Acoustooptic crystal driving circuit and method for beam atomic gyro fluorescence modulation detection

Abstract

The present application relates to the sound light crystal drive circuit and method for beam atomic gyro fluorescence modulation detection, including microprocessor, direct digital frequency synthesizer, radio frequency power amplifier, analog to digital converter and digital to analog converter, through using direct digital frequency synthesizer device realizes the radio frequency signal output of high output frequency precision, wide frequency range, fast frequency switching speed;Through the use of microprocessor realizes the integration of sound light crystal modulator drive frequency control, fluorescence modulation parameter control, fluorescence signal acquisition control, fluorescence signal demodulation, host computer data communication transmission and other multiple functions, fully replaces the use of a crowd of commercial equipment of traditional fluorescence modulation detection scheme, greatly improves the hardware integration and user customizable level, thereby helps to promote the system integration of beam atomic gyro and engineering application.

Description

Technical Field

[0001] This invention belongs to the field of beam atomic gyroscope technology, and in particular to an acousto-optic crystal driving circuit and method for fluorescence modulation detection of beam atomic gyroscopes. Background Technology

[0002] Beam-atomic interferometry has overcome the technical bottleneck of continuous measurement in traditional cold atom cluster interferometry and is gradually being applied to the development of high-bandwidth atomic gyroscopes, becoming one of the research hotspots in quantum inertial measurement. To improve the detection sensitivity of beam-atomic gyroscopes, fluorescence modulation detection technology is needed to accurately measure the intensity of the fluorescence signal generated by stimulated atomic transitions. Fluorescence modulation detection is a phase-locked detection method that applies frequency modulation to the probe light and performs same-frequency reference demodulation on the fluorescence signal. When the probe light frequency is modulated, the detuning of the probe light frequency relative to the atomic resonant transition frequency is modulated, thereby modulating the intensity of the fluorescence signal generated by stimulated atomic transitions. By using a reference signal with the same frequency as the modulation to demodulate the fluorescence signal, high signal-to-noise ratio detection of the atomic beam fluorescence signal can be achieved.

[0003] An acousto-optic crystal modulator is an acousto-optic crystal device that, by applying a radio frequency (RF) drive signal to the crystal, can redshift / blueshift the frequency of laser light passing through the crystal to the same frequency as the RF drive frequency. It is widely used in the field of atomic interferometry for output control of various functional lasers. The acousto-optic crystal drive circuit is responsible for generating the drive signal required by the acousto-optic crystal modulator, typically an RF drive signal ranging from tens to hundreds of megahertz. Traditional acousto-optic crystal drive circuits are generally based on the principle of voltage-controlled oscillators (VCOs), using external voltage fine-tuning to adjust the crystal drive frequency within a certain frequency range.

[0004] In fluorescence modulation detection of beam-current atomic gyroscopes, the probe light is typically modulated by applying modulation to the drive signal of an acousto-optic crystal modulator in the probe light path. Existing beam-current atomic gyroscope fluorescence modulation detection technology uses a modulation voltage generated by a commercially available lock-in amplifier to modulate the output signal of a voltage-controlled oscillator (VCO). The modulated fluorescence signal is then input to a commercially available lock-in amplifier for demodulation, and finally, data is acquired by a commercial data acquisition device and processed by a host computer. The technical bottlenecks are: first, the output frequency accuracy of the VCO is not high, and the frequency range is relatively small. A single device may not be able to meet the different probe light drive frequency requirements under different laser schemes, and the probe light frequency modulation depth is easily limited by the finite frequency output range of the VCO; second, the output frequency switching speed of the VCO is relatively slow, resulting in a limitation on the highest modulation frequency of the probe light that can be applied; third, the commercially available lock-in amplifiers and commercial data acquisition devices currently used for modulation / demodulation and data processing not only increase the overall system size and cost but also hinder the design of integrated human-machine interfaces and host computer software, severely restricting the engineering application of beam-current atomic gyroscopes. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and propose an acousto-optic crystal driving circuit and method for fluorescence modulation detection of beam atomic gyroscopes. This circuit can control a direct digital frequency synthesizer to achieve flexible radio frequency output configuration and integrate functions such as fluorescence signal acquisition, signal demodulation, and upper computer data transmission, laying the foundation for the development of engineered beam atomic gyroscope products.

[0006] The technical problem solved by this invention is achieved through the following technical solution:

[0007] An acousto-optic crystal driving circuit for fluorescence modulation detection in a beam atomic gyroscope is installed on the beam atomic gyroscope and includes a microprocessor, a direct digital frequency synthesizer, an RF power amplifier, an analog-to-digital converter (ADC), and a digital-to-analog converter (DAC). The output of the RF power amplifier outputs a modulation drive signal, the input of the ADC receives the fluorescence signal to be demodulated, the output of the DAC outputs the analog demodulation result, the output of the ADC and the input of the DAC are respectively connected to the microprocessor, the input of the RF power amplifier is connected to the output of the direct digital frequency synthesizer, and the input of the direct digital frequency synthesizer is connected to the microprocessor.

[0008] Furthermore, the direct digital frequency synthesizer is used to generate a radio frequency signal to drive the acousto-optic crystal modulator in response to the parameter configuration of the microprocessor; the radio frequency power amplifier is used to amplify the radio frequency signal generated by the direct digital frequency synthesizer to meet the driving power requirements of the acousto-optic crystal modulator; the analog-to-digital converter is used to convert the analog signal output by the fluorescence detector into a digital signal for processing by the microprocessor in response to the conversion control command of the microprocessor; the digital-to-analog converter is used to convert the digital demodulation result output by the microprocessor into an analog signal in response to the conversion control command of the microprocessor, for data processing or data monitoring by other modules of the beam atomic gyroscope.

[0009] Furthermore, the first signal output terminal of the microprocessor is connected to the first signal input terminal of the direct digital frequency synthesizer via a serial peripheral interface 1, and is used to send the modulation frequency control word generated by the modulation generation module inside the microprocessor to the direct digital frequency synthesizer via the peripheral control module; the first signal output terminal of the direct digital frequency synthesizer is connected to the first signal input terminal of the radio frequency power amplifier, and is used to transmit the modulated radio frequency signal; the first signal output terminal of the analog-to-digital converter is connected to the first signal input terminal of the microprocessor via a serial peripheral interface 2, and is used to transmit the fluorescence signal to be demodulated, which has been converted into a digital quantity, to the demodulation module of the microprocessor via the peripheral control module; the second signal output terminal of the microprocessor is connected to the first signal input terminal of the digital-to-analog converter via a serial peripheral interface 3, and is used to convert the digital demodulation result output by the demodulation module into an analog signal and output it to other data acquisition / monitoring equipment via the peripheral control module.

[0010] Furthermore, the first signal output terminal of the driving circuit is a modulated driving signal output by an RF power amplifier, used to drive the acousto-optic crystal modulator; the second signal output terminal of the driving circuit is an analog fluorescence demodulation result output by a digital-to-analog converter, used for data acquisition, processing, or monitoring; the third signal output terminal of the driving circuit is a digital fluorescence demodulation result output by a microprocessor, used to transmit to the beam atomic gyroscope host computer for data processing; and the first signal input terminal of the driving circuit is the fluorescence signal to be demodulated obtained by a fluorescence detector and input to the analog-to-digital converter.

[0011] Furthermore, the microprocessor includes a peripheral control module, a modulation generation module, a demodulation module, and a data transmission module. The peripheral control module is bidirectionally connected to the demodulation module for transmitting fluorescence signals and receiving demodulated outputs. The modulation generation module is connected to the peripheral control module for transmitting modulation frequency control words. The modulation generation module is connected to the demodulation module for transmitting synchronization reference signals. The demodulation module is connected to the data transmission module.

[0012] A driving method for an acousto-optic crystal driving circuit for fluorescence modulation detection in a beam atomic gyroscope includes the following steps:

[0013] Step 1: The peripheral control module initializes the basic parameters of the direct digital frequency synthesizer, analog-to-digital converter and digital-to-analog converter. At the same time, the demodulation module enters the waiting for reference signal stage to determine whether a reference signal has been received. If a reference signal is received, proceed to step 2; otherwise, continue to determine whether a reference signal has been received.

[0014] Step 2: After the peripheral control module initializes the direct digital frequency synthesizer, analog-to-digital converter and digital-to-analog converter, it enters the waiting stage for the frequency control word. It determines whether the frequency control word has been received. If it has, it proceeds to step 3. Otherwise, it continues to determine whether the frequency control word has been received. At the same time, the modulation generation module generates a modulation signal and sends it to the demodulation module, and further generates a modulation frequency control word and sends it to the peripheral control module.

[0015] Step 3: After receiving the modulation frequency control word, the peripheral control module configures the output frequency of the direct digital frequency synthesizer.

[0016] Step 4: After the direct digital frequency synthesizer completes the frequency configuration, it starts the acquisition configuration and data conversion control of the analog-to-digital converter. The fluorescent signal converted by the analog-to-digital converter and the synchronization reference signal of the demodulation module received by the peripheral control module are simultaneously sent to the demodulation multiplier unit of the demodulation module. After passing through the multiplier, it is further sent to the low-pass filter unit to complete the demodulation calculation. At the same time, the data transmission module enters the waiting stage for demodulation data and determines whether demodulation data has been received. If demodulation data is received, proceed to step 5; otherwise, continue to determine whether demodulation data has been received.

[0017] Step 5: The demodulation calculation results are sent to the peripheral control module and the data transmission module, respectively;

[0018] Step 6: The peripheral control module configures the digital-to-analog converter to convert the demodulation calculation results into analog outputs. The data transmission module writes the demodulation results into the first-in-first-out storage unit. At the same time, it reads the demodulation calculation results in the storage unit through the universal asynchronous transceiver and transmits them to the beam atom gyroscope host computer.

[0019] The advantages and positive effects of this invention are:

[0020] 1. This invention achieves high frequency accuracy, wide frequency range, and fast frequency switching speed of radio frequency signal output by using a direct digital frequency synthesizer. This not only helps to improve the driving frequency accuracy performance and broaden the application scenarios of acousto-optic crystal modulator driving under various applicable laser schemes, but also helps to realize the frequency modulation driving signal output of acousto-optic crystal modulator with deep modulation depth and high modulation frequency.

[0021] 2. This invention integrates multiple functions, such as acousto-optic crystal modulator driving frequency control, fluorescence modulation parameter control, fluorescence signal acquisition control, fluorescence signal demodulation, and upper and lower computer data communication transmission, by using a microprocessor. It completely replaces the use of a number of commercial devices with traditional fluorescence modulation detection schemes, greatly improves the hardware integration and user customization level, and thus helps to promote the system integration development and engineering application of beam atomic gyroscopes.

[0022] 3. This invention achieves both analog and digital demodulation result output by using a digital-to-analog converter and a microprocessor, which can adapt to different data processing requirements of the beam atomic gyroscope system. Compared with the traditional fluorescence modulation detection scheme, the data interface is more convenient and user-friendly, and it is easier to transmit data with other components of the beam atomic gyroscope.

[0023] 4. The hardware design of this invention is simple and the internal signal path is clear. While retaining the necessary signals, it minimizes the number of external signal paths. The single-board design replaces the discrete module stacking of traditional fluorescence modulation detection schemes and the resulting complex data transmission paths. This helps to reduce the faults and interference factors that may be caused by complex signal paths and has better maintainability.

[0024] 5. The core control mechanism and solution algorithm of this invention are implemented through software code, which is highly reconfigurable and facilitates adaptation and improvement design for specific problems and needs. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the driving circuit of the present invention;

[0026] Figure 2 This is a flowchart of the driving method of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] An acousto-optic crystal driving circuit for fluorescence modulation detection in a beam atomic gyroscope is mounted on the beam atomic gyroscope, such as... Figure 1 As shown, the system includes a microprocessor, a direct digital frequency synthesizer, an RF power amplifier, an analog-to-digital converter (ADC), and a digital-to-analog converter (DAC). The output of the RF power amplifier outputs a modulation drive signal, the input of the ADC receives the fluorescence signal to be demodulated, the output of the DAC outputs the analog demodulation result, the output of the ADC and the input of the DAC are respectively connected to the microprocessor, the input of the RF power amplifier is connected to the output of the direct digital frequency synthesizer, and the input of the direct digital frequency synthesizer is connected to the microprocessor.

[0029] The direct digital frequency synthesizer is used to generate a radio frequency (RF) signal to drive the acousto-optic crystal modulator in response to the parameter configuration of the microprocessor; the RF power amplifier is used to amplify the RF signal generated by the direct digital frequency synthesizer to meet the driving power requirements of the acousto-optic crystal modulator; the analog-to-digital converter (ADC) is used to convert the analog signal output by the fluorescence detector into a digital signal for processing by the microprocessor in response to the conversion control command of the microprocessor; the digital-to-analog converter (DAC) is used to convert the digital demodulation result output by the microprocessor into an analog signal in response to the conversion control command of the microprocessor, for data processing or data monitoring by other modules of the beam atomic gyroscope.

[0030] The first signal output terminal of the microprocessor is connected to the first signal input terminal of the direct digital frequency synthesizer via serial peripheral interface 1, and is used to send the modulation frequency control word generated by the modulation generation module inside the microprocessor to the direct digital frequency synthesizer via the peripheral control module; the first signal output terminal of the direct digital frequency synthesizer is connected to the first signal input terminal of the radio frequency power amplifier, and is used to transmit the modulated radio frequency signal; the first signal output terminal of the analog-to-digital converter is connected to the first signal input terminal of the microprocessor via serial peripheral interface 2, and is used to transmit the fluorescence signal to be demodulated, which has been converted into a digital quantity, to the demodulation module of the microprocessor via the peripheral control module; the second signal output terminal of the microprocessor is connected to the first signal input terminal of the digital-to-analog converter via serial peripheral interface 3, and is used to convert the digital demodulation result output by the demodulation module into an analog signal and output it to other data acquisition / monitoring equipment via the peripheral control module.

[0031] The first signal output terminal of the driving circuit is a modulated driving signal output by the radio frequency power amplifier, used to drive the acousto-optic crystal modulator; the second signal output terminal of the driving circuit is the analog fluorescence demodulation result output by the digital-to-analog converter, used for data acquisition, processing or monitoring; the third signal output terminal of the driving circuit is the digital fluorescence demodulation result output by the microprocessor, used to transmit to the beam atomic gyroscope host computer for data processing; the first signal input terminal of the driving circuit is the fluorescence signal to be demodulated obtained by the fluorescence detector and input to the analog-to-digital converter.

[0032] The modulation generation module inside the microprocessor is responsible for generating a synchronization reference signal and transmitting it to the demodulation module inside the microprocessor.

[0033] The microprocessor can be implemented using a field-programmable gate array (FPGA). Programmed using a hardware description language, the microprocessor is divided into a peripheral control module, a modulation generation module, a demodulation module, and a data transmission module. The peripheral control module and the demodulation module are bidirectionally connected, used to transmit fluorescence signals and receive demodulated outputs. The modulation generation module is connected to the peripheral control module to transmit modulation frequency control words, and it is also connected to the demodulation module to transmit synchronization reference signals. The demodulation module is connected to the data transmission module.

[0034] The microprocessor's internal modulation generation module can use a soft-core module provided by a field-programmable gate array (FPGA) device manufacturer to generate a sinusoidal signal ranging from hundreds to thousands of hertz as the modulation signal, and a synchronously quadrature output cosine signal as the reference signal. The desired modulation frequency control word signal is obtained by multiplying the sinusoidal signal with the preset frequency control word of the direct digital frequency synthesizer corresponding to the preset frequency of the probe optical acousto-optic crystal modulator. The microprocessor's internal peripheral control module configures the modulation frequency control word to the direct digital frequency synthesizer via serial peripheral interface 1, thereby modulating the drive signal of the acousto-optic crystal modulator, and further, modulating the probe optical signal. The microprocessor's internal peripheral control module also controls the acquisition and conversion process of the analog-to-digital converter (ADC) via serial peripheral interface 2, obtaining the fluorescence signal to be demodulated after detection by the fluorescence detector and analog-to-digital conversion, and transmitting it to the demodulation module inside the microprocessor. The demodulation module inside the microprocessor implements digital multipliers and digital low-pass filters using soft-core modules provided by the corresponding device manufacturers. These functions are used for phase-locked loop (PLL) phase-sensitive detection and low-pass filtering, respectively. The signal output from the low-pass filtering soft-core module is the demodulated signal. This demodulated signal can be transmitted from the peripheral control module via serial peripheral interface 3 to a digital-to-analog converter for conversion into an analog signal, used for external data acquisition / monitoring. Alternatively, it can be used for first-in-first-out (FIFO) data storage within the data transmission module and transmitted to the host computer via a universal asynchronous transceiver for data processing by the host computer software.

[0035] A driving method for an acousto-optic crystal driving circuit for fluorescence modulation detection in a beam atomic gyroscope, such as... Figure 2 As shown, it includes the following steps:

[0036] Step 1: The peripheral control module initializes the basic parameters of the direct digital frequency synthesizer, analog-to-digital converter and digital-to-analog converter. At the same time, the demodulation module enters the waiting for reference signal stage to determine whether a reference signal has been received. If a reference signal is received, proceed to step 2; otherwise, continue to determine whether a reference signal has been received.

[0037] Step 2: After the peripheral control module initializes the direct digital frequency synthesizer, analog-to-digital converter and digital-to-analog converter, it enters the waiting stage for the frequency control word. It determines whether the frequency control word has been received. If it has, it proceeds to step 3. Otherwise, it continues to determine whether the frequency control word has been received. At the same time, the modulation generation module generates a modulation signal and sends it to the demodulation module, and further generates a modulation frequency control word and sends it to the peripheral control module.

[0038] Step 3: After receiving the modulation frequency control word, the peripheral control module configures the output frequency of the direct digital frequency synthesizer.

[0039] Step 4: After the direct digital frequency synthesizer completes the frequency configuration, it starts the acquisition configuration and data conversion control of the analog-to-digital converter. The fluorescent signal converted by the analog-to-digital converter and the synchronization reference signal of the demodulation module received by the peripheral control module are simultaneously sent to the demodulation multiplier unit of the demodulation module. After passing through the multiplier, it is further sent to the low-pass filter unit to complete the demodulation calculation. At the same time, the data transmission module enters the waiting stage for demodulation data and determines whether demodulation data has been received. If demodulation data is received, proceed to step 5; otherwise, continue to determine whether demodulation data has been received.

[0040] Step 5: The demodulation calculation results are sent to the peripheral control module and the data transmission module, respectively;

[0041] Step 6: The peripheral control module configures the digital-to-analog converter to convert the demodulation calculation results into analog outputs. The data transmission module writes the demodulation results into the first-in-first-out storage unit. At the same time, it reads the demodulation calculation results in the storage unit through the universal asynchronous transceiver and transmits them to the beam atom gyroscope host computer.

[0042] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention includes, but is not limited to, the embodiments described in the specific implementation. Any other implementations derived by those skilled in the art based on the technical solutions of this invention are also within the scope of protection of this invention.

Claims

1. An acousto-optic crystal driving circuit for fluorescence modulation detection in a beam atomic gyroscope, mounted on a beam atomic gyroscope, characterized in that: It includes a microprocessor, a direct digital frequency synthesizer, an RF power amplifier, an analog-to-digital converter (ADC), and a digital-to-analog converter (DAC). The output of the RF power amplifier outputs a modulation drive signal, the input of the ADC receives the fluorescence signal to be demodulated, the output of the DAC outputs the analog demodulation result, the output of the ADC and the input of the DAC are respectively connected to the microprocessor, the input of the RF power amplifier is connected to the output of the direct digital frequency synthesizer, and the input of the direct digital frequency synthesizer is connected to the microprocessor.

2. The acousto-optic crystal driving circuit for fluorescence modulation detection of beam atomic gyroscopes according to claim 1, characterized in that: The direct digital frequency synthesizer is used to generate a radio frequency signal to drive the acousto-optic crystal modulator in response to the parameter configuration of the microprocessor; the radio frequency power amplifier is used to amplify the radio frequency signal generated by the direct digital frequency synthesizer to meet the driving power requirements of the acousto-optic crystal modulator. The analog-to-digital converter is used to convert the analog signal output by the fluorescence detector into a digital signal for processing by the microprocessor in response to the conversion control command of the microprocessor; the digital-to-analog converter is used to convert the digital demodulation result output by the microprocessor into an analog signal in response to the conversion control command of the microprocessor, for data processing or data monitoring by other modules of the beam atomic gyroscope.

3. The acousto-optic crystal driving circuit for fluorescence modulation detection of beam atomic gyroscopes according to claim 1, characterized in that: The first signal output terminal of the microprocessor is connected to the first signal input terminal of the direct digital frequency synthesizer via serial peripheral interface 1, and is used to send the modulation frequency control word generated by the modulation generation module inside the microprocessor to the direct digital frequency synthesizer via the peripheral control module; the first signal output terminal of the direct digital frequency synthesizer is connected to the first signal input terminal of the radio frequency power amplifier, and is used to transmit the modulated radio frequency signal; the first signal output terminal of the analog-to-digital converter is connected to the first signal input terminal of the microprocessor via serial peripheral interface 2, and is used to transmit the fluorescence signal to be demodulated, which has been converted into a digital quantity, to the demodulation module of the microprocessor via the peripheral control module; the second signal output terminal of the microprocessor is connected to the first signal input terminal of the digital-to-analog converter via serial peripheral interface 3, and is used to convert the digital demodulation result output by the demodulation module into an analog signal and output it to other data acquisition / monitoring equipment via the peripheral control module.

4. The acousto-optic crystal driving circuit for fluorescence modulation detection of beam atomic gyroscopes according to claim 1, characterized in that: The first signal output terminal of the driving circuit is a modulated driving signal output by the radio frequency power amplifier, which is used to drive the acousto-optic crystal modulator. The second signal output of the driving circuit is the analog fluorescence demodulation result output by the digital-to-analog converter, which is used for data acquisition, processing or monitoring. The third signal output of the driving circuit is the digital fluorescence demodulation result output by the microprocessor, which is used to transmit to the beam atomic gyroscope host computer for data processing; The first signal input terminal of the driving circuit is the unmodulated fluorescence signal detected by the fluorescence detector and input to the analog-to-digital converter.

5. The acousto-optic crystal driving circuit for fluorescence modulation detection of beam atomic gyroscopes according to claim 1, characterized in that: The microprocessor includes a peripheral control module, a modulation generation module, a demodulation module, and a data transmission module. The peripheral control module and the demodulation module are bidirectionally connected and used to send fluorescence signals and receive demodulated outputs. The modulation generation module is connected to the peripheral control module to send modulation frequency control words. The modulation generation module is connected to the demodulation module to send synchronization reference signals. The demodulation module is connected to the data transmission module.

6. A driving method for an acousto-optic crystal driving circuit for fluorescence modulation detection of a beam atomic gyroscope as described in claim 3 or 5, characterized in that: Includes the following steps: Step 1: The peripheral control module initializes the basic parameters of the direct digital frequency synthesizer, analog-to-digital converter and digital-to-analog converter. At the same time, the demodulation module enters the waiting for reference signal stage to determine whether a reference signal has been received. If a reference signal is received, proceed to step 2; otherwise, continue to determine whether a reference signal has been received. Step 2: After the peripheral control module initializes the direct digital frequency synthesizer, analog-to-digital converter and digital-to-analog converter, it enters the waiting stage for the frequency control word. It determines whether the frequency control word has been received. If it has, it proceeds to step 3. Otherwise, it continues to determine whether the frequency control word has been received. At the same time, the modulation generation module generates a modulation signal and sends it to the demodulation module, and further generates a modulation frequency control word and sends it to the peripheral control module. Step 3: After receiving the modulation frequency control word, the peripheral control module configures the output frequency of the direct digital frequency synthesizer. Step 4: After the direct digital frequency synthesizer completes the frequency configuration, it starts the acquisition configuration and data conversion control of the analog-to-digital converter. The fluorescent signal converted by the analog-to-digital converter and the synchronization reference signal of the demodulation module received by the peripheral control module are simultaneously sent to the demodulation multiplier unit of the demodulation module. After passing through the multiplier, it is further sent to the low-pass filter unit to complete the demodulation calculation. At the same time, the data transmission module enters the waiting stage for demodulation data and determines whether demodulation data has been received. If demodulation data is received, proceed to step 5; otherwise, continue to determine whether demodulation data has been received. Step 5: The demodulation calculation results are sent to the peripheral control module and the data transmission module, respectively; Step 6: The peripheral control module configures the digital-to-analog converter to convert the demodulation calculation results into analog outputs. The data transmission module writes the demodulation results into the first-in-first-out storage unit. At the same time, it reads the demodulation calculation results in the storage unit through the universal asynchronous transceiver and transmits them to the beam atom gyroscope host computer.

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