively; are the spontaneous emission rates corresponding to the intermediate excited state, the first Rydberg state, the second Rydberg state and the third Rydberg state, respectively.

[0033] The EIT excitation energy level scheme utilized is: , the atoms in the ground state are excited to the Rydberg state, where the two lasers have wavelengths of The detection light with wavelength is The coupled light; the input multiple local oscillator microwave field frequencies are , respectively, and transition Resonance, the signal microwave field frequency has a small detuning (frequency difference of the order of kHz) from the corresponding local oscillator microwave field frequency.

[0034] Figure 1 The energy level structure is a four-level EIT-AT system. On this basis, the third, fourth, ... Rydberg states can form a multi-level system. If the orbital angular momentum of the previous Rydberg state is S, then the orbital angular momentum of the next Rydberg state can only be P. Otherwise, the next orbital angular momentum can be the previous orbital angular momentum plus one or minus one. The above experimental steps are all carried out at room temperature.

[0035] The optical and microwave structures of multi-band superheterodyne receivers are as follows Figure 2 As shown, the external cavity semiconductor diode laser (ECDL) used as the probe laser provides a wavelength of The probe light is provided by a semiconductor laser diode amplified doubled-frequency laser (DL-TA-SHG) as a coupled optical laser. The coupled light enters the alkali metal atom gas chamber in the opposite direction.

[0036] 1) The polarizations of the detection light and the coupling light are parallel to each other, both are V polarizations, and the microwave polarization is adjusted to be parallel to the laser polarization.

[0037] 2) Adjust the incident light intensity of the detection light field and the coupling light field to meet the following conditions: coupling light field power >> detection light field power;

[0038] 3) Using the saturation absorption (SAS) frequency locking method to generate an error signal, the detection light is locked to the alkali metal atom On the jump line;

[0039] 4) Scan the frequency of the coupled light laser and see the EIT transmission curve by connecting the photodetector output to an oscilloscope;

[0040] 5) The microwave signal sources of multiple channels respectively provide microwave signals that are resonant with the microwave transition between Rydberg states and have adjustable power. The phenomenon of EIT transmission peak splitting is observed by connecting the output of the photodetector to an oscilloscope, and the multiple peaks obtained by splitting are observed;

[0041] 6) Use the EIT transmission peak of the EIT frequency locking module to generate an error signal to lock the coupled light at On the jump line;

[0042] 7) The microwave signal sources of multiple bands all generate two signals. One microwave signal is emitted into the space through the corresponding speaker 1, and the corresponding echo signal is received by the corresponding speaker 2, and then mixed with the local oscillator microwave through the corresponding combiner, and irradiated onto the gas chamber through the corresponding speaker 3 at the same time. The difference frequencies of the microwaves of multiple bands can be known based on the signal obtained by the photoelectric detector connected to the spectrum analyzer.

[0043] This embodiment utilizes microwave fields of multiple bands to sequentially couple multiple pairs of adjacent Rydberg states, so that one gas chamber can be used as a sensor to simultaneously perform superheterodyne reception of microwaves of multiple bands. At the same time, since Rydberg energy levels with high principal quantum numbers are very abundant, microwaves of each band can couple at least two Rydberg microwave transitions with similar transition frequencies (the difference frequency is similar to the instantaneous bandwidth of single-band mixing), so the overall instantaneous bandwidth of the measurement can be improved.

[0044] In a preferred embodiment, a rubidium 87 atomic gas cell is used as an electric field sensor, and the specific six-level structure is as follows: Figure 3 As shown, the EIT energy level scheme used is , the atoms in the ground state are excited to the Rydberg state, where the wavelengths of the two lasers are: 780nm for detection light and 480nm for coupling light; the detection light is divided into two beams and passes through the rubidium atomic vapor chamber, the coupling light propagates in the opposite direction to one of the detection lights, and finally the two detection lights are received by the two ports of the balanced photodetector respectively for differential amplification measurement; the frequencies of the two local oscillator microwave fields input are respectively related to the transition , or Resonance, the frequencies are 14.232GHz, 24.118GHz or 24.432GHz respectively. The two detected signal microwave field frequencies are slightly detuned (frequency difference of the order of kHz) from their corresponding local oscillator microwave field frequencies.

[0045] like Figure 4 As shown in the optical path and microwave structure of the dual-band superheterodyne receiver, the external cavity semiconductor diode laser (ECDL) used as the detection light laser provides a frequency of The probe light is provided by the semiconductor laser diode amplified frequency-doubled laser (DL-TA-SHG) as the coupled optical laser. The coupled light passes through the corresponding half-wave plate, polarization beam splitter, half-wave plate, and quarter-wave plate to enter the alkali metal atom gas chamber in opposite directions. The half-wave plate in front of the polarization beam splitter is used to adjust the incident light intensity of the detection light field and the coupling light field. Before entering the gas chamber, the detection light passes through BD and is divided into two polarizations perpendicular to each other. One of the paths coincides with the coupling light in the opposite direction and passes through the gas chamber, and the other path passes through the gas chamber in parallel with the coupling light. After passing through DM and HR, they are respectively irradiated to the two input ports of PDB. The beam collector is used to collect excess stray light.

[0046] 1) The external cavity semiconductor diode laser (ECDL) provides the detection light, which is divided into three paths after passing through the two-pole HWP and PBS. The first path is used to build a saturated absorption frequency locking optical path, which is connected to the FM-Lock module (not shown) through the saturated absorption spectrum to generate an error signal, and then connected to the PID module (not shown) to lock the detection light frequency at the feedback control of the piezoelectric ceramic behind the laser grating. The frequency of the transition is The second one is used to build the EIT frequency-locked optical path, and the third one is used to build the EIT-AT experimental optical path.

[0047] 2) Provided by semiconductor laser diode amplified frequency-doubling laser (DL-TA-SHG), it is divided into two paths after passing through the two-pole HWP and PBS. The first path is used to build the EIT frequency-locking optical path, which is connected to the FM-Lock module through the EIT spectrum line to generate an error signal, and then connected to the PID module to lock the coupling light frequency at the feedback control of the piezoelectric ceramic behind the laser grating. The frequency of the transition is ,The second one is used to build the EIT-AT experimental optical path;

[0048] 3) The EIT frequency-locked optical path has the same structure as the EIT optical path in the EIT-AT experimental optical path. The detection light passes through BD (or HWP+PBS) and is divided into two paths of light with mutually perpendicular polarizations. One path coincides with the coupling light in the opposite direction and passes through the air cell, while the other path passes through the air cell in parallel with the coupling light. After passing through their respective PBSs, the two lasers on the EIT optical path pass through the half-wave plate and the quarter-wave plate in turn to adjust the polarization to the same V polarization before entering the air cell. The two detection lights pass through DM and HR and are respectively irradiated to the two input ports of PDB.

[0049] 4) First scan the coupled optical laser piezoelectric ceramic and see the EIT transmission curve by connecting the photodetector output to an oscilloscope;

[0050] 5) Then the microwave signal sources of the two bands respectively provide microwave signals that are resonant with the microwave transition between Rydberg states and have adjustable power. By connecting the output of the photodetector to an oscilloscope, the phenomenon of EIT transmission peak splitting can be observed. The three peaks obtained by splitting, the spacing between the left and right peaks is related to the Rabi frequency of the first Rydberg microwave transition, the height of the middle peak is related to the Rabi frequency of the second Rydberg microwave transition, and the relative position of the peaks is related to the detuning size of the microwave relative transition;

[0051] 6) Using the EIT transmission peak of the EIT frequency locking module to generate an error signal to lock the coupled light frequency on the aforementioned transition;

[0052] 7) The microwave signal sources of the two bands generate two signals. One microwave signal is transmitted into the space through the corresponding speaker 1, and the corresponding echo signal is received by the corresponding speaker 2. It is then mixed with the local oscillator microwave through the corresponding combiner, and irradiated onto the gas chamber through the corresponding speaker 3 at the same time. The difference frequency of the two bands of microwaves can be known based on the signal obtained by the photoelectric detector connected to the spectrum analyzer.

[0053] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A simultaneous multi-band superheterodyne receiver based on Rydberg atoms, characterized in that: include: Probe light laser, coupled light laser, alkali metal atom gas chamber, microwave signal sources of multiple bands, microwave electric field receiving horns of multiple bands, microwave electric field transmitting horns of multiple bands, microwave electric field transmitting horns after combining multiple bands, and multiple band combiners; The detection light provided by the detection light laser and the coupling light provided by the coupling light laser enter the alkali metal atom gas chamber in opposite directions; The microwave signal sources of multiple bands all generate two signals. One microwave signal is emitted into space through the local oscillator microwave electric field transmitting horns of each band, and the corresponding echo signals are received by the microwave electric field receiving horns of each band, and are combined with the local oscillator microwaves of each band through the corresponding combiner, and are simultaneously irradiated onto the alkali metal atomic gas chamber through the microwave electric field transmitting horns of each band. The microwave fields of multiple bands are sequentially coupled to multiple pairs of adjacent Rydberg states in the energy level structure, and superheterodyne reception is performed on the microwave signals of multiple bands at the same time. Obtaining the difference frequencies of the local oscillator microwaves corresponding to the microwave signals of multiple bands according to the signals obtained by the photoelectric detector; The alkali metal atom is rubidium 87 atom, and the EIT energy level is The input local oscillator microwave field frequency is respectively related to the transition , Resonance.

2. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 1, characterized in that: The error signal is generated by the saturated absorption frequency locking method to lock the probe light to the alkali metal atom. On the transition line, the EIT frequency locking module generates an error signal based on the EIT transmission peak obtained by the photodetector, locking the coupled light at On the transition line, microwave signal sources of multiple channels respectively provide microwave signals with adjustable power that are nearly resonant with the microwave transitions between the Rydberg states adjacent to the alkali metal atoms in sequence.

3. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 1, characterized in that: The detection light is divided into three paths after passing through a bipolar half-wave plate and a polarization beam splitter. The first path is used to build a saturated absorption frequency-locked optical path to generate an error signal. Feedback control locks the detection light frequency at The second path is used to build the EIT frequency-locked optical path, and the third path is used to build the EIT-AT experimental optical path.

4. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 1, characterized in that: The coupled light is divided into two paths after passing through two stages of half-wave plates and polarization beam splitters. The first path is used to build an EIT frequency-locking optical path to generate an error signal. Feedback control locks the frequency of the coupled light at In the transition, the second path is used to build the EIT-AT experimental optical path.

5. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 4, characterized in that: In the EIT frequency-locked optical path, the detection light is divided into two paths of light with mutually perpendicular polarizations, one of which overlaps with the coupling light in the opposite direction and passes through the alkali metal atom gas chamber, and the other passes through the alkali metal atom gas chamber in parallel with the coupling light. The two beams of detection light pass through the dichroic mirror and the reflector and are respectively irradiated to the two input ports of the balanced photodetector for differential amplification measurement.

6. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 1, characterized in that: The detection light laser is an external cavity semiconductor diode laser, and the coupling light laser is a semiconductor laser diode amplification and frequency doubling laser.

7. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 1, characterized in that: The polarizations of the detection light and the coupling light are parallel to each other, both are V polarizations, and the polarization of the microwave is adjusted to be parallel to the polarizations of the detection light and the coupling light.

8. The simultaneous multi-band superheterodyne receiver based on Rydberg atoms according to claim 1, characterized in that: Adjust the incident light intensity of the detection light field and the coupling light field to meet the following conditions: coupling light field power >> detection light field power.

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