Signal emission control method and device based on optical communication and signal emission laser

Abstract

The present invention relates to a signal emission control method, device and signal emission laser based on optical communication. The method: obtain the output light intensity data of the vertical cavity surface emitting laser within a preset temperature range and bias current range, determine the bistable working characteristic curve; obtain the vibration resonance gain signal; perform Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, and establish a signal nonlinear compensation model; apply a driving current pulse synchronized with the communication data, symmetrically sample the output signal after transient response control at the rising edge and the falling edge, and construct a signal quality evaluation vector; input a support vector regression model, establish a mapping relationship between light intensity characteristic parameters and drive control parameters, and generate a real-time control signal for the laser. The present invention realizes adaptive and precise control of the vertical cavity surface emitting laser, and ensures the stable operation of the signal emission laser under temperature and bias current fluctuation conditions.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to a signal transmission control method and device based on optical communication, and a signal transmission laser. Background Art

[0002] With the rapid development of optical communication technology, higher requirements are placed on the control accuracy and stability of signal transmitting lasers. Vertical cavity surface emitting lasers are widely used in optical communication systems due to their advantages such as low cost, low power consumption and high integration. However, the nonlinear characteristics and transient response problems of vertical cavity surface emitting lasers in the high-speed modulation process seriously affect the performance of communication systems.

[0003] Traditional VCSEL control methods mainly rely on direct modulation technology, which makes it difficult to effectively suppress the transient response and nonlinear distortion of the laser. At the same time, existing control methods lack full utilization of the bistable characteristics of VCSELs, and cannot achieve accurate modulation and fast switching of optical signals. In addition, conventional signal quality assessment methods cannot accurately reflect the dynamic characteristics changes of VCSELs during high-speed communication. In the actual application of optical communication systems, temperature drift, bias current fluctuations, and changes in environmental factors of VCSELs will lead to a decrease in the quality of the output optical signal. Existing technologies make it difficult to achieve real-time compensation and adaptive control of these factors, which restricts the transmission performance and reliability of optical communication systems. Summary of the invention

[0004] The main purpose of the present invention is to provide a signal transmission control method, device and signal transmission laser based on optical communication. The present invention realizes adaptive and precise control of the vertical cavity surface emitting laser, ensuring the stable operation of the signal transmission laser under temperature and bias current fluctuation conditions.

[0005] To achieve the above object, the present invention provides a signal transmission control method based on optical communication, comprising the following steps:

[0006] The output light intensity data of the vertical cavity surface emitting laser within a preset temperature range and bias current range are obtained, and the light injection response signal and the self-mixing interference signal are respectively collected through an orthogonal polarization state light injection system and a self-mixing interference measurement system to determine a bistable working characteristic curve;

[0007] Based on the bistable working characteristic curve, the polarization direction and injection power of the light injection response signal are modulated, and an all-optical switching effect is generated through the orthogonal polarization state light injection system to obtain a vibration resonance gain signal;

[0008] Performing Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculating the time-frequency conversion coefficient using fast Fourier transform, and establishing a signal nonlinear compensation model;

[0009] According to the signal nonlinear compensation model, applying a driving current pulse synchronized with the communication data to the vertical cavity surface emitting laser, optimizing the amplitude and duty cycle of the driving current pulse, and realizing transient response control;

[0010] The output signal after transient response control is sampled symmetrically at the rising and falling edges, and the light intensity peak and timing characteristics are extracted using a high-speed photodetection array to construct a signal quality evaluation vector.

[0011] The signal quality evaluation vector is input into a support vector regression model, a mapping relationship between light intensity characteristic parameters and drive control parameters is established, and a real-time control signal for the laser is generated.

[0012] The present invention also provides a signal transmission control device based on optical communication, comprising:

[0013] An acquisition module is used to acquire the output light intensity data of the vertical cavity surface emitting laser within a preset temperature range and a bias current range, collect the light injection response signal and the self-mixing interference signal respectively through an orthogonal polarization state light injection system and a self-mixing interference measurement system, and determine a bistable working characteristic curve;

[0014] A modulation module, used to modulate the polarization direction and injection power of the light injection response signal based on the bistable working characteristic curve, generate an all-optical switching effect through the orthogonal polarization state light injection system, and obtain a vibration resonance gain signal;

[0015] Establishing a module, used to perform Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculate the time-frequency conversion coefficient by fast Fourier transform, and establish a signal nonlinear compensation model;

[0016] an optimization module, configured to apply a driving current pulse synchronized with the communication data to the vertical cavity surface emitting laser according to the signal nonlinear compensation model, optimize the amplitude and duty cycle of the driving current pulse, and realize transient response control;

[0017] An extraction module is used to perform symmetrical sampling on the rising and falling edges of the output signal after transient response control, extract the light intensity peak value and timing characteristics using a high-speed photoelectric detection array, and construct a signal quality evaluation vector;

[0018] The generation module is used to input the signal quality evaluation vector into a support vector regression model, establish a mapping relationship between light intensity characteristic parameters and drive control parameters, and generate a real-time control signal for the laser.

[0019] The present invention also provides a signal transmitting laser, and the signal transmitting laser is used to implement the steps of any one of the above methods.

[0020] In summary, the technical solution provided by the present invention accurately obtains the bistable working characteristic curve of the vertical cavity surface emitting laser through the synergistic effect of the orthogonal polarization state light injection system and the self-mixing interferometer measurement system, and provides an accurate control basis for the subsequent optical signal modulation. By utilizing the all-optical switching effect and the vibration resonance mechanism, the modulation depth and switching rate of the optical signal are significantly improved, and the modulation characteristics of the vertical cavity surface emitting laser are effectively improved. The method of combining Gaussian distribution transformation and target phase sampling is adopted to achieve accurate compensation for nonlinear distortion and improve the transmission quality of the signal. Based on the transient response control technology, the overshoot and timing jitter of the signal are reduced by optimizing the amplitude and duty cycle parameters of the driving current pulse. An innovative symmetrical sampling architecture based on a high-speed photoelectric detection array is constructed to achieve high-precision extraction of optical signal features. The support vector regression model is introduced to establish the mapping relationship between the characteristic parameters and the control parameters, and the adaptive and precise control of the vertical cavity surface emitting laser is realized. Through the multi-level feedback control mechanism, the stable operation of the signal emitting laser under temperature and bias current fluctuation conditions is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the steps of a signal transmission control method based on optical communication in one embodiment of the present invention;

[0022] Figure 2 is a structural block diagram of a signal transmission control device based on optical communication in one embodiment of the present invention;

[0023] Figure 3 It is a schematic block diagram of the structure of a signal transmitting laser in one embodiment of the present invention.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Reference Figure 1 , this embodiment provides a signal transmission control method based on optical communication, comprising the following steps:

[0027] S1, obtaining output light intensity data of a vertical cavity surface emitting laser within a preset temperature range and a bias current range, collecting a light injection response signal and a self-mixing interference signal through an orthogonal polarization state light injection system and a self-mixing interference measurement system, respectively, and determining a bistable working characteristic curve;

[0028] Among them, a temperature sequence of a preset temperature range and a bias current sequence of a preset current range are input into the vertical cavity surface emitting laser, and the working conditions of the laser are controlled to cover the target parameter range, so as to stimulate the light output behavior of the laser under different temperature and current combinations. Subsequently, the output light signal of the laser is collected in real time by a photodetector to obtain complete light intensity data. The output light signal is power-distributed, and the output light signal is divided into two parts by an optical splitter. The light power of one part is set to the first target value and input into the orthogonal polarization state light injection system, and the light power of the other part is set to the second target value and input into the self-mixing interference measurement system to obtain the split light signal. In the orthogonal polarization state light injection system, by adjusting the output power of the injected light source to the preset power range, and using the polarization controller to accurately rotate the polarization state of the injected light, it is ensured that the injected light signal finally generated maintains an orthogonal relationship with the output light signal of the vertical cavity surface emitting laser. The characteristics of orthogonal polarization are used to enhance the resolution of the light injection effect. The generated injected light signal is re-input into the vertical cavity surface emitting laser through an optical circulator, and after interacting with the optical field inside the laser, the light injection response signal is collected from the output port of the optical circulator. At the same time, in the self-mixing interferometer measurement system, the position of the reflector is precisely adjusted so that the reflected light signal can produce coherent interference with the output light signal of the vertical cavity surface emitting laser through the fiber coupler, thereby obtaining a self-mixing interference signal in the system. These two signals reflect the dynamic response characteristics of the vertical cavity surface emitting laser under the light injection effect and the self-mixing interference effect, respectively. The light injection response signal is power scanned, and the injected light power is systematically adjusted to measure the output state of the laser at different power levels, and the power threshold sequence of the bistable transition is obtained. These thresholds describe how the working state of the laser switches between bistable states under different input power conditions. At the same time, the self-mixing interference signal is phase analyzed. By analyzing the time domain and frequency domain characteristics of the interference signal, the phase characteristic sequence of the bistable working area can be extracted, providing the phase dynamic behavior of the laser in the bistable region. The power threshold sequence extracted from the light injection response signal is combined with the phase characteristic sequence extracted from the self-mixing interference signal, and a mathematical model describing the bistable working characteristics of the laser is established through data fitting. The coefficient matrix obtained based on the fitting is used to describe the bistable working characteristic curve of the laser.

[0029] S2, based on the bistable working characteristic curve, modulate the polarization direction and injection power of the light injection response signal, generate an all-optical switching effect through the orthogonal polarization state light injection system, and obtain the vibration resonance gain signal;

[0030] Specifically, based on the bistable working characteristic curve, the power threshold and phase difference corresponding to the transition process are extracted by calculating the bistable transition points described in the curve. These parameters together constitute the bistable modulation parameters. The bistable modulation parameters are input into the orthogonal polarization state light injection system to ensure that the injected light signal is fully modulated in the system. The polarization direction of the injected light is finely adjusted by using a polarization controller, and the deflection angle of the polarization direction of the injected light is kept within a preset range by adjusting the deflection angle of the polarization direction, so as to generate a polarization modulated light signal that meets the design requirements. The purpose of polarization modulation is to optimize the dynamic performance of light injection by changing the polarization relationship between the injected light signal and the output light signal of the vertical cavity surface emitting laser. In order to fully characterize the influence of the injection power on the laser response, the injection power of the polarization modulated light signal is scanned step by step. By dividing the injection power range, an injection power sequence is generated, which covers the entire working range of the bistable characteristic curve. These power values ​​are applied to the vertical cavity surface emitting laser one by one, and the all-optical switch response data of the system are collected at each injection power value. These data record the dynamic characteristic changes of the laser under different injection power conditions. The all-optical switch response data is analyzed to extract the vibration resonance characteristics. By performing vibration resonance analysis on the response data, the corresponding resonance frequency response curve is obtained, which reflects the vibration response behavior of the laser under different working conditions. The resonance frequency response curve is phase-synchronized with the modulation signal to ensure that the working state of the laser always remains consistent with the external control signal. Through phase synchronization, the vibration resonance control parameters are obtained to reflect the correlation between the response characteristics of the laser and the modulation input. The vibration resonance control parameters are gain-adjusted. By adjusting the amplitude of the gain, a vibration resonance gain coefficient is generated, which is used to amplify the light injection signal. During the amplification process, the vibration resonance gain coefficient is used to optimize the power and dynamic characteristics of the light injection signal to generate a vibration resonance gain signal with significantly enhanced characteristics.

[0031] S3, performing Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculating the time-frequency conversion coefficient using fast Fourier transform, and establishing a signal nonlinear compensation model;

[0032] It should be noted that the vibration resonance gain signal is sampled to obtain its time domain random sequence, and the dynamic changes of the signal in the time domain are captured in real time by a high-speed sampling device, generating a set of time domain random sequence data that can accurately describe the signal amplitude and frequency distribution. The time domain random sequence is input into the Gaussian probability density function model, and the probability distribution of the original signal is gradually converted into a signal form that approximates the standard Gaussian distribution by finely adjusting the standard deviation parameter, generating a Gaussian distribution conversion signal. The conversion process can eliminate the unevenness of the probability distribution in the original signal. For the Gaussian distribution conversion signal, phase analysis is performed to extract the phase characteristics of the signal. By calculating the phase changes of the signal at different times, a set of accurate phase sampling sequences are obtained. These phase sampling points reflect the phase distribution characteristics of the signal in the time domain. After obtaining the initial phase sampling sequence, in order to improve the analysis accuracy, the phase sampling sequence is dynamically sampled, and the target phase sampling points are extracted by selecting the key change points of the signal. The selection of these sampling points is based on the dynamic characteristic changes of the signal, which can significantly reduce redundant information and improve the analysis efficiency. Perform fast Fourier transform on the target phase sampling point, convert it from time domain to frequency domain to obtain time-frequency domain mapping function, which describes the corresponding relationship between signal frequency component and time change. By comparing and analyzing with the ideal linear response characteristics, the nonlinear deviation coefficient of the signal is calculated, thereby revealing the nonlinear distortion characteristics of the signal generated during actual transmission or modulation, which directly reflects the degree of deviation of the signal from the linear ideal state. Based on the nonlinear distortion parameters, the signal compensation function is constructed by polynomial fitting method, and a compensation function that can effectively characterize the nonlinear distortion behavior is generated by multi-order polynomial fitting of the nonlinear deviation, and the corresponding compensation coefficient matrix is ​​calculated by this function. The matrix contains all the necessary parameters for correcting the nonlinear distortion of the signal and can be directly applied to the realization of signal compensation. The compensation coefficient matrix is ​​error optimized, and the actual output of the compensation function is compared with the ideal state by iteratively adjusting the error term, and an optimized signal nonlinear compensation model is generated.

[0033] S4, applying a driving current pulse synchronized with the communication data to the vertical cavity surface emitting laser according to the signal nonlinear compensation model, optimizing the amplitude and duty cycle of the driving current pulse, and realizing transient response control;

[0034] Specifically, based on the signal nonlinear compensation model, the bit timing information is extracted from the communication data, which is the time reference for the entire transient response control. By designing a clock extraction circuit, accurate timing information is parsed from the input communication data stream, and it is matched with the timing parameters of the pulse sequence to generate a synchronous control reference signal. Based on the synchronous control reference signal, the key characteristic parameters of the driving pulse, including the rate of change of the rising edge and the rate of change of the falling edge, are set by the waveform generator to generate an initial reference driving waveform. The reference driving waveform is subjected to amplitude optimization operation, and the amplitude optimization sequence is generated by analyzing the influence of the pulse amplitude on the transient response characteristics of the laser. The goal of amplitude optimization is to ensure that the pulse amplitude can trigger the response threshold of the laser to the greatest extent, while avoiding the thermal effect and energy waste caused by excessive amplitude. The amplitude optimization sequence is input into the duty cycle control circuit, and the duty cycle ratio of the pulse width and the pulse interval are accurately adjusted by using a digital timer to generate a driving current pulse sequence. This sequence can accurately match the timing of the communication data, and can fine-tune the transient response performance of the laser through duty cycle adjustment to meet the signal transmission requirements under different working conditions. The driving current pulse sequence is actually measured to obtain the transient response curve, and the characteristic parameters of the curve, such as rise time, fall time, peak power, etc., are analyzed to obtain a set of transient characteristic parameters. Through optimization processing, these transient characteristic parameters are adjusted to the optimal state to maximize the dynamic performance of the laser and ensure the quality and stability of the output optical signal. The control results generated by the optimization process are converted into optimized control parameters. The optimized control parameters are input into the waveform modulator, and the transient response control parameters are generated by dynamically adjusting the amplitude and duty cycle of the driving current pulse. This adjustment process needs to respond quickly to the dynamic changes of communication data at the hardware level to ensure that the driving signal can adapt to the transient response characteristics of the laser in real time. Based on the generated transient response control parameters, the driving current pulse is modulated in real time by a high-speed current source, and the modulated pulse signal is applied to the vertical cavity surface emitting laser. The driving signal is completely synchronized with the communication data, and has ideal amplitude and duty cycle characteristics after optimization, so that it can trigger the laser to achieve efficient optical signal output and obtain a transient response control signal.

[0035] S5, symmetrically sampling the output signal after transient response control at the rising edge and the falling edge, extracting the light intensity peak and timing characteristics using a high-speed photodetection array, and constructing a signal quality evaluation vector;

[0036] Among them, based on the dynamic characteristics of the transient response control signal, the key sampling point positions of the rising edge and the falling edge are determined. A clock distribution circuit is designed. By analyzing the timing characteristics of the transient response control signal, symmetrical sampling points are set near the rising edge and the falling edge of the signal, and a symmetrical sampling timing matrix is ​​formed. The transient response control signal is multi-way split by an optical splitter, and the original optical signal is split into multiple parallel signals to achieve parallel processing of the same signal. By inputting each parallel signal into an optoelectronic converter, the optical signal is converted into a corresponding electrical signal to generate a parallel photoelectric detection signal. The parallel photoelectric detection signal is synchronously sampled at the rising edge and the falling edge. By using a symmetrical sampling timing matrix to control the sampling time point, the amplitude change of the signal is captured at the key positions of the rising edge and the falling edge to form a set of high-precision sampling data points. After sampling, these sampling points are processed by a digital signal converter to generate a light intensity timing feature sequence. The light intensity timing feature sequence contains the light intensity amplitude and the corresponding time characteristics of each sampling point. After the light intensity timing feature sequence is generated, it is input into the peak detection circuit, and the amplitude of each sampling point is compared through a comparator array to accurately extract the peak data of the light intensity signal. By statistically analyzing the light intensity peak data, the light intensity peak statistical parameters describing the signal intensity distribution characteristics, such as the average peak value, the maximum peak value, the minimum peak value, and the standard deviation of the peak value, are obtained. At the same time, the rise time and fall time of the signal are calculated from the light intensity timing feature sequence. The rise time reflects the time required for the signal to jump from a low intensity state to a high intensity state, while the fall time describes the process of the signal decaying from a high intensity state to a low intensity state. These timing features reflect the dynamic edge characteristics of the signal and together with the light intensity peak data constitute the key characteristic parameters of the signal. The light intensity peak statistical parameters and the edge timing characteristics are data fused, and these parameters are integrated in the form of feature vectors to generate a signal quality evaluation vector containing rich information, which comprehensively reflects the light intensity characteristics and dynamic timing characteristics of the signal.

[0037] S6, inputting the signal quality evaluation vector into the support vector regression model, establishing a mapping relationship between the light intensity characteristic parameters and the drive control parameters, and generating a real-time control signal for the laser.

[0038] Specifically, the signal quality assessment vector is input into the support vector regression model, and its feature mapping capability is utilized to convert the signal quality assessment data in the high-dimensional feature space into driving control parameters that can characterize the dynamic behavior of the laser through a nonlinear kernel function. In this process, the support vector regression model obtains the mapping relationship between the light intensity characteristic parameters and the driving current amplitude through training, and outputs an amplitude control sequence. This sequence directly reflects the dynamic demand of the laser bias current. Based on the amplitude control sequence, the bias current modulation signal of the vertical cavity surface emitting laser is adjusted to ensure that the laser operates efficiently within the nonlinear characteristic range. A pulse width modulation waveform is generated by optimizing the duty cycle of the bias current modulation signal. The generation process of this waveform fully considers the transient response characteristics of the laser and the synchronization requirements of the communication data to ensure that the pulse width and period of the modulation signal can match the actual optical communication system requirements. The peak current of the pulse width modulation waveform is set to a preset multiple of the reference value, and the peak value is gain-amplified by the current amplifier to obtain a waveform with optimized peak characteristics, that is, a peak optimized waveform. After the peak optimized waveform is generated, in order to improve the dynamic response capability of the laser, the change rate of its rising and falling edges is finely controlled. This process is completed by the slope control circuit, generating a timing control waveform to describe the dynamic change characteristics of the laser drive signal. At the same time, the feedback data of the timing control waveform is used to compensate the transient response of the drive current through a closed-loop controller. The closed-loop controller adjusts the amplitude, timing and duty cycle of the drive signal by real-time monitoring the dynamic error in the feedback data to generate a steady-state compensation signal. The goal of generating a steady-state compensation signal is to eliminate the non-ideal optical signal output caused by insufficient transient response or dynamic error, thereby ensuring the working stability of the laser and the quality of the communication signal. The steady-state compensation signal is superimposed on the original drive current reference waveform, and a corrected drive current signal is generated through a current synthesizer. The corrected drive current waveform comprehensively considers multiple factors such as transient response, steady-state compensation and peak optimization, and can provide the optimal driving conditions for the laser. On this basis, in order to ensure that the drive signal is completely synchronized with the bit timing of the communication data, the phase-locked loop circuit is used to perform phase synchronization on the corrected drive waveform. The phase-locked loop circuit uses the timing information of the communication data to accurately adjust the phase of the drive signal so that it is synchronized with the bit of the data stream. Through the above multi-step optimization and synchronization processing, a real-time control signal for the laser is generated.

[0039] In one example, the output light intensity data of a vertical cavity surface emitting laser within a preset temperature range and a bias current range is obtained, and a light injection response signal and a self-mixing interference signal are respectively collected through an orthogonal polarization state light injection system and a self-mixing interference measurement system to determine a bistable working characteristic curve, including:

[0040] Inputting a temperature sequence within a preset temperature range and a bias current sequence within a preset current range into a vertical cavity surface emitting laser, and collecting an output optical signal through a photodetector;

[0041] The output optical signal is power-distributed, and the optical power of the first target value is input into the orthogonal polarization state light injection system through the optical splitter, and the optical power of the second target value is input into the self-mixing interferometer measurement system to obtain the split optical signal;

[0042] The output power of the injected light source of the orthogonal polarization state light injection system is adjusted to a preset power range, and the polarization state of the injected light is rotated by a polarization controller to obtain an injected light signal orthogonal to the output light of the vertical cavity surface emitting laser;

[0043] The injected light signal is input into the vertical cavity surface emitting laser through an optical circulator, and the light injection response signal of the output port of the optical circulator is collected, and the position of the reflector of the self-mixing interferometer measurement system is adjusted so that the reflected light signal interferes with the output light of the vertical cavity surface emitting laser through the optical fiber coupler to obtain a self-mixing interference signal;

[0044] Performing power scanning on the light injection response signal to obtain a bistable transition power threshold sequence, and performing phase analysis on the self-mixing interference signal to obtain a phase characteristic sequence of the bistable working area;

[0045] Based on the bistable transition power threshold sequence and the phase characteristic sequence of the bistable working area, the coefficient matrix of the bistable working characteristic curve is fitted to obtain the bistable working characteristic curve.

[0046] In this example, a temperature sequence of a preset temperature range and a bias current sequence of a preset current range are input into a vertical cavity surface emitting laser. Let the temperature sequence be , the bias current sequence is .in Indicates Temperature value, Indicates These parameters cover the typical operating range of the laser. By adjusting the temperature control module and the current source, these conditions are scanned point by point to capture the output optical signal of the laser under each combination. The output optical signal is collected by a photodetector, and its optical power is is a function of temperature and bias current and represents the optical output power of the laser under specific conditions. is a two-dimensional function:

[0047] ;

[0048] in is the photoelectric conversion efficiency of the laser, is the total input power injected into the laser. The output optical signal is divided into two parts by an optical splitter. is input into the orthogonal polarization light injection system, and the other part of the optical power is input into the self-mixing interferometry system. Assume that the splitting ratio is ,but and For example, if , the output optical signal is evenly distributed to the two systems. In the orthogonal polarization light injection system, the output power of the injected light source is adjusted to a preset range, denoted as The polarization state of the injected light is rotated by the polarization controller, and its polarization angle Described by the following formula:

[0049] ;

[0050] in is the polarized electric field vector of the injected light, Control the polarization state so that the polarization direction of the injected light is orthogonal to the polarization direction of the output light of the VCSEL. Re-input the injected light signal into the VCSEL through an optical circulator, and collect the light injection response signal from the output port of the optical circulator. This signal reflects the influence of the injected light power and polarization angle on the dynamic behavior of the laser. At the same time, in the self-mixing interferometry system, by adjusting the position Z of the reflector, the reflected light signal The output optical signal of the vertical cavity surface emitting laser Interference is generated by the fiber coupler, and the strength of the interference signal It is described by the following formula:

[0051] ;

[0052] in, is the electric field of the output optical signal, , is the reflection coefficient, is the wave vector. By adjusting the position of the reflector , analyze the phase change of the interference signal and obtain the phase characteristics of the self-mixing interference signal Combined with the power scanning process, the light injection response signal Perform power scans to record the transition point power threshold sequence of the vertical cavity surface emitting laser under different injection power conditions The phase characteristic sequence of the bistable working area is obtained by phase analysis of the self-mixing interference signal. By fitting the data of these two sequences, a bistable working characteristic curve is constructed. Assume that the function form of the characteristic curve is:

[0053] ;

[0054] in, , , , is the fitting coefficient. The coefficient matrix is ​​obtained by fitting using the least squares method:

[0055] ;

[0056] Finally, the bistable working characteristic curve is obtained .

[0057] In one example, based on a bistable working characteristic curve, the polarization direction and injection power of the light injection response signal are modulated, an all-optical switching effect is generated through an orthogonal polarization state light injection system, and a vibration resonance gain signal is obtained, including:

[0058] Based on the bistable working characteristic curve, the power threshold and phase difference of the bistable transition point are calculated to obtain the bistable modulation parameters;

[0059] Inputting the bistable modulation parameters into the orthogonal polarization state light injection system, and adjusting the polarization direction deflection angle of the injected light to a preset angle range through the polarization controller to obtain a polarization modulated light signal;

[0060] Scanning the injection power of the polarization modulated optical signal to obtain an injection power sequence, and injecting light into the vertical cavity surface emitting laser based on the injection power sequence to obtain all-optical switch response data;

[0061] Performing vibration resonance analysis on the all-optical switch response data to obtain a resonance frequency response curve, and performing phase synchronization between the resonance frequency response curve and the modulation signal to obtain a vibration resonance control parameter;

[0062] The vibration resonance control parameter is gain-adjusted to obtain a vibration resonance gain coefficient, and the light injection signal is amplified based on the vibration resonance gain coefficient to obtain a vibration resonance gain signal.

[0063] In this example, the power threshold and phase difference of the bistable transition point are calculated based on the bistable operating characteristic curve. Assume that the function form of the bistable operating characteristic curve is ,in represents the optical power, Indicates the phase, , , , is the fitting parameter. In order to determine the transition point, Perform the first-order derivative calculation, the derivative is

[0064] ;

[0065] By analyzing the slope change of the curve under different power conditions, the power threshold sequence of the transition point is found and the corresponding phase difference , these values ​​are used as bistable modulation parameters. The calculated bistable modulation parameters are input into the orthogonal polarization light injection system, and the polarization direction of the injected light is adjusted by the polarization controller to ensure the deflection angle of the injected light polarization direction Within the preset range. The polarization state of the injected light is expressed by the electric field vector It is expressed as:

[0066] ;

[0067] in is the injected optical power, is the polarization deflection angle. By adjusting and the injected optical power , generating a polarization modulated optical signal that meets the requirements of the bistable characteristics. The injection power of the polarization modulated optical signal Sweep to generate the injected power sequence These power values ​​cover the entire bistable operating range, and each injection power value corresponds to a dynamic response state of the laser. The optical signal is injected into the vertical cavity surface emitting laser and the output all-optical switch response data is recorded. is represented as the nonlinear response curve of the laser. After obtaining the all-optical switch response data, vibration resonance analysis is performed to extract the resonant frequency response characteristics of the system. Assuming that the output response of the system is , perform Fourier transform on it and obtain the resonance characteristics in the frequency domain:

[0068] ;

[0069] in Indicates frequency. The peak position of the system determines the resonant frequency . Resonance frequency response curve Describes the response intensity of the system under different frequency conditions. To ensure the phase consistency between light injection and system response, the resonant frequency response curve is phase-synchronized with the modulation signal to generate the vibration resonance control parameters. . Vibration resonance control parameters Perform gain adjustment to generate vibration resonance gain coefficient . Gain factor Is an amplification factor used to optimize the response characteristics of the signal. The amplitude of the injected signal is adjusted to a multiple of the original value using an amplifier:

[0070] ;

[0071] Through this amplification process, a vibration resonance gain signal is generated. The expression of this signal is:

[0072] ;

[0073] Its amplitude and dynamic characteristics can significantly enhance the response performance of the system after gain adjustment.

[0074] In one example, Gaussian distribution transformation and target phase sampling are performed on the vibration resonance gain signal, time-frequency conversion coefficients are calculated using fast Fourier transform, and a signal nonlinear compensation model is established, including:

[0075] The vibration resonance gain signal is sampled to obtain a time domain random sequence, and the time domain random sequence is input into a Gaussian probability density function, and the signal probability distribution is converted into a Gaussian distribution conversion signal by adjusting a standard deviation parameter;

[0076] Performing phase analysis on the Gaussian distribution conversion signal to obtain a phase sampling sequence, and dynamically sampling the phase sampling sequence to obtain a target phase sampling point;

[0077] Perform fast Fourier transform on the target phase sampling point to obtain the time-frequency domain mapping function, and compare the time-frequency domain mapping function with the ideal linear response characteristic and calculate the nonlinear deviation coefficient to obtain the nonlinear distortion parameter;

[0078] A compensation model is constructed based on nonlinear distortion parameters, a signal compensation function is established through polynomial fitting, a compensation coefficient matrix is ​​obtained, and the compensation coefficient matrix is ​​error optimized to obtain a signal nonlinear compensation model.

[0079] In this example, the vibration resonance gain signal Sampling to obtain a random sequence in the time domain ,in Indicates time, At the sampling time The signal value obtained. Sampling frequency The Nyquist sampling theorem must be satisfied, that is, ,in It is the highest frequency component of the signal, ensuring the integrity of the time domain signal. Input the time domain random sequence into the Gaussian probability density function , its mathematical form is:

[0080] ;

[0081] in is the mean of the signal, is the standard deviation, which controls the spread of the distribution. The value of , gradually approaches the probability distribution of the original signal to the standard Gaussian distribution (mean is zero, variance is one). This transformation eliminates the non-uniformity of the signal probability distribution, making the signal more suitable for subsequent analysis. After completing the Gaussian distribution transformation, the converted signal is subjected to phase analysis. Assume that the complex form of the Gaussian distribution signal is ,in is the signal amplitude, is the signal phase. Phase Calculated by the following formula:

[0082] ;

[0083] Through the above calculation, the phase sampling sequence of the signal is extracted , and select the target phase sampling points through dynamic sampling methods. For example, sampling points with large phase changes or obvious characteristics are selected to significantly reduce computational redundancy while retaining the core characteristics of the signal. Fast Fourier transform is performed on the target phase sampling points to convert them from the time domain to the frequency domain to obtain the time-frequency domain mapping function :

[0084] ;

[0085] in is the frequency, is the total number of sampling points, represents the first Points. Time-frequency domain mapping function Describes the distribution characteristics of the signal phase in the frequency domain. With the ideal linear response characteristics Compare and calculate the nonlinear deviation coefficient :

[0086] ;

[0087] in, Indicates the frequency The deviation coefficients reflect the difference between the signal and the ideal response. , the compensation model is constructed by polynomial fitting method. Assume that the compensation function is in the form of:

[0088] ;

[0089] in is the input signal, is the fitting coefficient. Through the least squares fitting method, the compensation coefficient matrix is ​​obtained :

[0090]

[0091] The goal of the fitting process is to make the compensated signal as close to the ideal linear response as possible. The compensation coefficient matrix is ​​error optimized and the fitting parameters are adjusted iteratively. , which will compensate for the output error of the model Minimize:

[0092] ;

[0093] in, is the compensated signal response, is an ideal response. Through error optimization, the signal nonlinear compensation model finally generated can effectively correct the nonlinear distortion of the system and improve the signal quality.

[0094] In one example, according to a signal nonlinear compensation model, a driving current pulse synchronized with communication data is applied to a vertical cavity surface emitting laser, and the amplitude and duty cycle of the driving current pulse are optimized to achieve transient response control, including:

[0095] Based on the signal nonlinear compensation model, the bit timing information is extracted from the communication data through the clock extraction circuit and the timing parameters of the pulse sequence are matched to obtain the synchronization control reference signal;

[0096] Based on the synchronous control reference signal, the change rate of the pulse rising edge and the change rate of the pulse falling edge are set by the waveform generator to obtain a reference driving waveform;

[0097] The reference driving waveform is amplitude optimized to obtain an amplitude optimization sequence, and the amplitude optimization sequence is input into a duty cycle control circuit, and the ratio of the pulse width duty cycle and the pulse interval are adjusted by a digital timer to obtain a driving current pulse sequence;

[0098] The transient response curve is measured based on the driving current pulse sequence to obtain transient characteristic parameters, and the transient characteristic parameters are optimized to obtain optimized control parameters;

[0099] The optimized control parameters are input into the waveform modulator to dynamically adjust the amplitude and duty cycle of the driving current pulse to obtain the transient response control parameters;

[0100] The driving current is modulated in real time based on the transient response control parameter, and a driving current pulse synchronized with the communication data is applied to the vertical cavity surface emitting laser through a high-speed current source to obtain a transient response control signal.

[0101] In this example, based on the signal nonlinear compensation model, the clock extraction circuit extracts the bit timing information from the communication data. The communication data is transmitted in the form of a binary bit stream. Suppose the communication data is ,in Indicates bits. The bit timing information is extracted from the communication data stream through the clock extraction circuit. This timing information is represented by the bit interval The process of extracting timing information is achieved by edge detection of the input data stream. satisfy The signal output by the clock extraction circuit is synchronized with the reference signal It is represented by a series of pulses, with the interval between pulses and the bit interval being Equal. Based on synchronous control reference signal , set the key characteristics of the drive pulse through the waveform generator, including the rate of change of the rising edge and the rate of change of the falling edge These parameters directly affect the shape of the pulse waveform, which in turn determines the dynamic response of the laser. Assume that the generated reference drive waveform is , its mathematical expression is:

[0102] ;

[0103] in, is the peak voltage of the drive pulse, and are the rise time and fall time of the pulse, is the pulse period. By adjusting and , controlling the steepness of the pulse, thereby optimizing the switching performance of the laser. Perform amplitude optimization and generate an amplitude optimization sequence by analyzing the impact of waveform amplitude on laser output performance ,in It is The goal of this step is to ensure that the amplitude of the drive pulse can trigger the dynamic response threshold of the laser, while avoiding energy consumption and thermal effects caused by excessive amplitude. The optimized amplitude sequence is input into the duty cycle control circuit, and the duty cycle ratio (duty cycle) of the pulse width and the pulse interval are precisely adjusted using a digital timer to generate a drive current pulse sequence. The expression of driving current is:

[0104] ;

[0105] in, is the peak value of the pulse current, is the duty cycle, is the pulse period. After generating the driving current pulse sequence, the transient response curve of the laser is measured experimentally to analyze its dynamic characteristics. Transient response curve Describes the change of the output intensity of the laser over time. Its key characteristics include rise time , Fall time and steady-state output light intensity . These parameters are calculated using the following formula:

[0106]

[0107] By analyzing these transient characteristic parameters, the dynamic characteristics of the drive pulse are optimized and the optimized control parameters are generated. ,in is the optimized pulse amplitude, The optimized control parameters are input into the waveform modulator to dynamically adjust the amplitude and duty cycle of the drive current pulse to generate the transient response control parameters. Based on these parameters, the drive current is modulated in real time by a high-speed current source, and the modulated drive current is applied to the vertical cavity surface emitting laser. The final output drive waveform Communication data Synchronization, its mathematical form is:

[0108] ;

[0109] in, It is a real-time modulation signal that matches the transient response control parameters.

[0110] In one example, the output signal after transient response control is sampled symmetrically at the rising and falling edges, and a high-speed photoelectric detection array is used to extract the light intensity peak and timing characteristics to construct a signal quality evaluation vector, including:

[0111] Based on the rising edge and falling edge of the transient response control signal, symmetrical sampling points are set through a clock distribution circuit to obtain a symmetrical sampling timing matrix;

[0112] The transient response control signal is divided into multiple parallel signals by an optical splitter, and each parallel signal is subjected to photoelectric conversion to obtain a parallel photoelectric detection signal;

[0113] The rising and falling edges of the parallel photoelectric detection signals are synchronously sampled and converted into digital signals according to the symmetrical sampling timing matrix to obtain a light intensity timing characteristic sequence;

[0114] The light intensity time series characteristic sequence is input into the peak detection circuit, and the amplitude of each sampling point is compared through the comparator array to obtain the light intensity peak data, and the light intensity peak data is statistically analyzed to obtain the light intensity peak statistical parameters;

[0115] The rise time and fall time of the signal are calculated based on the light intensity timing feature sequence to obtain the edge timing feature. The light intensity peak statistical parameters and edge timing features are fused to obtain the signal quality evaluation vector.

[0116] In this example, the clock distribution circuit sets symmetrical sampling points based on the rising and falling edges of the transient response control signal. Suppose the transient response control signal is , its changes in the time domain are manifested as a series of pulses. The rising and falling edge moments of each pulse are obtained through edge detection technology, and the specific formula is:

[0117] ;

[0118] in and Respectively represent The rising and falling edge times of a pulse, is the peak amplitude of the pulse. Based on these edge times, symmetrical sampling points are generated through the clock distribution circuit, so that the sampling points of each pulse are distributed at symmetrical positions on the rising and falling edges, and a symmetrical sampling timing matrix is ​​constructed. , whose element form is:

[0119] ;

[0120] in is the sampling interval, is the total number of pulses. The transient response control signal is Divided into multiple parallel signals, each signal is directed to an independent photodetector for photoelectric conversion to generate corresponding parallel photodetection signals ,in is the number of branches of the optical splitter. The expression of photoelectric conversion is:

[0121] ;

[0122] in It is The photocurrent of the signal, is the corresponding optical power, is the responsivity of the photodetector. For the rising and falling edges of the parallel photodetection signal, according to the symmetrical sampling timing matrix Perform synchronous sampling, extract the amplitude of each sampling point, and form a digital signal sequence. Through the digital signal conversion circuit, these sequences are integrated into a light intensity timing characteristic sequence. ,in The light intensity timing characteristic sequence is input into the peak detection circuit, and the amplitude of each sampling point is compared through the comparator array to extract the light intensity peak data. The function of the comparator array is to compare the light intensity values ​​point by point and record the time position and amplitude of the local maximum value. By performing statistical analysis on the light intensity peak data, the average value of the light intensity peak is calculated. , Standard Deviation and peak variation range , the formula is as follows:

[0123] ;

[0124] Based on the light intensity time series feature sequence , calculate the rise time of the signal and fall time The rise time indicates the time difference for the signal to grow from 10% peak value to 90% peak value, and the fall time indicates the time difference for the signal to decay from 90% peak value to 10% peak value. The expression is:

[0125] ;

[0126] The light intensity peak statistical parameters (such as , ) and edge timing characteristics (such as , ) to perform data fusion and form a signal quality assessment vector , which comprehensively reflects the light intensity characteristics and dynamic timing characteristics of the signal.

[0127] In one example, the signal quality evaluation vector is input into a support vector regression model, a mapping relationship between light intensity characteristic parameters and drive control parameters is established, and a real-time control signal for the laser is generated, including:

[0128] The signal quality evaluation vector is input into a support vector regression model, a corresponding amplitude control sequence is outputted through feature mapping calculation, and a bias current modulation signal of a vertical cavity surface emitting laser is adjusted based on the amplitude control sequence;

[0129] Optimizing the duty cycle of the bias current modulation signal to obtain a pulse width modulation waveform, setting the peak current of the pulse width modulation waveform to a preset multiple of a reference value, and outputting a gain modulation signal through a current amplifier to obtain a peak optimized waveform;

[0130] The rising edge and the falling edge of the peak optimization waveform are slope controlled to obtain a timing control waveform, and based on the feedback data of the timing control waveform, the transient response of the driving current is compensated by a closed-loop controller to obtain a steady-state compensation signal;

[0131] The steady-state compensation signal is superimposed on the driving current reference waveform, and the corrected driving current is output through the current synthesizer to obtain the driving control waveform. The driving control waveform is phase-synchronized and synchronized with the communication data bit through the phase-locked loop circuit to obtain the real-time control signal of the laser.

[0132] In this example, the signal quality assessment vector Enter the support vector regression model (SVR). Assume that the evaluation vector is in the form of ,in Indicates quality features, such as the mean, standard deviation, rise time, fall time, etc. of the peak light intensity. SVR uses the feature mapping function The input signal quality assessment vector is mapped from the low-dimensional feature space to the high-dimensional feature space to capture nonlinear characteristics. In the high-dimensional feature space, the output of the model is expressed as:

[0133] ;

[0134] in, is the weight of the support vector, is the bias, It is a kernel function, and the kernel function form includes radial basis kernel :

[0135] ;

[0136] By training the SVR model, the vector is evaluated based on the input signal quality. Output amplitude control sequence ,in Indicates A control amplitude is used to adjust the bias current of the laser. , dynamically adjust the bias current modulation signal of the vertical cavity surface emitting laser. Assume that the bias current modulation signal is , whose amplitude changes dynamically in different time periods according to the amplitude control sequence:

[0137] ;

[0138] in It is the boundary of the time segment, ensuring that each amplitude corresponds to a different modulation state. The duty cycle of the bias current modulation signal is optimized to generate a pulse width modulation (PWM) waveform. Pulse width modulation signal The duty cycle is defined as the pulse width The entire cycle Ratio:

[0139] ;

[0140] in is the on-time of the pulse. The optimized duty cycle The peak current of the optimized PWM waveform is determined by adjusting the amplitude control sequence and the frequency of the modulation signal. is set to a preset multiple of a baseline value, e.g. ,in is the magnification, is the reference current. The gain modulation signal is output through the current amplifier Finally, the peak optimized waveform is obtained. The slope of the rising and falling edges of the peak optimized waveform is controlled to improve the dynamic characteristics of the signal and generate a timing control waveform. Assume that the timing control waveform is , the slopes of its rising and falling edges are defined by the following formulas:

[0141] ;

[0142] in and are the rates of change of the rising and falling edges, and Based on the feedback data of the timing control waveform, the transient response of the drive current is compensated in real time through the closed-loop controller to generate a steady-state compensation signal The feedback data is the error between the output signal collected by the photodetector and the target signal. Decide:

[0143] ;

[0144] in, , , are the proportional, integral and differential gain coefficients. Reference waveform of driving current Superposition, output corrected drive current through current synthesizer :

[0145] ;

[0146] In order to ensure that the drive current waveform is synchronized with the communication data, a phase-locked loop circuit is used to achieve phase synchronization of the drive signal. Assume that the bit synchronization signal of the communication data is The phase-locked loop circuit adjusts the phase of the driving signal Make it Stay consistent:

[0147] ;

[0148] in It is the phase error, which is adjusted in real time through the phase-locked loop.

[0149] Reference Figure 2 , this embodiment provides a signal transmission control device based on optical communication, including:

[0150] Acquisition module 1 is used to acquire the output light intensity data of the vertical cavity surface emitting laser within a preset temperature range and bias current range, collect the light injection response signal and the self-mixing interference signal respectively through the orthogonal polarization state light injection system and the self-mixing interference measurement system, and determine the bistable working characteristic curve;

[0151] Modulation module 2, used to modulate the polarization direction and injection power of the light injection response signal based on the bistable working characteristic curve, generate an all-optical switching effect through an orthogonal polarization state light injection system, and obtain a vibration resonance gain signal;

[0152] Establishing module 3, for performing Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculating the time-frequency conversion coefficient by fast Fourier transform, and establishing a signal nonlinear compensation model;

[0153] The optimization module 4 is used to apply a driving current pulse synchronized with the communication data to the vertical cavity surface emitting laser according to the signal nonlinear compensation model, optimize the amplitude and duty cycle of the driving current pulse, and realize transient response control;

[0154] Extraction module 5, used for symmetrically sampling the output signal after transient response control at the rising edge and the falling edge, extracting the light intensity peak value and timing characteristics by using a high-speed photoelectric detection array, and constructing a signal quality evaluation vector;

[0155] The generating module 6 is used to input the signal quality evaluation vector into the support vector regression model, establish the mapping relationship between the light intensity characteristic parameters and the driving control parameters, and generate the laser real-time control signal.

[0156] In this embodiment, for the specific implementation of each unit in the above device embodiment, please refer to the above method embodiment, which will not be repeated here.

[0157] In a specific embodiment of the present invention, Figure 3 As shown, the specific structure of the signal transmitting laser includes an outer shell 31, a first flange positioning hole 32, a high-frequency component assembly hole 33, a lead component hole 34, a second flange positioning hole 35 and an optical fiber output hole 36.

[0158] The outer shell 31 is made of metal material and is in the shape of a long strip. The first flange positioning hole 32 and the second flange positioning hole 35 are respectively provided at both ends for fixing and installing the device. The interior of the outer shell 31 is designed with a special glue filling groove for filling thermal conductive glue to ensure the heat dissipation performance and stability of the device. The high-frequency component assembly hole 33 is located on one side of the outer shell 31 and is used to install high-frequency circuit components to realize the high-speed modulation function of the signal. The lead assembly holes 34 are linearly and evenly distributed and are used for the input and output connection of electrical signals. The optical fiber output hole 36 is set at the end of the outer shell 31 for fixing the optical fiber and transmitting the optical signal.

[0159] The chip bonding position of the signal emitting laser of the present invention is arranged near the high frequency component assembly hole 33, and is used to install and fix the vertical cavity surface emitting laser chip. The whole device adopts a parallel welding sealing surface design, combined with the precision processing of the outer shell 31, and realizes the airtight packaging of the device through a high-precision welding process.

[0160] The design and layout of the high-frequency component assembly hole 33 and the lead component hole 34 fully consider the transmission characteristics of the high-frequency signal, ensuring the integrity of the signal and the convenience of device assembly. The overall structure adopts a modular design, including core functional units such as lasers, drivers, DSP processing units, and optical path transceiver modules. These functional modules achieve efficient signal processing and transmission functions through the optimized layout inside the outer shell 31.

[0161] The signal transmitting laser of the present invention realizes efficient photoelectric conversion and signal modulation functions through scientific structural design and precise assembly process. The symmetrical design of the first flange positioning hole 32 and the second flange positioning hole 35 ensures the stability of device installation, the uniform distribution of the lead assembly hole 34 optimizes the transmission performance of the electrical signal, and the position design of the high-frequency component assembly hole 33 and the optical fiber output hole 36 ensures the efficiency of photoelectric signal conversion. This structural design not only meets the technical requirements of the high-speed optical communication system for signal transmitting devices, but also facilitates mass production and on-site maintenance.

[0162] An embodiment of the present invention further provides a signal transmitting laser, wherein the signal transmitting laser is used to implement the steps of any of the above methods.

[0163] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided by the present invention and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double-speed data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM.

[0164] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0165] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A signal transmission control method based on optical communication, characterized in that: The following steps are involved: The output light intensity data of the vertical cavity surface emitting laser within a preset temperature range and bias current range are obtained, and the light injection response signal and the self-mixing interference signal are respectively collected through an orthogonal polarization state light injection system and a self-mixing interference measurement system to determine a bistable working characteristic curve; Based on the bistable working characteristic curve, the polarization direction and injection power of the light injection response signal are modulated, and an all-optical switching effect is generated through the orthogonal polarization state light injection system to obtain a vibration resonance gain signal; Performing Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculating the time-frequency conversion coefficient using fast Fourier transform, and establishing a signal nonlinear compensation model; According to the signal nonlinear compensation model, applying a driving current pulse synchronized with the communication data to the vertical cavity surface emitting laser, optimizing the amplitude and duty cycle of the driving current pulse, and realizing transient response control; The output signal after transient response control is sampled symmetrically at the rising and falling edges, and the light intensity peak and timing characteristics are extracted using a high-speed photodetection array to construct a signal quality evaluation vector. The signal quality evaluation vector is input into a support vector regression model, a mapping relationship between light intensity characteristic parameters and drive control parameters is established, and a real-time control signal for the laser is generated.

2. The signal transmission control method based on optical communication according to claim 1, characterized in that: The method comprises: obtaining output light intensity data of a vertical cavity surface emitting laser within a preset temperature range and a bias current range, collecting a light injection response signal and a self-mixing interference signal respectively through an orthogonal polarization state light injection system and a self-mixing interference measurement system, and determining a bistable working characteristic curve, including: Inputting a temperature sequence within a preset temperature range and a bias current sequence within a preset current range into the vertical cavity surface emitting laser, and collecting an output optical signal through a photodetector; Performing power distribution on the output optical signal, inputting the optical power of the first target value into the orthogonal polarization state light injection system through an optical splitter, and inputting the optical power of the second target value into the self-mixing interference measurement system to obtain a split optical signal; The output power of the injected light source of the orthogonal polarization state light injection system is adjusted to a preset power range, and the polarization state of the injected light is rotated by a polarization controller to obtain an injected light signal orthogonal to the output light of the vertical cavity surface emitting laser; The injected light signal is input into the vertical cavity surface emitting laser through an optical circulator, and a light injection response signal of an output port in the optical circulator is collected, and the position of a reflector of the self-mixing interferometer measurement system is adjusted so that the reflected light signal interferes with the output light of the vertical cavity surface emitting laser through a fiber coupler to obtain a self-mixing interference signal; Performing power scanning on the light injection response signal to obtain a bistable transition power threshold sequence, and performing phase analysis on the self-mixing interference signal to obtain a phase characteristic sequence of a bistable working area; Based on the bistable transition power threshold sequence and the phase characteristic sequence of the bistable working area, a coefficient matrix of the bistable working characteristic curve is fitted to obtain the bistable working characteristic curve.

3. The signal transmission control method based on optical communication according to claim 2, characterized in that: The method of modulating the polarization direction and injection power of the light injection response signal based on the bistable working characteristic curve, generating an all-optical switching effect through the orthogonal polarization state light injection system, and obtaining a vibration resonance gain signal includes: Based on the bistable working characteristic curve, the power threshold and phase difference of the bistable transition point are calculated to obtain the bistable modulation parameters; The bistable modulation parameters are input into the orthogonal polarization state light injection system, and the polarization direction deflection angle of the injected light is adjusted to a preset angle range by a polarization controller to obtain a polarization modulated light signal; Scanning the injection power of the polarization modulated optical signal to obtain an injection power sequence, and injecting light into the vertical cavity surface emitting laser based on the injection power sequence to obtain all-optical switch response data; Performing vibration resonance analysis on the all-optical switch response data to obtain a resonance frequency response curve, and performing phase synchronization on the resonance frequency response curve and a modulation signal to obtain a vibration resonance control parameter; The vibration resonance control parameter is gain-adjusted to obtain a vibration resonance gain coefficient, and the light injection signal is amplified based on the vibration resonance gain coefficient to obtain a vibration resonance gain signal.

4. The signal transmission control method based on optical communication according to claim 3, characterized in that: The step of performing Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculating the time-frequency conversion coefficient using fast Fourier transform, and establishing a signal nonlinear compensation model includes: Sampling the vibration resonance gain signal to obtain a time domain random sequence, and inputting the time domain random sequence into a Gaussian probability density function, and converting the signal probability distribution into a Gaussian distribution conversion signal by adjusting a standard deviation parameter; Performing phase analysis on the Gaussian distribution conversion signal to obtain a phase sampling sequence, and dynamically sampling the phase sampling sequence to obtain a target phase sampling point; Performing a fast Fourier transform on the target phase sampling point to obtain a time-frequency domain mapping function, and comparing the time-frequency domain mapping function with an ideal linear response characteristic and calculating a nonlinear deviation coefficient to obtain a nonlinear distortion parameter; A compensation model is constructed based on the nonlinear distortion parameters, a signal compensation function is established through polynomial fitting to obtain a compensation coefficient matrix, and error optimization is performed on the compensation coefficient matrix to obtain a signal nonlinear compensation model.

5. The signal transmission control method based on optical communication according to claim 4, characterized in that: The method of applying a driving current pulse synchronized with communication data to the vertical cavity surface emitting laser according to the signal nonlinear compensation model, optimizing the amplitude and duty cycle of the driving current pulse, and realizing transient response control includes: Based on the signal nonlinear compensation model, the bit timing information is extracted from the communication data through the clock extraction circuit and the timing parameters of the pulse sequence are matched to obtain a synchronous control reference signal; Based on the synchronous control reference signal, the change rate of the pulse rising edge and the change rate of the pulse falling edge are set by a waveform generator to obtain a reference driving waveform; The reference driving waveform is amplitude optimized to obtain an amplitude optimization sequence, and the amplitude optimization sequence is input into a duty cycle control circuit, and the ratio of the pulse width duty cycle and the pulse interval are adjusted by a digital timer to obtain a driving current pulse sequence; Measuring a transient response curve based on the driving current pulse sequence to obtain transient characteristic parameters, and optimizing the transient characteristic parameters to obtain optimized control parameters; Inputting the optimized control parameters into a waveform modulator, dynamically adjusting the amplitude and duty cycle of the driving current pulse, and obtaining transient response control parameters; The driving current is modulated in real time based on the transient response control parameter, and a driving current pulse synchronized with the communication data is applied to the vertical cavity surface emitting laser through a high-speed current source to obtain a transient response control signal.

6. The signal transmission control method based on optical communication according to claim 5, characterized in that: The output signal after transient response control is symmetrically sampled at the rising edge and the falling edge, and a high-speed photoelectric detection array is used to extract the light intensity peak value and timing characteristics to construct a signal quality evaluation vector, including: Based on the rising edge and falling edge of the transient response control signal, symmetrical sampling points are set through a clock distribution circuit to obtain a symmetrical sampling timing matrix; The transient response control signal is divided into multiple parallel signals by an optical splitter, and each parallel signal is subjected to photoelectric conversion to obtain parallel photoelectric detection signals; Performing synchronous sampling and digital signal conversion on the rising edge and the falling edge of the parallel photoelectric detection signal according to the symmetrical sampling timing matrix to obtain a light intensity timing characteristic sequence; Inputting the light intensity time series characteristic sequence into a peak detection circuit, comparing the amplitude of each sampling point through a comparator array to obtain light intensity peak data, and performing statistical analysis on the light intensity peak data to obtain light intensity peak statistical parameters; The rise time and fall time of the signal are calculated based on the light intensity timing feature sequence to obtain the edge timing feature, and the light intensity peak statistical parameters and the edge timing feature are data fused to obtain a signal quality evaluation vector.

7. The signal transmission control method based on optical communication according to claim 6, characterized in that: The step of inputting the signal quality evaluation vector into a support vector regression model, establishing a mapping relationship between light intensity characteristic parameters and drive control parameters, and generating a laser real-time control signal includes: Inputting the signal quality assessment vector into a support vector regression model, outputting a corresponding amplitude control sequence through feature mapping calculation, and adjusting the bias current modulation signal of the vertical cavity surface emitting laser based on the amplitude control sequence; Optimizing the duty cycle of the bias current modulation signal to obtain a pulse width modulation waveform, setting the peak current of the pulse width modulation waveform to a preset multiple of a reference value, and outputting a gain modulation signal through a current amplifier to obtain a peak optimized waveform; Performing slope control on the rising edge and the falling edge of the peak optimization waveform to obtain a timing control waveform, and based on feedback data of the timing control waveform, compensating for the transient response of the driving current through a closed-loop controller to obtain a steady-state compensation signal; The steady-state compensation signal is superimposed on the driving current reference waveform, and the corrected driving current is output through the current synthesizer to obtain the driving control waveform, and the driving control waveform is phase-synchronized and synchronized with the communication data bit through the phase-locked loop circuit to obtain the laser real-time control signal.

8. A signal transmission control device based on optical communication, characterized in that: For implementing the steps of the method according to any one of claims 1 to 7, the device comprises: An acquisition module is used to acquire the output light intensity data of the vertical cavity surface emitting laser within a preset temperature range and a bias current range, collect the light injection response signal and the self-mixing interference signal respectively through an orthogonal polarization state light injection system and a self-mixing interference measurement system, and determine a bistable working characteristic curve; A modulation module, used to modulate the polarization direction and injection power of the light injection response signal based on the bistable working characteristic curve, generate an all-optical switching effect through the orthogonal polarization state light injection system, and obtain a vibration resonance gain signal; Establishing a module, used to perform Gaussian distribution transformation and target phase sampling on the vibration resonance gain signal, calculate the time-frequency conversion coefficient by fast Fourier transform, and establish a signal nonlinear compensation model; an optimization module, configured to apply a driving current pulse synchronized with the communication data to the vertical cavity surface emitting laser according to the signal nonlinear compensation model, optimize the amplitude and duty cycle of the driving current pulse, and realize transient response control; An extraction module is used to perform symmetrical sampling on the rising and falling edges of the output signal after transient response control, extract the light intensity peak value and timing characteristics using a high-speed photoelectric detection array, and construct a signal quality evaluation vector; The generation module is used to input the signal quality evaluation vector into a support vector regression model, establish a mapping relationship between light intensity characteristic parameters and drive control parameters, and generate a real-time control signal for the laser.

9. A signal transmitting laser, characterized in that: The signal transmitting laser is used to implement the steps of the method according to any one of claims 1 to 7.

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