A laser wavelength fast locking and power modulation method based on feedforward compensation

Abstract

This invention provides a method for fast laser wavelength locking and power modulation based on feedforward compensation, relating to the technical field of laser wavelength modulation technology. The method includes: parallel monitoring of laser state information; generating a compensation signal based on the state information; fusing and allocating the compensation signal to obtain a composite control signal; and adjusting the laser wavelength based on the composite control signal. This invention solves the problem of low laser modulation accuracy, thereby improving laser modulation accuracy.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of laser wavelength modulation, and more specifically, to a method for fast laser wavelength locking and power modulation based on feedforward compensation. Background Technology

[0002] Semiconductor lasers, especially distributed feedback (DFB) lasers or distributed Bragg reflection (DBR) lasers, have been widely used in optical communication, fiber optic sensing, lidar (LiDAR), gas detection and atomic physics due to their advantages such as compact structure, high electro-optical conversion efficiency and tunable output wavelength.

[0003] However, the output wavelength of a laser is highly susceptible to interference from changes in the external environment and internal operating conditions. These interferences originate from different physical mechanisms, have wide spectral distributions, and are mutually coupled, making high-precision wavelength locking a very challenging technical problem. Specifically, wavelength instability mainly stems from the following aspects: First, temperature drift, including slow changes in ambient temperature and thermal effects caused by changes in the injected current during laser operation. This leads to changes in the refractive index and grating period of the laser material, causing slow but considerable wavelength drift. Second, mechanical vibration and acoustic noise, particularly prominent in mobile platform applications such as automotive and airborne systems. External mechanical vibrations are transmitted to the laser chip through the packaging structure, causing dynamic changes in internal stress and resulting in mid-to-high frequency wavelength jitter. Finally, electrical disturbances. On the one hand, to achieve data transmission or sensing functions, the laser injection current needs to be modulated at high speed. This deterministic, large-amplitude current change directly induces severe wavelength chirp and thermal drift. On the other hand, random noise such as white noise and power frequency interference inherent in the current drive source itself can also be converted into minute wavelength jitter.

[0004] Existing wavelength control schemes typically employ a single control strategy, making it difficult to address disturbances from multiple sources and with different characteristics. For example, slow feedback loops based on thermoelectric coolers (TECs) can effectively compensate for gradually changing ambient temperature drift, but their response bandwidth (usually below tens of hertz) is far from sufficient to suppress wavelength jitter caused by mechanical vibrations or high-speed current modulation at hundreds or even thousands of hertz. Meanwhile, some feedforward schemes designed to compensate for current modulation effects often neglect other key disturbance sources such as mechanical vibrations.

[0005] There is currently no good solution to the above problems. Summary of the Invention

[0006] This invention provides a method for fast wavelength locking and power modulation of lasers based on feedforward compensation, which at least solves the problem of low wavelength modulation accuracy in related technologies.

[0007] According to an embodiment of the present invention, a method for fast wavelength locking and power modulation of a laser based on feedforward compensation is provided, comprising:

[0008] Parallel monitoring of laser status information, wherein the status information includes at least laser thermal status information, vibration status information, and electrical status information;

[0009] A compensation signal is generated based on the state information, wherein the compensation signal includes a thermal compensation signal, a dynamic compensation signal, a first electro-induced compensation signal, and a second electro-induced compensation signal;

[0010] The compensation signal is fused and distributed to obtain a composite control signal;

[0011] The wavelength of the laser is adjusted based on the composite control signal.

[0012] In one exemplary embodiment, generating the compensation signal based on the state information includes:

[0013] The real-time wavelength information output by the laser and the real-time temperature information of the laser are obtained, wherein the thermal state information includes the real-time wavelength information and the real-time temperature information;

[0014] The real-time wavelength information is compared with a preset wavelength reference to obtain the wavelength deviation;

[0015] A thermal compensation signal is generated based on the wavelength deviation and the real-time temperature information.

[0016] In one exemplary embodiment, generating the compensation signal based on the state information includes:

[0017] Real-time vibration acceleration is acquired, and the vibration state information includes the real-time vibration acceleration.

[0018] The vibration compensation signal is determined based on the real-time vibration acceleration.

[0019] In one exemplary embodiment, generating the compensation signal based on the state information includes:

[0020] Acquire the injection current information and current noise information of the laser, wherein the electrical status information includes the injection current information and current noise information;

[0021] Based on the injected current information, a first electro-compensation signal is generated;

[0022] Based on the current noise information, a second electro-compensation signal is generated.

[0023] In an exemplary embodiment, the step of fusing and allocating the compensation signal to obtain a composite control signal includes:

[0024] The thermal compensation signal and the first electro-induced compensation signal are fused into a first composite control signal;

[0025] The vibration compensation signal and the second electro-compensation signal are fused into a second composite control signal, which includes the first composite control signal and the second composite control signal.

[0026] According to another embodiment of the present invention, a laser wavelength fast locking and power modulation system based on feedforward compensation is provided, comprising:

[0027] A status monitoring module is used to monitor the status information of the laser in parallel, wherein the status information includes at least the laser's thermal status information, vibration status information, and electrical status information;

[0028] A compensation signal module is used to generate a compensation signal based on the state information, wherein the compensation signal includes a thermal compensation signal, a dynamic compensation signal, a first electro-induced compensation signal, and a second electro-induced compensation signal;

[0029] A fusion module is used to perform fusion and distribution processing on the compensation signal to obtain a composite control signal;

[0030] An adjustment module is used to adjust the wavelength of the laser based on the composite control signal.

[0031] In one exemplary embodiment, generating the compensation signal based on the state information includes:

[0032] The real-time wavelength information output by the laser and the real-time temperature information of the laser are obtained, wherein the thermal state information includes the real-time wavelength information and the real-time temperature information;

[0033] The real-time wavelength information is compared with a preset wavelength reference to obtain the wavelength deviation;

[0034] A thermal compensation signal is generated based on the wavelength deviation and the real-time temperature information.

[0035] In one exemplary embodiment, generating the compensation signal based on the state information includes:

[0036] Real-time vibration acceleration is acquired, and the vibration state information includes the real-time vibration acceleration.

[0037] The vibration compensation signal is determined based on the real-time vibration acceleration.

[0038] In one exemplary embodiment, generating the compensation signal based on the state information includes:

[0039] Acquire the injection current information and current noise information of the laser, wherein the electrical status information includes the injection current information and current noise information;

[0040] Based on the injected current information, a first electro-compensation signal is generated;

[0041] Based on the current noise information, a second electro-compensation signal is generated.

[0042] According to yet another embodiment of the present invention, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to perform the steps in any of the above method embodiments when executed.

[0043] This invention achieves rapid modulation of laser by real-time monitoring of parameters such as temperature, vibration, and current, and by performing corresponding feedforward compensation based on the monitoring results. Therefore, it can solve the problem of low modulation accuracy and improve the modulation accuracy. Attached Figure Description

[0044] Figure 1 This is a flowchart of a laser wavelength fast locking and power modulation method based on feedforward compensation according to an embodiment of the present invention;

[0045] Figure 2 This is a structural block diagram of a laser wavelength fast locking and power modulation system based on feedforward compensation according to an embodiment of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0047] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0048] Furthermore, in this application, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and may change accordingly depending on the orientation of the components in the accompanying drawings.

[0049] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission.

[0050] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0051] This embodiment provides a method for fast laser wavelength locking and power modulation based on feedforward compensation. Figure 1 This is a flowchart of a laser wavelength fast locking and power modulation method based on feedforward compensation according to an embodiment of the present invention, as follows: Figure 1 As shown, the process includes the following steps:

[0052] Step S11: Construct a disturbance compensation channel;

[0053] In this embodiment, the output power of the laser is affected by the surrounding environment, such as ambient temperature, vibration, and noise from the input current. Therefore, adjusting the power to eliminate these environmental disturbances can effectively ensure that the output laser meets the requirements.

[0054] Specifically, for environmental disturbances, the corresponding disturbance amount is determined according to the following steps, and a corresponding compensation channel is constructed:

[0055] Step S111: Construct a thermal drift compensation channel. The thermal drift compensation channel uses a PID controller to adjust for disturbances caused by ambient temperature. Specifically, the laser system is placed in a stable environment (other compensation channels are temporarily disabled), and the integral and derivative coefficients in the PID controller are zeroed. Then, starting from a small value, the proportional coefficient is gradually increased. At each proportional coefficient, a small step (e.g., +5 pm) is applied to the wavelength setpoint, and the response of the wavelength meter reading is observed. The proportional coefficient is then continuously increased until the wavelength response begins to oscillate with constant amplitude and continuity. The proportional coefficient at this point is the critical gain, and the period of oscillation is measured with an oscilloscope or data acquisition card and recorded as the critical period. This yields the PID parameters. These parameters are then stored in the DSP for subsequent calculations.

[0056] Step S112: Construct an vibration-induced drift compensation channel. This channel uses accelerometer signals for feedforward compensation to confirm the drift effect of mechanical vibration on the wavelength. Specifically, the entire laser module (including the accelerometer) is securely mounted on a triaxial electromagnetic vibration table, while the laser operates under a stable DC bias. Slow thermal feedback is used to lock its wavelength at the target value to eliminate temperature drift interference. This requires applying a sweep frequency vibration signal to the laser using the vibration table at a high sampling rate (e.g., 10). The kSPS (k-speed pulse-splitter) synchronously acquires the Z-axis acceleration time-domain signal from the accelerometer and the wavelength time-domain signal from the high-resolution wavelength meter. The acquired two long-term data sequences are then processed. Specifically, the wavelength time-domain signal is high-pass filtered to extract the wavelength drift component caused by vibration. The Z-axis acceleration time-domain signal and the wavelength drift component are then segmented, and a Hanning window is applied to each segment followed by a Fast Fourier Transform (FFT) to obtain their respective frequency domain spectra. The transfer function is then calculated based on the frequency domain spectra to determine the amplitude-frequency and phase-frequency characteristics of the vibration response. Finally, the calculated transfer function is converted into a digital filter to predict the corresponding wavelength drift based on the real-time acceleration input. The transfer function can be... ,in, For function values, It is the frequency domain value corresponding to the wavelength shift component caused by vibration. It is the frequency domain signal corresponding to the Z-axis acceleration time domain signal.

[0057] Step S113: Construct an electro-drift compensation channel. In actual use, the heat and noise generated by the current will affect the wavelength, so it is necessary to judge these two electrical disturbances separately.

[0058] Specifically, regarding the electrothermal effect, it is necessary to address the equivalent thermal effect of the high-speed modulation current on the laser. This involves applying a series of digitally modulated square wave signals with different amplitudes and duty cycles (e.g., amplitude varying from 10mA to 50mA) at multiple operating bias points, and then restabilizing the wavelength through a slow feedback loop of the TEC (Transient Electrothermal Reactor). Simultaneously, the required temperature (or voltage) adjustment for the TEC is recorded. Then, the relationship between these data points and the adjustment is fitted to obtain a nonlinear electrothermal effect model.

[0059] For current noise, the current driver is connected to a dummy load and a high-precision current probe, and the output noise spectral density is measured with a dynamic signal analyzer (spectrum analyzer) at different output currents. The corresponding spectral features (e.g., frequency, amplitude and phase, or the power spectral density function of the substrate) are extracted and stored as a noise model.

[0060] Step S12: Parallel monitoring of the laser's status information, wherein the status information includes at least the laser's thermal status information, vibration status information, and electrical status information;

[0061] In this embodiment, the status information is monitored in real time by corresponding sensors so that the corresponding compensation amount can be determined in a timely manner based on the turntable information, and the wavelength can be modulated according to the compensation amount in the future.

[0062] Specifically, including:

[0063] Thermal status monitoring: The voltage of the NTC thermistor tightly coupled to the laser housing is read at a rate of 100 Hz through a 24-bit high-precision ADC, and the ADC reading is converted into a high-resolution temperature value in real time. At the same time, the output of the wavelength meter is read at a rate of 1 kHz through a high-speed serial port or parallel interface to obtain the real-time wavelength.

[0064] Vibration status monitoring: The digital output of the triaxial MEMS accelerometer is synchronously read via the SPI bus at a sampling rate of 10 kHz. In order to ensure the real-time performance of data acquisition, direct memory access (DMA) is usually used to directly transfer the accelerometer data block to the RAM memory of the DSP to obtain the real-time vibration acceleration vector, thereby minimizing CPU interrupt overhead.

[0065] Electrical state monitoring and decomposition: The total current injected into the laser is sampled at a preset rate using a broadband current probe or a sampling resistor connected in series with the main current path. Since the sampled raw data stream contains DC bias, deterministic modulation signal and random noise, it can be separated by an adaptive noise canceller based on the least mean square algorithm to obtain the random noise component and the deterministic modulation component.

[0066] Step S13: Generate a compensation signal based on the state information;

[0067] In this embodiment, the compensation signals are calculated in parallel by independent logic modules; specifically:

[0068] For the thermal drift compensation channel: first calculate the wavelength deviation, and then use the wavelength deviation and real-time temperature value as inputs to calculate the thermal compensation signal. This compensation signal is used to drive the TEC slow feedback loop to cool and adjust the offset wavelength to the target value.

[0069] For the vibration-induced drift compensation channel: acquire the latest accelerometer sample containing real-time vibration acceleration and use it as the input to the aforementioned filter to obtain the predicted vibration-induced wavelength drift; then generate an inverse current compensation signal (i.e., vibration compensation signal) based on the fast tuning coefficient of the injected current to the wavelength (e.g., -2 pm / mA, which needs to be pre-calibrated). For example, if the predicted drift is +0.5 pm, the compensation current is -0.25 mA, and so on.

[0070] For electro-drift compensation channels:

[0071] On the one hand, the key parameters of the separated deterministic modulation components (such as amplitude, duty cycle, etc.) are substituted into the aforementioned nonlinear electrothermal effect model to calculate the required compensation voltage, which is the first electroinduced compensation signal. It should be noted that this calculation can be performed at a lower frequency (e.g., synchronized with the symbol rate of the modulation signal).

[0072] On the other hand, an anti-noise generator is set up according to the aforementioned noise model. Then, based on the aforementioned random noise components and combined with the noise model, an anti-noise current signal of equal magnitude and opposite phase is generated. This anti-noise current signal is the second electro-compensation signal. In particular, the spectral shape of the anti-noise signal can be optimized by using a digital filter to achieve the best cancellation effect.

[0073] Step S14: Perform fusion and allocation processing on the compensation signal to obtain a composite control signal;

[0074] In this embodiment, the multiple compensation signals with different spectral characteristics generated above are distributed to the actuator for fusion matching through a preset intelligent fusion strategy to generate a control signal for controlling wavelength power.

[0075] Specifically, in the low-frequency channel, the thermal compensation signal and the electrothermal compensation signal are superimposed after passing through a low-pass filter by a slow TEC actuator to form the final TEC control signal; while in the high-frequency channel, the vibration compensation signal is superimposed after passing through a high-pass filter by a fast injection current actuator to form the final injection current compensation signal. This frequency domain allocation strategy ensures that each actuator only handles the compensation task within its capacity, avoiding the ineffective behavior of slow actuators attempting to respond to fast signals, as well as the problem of fast actuators being saturated by low-frequency signals, thus maximizing control efficiency.

[0076] S15: Adjust the wavelength of the laser based on the composite control signal.

[0077] In this embodiment, adjustment is performed based on a composite control signal to ensure that the output laser meets the requirements.

[0078] Specifically, the calculated composite TEC control voltage is first output to the TEC driver through a high-precision 16-bit DAC. The driver must be a low-noise, high-stability linear power amplifier to ensure that the control voltage can be accurately converted into the DC or slowly varying current required to drive the TEC, thereby enabling precise thermal control of the laser.

[0079] The digital waveform of the composite compensation current is then arithmetically superimposed with the digital waveform of the main modulation signal. The final digital waveform is then fed into the high-speed DAC and the aforementioned high-performance current driver to form the total current injected into the laser. The laser then outputs the corresponding laser based on this current. In this way, slow drift is precisely compensated by the slow actuator (TEC), and fast jitter is canceled in real time by the fast actuator (injected current). Furthermore, a smooth transition is achieved in the responsibility handover region, ultimately realizing comprehensive and efficient suppression of multi-source, broadband disturbances.

[0080] It should be noted that the bandwidth of the current driver used to superimpose the fast compensation signal must be much larger than the highest disturbance frequency to be compensated. For example, to compensate for a 2 kHz vibration, its -3dB bandwidth should be at least 20 kHz. At the same time, its output noise floor must be much lower than the noise level to be compensated to ensure that the compensation process does not introduce noise that is more severe than the original noise. The frequencies of the low-pass and high-pass filters need to ensure that the phase response of the two channels is consistent at the preset frequency, and the sum of the amplitude response is 0 dB, so as to avoid the dip or bulge of the control gain near the junction frequency and ensure smooth and seamless compensation across the entire spectrum.

[0081] In addition, this application uses a compensation channel to predict the effects of temperature, vibration, and current on the laser in advance, thereby achieving rapid wavelength locking and performing corresponding compensation based on the prediction results, thus achieving adaptive power modulation and effectively improving modulation efficiency and accuracy.

[0082] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0083] This embodiment also provides a laser wavelength fast locking and power modulation system based on feedforward compensation. This system is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0084] Figure 2 This is a structural block diagram of a laser wavelength fast locking and power modulation system based on feedforward compensation according to an embodiment of the present invention, as shown below. Figure 2 As shown, the system includes:

[0085] The status monitoring module 21 is used to monitor the status information of the laser in parallel, wherein the status information includes at least the laser's thermal status information, vibration status information and electrical status information;

[0086] Compensation signal module 22 is used to generate a compensation signal based on the state information;

[0087] The fusion module 23 is used to perform fusion and distribution processing on the compensation signal to obtain a composite control signal;

[0088] The adjustment module 24 is used to adjust the wavelength of the laser based on the composite control signal.

[0089] In an optional embodiment, generating the compensation signal based on the state information includes:

[0090] The real-time wavelength information output by the laser and the real-time temperature information of the laser are obtained, wherein the thermal state information includes the real-time wavelength information and the real-time temperature information;

[0091] The real-time wavelength information is compared with a preset wavelength reference to obtain the wavelength deviation;

[0092] A thermal compensation signal is generated based on the wavelength deviation and the real-time temperature information.

[0093] In an optional embodiment, generating the compensation signal based on the state information includes:

[0094] Real-time vibration acceleration is acquired, and the vibration state information includes the real-time vibration acceleration.

[0095] The vibration compensation signal is determined based on the real-time vibration acceleration.

[0096] In an optional embodiment, generating the compensation signal based on the state information includes:

[0097] Acquire the injection current information and current noise information of the laser, wherein the electrical status information includes the injection current information and current noise information;

[0098] Based on the injected current information, a first electro-compensation signal is generated;

[0099] Based on the current noise information, a second electro-compensation signal is generated.

[0100] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0101] Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, wherein the computer program is configured to perform the steps in any of the above method embodiments when executed.

[0102] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard disk, magnetic disk, or optical disk.

[0103] Embodiments of the present invention also provide an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0104] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0105] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0107] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0108] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0109] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for fast wavelength locking and power modulation of a laser based on feedforward compensation, characterized in that, include: Parallel monitoring of laser status information, wherein the status information includes at least laser thermal status information, vibration status information, and electrical status information; Generate a compensation signal based on the state information, wherein the compensation signal includes a thermal compensation signal, a dynamic compensation signal, a first electro-induced compensation signal, and a second electro-induced compensation signal; the generation of the compensation signal based on the state information includes: acquiring real-time vibration acceleration, wherein the vibration state information includes the real-time vibration acceleration; determining a vibration compensation signal based on the real-time vibration acceleration; acquiring the injection current information and current noise information of the laser, wherein the electrical state information includes the injection current information and current noise information; generating a first electro-induced compensation signal based on the injection current information; and generating a second electro-induced compensation signal based on the current noise information. The compensation signal is fused and distributed to obtain a composite control signal; The wavelength of the laser is adjusted based on the composite control signal; The step of fusing and allocating the compensation signal to obtain the composite control signal includes: In the low-frequency channel, the thermal compensation signal and the first electro-compensation signal are fused into a first composite control signal by a slow TEC actuator; In the high-frequency channel, the vibration compensation signal and the second electro-compensation signal are fused into a second composite control signal by a fast-injection current actuator. The composite control signal includes the first composite control signal and the second composite control signal.

2. The method according to claim 1, characterized in that, The generation of the compensation signal based on the state information includes: The real-time wavelength information output by the laser and the real-time temperature information of the laser are obtained, wherein the thermal state information includes the real-time wavelength information and the real-time temperature information; The real-time wavelength information is compared with a preset wavelength reference to obtain the wavelength deviation; A thermal compensation signal is generated based on the wavelength deviation and the real-time temperature information.

3. A laser wavelength fast locking and power modulation system based on feedforward compensation, characterized in that, include: A status monitoring module is used to monitor the status information of the laser in parallel, wherein the status information includes at least the laser's thermal status information, vibration status information, and electrical status information; A compensation signal module is used to generate compensation signals based on the state information, wherein the compensation signals include a thermal compensation signal, a dynamic compensation signal, a first electro-induced compensation signal, and a second electro-induced compensation signal; generating compensation signals based on the state information includes: acquiring real-time vibration acceleration, wherein the vibration state information includes the real-time vibration acceleration; determining a vibration compensation signal based on the real-time vibration acceleration; acquiring injection current information and current noise information of the laser, wherein the electrical state information includes the injection current information and current noise information; generating a first electro-induced compensation signal based on the injection current information; and generating a second electro-induced compensation signal based on the current noise information. A fusion module is used to perform fusion and distribution processing on the compensation signal to obtain a composite control signal; An adjustment module is used to adjust the wavelength of the laser based on the composite control signal; The step of fusing and allocating the compensation signal to obtain the composite control signal includes: In the low-frequency channel, the thermal compensation signal and the first electro-compensation signal are fused into a first composite control signal; In the high-frequency channel, the vibration compensation signal and the second electro-compensation signal are fused into a second composite control signal, which includes the first composite control signal and the second composite control signal.

4. The system according to claim 3, characterized in that, The generation of the compensation signal based on the state information includes: The real-time wavelength information output by the laser and the real-time temperature information of the laser are obtained, wherein the thermal state information includes the real-time wavelength information and the real-time temperature information; The real-time wavelength information is compared with a preset wavelength reference to obtain the wavelength deviation; A thermal compensation signal is generated based on the wavelength deviation and the real-time temperature information.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein the computer program is configured to perform the method described in any one of claims 1 to 2 when executed.

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