Laser control device based on Rydberg atoms and frequency spectrum monitoring platform

Abstract

The invention provides a laser control device based on Rydberg atoms, which comprises a core processor, a first signal acquisition and processing module, a first laser and an atomic gas chamber, the first signal acquisition and processing module comprises a first digital-to-analog converter, a second digital-to-analog converter, a first combining amplifier, a first signal conditioning circuit, a first analog-to-digital converter and a first field bus; the core processor comprises a triangular wave signal generation module, a voltage waveform data analysis module, a frequency discriminator and a PID control unit; the first digital-to-analog converter is connected with the first combining amplifier and the core processor, and the second digital-to-analog converter is connected with the first combining amplifier; the first laser is connected with the first combiner amplifier and the atomic gas chamber; the first signal conditioning circuit is connected with the atomic gas chamber and the first analog-to-digital converter; according to the invention, the technical problem of easy lock losing caused by low control precision and poor stability in the control process of the laser is solved.

Description

Technical Field

[0001] The present invention relates to the field of signal receiving equipment development, and in particular to a laser control device and a spectrum monitoring platform based on Rydberg atoms. Background Art

[0002] Rydberg atom technology utilizes the characteristics of Rydberg atoms that resonate with discrete frequency signals and have high sensitivity to signals. Two laser beams of specific wavelengths, coaxially transmitted in opposite directions, and with appropriate power interact with each other to excite the atoms in the Rydberg atomic chamber to the Rydberg state. At this time, the Rydberg atom is equivalent to a superheterodyne converter, which can convert the external signal to an intermediate frequency signal. Among them, the two laser beams of specific wavelengths are generated by a laser. When the laser emitted by the laser acts on the Rydberg atomic chamber, the wavelength of the laser is easily affected by the voltage, temperature, output power and other parameters of the laser.

[0003] At present, the first method of controlling the laser mainly adopts the method of manually adjusting the relevant parameters. By adjusting the relevant parameters, the laser wavelength of the laser is adjusted, thereby realizing the control of the laser. The manual adjustment method cannot adjust the laser wavelength of the laser in real time and accurately. The second method is to monitor and adjust the relevant parameters through an intelligent algorithm. The patent application document with application publication number CN 117335265 A discloses a control method and related device for an external cavity narrow linewidth semiconductor laser, and specifically discloses that first the first PD signal output by the laser is sampled to obtain the initial periodic waveform of the PD signal sequence; then a bias current adjustment signal and / or a triangular wave signal amplitude adjustment signal are sent to adjust the position of the initial periodic waveform to obtain the first periodic waveform of the first PD signal; a center temperature adjustment signal is sent to adjust the position of the signal maximum value of the first periodic waveform to obtain the second periodic waveform of the first PD signal; a silicon resistance adjustment signal is sent to obtain a third periodic waveform; a bias current step adjustment signal is sent, and the second PD signal output by the laser is sampled during the bias current adjustment process, and finally the laser is locked based on the sampling result. It can be seen that the existing laser control method uses a variety of control signals, such as bias current adjustment signal, triangle wave signal amplitude adjustment signal, center temperature adjustment signal, etc., to adjust the waveform of the PD signal output by the laser and achieve the expected, thereby realizing the locking of the laser output wavelength. However, the control accuracy of the above method is low and the stability is poor. At the same time, the above method needs to continuously adjust the center temperature of the laser during the laser control process, which is not suitable for working scenarios where the center temperature of the laser is constant. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a laser control device and a spectrum monitoring platform based on Rydberg atoms. By controlling the voltage input parameters of the first laser and the second laser, the laser wavelength of the laser is adjusted and locked, thereby achieving control of the laser, solving the technical problems of low control accuracy and poor stability in the control process of the laser in the prior art, which leads to easy loss of lock.

[0005] The technical solution of the present invention is as follows: A laser control device based on Rydberg atoms comprises a core processor, a first signal acquisition and processing module, a first laser and an atomic gas chamber. The first signal acquisition and processing module comprises a first digital-to-analog converter, a second digital-to-analog converter, a first combining amplifier, a first signal conditioning circuit, a first analog-to-digital converter and a first field bus.

[0006] The core processor includes a triangular wave signal generating module, a voltage waveform data analyzing module, a frequency discriminator and a PID control unit; the triangular wave signal generating module is communicatively connected to the first digital-to-analog converter via the first output terminal of the core processor, the voltage waveform data analyzing module is communicatively connected to the second digital-to-analog converter via the second output terminal of the core processor, the frequency discriminator is communicatively connected to the first analog-to-digital converter via the first input terminal of the core processor, and the PID control unit is communicatively connected to the frequency discriminator via its input terminal.

[0007] The first digital-to-analog converter is communicatively connected to the input end of the first combiner amplifier via its output end, and the second digital-to-analog converter is communicatively connected to the input end of the first combiner amplifier via its output end; the first laser is communicatively connected to the output end of the first combiner amplifier via its input end, and the first laser is communicatively connected to the input end of the atomic gas chamber via its output end; the first signal conditioning circuit is connected to the output end of the atomic gas chamber via its input end, and the first signal conditioning circuit is communicatively connected to the input end of the first analog-to-digital converter via its output end; the first analog-to-digital converter is communicatively connected to the first input end of the core processor via its output end.

[0008] A triangle wave signal generating module, used for generating a first triangle wave signal and outputting it to a first digital-to-analog converter through a first output terminal of a core processor; a first digital-to-analog converter, used for performing digital-to-analog conversion on the first triangle wave signal and outputting it to a first combining amplifier; a first combining amplifier, used for amplifying the first triangle wave signal and outputting it to a first laser; a first laser, used for generating a first laser signal according to the first triangle wave signal and outputting it to an atomic gas chamber; an atomic gas chamber, used for performing signal conversion on a first laser signal from a first laser and a fifth laser signal from a second laser and generating a first current signal, and then transmitting the first current signal to a first signal conditioning circuit; a first signal conditioning circuit, used for converting the first current signal into a first voltage signal and transmitting it to a first analog-to-digital converter; a first analog-to-digital converter, used for performing analog-to-digital conversion on the first voltage signal into first voltage waveform data and outputting it to a voltage waveform data analysis module in the core processor.

[0009] A voltage waveform data analysis module is used to perform data analysis on the first voltage waveform data to obtain the lowest peak voltage value of the falling edge waveform in the first voltage waveform data; a triangle wave signal generation module is used to generate a second triangle wave signal according to the lowest peak voltage value and its corresponding voltage scanning range, and then output it to the first digital-to-analog converter through the first output end of the core processor; a modulation signal generation module is used to generate a sinusoidal wave modulation signal and output it to the second digital-to-analog converter through the second output end of the core processor; the first digital-to-analog converter is also used to perform digital-to-analog conversion on the second triangle wave signal and output it to the first combining amplifier, and the second digital-to-analog converter is also used to perform digital-to-analog conversion on the sinusoidal wave modulation signal and output it to the first combining amplifier; the first combining amplifier is also used The second triangle wave signal and the sine wave modulation signal are superimposed to form a first adjustment signal, and the first adjustment signal is output to the first laser after signal amplification; the first laser is also used to generate a second laser signal after receiving the first adjustment signal and transmit it to the atomic gas chamber; the atomic gas chamber is also used to convert the second laser signal received from the first laser and the fifth laser signal from the second laser into a second current signal and transmit the second current signal to the first signal conditioning circuit; the first signal conditioning circuit is also used to convert the second current signal into a second voltage signal and transmit it to the first analog-to-digital converter; the first analog-to-digital converter is also used to output second voltage waveform data to the frequency discriminator after analog-to-digital conversion of the second voltage signal.

[0010] The frequency discriminator is used to perform frequency discrimination processing on the second voltage waveform data, generate frequency discrimination data and input the frequency discrimination data as an error input value to the PID control unit; the PID control unit is used to generate an offset voltage signal according to the error input value and superimpose the offset voltage signal with the second triangular wave signal to form a third triangular wave signal, and then output it to the first digital-to-analog converter through the first output end of the core processor; the first digital-to-analog converter is also used to perform digital-to-analog conversion on the third triangular wave signal and output it to the first combining amplifier; the first combining amplifier is also used to superimpose the third triangular wave signal and the sine wave modulation signal to form a second adjustment signal and amplify the signal and output the second adjustment signal to the first laser; the first laser is also used to generate a third laser signal after receiving the second adjustment signal and transmit it to the atomic gas chamber.

[0011] Furthermore, the device also includes a second signal acquisition and processing module, a second laser and a saturation absorption module, wherein the second signal acquisition and processing module includes a third digital-to-analog converter, a fourth digital-to-analog converter, a second combining amplifier, a second signal conditioning circuit, a second analog-to-digital converter and a second field bus; The triangle wave signal generation module is connected to the third digital-to-analog converter through the third output terminal of the core processor, the voltage waveform data analysis module is connected to the fourth digital-to-analog converter through the fourth output terminal of the core processor, and the frequency detector is connected to the second analog-to-digital converter through the second input terminal of the core processor; The third digital-to-analog converter is communicatively connected to the input end of the second combiner amplifier through its output end, and the fourth digital-to-analog converter is communicatively connected to the input end of the second combiner amplifier through its output end; the second laser is communicatively connected to the output end of the second combiner amplifier through its input end, and the second laser is communicatively connected to the input end of the atomic gas chamber and the input end of the saturation absorption module respectively; the second signal conditioning circuit is communicatively connected to the output end of the saturation absorption module through its input end, and the second signal conditioning circuit is communicatively connected to the input end of the second analog-to-digital converter through its output end; the second analog-to-digital converter is communicatively connected to the second input end of the core processor through its output end; A triangle wave signal generating module, used to generate a first triangle wave signal and output it to a third digital-to-analog converter through a third output terminal of the core processor; a third digital-to-analog converter, used to perform digital-to-analog conversion on the first triangle wave signal and output it to a second combiner amplifier; a second combiner amplifier, used to amplify the first triangle wave signal and output it to a second laser; a second laser, used to generate a first laser signal according to the first triangle wave signal and output it to a saturation absorption module and an atomic gas chamber; a saturation absorption module, used to perform signal conversion on the first laser signal from the second laser and generate a first current signal, and then transmit the first current signal to a second signal conditioning circuit; a second signal conditioning circuit, used to convert the first current signal into a first voltage signal and transmit it to a second analog-to-digital converter; a second analog-to-digital converter, used to perform analog-to-digital conversion on the first voltage signal into first voltage waveform data and output the data to a voltage waveform data analysis module in the core processor; The voltage waveform data analysis module is further used to perform data analysis on the first voltage waveform data to obtain the lowest peak voltage value of the falling edge waveform in the first voltage waveform data; the triangle wave signal generation module is used to generate a fourth triangle wave signal according to the lowest peak voltage value and its corresponding voltage scanning range, and then output it to the third digital-to-analog converter through the third output terminal of the core processor; the modulation signal generation module is used to generate a sinusoidal wave modulation signal and output it to the fourth digital-to-analog converter through the fourth output terminal of the core processor; the third digital-to-analog converter is further used to perform digital-to-analog conversion on the fourth triangle wave signal and output it to the second combiner amplifier, and the fourth digital-to-analog converter is further used to perform digital-to-analog conversion on the sinusoidal wave modulation signal and output it to the second combiner amplifier; the second The combiner amplifier is further used for superimposing the fourth triangle wave signal and the sine wave modulation signal to form a third adjustment signal, amplifying the signal and outputting the third adjustment signal to the second laser; the second laser is further used for generating a fourth laser signal after receiving the third adjustment signal and transmitting the signal to the saturation absorption module and the atomic gas chamber; the saturation absorption module is further used for converting the fourth laser signal into a third current signal and transmitting the third current signal to the second signal conditioning circuit; the second signal conditioning circuit is further used for converting the third current signal into a third voltage signal and transmitting the third voltage signal to the second analog-to-digital converter; the second analog-to-digital converter is further used for performing analog-to-digital conversion on the third voltage signal and outputting the third voltage waveform data to the frequency discriminator; The frequency discriminator is used to perform frequency discrimination processing on the third voltage waveform data, generate frequency discrimination data and input the frequency discrimination data as an error input value to the PID control unit; the PID control unit is used to generate an offset voltage signal according to the error input value and superimpose the offset voltage signal with the fourth triangular wave signal to form a fifth triangular wave signal, and then output it to the third digital-to-analog converter through the third output end of the core processor; the third digital-to-analog converter is also used to perform digital-to-analog conversion on the fifth triangular wave signal and output it to the second combining amplifier; the second combining amplifier is also used to superimpose the fifth triangular wave signal and the sine wave modulation signal to form a fourth adjustment signal and amplify the signal and output the fourth adjustment signal to the second laser; the second laser is also used to generate a fifth laser signal after receiving the fourth adjustment signal and transmit it to the atomic gas chamber.

[0012] Further, the voltage waveform data analysis module includes a data sampling point acquisition unit, a first data processing unit communicatively connected to the data sampling point acquisition unit, a second data processing unit communicatively connected to the first data processing unit, and an output unit communicatively connected to the second data processing unit; A data sampling point acquisition unit is used to use the data sampling point corresponding to the maximum value of the sampled voltage in the first voltage waveform data as the starting sampling point, and acquire the data sampling point and the sampled voltage value of half a sampling period after the starting sampling point, wherein the data sampling point of half a sampling period after the starting sampling point is the falling edge waveform data sampling point in the first voltage waveform data; A first data processing unit is used to perform data XOR processing on the received first voltage waveform data to obtain at least two peak data sampling points; based on any one of the two peak data sampling points, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; A second data processing unit is used to step-by-step reduce the voltage value range of the first triangular wave signal based on the step voltage value, and perform data XOR processing on the received first voltage waveform data corresponding to the voltage value range until a unique peak data sampling point is obtained, and the unique peak data sampling point is the lowest peak data sampling point in the falling edge waveform; wherein, based on the unique peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; The output unit is used to output the voltage value of the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it.

[0013] Further, the data sampling point acquisition unit includes a voltage waveform data acquisition subunit, a first calculation subunit communicatively connected to the voltage waveform data acquisition subunit, and an acquisition subunit communicatively connected to the calculation subunit; A voltage waveform data acquisition subunit, used to acquire first voltage waveform data, wherein the first voltage waveform data includes voltage data sampling points, the number of voltage data sampling points, and a triangular wave voltage value range corresponding to the voltage data sampling points; The first calculation subunit is used to calculate the product of the difference between the maximum value of the voltage value range of the triangular wave signal and the voltage value of the starting sampling point and the voltage coefficient, so as to obtain the position information of the voltage data sampling point corresponding to the maximum value of the triangular wave voltage value range; wherein, half of the number of the voltage data sampling points is divided by the maximum value of the voltage value range of the triangular wave signal to obtain the voltage coefficient between the voltage data sampling point and the voltage value corresponding to it; The acquisition subunit is used to take the voltage data sampling point corresponding to the maximum value of the triangle wave voltage value range as the starting sampling point, obtain the voltage data sampling points and their sampled voltage values ​​of half the number of voltage data sampling points after the starting sampling point, and obtain the falling edge waveform data of half a sampling period.

[0014] Further, the first data processing unit includes a second computing subunit, a first judging subunit communicatively connected to the second computing subunit, and a first data processing subunit communicatively connected to the judging subunit; A second calculation subunit is used to calculate the average value of the sampled voltage of the falling edge waveform data according to the maximum value and the minimum value of the sampled voltage in the acquired falling edge waveform data; A first judgment subunit is used to take data sampling points in the falling edge waveform data where the sampling voltage value is greater than or equal to the sampling voltage average value as a first sampling point set, and take data sampling points in the falling edge waveform data where the sampling voltage value is less than the sampling voltage average value as a second sampling point set; The first data processing sub-unit is used to perform exclusive OR operations on the data sampling points in the first sampling point set and the second sampling point set according to the sampling time, so as to obtain at least two peak data sampling points, thereby determining that there is a complete pit-shaped band in the falling edge waveform; wherein, based on the peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value.

[0015] Furthermore, the second data processing unit includes: The second data processing subunit performs smoothing filtering and extraction on the acquired data sampling points of the falling edge waveform data, and then performs derivative processing, and takes the sampling voltage values ​​corresponding to the data sampling points greater than 0 as the third sampling point set, and the sampling voltage values ​​corresponding to the data sampling points less than 0 as the fourth sampling point set; The third data processing subunit performs an exclusive OR operation on the data sampling points in the third sampling point set and the fourth sampling point set according to the sampling time to obtain a single or more peak data sampling points; wherein, based on the peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; The second judgment subunit is used to confirm that the only peak voltage data sampling point is the lowest peak data sampling point in the falling edge waveform when only one peak voltage data sampling point is obtained, and output the sampling voltage value corresponding to the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it; when more than one peak voltage data sampling point is obtained, the voltage value range of the first triangular wave signal is narrowed based on the step voltage value, and the above steps are repeated until the only peak voltage data sampling point is obtained, and then the only peak voltage data sampling point is confirmed to be the lowest peak data sampling point in the falling edge waveform, and the sampling voltage value corresponding to the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it are output.

[0016] The present invention also provides a spectrum monitoring platform, including a laser control device based on Rydberg atoms.

[0017] The present invention, on the basis of the constant working temperature and output power of the second laser, firstly sends the first triangular wave signal to the second laser through the core processor, the second laser outputs the first laser signal to the saturation absorption module and the atomic gas chamber, the saturation absorption module converts the first laser signal into a current signal and outputs the first voltage waveform data to the core processor; then the core processor performs data analysis on the first voltage waveform data, obtains the lowest peak voltage value of the falling edge waveform in the first voltage waveform data, forms a third adjustment signal and outputs it to the second laser; the second laser outputs a fourth laser signal to the saturation absorption module, the saturation absorption module outputs the third voltage waveform data to the core processor; finally, the core processor outputs the fourth adjustment signal through the second signal acquisition processing module and outputs it to the second laser, thereby ensuring that the second laser outputs a fifth laser signal with a fixed wavelength to the saturation absorption module and the atomic gas chamber, realizing wavelength locking of the second laser and ensuring the real-time dynamic of the second laser. Control; similarly, on the basis of the constant operating temperature and output power of the first laser, the present invention first outputs the first laser signal to the atomic gas chamber through the first laser, and the atomic gas chamber converts the first laser signal and the fifth laser signal into a current signal and outputs the first voltage waveform data to the core processor; then the core processor performs data analysis on the first voltage waveform data, obtains the lowest peak voltage value of the falling edge waveform in the first voltage waveform data, forms a first adjustment signal and outputs it to the first laser, the first laser outputs the second laser signal to the atomic gas chamber, and the atomic gas chamber receives the second laser signal and the third laser signal and converts them into a current signal and outputs the second voltage waveform data to the core processor; finally, the core processor outputs the second adjustment signal through the first signal acquisition and processing module and outputs it to the first laser, thereby ensuring that the first laser outputs the third laser signal with a fixed wavelength to the atomic gas chamber, realizing wavelength locking of the first laser and ensuring real-time dynamic control of the first laser.

[0018] The present invention performs frequency discrimination processing on the second voltage waveform data through the frequency discriminator in the core processor, and then inputs the frequency discrimination data as an error input value into the PID control unit therein, and the offset voltage signal generated by the PID control unit is superimposed with the second triangular wave signal to form a third triangular wave signal, which is then output to the first signal acquisition and processing module through its first output end, and the first signal acquisition and processing module performs signal superposition on the third triangular wave signal and the sine wave modulation signal to form a second adjustment signal, thereby improving the stability of the wavelength output after quickly completing the locking of the output laser wavelength of the first laser; similarly, the frequency discrimination data after the third voltage waveform data is frequency discriminated by the core processor is input as an error input value into the PID control unit therein, and the offset voltage signal generated by the PID control unit is superimposed with the fourth triangular wave signal to form a fifth triangular wave signal, which is then output to the second signal acquisition and processing module, and the second signal acquisition and processing module performs signal superposition on the fifth triangular wave signal and the sine wave modulation signal to form a fourth adjustment signal, thereby improving the stability of the wavelength locking after quickly completing the locking of the output laser wavelength of the second laser.

[0019] The present invention first obtains the lowest peak voltage value of the first voltage waveform data and the voltage value range of the first triangular wave voltage signal through a voltage waveform data analysis module, and superimposes a second triangular wave signal whose maximum voltage value and minimum voltage value are both set to the lowest peak voltage value with a sine wave modulation signal to form a first adjustment signal to adjust and control the waveform of the laser output by the first laser, thereby achieving preliminary locking of the output wavelength of the first laser; then, the second voltage waveform data is discriminated by a frequency discriminator, and the offset voltage signal output by a PID control unit is superimposed with the second triangular wave signal to form a third triangular wave signal, and the third triangular wave signal is superimposed with the sine wave signal to form a second adjustment signal to adjust and control the waveform of the laser output by the first laser, thereby achieving final locking of the output wavelength of the first laser; and In principle, the present invention first obtains the lowest peak voltage value of the first voltage waveform data and the voltage value range of the first triangular wave voltage signal through a voltage waveform data analysis module, and superimposes a fourth triangular wave signal whose maximum voltage value and minimum voltage value are both set to the lowest peak voltage value with a sine wave modulation signal to form a third adjustment signal to adjust and control the waveform of the laser output by the second laser, thereby achieving preliminary locking of the output wavelength of the second laser; then, the third voltage waveform data is discriminated by a frequency discriminator, and the offset voltage signal output by the PID control unit is superimposed with the fourth triangular wave signal to form a fifth triangular wave signal, and the fifth triangular wave signal is superimposed with the sine wave signal to form a fourth adjustment signal to adjust and control the waveform of the laser output by the second laser, thereby achieving final locking of the output wavelength of the second laser.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention first obtains the data sampling point of half a sampling period after the starting sampling point through the core processor, and then performs data XOR processing on the received first voltage waveform data to obtain at least two peak data sampling points. Finally, based on the step voltage value, the voltage value range of the first triangular wave signal is gradually reduced, and the received first voltage waveform data corresponding to the voltage value range is XOR processed until a unique peak data sampling point is obtained, thereby completing the data analysis of the first voltage waveform data, effectively improving the control accuracy of the first laser and the second laser, and improving the stability of the first laser and the second laser to quickly output fixed wavelength lasers.

[0021] 2. The present invention forms a first laser control loop by sequentially communicating with a core processor, a third digital-to-analog converter or a fourth digital-to-analog converter, a second laser, a saturation absorption module, a signal conditioning circuit, and a second analog-to-digital converter, and then forms a second laser control loop by sequentially communicating with a core processor, a first digital-to-analog converter or a second digital-to-analog converter, a first laser, an atomic gas chamber, a signal conditioning circuit, and a first analog-to-digital converter. Through the above two laser control loops, the wavelength locking of the laser outputs of the two lasers can be quickly completed, and the laser signals output by the two lasers to the atomic gas chamber can be controlled and adjusted in real time to ensure the stability of the laser signal output, thereby ensuring that the Rydberg atomic gas chamber performs superheterodyne frequency conversion.

[0022] 3. The present invention controls the voltage input parameters of the first laser and the second laser, adjusts the laser wavelength and locks the laser wavelength, thereby achieving control of the laser, solving the technical problem of low control accuracy and poor stability in the control process of the laser, which causes easy loss of lock.

[0023] 4. Compared with the prior art, the present invention performs data analysis on the voltage waveform data on the basis of the constant operating temperature and output power of the first laser and the second laser, and then adjusts the waveform of the output laser of the first laser and the second laser through a triangle wave signal, a sine wave modulation signal and an offset voltage signal based on the data analysis result, thereby effectively improving the control accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic structural diagram of a laser control device based on Rydberg atoms according to an embodiment of the present invention; Figure 2is a schematic diagram of a second laser control method according to an embodiment of the present invention, wherein Figure 2 a is the schematic diagram of the primary stage of controlling the second laser. Figure 2 b is the schematic diagram of the core stage of the second laser control. Figure 2 c is a schematic diagram of the final stage of the control of the second laser; Figure 3 is a schematic diagram of a first laser control method according to an embodiment of the present invention, wherein Figure 3 a is a schematic diagram of the initial stage of controlling the first laser, Figure 3 b is the schematic diagram of the core stage of the first laser control, Figure 3 c is a schematic diagram of the final stage of control of the first laser; Figure 4 A voltage waveform diagram corresponding to the first voltage waveform data described in an embodiment of the present invention; Figure 5 A voltage waveform diagram corresponding to the falling edge waveform data described in an embodiment of the present invention; Figure 6 The voltage waveform diagram corresponding to at least two peak data sampling points is found from the falling edge waveform data according to the embodiment of the present invention; Figure 7 The voltage waveform diagram corresponding to the unique peak data sampling point is found from the falling edge waveform data according to the embodiment of the present invention; Among them, ADC1-first analog-to-digital converter, DAC1-first digital-to-analog converter, DAC2-second digital-to-analog converter, ADC2-second analog-to-digital converter, DAC3-third digital-to-analog converter, DAC4-fourth digital-to-analog converter, 1-first input terminal, 2-first output terminal, 3-second input terminal, 4-first input and output terminal, 5-second input terminal, 6-third output terminal, 7-fourth output terminal, 8-second input and output terminal. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0026] As attached Figure 1As shown, a laser control device based on Rydberg atoms includes a core processor, a first signal acquisition and processing module, a first laser and an atomic gas chamber, the first signal acquisition and processing module includes a first digital-to-analog converter, a second digital-to-analog converter, a first combining amplifier, a first signal conditioning circuit, a first analog-to-digital converter and an RS422 field bus, a second signal acquisition and processing module, a second laser and a saturation absorption module, and the second signal acquisition and processing module includes a third digital-to-analog converter, a fourth digital-to-analog converter, a second combining amplifier, a second signal conditioning circuit and a second analog-to-digital converter.

[0027] The core processor includes a triangular wave signal generating module, a voltage waveform data analyzing module, a frequency discriminator and a PID control unit; the triangular wave signal generating module is connected to the first digital-to-analog converter through the first output terminal of the core processor, the voltage waveform data analyzing module is connected to the second digital-to-analog converter through the second output terminal of the core processor, the frequency discriminator is connected to the first analog-to-digital converter through the first input terminal of the core processor, and the PID control unit is connected to the frequency discriminator through its input terminal; the triangular wave signal generating module is connected to the third digital-to-analog converter through the third output terminal of the core processor, the voltage waveform data analyzing module is connected to the fourth digital-to-analog converter through the fourth output terminal of the core processor, and the frequency discriminator is connected to the second analog-to-digital converter through the second input terminal of the core processor.

[0028] The first digital-to-analog converter is communicatively connected to the input end of the first combiner amplifier via its output end, and the second digital-to-analog converter is communicatively connected to the input end of the first combiner amplifier via its output end; the first laser is communicatively connected to the output end of the first combiner amplifier via its input end, and the first laser is communicatively connected to the input end of the atomic gas chamber via its output end; the first signal conditioning circuit is connected to the output end of the atomic gas chamber via its input end, and the first signal conditioning circuit is communicatively connected to the input end of the first analog-to-digital converter via its output end; the first analog-to-digital converter is communicatively connected to the first input end of the core processor via its output end.

[0029] The third digital-to-analog converter is communicatively connected to the input end of the second combiner amplifier via its output end, and the fourth digital-to-analog converter is communicatively connected to the input end of the second combiner amplifier via its output end; the second laser is communicatively connected to the output end of the second combiner amplifier via its input end, and the second laser is communicatively connected to the input end of the atomic gas chamber and the input end of the saturated absorption module respectively; the second signal conditioning circuit is connected to the output end of the saturated absorption module via its input end, and the second signal conditioning circuit is communicatively connected to the input end of the second analog-to-digital converter via its output end; the second analog-to-digital converter is communicatively connected to the second input end of the core processor via its output end.

[0030] The control process of the laser control device in the embodiment of the present invention includes a process of controlling the first laser and the second laser, wherein Figure 2 a. Figure 2 b and Figure 2 c is a schematic diagram of the control process of the second laser, where Figure 3 a. Figure 3 b and Figure 3 c is a schematic diagram of the control process of the first laser, which is as follows: The core processor sends out a laser frequency output control signal and a temperature control signal through its first input and output terminal, and transmits them to the first laser through the RS422 communication bus. After receiving the signals, the first laser outputs a fixed frequency laser to the atomic gas chamber at a constant operating temperature.

[0031] like Figure 2 As shown in a, the triangular wave signal generating module generates a first triangular wave signal and outputs it to the third digital-to-analog converter through the third output terminal of the core processor; the third digital-to-analog converter performs digital-to-analog conversion on the first triangular wave signal and outputs it to the second combining amplifier; the second combining amplifier amplifies the first triangular wave signal and outputs it to the second laser; the second laser generates a first laser signal according to the first triangular wave signal and outputs it to the saturation absorption module and the atomic gas chamber; the saturation absorption module converts the first laser signal from the second laser and generates a first current signal, and then transmits the first current signal to the second signal conditioning circuit; the second signal conditioning circuit converts the first current signal into a first voltage signal and transmits it to the second analog-to-digital converter; the second analog-to-digital converter performs analog-to-digital conversion on the first voltage signal into first voltage waveform data and outputs the data to the voltage waveform data analysis module in the core processor.

[0032] In this embodiment, the first input and output end of the core processor is connected to the RS422 bus, and the core processor sends a control signal carrying the center temperature and output power information to the first laser and the second laser through the RS422 bus, the purpose of which is to ensure that the center temperature or operating temperature and the output power of the first laser or the second laser are in a stable state, and to control the output wavelength of the first laser or the second laser; after waiting for 10 minutes, the third output end of the core processor is communicated with the third digital-to-analog conversion module in the second signal acquisition and processing module, and the core processor outputs the first triangular wave signal through its third output end, which is amplified by the amplifier in the second signal acquisition and processing module and then output to the second laser, wherein the frequency of the first triangular wave signal is 10 Hz; after receiving the first triangular wave signal, the first laser outputs the first laser signal to the saturation absorption module.

[0033] like Figure 2b, the voltage waveform data analysis module performs data analysis on the first voltage waveform data to obtain the lowest peak voltage value of the falling edge waveform in the first voltage waveform data; the triangle wave signal generation module is used to generate a fourth triangle wave signal according to the lowest peak voltage value and its corresponding voltage scanning range, and then output it to the third digital-to-analog converter through the third output terminal of the core processor; the modulation signal generation module is used to generate a sine wave modulation signal and output it to the fourth digital-to-analog converter through the fourth output terminal of the core processor; the third digital-to-analog converter performs digital-to-analog conversion on the fourth triangle wave signal and outputs it to the second combiner amplifier, and the fourth digital-to-analog converter performs digital-to-analog conversion on the sine wave modulation signal and outputs it to the second combiner amplifier; The second combining amplifier superimposes the fourth triangle wave signal and the sine wave modulation signal to form a third adjustment signal, amplifies the signal and outputs the third adjustment signal to the second laser; after receiving the third adjustment signal, the second laser generates a fourth laser signal and transmits it to the saturation absorption module and the atomic gas chamber; the saturation absorption module converts the fourth laser signal into a third current signal and transmits the third current signal to the second signal conditioning circuit; the second signal conditioning circuit converts the third current signal into a third voltage signal and transmits it to the second analog-to-digital converter; after the second analog-to-digital converter performs analog-to-digital conversion on the third voltage signal, it outputs the third voltage waveform data to the frequency discriminator in the core processor.

[0034] The function of the saturation absorption module is to absorb light of a specific wavelength and output a new spectrum containing a saturation absorption pit, and then after photoelectric conversion, form a current signal and output it. In the embodiment of the present invention, the function of the saturation absorption module is to convert the first laser signal into a current signal after receiving the first laser signal; the current signal enters the second analog-to-digital converter for voltage signal acquisition after passing through the signal conditioning circuit in the second signal acquisition and processing module. Among them, the first signal conditioning circuit and the second signal conditioning circuit are both used to amplify the input signal and convert the input current signal into a voltage signal. It includes a two-stage operational amplifier, the first stage operational amplifier has an amplification factor of 9.8 times, an output of 0~4.9V, and a bias voltage of 100mV. It is added to the output of the first stage operational amplifier in the second stage operational amplifier, and finally outputs a voltage signal of 0~5V to ensure that it can be collected by the second analog-to-digital converter of the subsequent stage; the second analog-to-digital converter samples the voltage data and forms the first voltage waveform data, and then transmits the first voltage waveform data to the core processor.

[0035] In this embodiment, the wavelength of the laser output by the second laser is related to voltage and temperature. When the operating temperature of the second laser is constant, if the wavelength of the laser output by the second laser is to be adjusted, it is necessary to control the input voltage signal of the second laser. The core processor collects the first voltage waveform data output by the second laser in the initial stage so as to perform voltage input control on the second laser.

[0036] In this embodiment, the core processor analyzes the collected first voltage waveform data, with the purpose of obtaining the lowest peak voltage value and its corresponding voltage scanning range in the falling edge voltage waveform; the core processor generates a fourth triangular wave signal according to the lowest peak voltage value and its corresponding voltage scanning range and outputs it to the second signal acquisition and processing module through the third digital-to-analog converter, that is, in order to obtain the lowest peak voltage value, the voltage maximum value and the voltage minimum value corresponding to the first triangular wave signal are continuously shrunk to obtain the voltage scanning range after shrinkage, and finally the upper limit value and the lower limit value of the voltage scanning range are set to the lowest peak voltage value to form a fourth triangular wave signal and output it to the second signal acquisition and processing module. It can be seen that the embodiment of the present invention sets the voltage maximum value and the voltage minimum value in the voltage scanning range corresponding to the first triangular wave signal to the lowest peak voltage value through the voltage waveform data analysis module and generates and outputs the fourth triangular wave signal, and locks the output voltage of the fourth triangular wave signal to ensure that the fourth adjustment signal is stably output to the second laser, so as to achieve the second laser stable output of the fifth laser signal.

[0037] In this embodiment, the core processor generates a fourth triangular wave signal according to the minimum peak voltage value and its corresponding voltage scanning range, and outputs it to the second signal acquisition and processing module through the third digital-to-analog converter. At the same time, the core processor generates a sinusoidal wave modulation signal with a frequency of 11khz and a peak-to-peak value of 60mV, and outputs it to the second signal acquisition and processing module through the fourth digital-to-analog converter. The fourth triangular wave signal and the sinusoidal wave modulation signal are superimposed in the combiner to form a third adjustment signal, which is then amplified by the signal amplifier and output to the second laser.

[0038] like Figure 2 As shown in c, the discriminator in the core processor performs frequency discrimination processing on the third voltage waveform data, generates frequency discrimination data and inputs the frequency discrimination data as an error input value into the PID control unit in the core processor; the PID control unit generates an offset voltage signal according to the error input value and superimposes the offset voltage signal with the fourth triangular wave signal to form a fifth triangular wave signal, and then outputs it to the third digital-to-analog converter through the third output end of the core processor; the third digital-to-analog converter performs digital-to-analog conversion on the fifth triangular wave signal and outputs it to the second combiner amplifier; the second combiner amplifier superimposes the fifth triangular wave signal and the sinusoidal wave modulation signal to form a fourth adjustment signal, amplifies the signal and outputs the fourth adjustment signal to the second laser; after receiving the fourth adjustment signal, the second laser generates a fifth laser signal and transmits it to the atomic gas chamber.

[0039] The frequency discrimination processing is to multiply the data after filtering extraction and conversion by the analog-to-digital converter by a signal with the same frequency and phase as the transmitted sine wave, and the PID control unit is mainly used to obtain the frequency discrimination data, and output the offset voltage signal through the PID algorithm, and form a fifth triangular wave signal by superimposing the offset voltage signal with the fourth triangular wave signal, so as to output the fifth triangular wave signal to the second laser to achieve input voltage control of the second laser, and further control the wavelength of the output laser of the second laser. At the same time, this step is also used to keep the locked fourth triangular wave signal in a stable output state.

[0040] The core processor also sends out a laser frequency output control signal and a temperature control signal through its second input and output terminal, which are transmitted to the second laser through the RS422 communication bus. After receiving the signals, the second laser outputs a fixed frequency laser to the atomic gas chamber and the saturation absorption module at a constant operating temperature.

[0041] As attached Figure 3 As shown in a, the triangular wave signal generation module generates a first triangular wave signal and outputs it to the first digital-to-analog converter through the first output terminal of the core processor; wherein the frequency of the first triangular wave signal is 10Hz. The first digital-to-analog converter performs digital-to-analog conversion on the first triangular wave signal and outputs it to the first combining amplifier; the first combining amplifier amplifies the first triangular wave signal and outputs it to the first laser; the first laser generates a first laser signal according to the first triangular wave signal and outputs it to the atomic gas chamber; the atomic gas chamber performs signal conversion on the first laser signal from the first laser and the fifth laser signal from the second laser and generates a first current signal, and then transmits the first current signal to the first signal conditioning circuit; the first signal conditioning circuit converts the first current signal into a first voltage signal and transmits it to the first analog-to-digital converter; the first analog-to-digital converter performs analog-to-digital conversion on the first voltage signal into first voltage waveform data and outputs it to the voltage waveform data analysis module in the core processor.

[0042] The atomic gas chamber has the characteristic of resonating with discrete frequency signals and has a high sensitivity to signals. When two laser beams of specific wavelength, coaxial transmission in opposite directions and appropriate power interact with each other, the atoms in the atomic gas chamber are excited to the Rydberg state. At this time, the atomic gas chamber is equivalent to a superheterodyne converter, which realizes the frequency conversion of the external signal to the intermediate frequency signal. In this embodiment, when the first laser signal of the first laser and the fifth laser signal from the second laser act on the atomic gas chamber together, the atomic gas chamber converts the first laser signal and the fifth laser signal into current signals, the signal conditioning circuit amplifies the input current signal, and converts the input current signal into a voltage signal and outputs it to the first analog-to-digital converter, the first analog-to-digital converter samples the voltage data to form the first voltage waveform data and transmits the first voltage waveform data to the core processor.

[0043] The wavelength of the laser output by the first laser is related to voltage and temperature. When the operating temperature of the first laser is constant, if the wavelength of the laser output by the first laser is to be adjusted, the input voltage signal of the first laser needs to be controlled. Collecting the first voltage waveform data and transmitting it to the core processor is the initial stage of controlling the first laser, and its purpose is to control the voltage input of the first laser.

[0044] The wavelength of the output laser of the first laser is related to voltage and temperature. When the operating temperature of the first laser is constant, if the wavelength of the output laser of the first laser is to be adjusted, it is necessary to control the input voltage signal of the first laser. Therefore, the purpose of the above steps is that the core processor collects the first voltage waveform data output by the first laser in the initial stage so as to control the voltage input of the first laser.

[0045] As attached Figure 3 As shown in b, the voltage waveform data analysis module performs data analysis on the first voltage waveform data to obtain the lowest peak voltage value of the falling edge waveform in the first voltage waveform data; the triangle wave signal generation module is used to generate a second triangle wave signal according to the lowest peak voltage value and its corresponding voltage scanning range, and then output it to the first digital-to-analog converter through the first output end of the core processor; and generate a sinusoidal wave modulation signal and output it to the second digital-to-analog converter through the second output end of the core processor.

[0046] As attached Figure 4 As shown, the core processor analyzes the collected first voltage waveform data, the purpose of which is to obtain the voltage scanning range corresponding to the lowest peak voltage value in the falling edge voltage waveform; the voltage scanning range is the interval value of the corresponding triangular wave voltage value, such as 0V to 120V, 0V to 110V, etc. In order to obtain the lowest peak voltage value, the voltage scanning range of the first triangular wave voltage signal is generally continuously shrunk, and the voltage value range of the first triangular wave voltage signal is continuously shrunk, so that the lowest peak voltage value in the falling edge waveform can be obtained. When the lowest peak voltage value is finally obtained, the voltage scanning range of the first triangular wave signal may be 0V to 60V or 0V to 50V. After obtaining the lowest peak voltage value, the maximum voltage and the minimum voltage of the voltage scanning range of the first triangular wave signal are both set to the lowest peak voltage value, and a second triangular wave signal is generated. That is, the core processor generates a second triangular wave signal according to the voltage scanning range corresponding to the lowest peak voltage value and outputs it to the first signal acquisition processing module through the first digital-to-analog converter. At the same time, the core processor generates a sinusoidal wave modulation signal with a frequency of 11khz and a peak-to-peak value of 60mV and outputs it to the first signal acquisition and processing module through the second digital-to-analog converter. The second triangle wave signal and the sinusoidal wave modulation signal are superimposed in the combiner to form a first adjustment signal, which is then amplified by the signal amplifier and output to the first laser.

[0047] The first digital-to-analog converter performs digital-to-analog conversion on the second triangular wave signal and outputs it to the first combining amplifier, and the second digital-to-analog converter performs digital-to-analog conversion on the sine wave modulation signal and outputs it to the first combining amplifier; the first combining amplifier performs signal superposition on the second triangular wave signal and the sine wave modulation signal to form a first adjustment signal, performs signal amplification on the first adjustment signal, and outputs the first adjustment signal to the first laser; after receiving the first adjustment signal, the first laser generates a second laser signal and transmits it to the atomic gas chamber; the atomic gas chamber converts the second laser signal received from the first laser and the fifth laser signal from the second laser into a second current signal and transmits the second current signal to the first signal conditioning circuit; the first signal conditioning circuit converts the second current signal into a second voltage signal and transmits it to the first analog-to-digital converter; after the first analog-to-digital converter performs analog-to-digital conversion on the second voltage signal, it outputs second voltage waveform data to the frequency detector.

[0048] As attached Figure 3 As shown in c, the discriminator in the core processor performs frequency discrimination processing on the second voltage waveform data, generates frequency discrimination data and inputs the frequency discrimination data as an error input value to the PID control unit; the PID control unit generates an offset voltage signal according to the error input value and superimposes the offset voltage signal with the second triangular wave signal to form a third triangular wave signal, and then outputs it to the first digital-to-analog converter through the first output end of the core processor; the first digital-to-analog converter performs digital-to-analog conversion on the third triangular wave signal and outputs it to the first combining amplifier; the first combining amplifier superimposes the third triangular wave signal and the sinusoidal wave modulation signal to form a second adjustment signal, amplifies the signal, and outputs the second adjustment signal to the first laser; after receiving the second adjustment signal, the first laser generates a third laser signal and transmits it to the atomic gas chamber, thereby completing the locking of the output wavelength of the first laser.

[0049] The above process is the final stage of controlling the first laser. The frequency discrimination processing is to multiply the data after filtering and conversion by the analog-to-digital converter by a signal with the same frequency and phase as the transmitted sine wave, and the PID control unit is mainly used to obtain the frequency discrimination data, and generate an offset voltage signal through the PID algorithm, superimpose the offset voltage signal with the second triangular wave signal to form a third triangular wave signal, and then form a second adjustment signal with the sine wave modulation signal and output it to the first laser. It can be seen that the second adjustment signal is output to the second laser to achieve the input voltage control of the first laser, which can further control the wavelength of the output laser of the first laser. At the same time, this step is also used to keep the locked second triangular wave signal in a stable output state.

[0050] Preferably, the voltage waveform data analysis module includes a data sampling point acquisition unit, a first data processing unit communicatively connected to the data sampling point acquisition unit, a second data processing unit communicatively connected to the first data processing unit, and an output unit communicatively connected to the second data processing unit.

[0051] Among them, the data sampling point acquisition unit is used to use the data sampling point corresponding to the maximum value of the sampled voltage in the first voltage waveform data as the starting sampling point, and obtain the data sampling point and its sampled voltage value half a sampling period after the starting sampling point, and the data sampling point half a sampling period after the starting sampling point is the falling edge waveform data sampling point in the first voltage waveform data; the first data processing unit is used to perform data XOR processing on the received first voltage waveform data to obtain at least two peak data sampling points; based on any one of the two peak data sampling points, the sampled voltage value of the voltage data sampling point at the previous sampling time is greater than the sampled voltage average value, and the sampled voltage value of the voltage data sampling point at the next sampling time is less than the sampled voltage average value. a second data processing unit, used to gradually reduce the voltage value range of the first triangular wave signal based on the step voltage value, and perform data XOR processing on the received first voltage waveform data corresponding to the voltage value range, until a unique peak data sampling point is obtained, and the unique peak data sampling point is the lowest peak data sampling point in the falling edge waveform; wherein, based on the unique peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; an output unit, used to output the voltage value of the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it.

[0052] Preferably, the data sampling point acquisition unit comprises a voltage waveform data acquisition subunit, a first calculation subunit communicatively connected to the voltage waveform data acquisition subunit, and an acquisition subunit communicatively connected to the calculation subunit.

[0053] The voltage waveform data acquisition subunit is used to acquire first voltage waveform data, wherein the first voltage waveform data includes voltage data sampling points, the number of voltage data sampling points, and a first triangular wave voltage value range corresponding to the voltage data sampling points.

[0054] Specifically, in this embodiment, the voltage data sampling point position information in the first voltage waveform data is the sampling time of the voltage data sampling point, the number of voltage data sampling points is 10,000 points, and the triangular wave voltage value range corresponding to the voltage data sampling point in this embodiment is the first triangular wave voltage value range of 0 to 120V.

[0055] The first calculation subunit is used to calculate the product of the difference between the maximum value of the voltage value range of the triangular wave signal and the voltage value of the starting sampling point and the voltage coefficient to obtain the position information of the voltage data sampling point corresponding to the maximum value of the triangular wave voltage value range; wherein, half of the number of voltage data sampling points is divided by the maximum value of the voltage value range of the triangular wave signal to obtain the voltage coefficient between the voltage data sampling point and the corresponding voltage value.

[0056] Specifically, in this embodiment, the voltage coefficient coe between the voltage data sampling point and the corresponding voltage value is first calculated. The voltage coefficient is obtained by dividing half of the number of the voltage data sampling points by the maximum value of the voltage value range of the triangular wave signal. In this embodiment, the number of the voltage data sampling points is 10,000 points, and the initial voltage value range of the triangular wave signal is 0 to 120V, that is, the maximum value of the voltage value range of the triangular wave signal is 120V, and the calculation expression of the voltage coefficient coe is coe = 5000 / 120; then, the voltage value of the starting sampling point is obtained as V1, then the position size of the voltage data sampling point corresponding to the maximum value of the triangular wave voltage value range is expressed as size = (120 -V1)*coe.

[0057] The acquisition subunit is used to take the voltage data sampling point corresponding to the maximum value of the triangular wave voltage value range as the starting sampling point, obtain the voltage data sampling points and their sampled voltage values ​​of half the number of voltage data sampling points after the starting sampling point, and obtain the falling edge waveform data of half a sampling period. The waveform diagram corresponding to the falling edge waveform data is shown in the attached figure. Figure 5 As shown; specifically, in this embodiment, the starting sampling point position is taken as the reference point, and half of the voltage data sampling points after the starting sampling point, that is, 5000 voltage data sampling points after the starting sampling point, are the data sampling points of the falling edge waveform data of half a sampling period.

[0058] Preferably, the first data processing unit includes a second calculation subunit, a first judgment subunit communicatively connected to the second calculation subunit, and a first data processing subunit communicatively connected to the judgment subunit.

[0059] The second calculation subunit is used to calculate the sampled voltage average value of the falling edge waveform data according to the maximum sampled voltage value and the minimum sampled voltage value in the acquired falling edge waveform data.

[0060] Specifically, in this embodiment, the maximum sampling voltage and the minimum sampling voltage of the falling edge waveform data are taken, and the average sampling voltage is calculated. In this embodiment, the maximum sampling voltage and the minimum sampling voltage are both 5 voltage values. The sampling voltage values ​​are sorted in order of value size, and the first 5 sampling voltage values ​​are taken as the maximum sampling voltage, and the last 5 sampling voltage values ​​are taken as the minimum sampling voltage, and then the average sampling voltage is calculated.

[0061] The first judgment subunit is used to take the data sampling points in the falling edge waveform data whose sampling voltage values ​​are greater than or equal to the sampling voltage average value as the first sampling point set, and take the data sampling points in the falling edge waveform data whose sampling voltage values ​​are less than the sampling voltage average value as the second sampling point set.

[0062] Specifically, in this embodiment, the sampled voltage values ​​corresponding to all the data sampling points in the falling edge waveform data are first compared with the sampled voltage average value. If the sampled voltage value is greater than or equal to the sampled voltage average value, the data sampling point corresponding to the sampled voltage value is recorded as 1 and put into the first sampling point set. If the sampled voltage value is less than the sampled voltage average value, the data sampling point corresponding to the sampled voltage value is recorded as 0 and put into the first sampling point set; then, all the comparison results in the first sampling point set and the second sampling point set are subjected to an XOR operation according to the sampling time of the data sampling point. XOR is a logical operator. If the two values ​​used for comparison are the same, the XOR result is 0, and if they are different, the result is 1. After the XOR operation, the number of data sampling points with a result of 1 can be obtained. A result of 1 indicates that the previous data sampling point of this data sampling point is greater than the voltage average, and the next data sampling point of this data sampling point is less than the voltage average. Finally, the number of data sampling points with an XOR result of 1 must be at least greater than 2, thereby determining that there is a complete pit-shaped band in the falling edge waveform, wherein the definition of a complete pit-shaped band is that due to the rapid increase in the voltage value change rate of the data sampling point, the voltage value of the data sampling point in the falling edge waveform rapidly decreases and reaches the trough and then rapidly increases to form a pit-shaped band; the complete pit-shaped band includes two bands, the first band is a rapid decline band, and the second band is a rapid rise band.

[0063] The first data processing subunit is used to perform an exclusive OR operation on the data sampling points in the first sampling point set and the second sampling point set according to the sampling time to obtain at least two peak data sampling points, so as to determine that there is a complete pit-shaped band in the falling edge waveform; and to search for a voltage waveform corresponding to at least two peak data sampling points from the falling edge waveform data, as shown in the attached figure. Figure 6 As shown; wherein, based on the peak data sampling point, the sampled voltage value of the voltage data sampling point at the previous sampling time is greater than the sampled voltage average value, and the sampled voltage value of the voltage data sampling point at the next sampling time is less than the sampled voltage average value.

[0064] Preferably, the second data processing unit includes a second data processing sub-unit, a third data processing sub-unit communicatively connected to the second data processing sub-unit, and a second determination sub-unit communicatively connected to the third data processing sub-unit.

[0065] The second data processing sub-unit performs smoothing filtering and extraction on the data sampling points of the acquired falling edge waveform data, and then performs derivative processing, and takes the sampling voltage values ​​corresponding to the data sampling points greater than 0 as the third sampling point set, and the sampling voltage values ​​corresponding to the data sampling points less than 0 as the fourth sampling point set.

[0066] Specifically, in this embodiment, in order to avoid the influence of glitches, after the acquired falling edge waveform data D1 is smoothed and filtered, some data sampling points are extracted from the falling edge waveform data D1 in proportion to obtain a set of falling edge waveform data D2 with fewer glitches; then the data sampling points in the falling edge waveform data D2 are differentiated, and extracted according to a certain coefficient to obtain the falling edge waveform data D3, and then the data sampling points in the falling edge waveform data D3 whose sampling voltage values ​​are greater than 0 are marked as 1 and included in the third sampling point set, and the data sampling points in the falling edge waveform data D3 whose sampling voltage values ​​are less than 0 are marked as 0 and included in the fourth sampling point set.

[0067] The third data processing sub-unit performs an exclusive OR operation on the data sampling points in the third sampling point set and the fourth sampling point set according to the sampling time to obtain a unique or more peak data sampling point; wherein, based on the peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value.

[0068] Specifically, in this embodiment, the falling edge waveform contains one or more peak data sampling points, and the data sampling points are XORed according to the sampling time. The purpose is to obtain the peak data sampling point in the falling edge data. If there is only one peak data sampling point, the peak data sampling point is confirmed to be the lowest peak data sampling point.

[0069] The second judgment subunit is used to confirm that the only peak voltage data sampling point is the lowest peak data sampling point in the falling edge waveform when only one peak voltage data sampling point is obtained, and output the sampling voltage value corresponding to the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it; when more than one peak voltage data sampling point is obtained, the voltage value range of the first triangular wave signal is narrowed based on the step voltage value, and the above steps are repeated until the only peak voltage data sampling point is obtained, and then the only peak voltage data sampling point is confirmed to be the lowest peak data sampling point in the falling edge waveform, and the sampling voltage value corresponding to the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it are output.

[0070] Specifically, in the present embodiment, the step voltage value is a voltage value that once narrows the voltage value range of the first triangular wave signal. For example, the initial voltage value range of the first triangular wave signal is 0-120V. If the step voltage value is set to 2V, after narrowing the voltage value range of the first triangular wave signal to 0-118V, it is determined whether only one peak voltage data sampling point can be obtained in the falling edge waveform. If so, the peak voltage data sampling point is set as the lowest peak data sampling point, and based on the sampling voltage value corresponding to the lowest peak data sampling point, the voltage value range of the first triangular wave signal of 0-118V is obtained; if not, the voltage value range of the first triangular wave signal is narrowed to 0-118V, and it is determined whether only one peak voltage data sampling point can be obtained in the falling edge waveform; therefore, this step is repeatedly executed to narrow the voltage value range of the first triangular wave signal until a peak voltage data sampling point is obtained, and the voltage waveform diagram corresponding to the unique peak data sampling point is searched from the falling edge waveform data, as shown in the attached figure. Figure 7 shown.

[0071] The embodiment of the present invention further provides a spectrum monitoring platform, including the above laser control device. The spectrum monitoring platform and the laser control device based on Rydberg atoms have the same technical concept and the same technical effect, which will not be described in detail here.

Claims

1. A laser control device based on Rydberg atoms, comprising a core processor, a first signal acquisition processing module, a first laser and an atomic gas chamber, wherein the first signal acquisition processing module comprises a first digital-to-analog converter, a second digital-to-analog converter, a first combining amplifier, a first signal conditioning circuit, a first analog-to-digital converter and a first field bus, characterized in that: The core processor includes a triangular wave signal generating module, a voltage waveform data analyzing module, a frequency discriminator and a PID control unit; the triangular wave signal generating module is connected to the first digital-to-analog converter through the first output terminal of the core processor, the voltage waveform data analyzing module is connected to the second digital-to-analog converter through the second output terminal of the core processor, the frequency discriminator is connected to the first analog-to-digital converter through the first input terminal of the core processor, and the PID control unit is connected to the frequency discriminator through its input terminal; The first digital-to-analog converter is communicatively connected to the input end of the first combiner amplifier through its output end, and the second digital-to-analog converter is communicatively connected to the input end of the first combiner amplifier through its output end; the first laser is communicatively connected to the output end of the first combiner amplifier through its input end, and the first laser is communicatively connected to the input end of the atomic gas chamber through its output end; the first signal conditioning circuit is connected to the output end of the atomic gas chamber through its input end, and the first signal conditioning circuit is communicatively connected to the input end of the first analog-to-digital converter through its output end; the first analog-to-digital converter is communicatively connected to the first input end of the core processor through its output end; A triangle wave signal generating module, used for generating a first triangle wave signal and outputting it to a first digital-to-analog converter through a first output terminal of a core processor; A first digital-to-analog converter, used for performing digital-to-analog conversion on the first triangular wave signal and outputting the converted signal to the first combining amplifier; The first combining amplifier is used to amplify the first triangular wave signal and output it to the first laser; the first laser is used to generate a first laser signal according to the first triangular wave signal and output it to the atomic gas chamber; the atomic gas chamber is used to convert the first laser signal from the first laser and the fifth laser signal from the second laser and generate a first current signal, and then transmit the first current signal to the first signal conditioning circuit; the first signal conditioning circuit is used to convert the first current signal into a first voltage signal and transmit it to the first analog-to-digital converter; the first analog-to-digital converter is used to perform analog-to-digital conversion on the first voltage signal into first voltage waveform data and output it to the voltage waveform data analysis module in the core processor; A voltage waveform data analysis module is used to perform data analysis on the first voltage waveform data to obtain the lowest peak voltage value of the falling edge waveform in the first voltage waveform data; a triangle wave signal generation module is used to generate a second triangle wave signal according to the lowest peak voltage value and its corresponding voltage scanning range, and then output it to the first digital-to-analog converter through the first output terminal of the core processor, wherein the maximum voltage value and the minimum voltage value of the second triangle wave signal are both the lowest peak voltage value; The modulation signal generation module is used to generate a sine wave modulation signal and output it to the second digital-to-analog converter through the second output terminal of the core processor; the first digital-to-analog converter is also used to perform digital-to-analog conversion on the second triangle wave signal and output it to the first combiner amplifier, and the second digital-to-analog converter is also used to perform digital-to-analog conversion on the sine wave modulation signal and output it to the first combiner amplifier; the first combiner amplifier is also used to perform signal superposition on the second triangle wave signal and the sine wave modulation signal to form a first adjustment signal, and to perform signal amplification on the first adjustment signal and output the first adjustment signal to the first laser; the first laser is also used to generate a second laser signal after receiving the first adjustment signal and transmit it to the atomic gas chamber; the atomic gas chamber is also used to convert the second laser signal received from the first laser and the fifth laser signal of the second laser into a second current signal and transmit the second current signal to the first signal conditioning circuit; the first signal conditioning circuit is also used to convert the second current signal into a second voltage signal and transmit it to the first analog-to-digital converter; the first analog-to-digital converter is also used to perform analog-to-digital conversion on the second voltage signal and output the second voltage waveform data to the frequency discriminator; The frequency discriminator is used to perform frequency discrimination processing on the second voltage waveform data, generate frequency discrimination data and input the frequency discrimination data as an error input value to the PID control unit; The PID control unit is used to generate an offset voltage signal according to the error input value, and superimpose the offset voltage signal with the second triangular wave signal to form a third triangular wave signal, and then output it to the first digital-to-analog converter through the first output terminal of the core processor; The first digital-to-analog converter is further used to perform digital-to-analog conversion on the third triangle wave signal and output it to the first combining amplifier; the first combining amplifier is further used to perform signal superposition on the third triangle wave signal and the sine wave modulation signal to form a second adjustment signal, amplify the signal and output the second adjustment signal to the first laser; the first laser is further used to generate a third laser signal after receiving the second adjustment signal and transmit it to the atomic gas chamber.

2. A laser control device based on Rydberg atoms as claimed in claim 1, characterized in that: The device also includes a second signal acquisition and processing module, a second laser and a saturation absorption module, wherein the second signal acquisition and processing module includes a third digital-to-analog converter, a fourth digital-to-analog converter, a second combining amplifier, a second signal conditioning circuit, a second analog-to-digital converter and a second field bus; The triangle wave signal generation module is connected to the third digital-to-analog converter through the third output terminal of the core processor, the voltage waveform data analysis module is connected to the fourth digital-to-analog converter through the fourth output terminal of the core processor, and the frequency detector is connected to the second analog-to-digital converter through the second input terminal of the core processor; The third digital-to-analog converter is communicatively connected to the input end of the second combiner amplifier via its output end, and the fourth digital-to-analog converter is communicatively connected to the input end of the second combiner amplifier via its output end; The second laser is connected to the output end of the second combiner amplifier through its input end, and the second laser is connected to the input end of the atomic gas chamber and the input end of the saturation absorption module respectively; the second signal conditioning circuit is connected to the output end of the saturation absorption module through its input end, and the second signal conditioning circuit is connected to the input end of the second analog-to-digital converter through its output end; The second analog-to-digital converter is communicatively connected to the second input terminal of the core processor via its output terminal; A triangle wave signal generating module, used for generating a first triangle wave signal and outputting it to a third digital-to-analog converter through a third output terminal of the core processor; A third digital-to-analog converter, used for performing digital-to-analog conversion on the first triangular wave signal and outputting the converted signal to the second combining amplifier; The second combiner amplifier is used to amplify the first triangular wave signal and output it to the second laser; the second laser is used to generate a first laser signal according to the first triangular wave signal and output it to the saturation absorption module and the atomic gas chamber; the saturation absorption module is used to convert the first laser signal from the second laser and generate a first current signal, and then transmit the first current signal to the second signal conditioning circuit; a second signal conditioning circuit, used for converting the first current signal into a first voltage signal and transmitting the first voltage signal to a second analog-to-digital converter; A second analog-to-digital converter, used for performing analog-to-digital conversion of the first voltage signal into first voltage waveform data and then outputting the data to a voltage waveform data analysis module in the core processor; The voltage waveform data analysis module is further used to perform data analysis on the first voltage waveform data to obtain the lowest peak voltage value of the falling edge waveform in the first voltage waveform data; the triangle wave signal generation module is used to generate a fourth triangle wave signal according to the lowest peak voltage value and its corresponding voltage scanning range, and then output it to the third digital-to-analog converter through the third output terminal of the core processor, and the maximum voltage and the minimum voltage of the fourth triangle wave signal are both the lowest peak voltage value; the modulation signal generation module is used to generate a sine wave modulation signal and output it to the fourth digital-to-analog converter through the fourth output terminal of the core processor; The third digital-to-analog converter is further used to perform digital-to-analog conversion on the fourth triangle wave signal and output it to the second combiner amplifier. The fourth digital-to-analog converter is further used to perform digital-to-analog conversion on the sine wave modulation signal and output it to the second combiner amplifier. The second combiner amplifier is further used to perform signal superposition on the fourth triangle wave signal and the sine wave modulation signal to form a third adjustment signal, amplify the signal and output the third adjustment signal to the second laser. The second laser is further used to generate a fourth laser signal after receiving the third adjustment signal and transmit it to the saturation absorption module and the atomic gas chamber. The saturation absorption module is further used to convert the fourth laser signal into a third current signal and transmit the third current signal to the second signal conditioning circuit. The second signal conditioning circuit is further used to convert the third current signal into a third voltage signal and transmit it to the second analog-to-digital converter. The second analog-to-digital converter is further used to perform analog-to-digital conversion on the third voltage signal and output the third voltage waveform data to the frequency discriminator; The frequency discriminator is used to perform frequency discrimination processing on the third voltage waveform data, generate frequency discrimination data and input the frequency discrimination data as an error input value to the PID control unit; the PID control unit is used to generate an offset voltage signal according to the error input value and superimpose the offset voltage signal with the fourth triangular wave signal to form a fifth triangular wave signal, and then output it to the third digital-to-analog converter through the third output terminal of the core processor; The third digital-to-analog converter is further used to perform digital-to-analog conversion on the fifth triangle wave signal and output it to the second combining amplifier; the second combining amplifier is further used to perform signal superposition on the fifth triangle wave signal and the sine wave modulation signal to form a fourth adjustment signal, amplify the signal and output the fourth adjustment signal to the second laser; the second laser is further used to generate a fifth laser signal after receiving the fourth adjustment signal and transmit it to the atomic gas chamber.

3. A laser control device based on Rydberg atoms as claimed in claim 2, characterized in that: The voltage waveform data analysis module includes a data sampling point acquisition unit, a first data processing unit communicatively connected to the data sampling point acquisition unit, a second data processing unit communicatively connected to the first data processing unit, and an output unit communicatively connected to the second data processing unit; A data sampling point acquisition unit is used to use the data sampling point corresponding to the maximum value of the sampled voltage in the first voltage waveform data as the starting sampling point, and acquire the data sampling point and the sampled voltage value of half a sampling period after the starting sampling point, wherein the data sampling point of half a sampling period after the starting sampling point is the falling edge waveform data sampling point in the first voltage waveform data; A first data processing unit, configured to perform data XOR processing on the received first voltage waveform data to obtain at least two peak data sampling points; Based on any one of the two peak data sampling points, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; A second data processing unit is used to step-by-step reduce the voltage value range of the first triangular wave signal based on the step voltage value, and perform data XOR processing on the received first voltage waveform data corresponding to the voltage value range until a unique peak data sampling point is obtained, and the unique peak data sampling point is the lowest peak data sampling point in the falling edge waveform; wherein, based on the unique peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; The output unit is used to output the voltage value of the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it.

4. A laser control device based on Rydberg atoms as claimed in claim 3, characterized in that: The data sampling point acquisition unit includes a voltage waveform data acquisition subunit, a first calculation subunit connected to the voltage waveform data acquisition subunit in communication, and an acquisition subunit connected to the calculation subunit in communication; A voltage waveform data acquisition subunit, used to acquire first voltage waveform data, wherein the first voltage waveform data includes voltage data sampling points, the number of voltage data sampling points, and a triangular wave voltage value range corresponding to the voltage data sampling points; The first calculation subunit is used to calculate the product of the difference between the maximum value of the voltage value range of the triangular wave signal and the voltage value of the starting sampling point and the voltage coefficient, so as to obtain the position information of the voltage data sampling point corresponding to the maximum value of the triangular wave voltage value range; wherein, half of the number of the voltage data sampling points is divided by the maximum value of the voltage value range of the triangular wave signal to obtain the voltage coefficient between the voltage data sampling point and the voltage value corresponding to it; The acquisition subunit is used to take the voltage data sampling point corresponding to the maximum value of the triangle wave voltage value range as the starting sampling point, obtain the voltage data sampling points and their sampled voltage values ​​of half the number of voltage data sampling points after the starting sampling point, and obtain the falling edge waveform data of half a sampling period.

5. A laser control device based on Rydberg atoms as claimed in claim 4, characterized in that: The first data processing unit includes a second computing subunit, a first judging subunit communicatively connected to the second computing subunit, and a first data processing subunit communicatively connected to the judging subunit; A second calculation subunit is used to calculate the average value of the sampled voltage of the falling edge waveform data according to the maximum value and the minimum value of the sampled voltage in the acquired falling edge waveform data; A first judgment subunit is used to take data sampling points in the falling edge waveform data where the sampling voltage value is greater than or equal to the sampling voltage average value as a first sampling point set, and take data sampling points in the falling edge waveform data where the sampling voltage value is less than the sampling voltage average value as a second sampling point set; The first data processing sub-unit is used to perform exclusive OR operations on the data sampling points in the first sampling point set and the second sampling point set according to the sampling time, so as to obtain at least two peak data sampling points, thereby determining that there is a complete pit-shaped band in the falling edge waveform; wherein, based on the peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value.

6. A laser control device based on Rydberg atoms as claimed in claim 5, characterized in that: The second data processing unit includes a second data processing sub-unit, a third data processing sub-unit communicatively connected to the second data processing sub-unit, and a second judgment sub-unit communicatively connected to the third data processing sub-unit; The second data processing subunit performs smoothing filtering and extraction on the acquired data sampling points of the falling edge waveform data, and then performs derivative processing, and takes the sampling voltage values ​​corresponding to the data sampling points greater than 0 as the third sampling point set, and the sampling voltage values ​​corresponding to the data sampling points less than 0 as the fourth sampling point set; The third data processing subunit performs an exclusive OR operation on the data sampling points in the third sampling point set and the fourth sampling point set according to the sampling time to obtain a single or more peak data sampling points; wherein, based on the peak data sampling point, the sampling voltage value of the voltage data sampling point at the previous sampling time is greater than the sampling voltage average value, and the sampling voltage value of the voltage data sampling point at the next sampling time is less than the sampling voltage average value; The second judgment subunit is used to confirm that the only peak voltage data sampling point is the lowest peak data sampling point in the falling edge waveform when only one peak voltage data sampling point is obtained, and output the sampling voltage value corresponding to the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it; when more than one peak voltage data sampling point is obtained, the voltage value range of the first triangular wave signal is narrowed based on the step voltage value, and the above steps are repeated until the only peak voltage data sampling point is obtained, and then the only peak voltage data sampling point is confirmed to be the lowest peak data sampling point in the falling edge waveform, and the sampling voltage value corresponding to the lowest peak data sampling point and the voltage value range of the first triangular wave signal corresponding to it are output.

7. A spectrum monitoring platform, characterized in that: A laser control device based on Rydberg atoms comprising any one of claims 1 to 6.

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