Laser acousto-optic modulation driving system, acousto-optic driver and acousto-optic driving method

Abstract

The application relates to the field of laser technology, in particular to a laser acousto-optic modulation driving system, an acousto-optic driver and an acousto-optic driving method. The system comprises a waveform editing board, a power supply main control board, an acousto-optic driver and an acousto-optic modulator. The acousto-optic driver comprises a digital signal input interface, an analog signal input interface and a modulation waveform synthesis unit. The waveform editing board is connected with the digital signal input interface and is used for outputting a digital synchronization signal, wherein the digital synchronization signal is used for representing time sequence information of a modulation waveform. The power supply main control board is connected with the analog signal input interface and is used for outputting an analog amplitude signal, wherein the analog amplitude signal is used for representing amplitude information of the modulation waveform. The modulation waveform synthesis unit is connected with the digital signal input interface and the analog signal input interface respectively, is used for synthesizing a modulation waveform locally according to the time sequence information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and outputs a radio frequency signal to the acousto-optic modulator, so as to realize modulation on laser.

Description

Technical Field

[0001] This invention relates to the field of laser technology, and in particular to a laser acousto-optic modulation driving system, an acousto-optic driver, and an acousto-optic driving method. Background Technology

[0002] In the field of ultrafast laser precision machining, the laser repetition frequency (PRF) is one of the core indicators for measuring machining efficiency and quality. The performance of the acousto-optic modulator (AOM) driving circuit directly determines the highest operating repetition rate and pulse output quality that a high repetition rate free trigger (FT) mode laser can achieve.

[0003] Existing acousto-optic modulation drive circuits for high-repetition-rate (RF) Fourier transform lasers commonly exhibit problems such as incomplete modulation signal edge establishment and significant loss of control over the pulse-on-duty-rate (POD) signal duty cycle when the RF exceeds 5 MHz. This leads to severe distortion of the output waveform and even complete ineffective modulation, indicating a persistent ceiling on the RF. Furthermore, the modulation signal is affected by various factors during transmission, resulting in a sharp increase in phase jitter with increasing RF, significant deterioration in pulse edge velocity and pulse width accuracy, and a substantial decrease in pulse energy consistency, making it difficult to meet the energy stability requirements of precision machining.

[0004] Furthermore, the signal used to control the modulation amplitude (i.e., the MIA modulation input signal) and the digital signal used to control the turn-off and modulation timing (i.e., the OFF turn-off signal) come from different functional boards. The phase coordination between the two is difficult to control precisely. Under high repetition rate conditions, the proportion of this deviation to the cycle increases rapidly, which can easily lead to incomplete turn-off, and there is a risk of light leakage and abnormal output power, affecting the reliability of the system.

[0005] To address the aforementioned issues, existing improvement methods primarily rely on performance upgrades of devices such as digital-to-analog converters (DACs) and operational amplifiers. These methods offer limited improvement in the upper limit of the repetition rate, and some solutions suffer from high costs and poor compatibility with existing mass-produced platforms. Consequently, they fail to simultaneously meet the combined demands for higher repetition rates, superior pulse quality, and low modification costs. Summary of the Invention

[0006] This invention discloses a laser acousto-optic modulation driving system, an acousto-optic driver, and an acousto-optic driving method, aiming to solve the technical problems existing in the prior art. The invention adopts the following technical solution: On one hand, embodiments of the present invention provide a laser acousto-optic modulation driving system, including a waveform editing board, a power control board, an acousto-optic driver, and an acousto-optic modulator; the acousto-optic driver includes a digital signal input interface, an analog signal input interface, and a modulation waveform synthesis unit; The waveform editing board is connected to the digital signal input interface to output a digital synchronization signal, which is used to characterize the timing information of the modulated waveform. The power supply main control board is connected to the analog signal input interface to output analog amplitude signals, which are used to characterize the amplitude information of the modulated waveform. The modulation waveform synthesis unit is connected to both the digital signal input interface and the analog signal input interface. It is used to synthesize the modulation waveform locally based on the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and output the radio frequency signal to the acousto-optic modulator to achieve the modulation of the laser.

[0007] As a preferred technical solution, the waveform editing board includes a programmable logic device, which is used to generate and output a digital synchronization signal, which is a digital square wave signal.

[0008] As a preferred technical solution, the analog amplitude signal is a DC level signal and does not carry the timing information of the modulation waveform.

[0009] As a preferred technical solution, when the analog amplitude signal is at a preset shutdown level, the acousto-optic driver controls the shutdown of the radio frequency signal output to achieve shutdown control of the acousto-optic modulator. When the analog amplitude signal is at the preset working level, the modulation waveform synthesis unit synthesizes the modulation waveform according to the digital synchronization signal to drive the acousto-optic modulator to perform modulation.

[0010] As a preferred technical solution, the signal transmission path between the digital signal input interface and the waveform editing board, and the signal transmission path between the analog signal input interface and the power control board are set according to a preset path length relationship, so as to control the phase difference between the digital synchronization signal and the analog amplitude signal within a preset range.

[0011] As a preferred technical solution, the acousto-optic driver also includes a mode switching unit, which is used to switch the acousto-optic driver between a local synthesis mode and a preset single-channel analog input mode. In single-channel analog input mode, the acousto-optic driver drives the acousto-optic modulator according to the externally input analog modulation signal. The analog modulation signal carries both timing information and amplitude information to be compatible with the traditional single-channel analog input method.

[0012] Secondly, embodiments of the present invention provide an acousto-optic driver, including a digital signal input interface, an analog signal input interface, and a modulation waveform synthesis unit; The digital signal input interface is used to receive externally input digital synchronization signals, which are used to characterize the timing information of the modulated waveform; The analog signal input interface is used to receive externally input analog amplitude signals, which are used to characterize the amplitude information of the modulated waveform; The modulation waveform synthesis unit is connected to both the digital signal input interface and the analog signal input interface. It is used to synthesize the modulation waveform locally based on the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and output the radio frequency signal to drive the acousto-optic modulator to modulate the laser.

[0013] As a preferred technical solution, when the analog amplitude signal is at a preset shutdown level, the acousto-optic driver controls the shutdown of the radio frequency signal output to achieve shutdown control of the acousto-optic modulator. When the analog amplitude signal is at the preset working level, the modulation waveform synthesis unit synthesizes the modulation waveform according to the digital synchronization signal to drive the acousto-optic modulator to perform modulation.

[0014] As a preferred technical solution, the digital signal input interface and the analog signal input interface have a preset response delay matching relationship to control the phase difference between the digital synchronization signal and the analog amplitude signal within a preset range.

[0015] As a preferred technical solution, it also includes a mode switching unit, which is used to switch the acousto-optic driver between a local synthesis mode and a preset single-channel analog input mode; In single-channel analog input mode, the acousto-optic driver drives the acousto-optic modulator according to the externally input analog modulation signal. The analog modulation signal carries both timing information and amplitude information to be compatible with the traditional single-channel analog input method.

[0016] Thirdly, embodiments of the present invention provide an acousto-optic modulation driving method, applied to an acousto-optic driver as described in any of the preceding claims, comprising: Receive digital synchronization signals and determine the timing information of the modulation waveform based on the digital synchronization signals; Receive analog amplitude signals and determine the amplitude information of the modulation waveform based on the analog amplitude signals; Based on timing and amplitude information, a modulation waveform is synthesized locally and an radio frequency signal is output to drive an acousto-optic modulator to modulate the laser.

[0017] As a preferred technical solution, the following are also included: Stop receiving digital synchronization signals or set the analog amplitude signal to a preset shutdown level to turn off the output of the radio frequency signal, thereby achieving shutdown control of the acousto-optic modulator.

[0018] As a preferred technical solution, the following are also included: In response to a mode switching command, it switches between the local synthesis mode and the preset single analog input mode; In single-channel analog input mode, the acousto-optic modulator is driven by the externally input analog modulation signal. The analog modulation signal carries both timing and amplitude information to be compatible with the traditional single-channel analog input method.

[0019] One embodiment of the above invention has the following advantages or beneficial effects: This invention achieves the following technical effects by reconstructing the traditional single-channel analog input architecture into a solution where digital synchronization signals and analog amplitude signals are input separately, and the modulation waveform is locally synthesized by an acousto-optic driver: Since the digital synchronization signal received by the digital signal input interface only carries the timing information of the modulation waveform, it is naturally adapted to high-speed transmission scenarios and is not subject to the inherent bandwidth limitations of analog circuits. Therefore, the highest stable repetition frequency achieved by this invention is an order of magnitude higher than that of the traditional single-channel analog input architecture, increasing the highest stable repetition frequency from 2.5MHz to 10MHz. This breaks through the inherent bandwidth bottleneck of analog signal synthesis and transmission in the traditional architecture. Its performance improvement far exceeds the limit that can be achieved by simply upgrading the device, fully demonstrating the technical value brought about by innovation at the architectural level.

[0020] Furthermore, since the modulation waveform synthesis unit synthesizes timing and amplitude information locally within the acousto-optic driver, it avoids the signal quality degradation problem caused by long-distance transmission of the modulation signal in traditional architectures. Under high repetition rate conditions, the pulse edge steepness, pulse width accuracy, and pulse energy consistency of this invention are significantly improved, and phase jitter is greatly reduced, thereby effectively ensuring the pulse output quality and processing stability in high repetition rate processing scenarios. At the same time, since the digital synchronization signal transmitted by the digital signal input interface has strong anti-interference capability, and the analog amplitude signal transmitted by the analog signal input interface is only at DC level and is not limited by bandwidth, the two signals are not coupled or interfered with each other during transmission. The overall anti-interference capability and transmission stability of this invention are also correspondingly enhanced, making it more adaptable to complex industrial field application environments.

[0021] Furthermore, by multiplexing the analog amplitude signal as a turn-off control signal for the acousto-optic modulator, i.e., when the analog amplitude signal is at a preset turn-off level, the acousto-optic driver controls the RF signal output to be turned off. This invention can reliably turn off the light output without adding a dedicated shutter control circuit, reducing the complexity of the system structure. Moreover, since the digital synchronization signal and the analog amplitude signal are synthesized in a unified manner in terms of timing and amplitude within the acousto-optic driver, the phase coordination between the two is more controllable. This effectively solves the phase deviation problem caused by different signal source boards in the traditional architecture, significantly improves the turn-off reliability, and eliminates the risks of light leakage and abnormal output power.

[0022] Furthermore, by incorporating a mode switching unit within the acousto-optic driver, this invention enables the driver to switch between a local synthesis mode and a single-channel analog input mode compatible with traditional signal formats. This significantly improves performance while ensuring compatibility with different generations of acousto-optic drivers and low-repetition-rate application scenarios. Upgrades can be completed without large-scale modifications to existing hardware platforms, resulting in low modification costs and short implementation cycles. New and old devices can share the same hardware platform, thereby enhancing the product's competitiveness in the high-end market while effectively reducing production and maintenance costs. This invention has significant potential for widespread application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is a structural block diagram of a single-path analog architecture disclosed in the prior art; Figure 2 This is a schematic diagram of signal transmission in a single-channel analog architecture disclosed in the prior art; Figure 3 This is a structural block diagram of a laser acousto-optic modulation driving system disclosed in one embodiment of the present invention; Figure 4 This is a schematic diagram of the signal transmission of a laser acousto-optic modulation driving system disclosed in one embodiment of the present invention; Figure 5 The output pulse waveform of a conventional single-channel analog architecture disclosed in the prior art under a 10MHz repetition rate condition; Figure 6 The output pulse waveform of the laser acousto-optic modulation driving system disclosed in one embodiment of the present invention under a 10MHz repetition rate condition; Figure 7This is a schematic diagram illustrating the timing coordination relationship between the digital synchronization signal, the analog amplitude signal, the modulation waveform, and the optical output in one embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0026] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] With the continuous development of ultrafast laser precision machining technology, the laser repetition frequency (PRF), as a core indicator for measuring machining efficiency and quality, has its achievable upper limit directly constrained by the performance of the acousto-optic modulator (AOM) driving circuit. Existing high-repetition-rate free-triggered (FT) mode lasers typically use an acousto-optic Q-driver (Q-driver) to receive the analog pulse duty cycle modulation (POD) signal and drive the RF power circuit output, thereby driving the AOM to modulate the laser.

[0028] like Figure 1As shown, in the existing single-channel analog architecture, the power supply main control board integrates an analog POD synthesis circuit. The analog POD signal synthesized by this circuit (timing + amplitude integration) simultaneously carries the timing and amplitude information of the modulated waveform. After transmission, this synthesized signal drives the RF power circuit, which in turn drives the acousto-optic modulator to output laser pulses with the corresponding repetition rate. The location marked by the red dashed line in the figure is the bandwidth bottleneck in the existing architecture, specifically distributed at the analog POD signal synthesis node and on the critical path of its transmission to the RF power circuit. The signal establishment speed and transmission quality at this point are limited by the inherent bandwidth of the relevant circuit devices, which is the core factor restricting the improvement of the repetition rate of the existing architecture. When the repetition rate requirement increases to above 5MHz, this architecture exposes several performance bottlenecks that are difficult to overcome.

[0029] First, the edge setup speed of analog POD modulated signals is limited by multiple factors, including the digital-to-analog converter (DAC) conversion setup time, the operational amplifier slew rate and unity-gain bandwidth, and the parasitic parameters of the printed circuit board (PCB) traces. This presents a clear physical upper limit, which is precisely why... Figure 1 The specific causes of the bandwidth bottleneck are indicated in the text. Taking a typical configuration of a 12-bit DAC and a 100MHz bandwidth operational amplifier as an example, the DAC settling time is about 8ns, and the op-amp slew rate is about 500V / μs. For a full-range output of 0-5V, the theoretical fastest rise time is about 10ns. Adding the actual effects of PCB parasitic parameters and transmission line losses, the final rise time is usually around 12-15ns. When the operating repetition frequency is 2.5MHz, the single cycle is about 400ns, and the rise time accounts for only about 3% of the single cycle, allowing the signal to be established and modulated normally. However, when the repetition frequency is increased to 10MHz, the single cycle is shortened to only 100ns, and the rise time of about 12ns accounts for as much as 12% of the single cycle. The signal edge has not yet been established before entering the falling edge stage, resulting in severe distortion of the output waveform, complete loss of duty cycle control, and inability to achieve effective modulation of the AOM. In existing technologies, by simply replacing the DAC and op-amp devices with faster ones, the upper limit of the repetition frequency can be increased to about 4MHz at most, and it can never break through the 10MHz level. The repetition frequency has a physical ceiling that is difficult to overcome by simply upgrading the devices.

[0030] Secondly, the path for analog POD signals to be transmitted from the autonomous control board to the Q-drive is relatively long, making it susceptible to interference from electromagnetic environments and other factors. This leads to a significant deterioration in signal transmission quality as the repetition rate increases, with phase jitter showing a sharp increase with frequency. At a repetition rate of 2.5MHz, the phase jitter is approximately 1.2ns, which is a small proportion of a single cycle and has limited impact on pulse consistency. However, when the repetition rate is increased to 10MHz, the proportion of phase jitter in the cycle increases significantly due to the substantial shortening of the single cycle. Consequently, pulse energy consistency deteriorates severely, and the amplitude of single-pulse energy fluctuations can rapidly worsen from a few percent at lower repetition rates to over ten percent or even higher. Pulse edge time and pulse width accuracy also degrade significantly, making it difficult to meet the stringent requirements of precision machining for pulse stability and consistency.

[0031] Furthermore, the analog input signal used to set the modulation amplitude and the digital signal used to control the shutdown and modulation timing usually come from different functional boards, and their transmission path lengths are different, making it difficult to precisely control the phase difference between them. For example... Figure 2 As shown in the diagram, in the existing architecture, the POD circuit inside the power supply main control board receives the externally input 0-5V amplitude input signal and the OFF signal (marked as OFF, i.e., digital turn-off signal) from the waveform editing board, and combines them into an analog POD signal that simultaneously carries the 0-5V amplitude and OFF timing. This signal is then output to the acousto-optic Q-drive, which in turn outputs an RF output signal to drive the acousto-optic modulator (AOM) for optical modulation. This architecture shows that although the amplitude and timing information are ultimately synthesized within the power supply main control board, the external input signal used to set the amplitude reference and the turn-off signal from the waveform editing board still belong to different signal sources and transmission paths. The timing of their arrival at the power supply main control board is difficult to precisely align. Under low repetition rate conditions, this phase deviation accounts for a small proportion of the cycle and has limited impact on system operation. However, under high repetition rate conditions, due to the significantly shortened single cycle, the proportion of the phase deviation increases sharply, easily leading to problems such as incomplete turn-off and modulation failure. This results in quality and safety risks such as laser leakage and abnormal output power, seriously affecting the reliability of system operation.

[0032] Furthermore, existing performance improvement methods are mainly limited to upgrading the performance of related electronic components such as DACs and operational amplifiers. Such improvements are constrained by… Figure 1The inherent physical characteristics of the bandwidth bottleneck mean that the improvement in the upper repetition rate (PRR) limit is very limited, typically only raising it to around 4MHz, which is insufficient to achieve a breakthrough of orders of magnitude and cannot meet the high PRR requirements of applications above 5MHz. While other solutions, such as using high-speed dedicated modulation chips, can help improve PRR capabilities to some extent, they generally suffer from significantly increased costs and poor compatibility with existing mass-produced hardware platforms, making it difficult to achieve a smooth upgrade while retaining the existing equipment foundation, resulting in low overall cost-effectiveness. These intertwined problems mean that current technologies have not fundamentally solved the core issues of analog bandwidth bottlenecks, poor pulse consistency, and low shutdown reliability in high PRR application scenarios, thus hindering the further development of ultrafast laser equipment towards higher PRRs.

[0033] refer to Figure 3 , Figure 4 To address the problems existing in the prior art, this invention provides a laser acousto-optic modulation driving system, including a waveform editing board 110, a power control board 120, an acousto-optic driver 130, and an acousto-optic modulator 140. The acousto-optic driver 130 includes a digital signal input interface 131, an analog signal input interface 132, and a modulation waveform synthesis unit 133. The waveform editing board 110 is connected to the digital signal input interface 131 and outputs a digital synchronization signal, which characterizes the timing information of the modulation waveform. The power control board 120 is connected to the analog signal input interface 132 and outputs an analog amplitude signal, which characterizes the amplitude information of the modulation waveform. The modulation waveform synthesis unit 133 is connected to both the digital signal input interface 131 and the analog signal input interface 132, and locally synthesizes the modulation waveform based on the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and outputs a radio frequency signal to the acousto-optic modulator 140 to achieve laser modulation.

[0034] Compared to existing single-channel analog architectures, this invention separates the timing and amplitude information, originally integrated into a single analog signal, into two independently transmitted signals: a digital synchronization signal and an analog amplitude signal. The acousto-optic driver 130 locally synthesizes the modulated waveform, thus eliminating the inherent bandwidth limitations of analog signal synthesis and transmission at the architectural level. This significantly increases the highest stable repetition rate (RF) supported by the system, breaking through the RF ceiling that is difficult to overcome by simply upgrading components in existing technologies. Simultaneously, because the digital synchronization signal has steep edges and strong anti-interference capabilities, and the analog amplitude signal only needs to transmit DC levels and no longer carries timing information susceptible to transmission quality issues, the pulse consistency and phase stability under high RF conditions are also significantly improved in this invention. Furthermore, since the timing and amplitude information are synthesized synchronously within the acousto-optic driver 130, the phase coordination between them is more easily controlled, which helps improve the reliability of shutdown and reduce the risk of light leakage and power anomalies.

[0035] To visually demonstrate the differences between the embodiments of the present invention and existing technologies in terms of output pulse waveform quality under high repetition rate conditions, such as Figure 5 , Figure 6 As shown, the two figures compare the output pulse waveforms of a traditional single-channel analog architecture and the architecture of this invention under a 10MHz repetition rate condition. Figure 5 It is evident that, under a 10MHz repetition rate, the traditional single-channel analog architecture suffers from insufficient edge setup time for the analog POD signal within a single cycle. The output pulse rise time is approximately 12ns, and the pulse waveform exhibits significant oscillations and distortion. Multiple fluctuations appear at the top and edges of the waveform, failing to form a complete and flat pulse plateau. This indicates that under this repetition rate condition, the analog signal cannot effectively establish itself, and both the duty cycle and amplitude are out of control, making it difficult to meet the pulse energy consistency requirements of precision machining. Figure 6 As can be seen, the architecture provided by the embodiments of the present invention, under the same 10MHz repetition rate condition, has a shortened output pulse rise time of approximately 3ns, a steep pulse edge, and a complete and flat waveform without oscillation or distortion. This indicates that after the digital synchronization signal and the analog amplitude signal are locally synthesized by the acousto-optic driver 130, they can still maintain good waveform setup capability and duty cycle accuracy under high repetition rate conditions. Figure 5 , Figure 6 As can be seen from the waveform comparison shown, the embodiments of the present invention fundamentally overcome the waveform distortion problem of traditional single-channel analog architecture in high repetition rate scenarios by decoupling the transmission of timing information and amplitude information and synthesizing it locally, significantly improving the pulse edge steepness and waveform integrity, thereby providing a strong guarantee for the pulse energy consistency and processing quality in high repetition rate processing scenarios.

[0036] In a preferred embodiment, the waveform editing board 110 includes a programmable logic device (FPGA), which generates and outputs a digital synchronization signal (OFF signal), which is a digital square wave signal. Specifically, the FPGA directly outputs this digital synchronization signal through a general purpose input / output (GPIO) port, serving as the synchronization trigger clock and shutdown control reference for the modulation waveform synthesis within the acousto-optic driver 130. This digital square wave signal has steep edges and strong anti-interference capabilities, supporting distortion-free transmission under high repetition rates above 10MHz, thus naturally adapting to high repetition rate applications and avoiding waveform distortion problems caused by incomplete edge establishment in traditional analog signals at high repetition rates. Furthermore, the waveform editing board 110 can flexibly configure parameters such as the repetition rate and pulse width corresponding to the digital synchronization signal through cooperation with host computer software to adapt to different laser processing requirements.

[0037] In a preferred embodiment, the analog amplitude signal is a DC level signal (ON signal) and does not carry timing information of the modulated waveform. Specifically, the analog amplitude signal can be output by the digital-to-analog converter in the power supply main control board 120, and is a pure DC analog level of 0-5V, used only to set the modulation depth and output optical power amplitude of the acousto-optic modulator 140. Since this signal maintains a constant level and does not undergo high-frequency jumps under stable operating conditions, it is not limited by the inherent bandwidth of analog circuits such as the slew rate of the operational amplifier and the unity-gain bandwidth. During transmission, there will be no signal distortion or waveform distortion problems caused by insufficient edge setup speed, thus ensuring the stability and accuracy of amplitude information transmission. The level of this analog amplitude signal corresponds to the output optical power of the acousto-optic modulator 140, and the output power can be precisely set and controlled through pre-calibration.

[0038] In a preferred embodiment, the acousto-optic driver 130 is the core module of the architecture in this embodiment of the invention. It integrates a digital signal input interface 131, a modulation waveform synthesis unit 133, an analog signal input interface 132, and a radio frequency power circuit 134. The digital signal input interface 131 receives the digital synchronization signal output from the waveform editing board 110, and the analog signal input interface 132 receives the analog amplitude signal output from the power control board 120. The modulation waveform synthesis unit 133 is connected to both the digital signal input interface 131 and the analog signal input interface 132. It synthesizes the modulation waveform locally within the acousto-optic driver 130 based on the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal (the amplitude of the modulation waveform is determined by the analog amplitude signal, and the timing is determined by the digital synchronization signal). This eliminates the need for external circuitry to pre-synthesize the complete modulation signal, thereby avoiding quality degradation of the modulation signal due to bandwidth limitations and electromagnetic interference during long-distance transmission. The modulation waveform synthesized by the modulation waveform synthesis unit 133 is used to drive the radio frequency power circuit 134. The radio frequency power circuit 134 outputs radio frequency signals, which in turn drive the acousto-optic modulator 140 to modulate the laser and control its radio frequency output and optical modulation state.

[0039] In a preferred embodiment, the acousto-optic modulator 140 is the optical modulation actuator in this invention. Its radio frequency (RF) signal input terminal is connected to the RF power circuit 134 of the acousto-optic driver 130. It is used to perform acousto-optic modulation on the incident laser according to the received RF signal, thereby outputting a laser pulse that corresponds to the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal. Since the RF signal output by the acousto-optic driver 130 is driven by the modulation waveform obtained after local synthesis of timing and amplitude information, it has the characteristics of steep edges and stable phase. Therefore, the acousto-optic modulator 140 can maintain good modulation accuracy and output stability even under high repetition rate conditions, achieving laser pulse output with corresponding repetition rate and power, meeting the requirements for pulse quality and consistency in ultrafast laser precision machining scenarios.

[0040] In a preferred embodiment of the present invention, the hardware wiring logic between the components is as follows: The programmable logic device in the waveform editing board 110 generates the digital synchronization signal through its output port and transmits it to the digital signal input interface 131 of the acoustic-optical driver 130 via a shielded twisted pair cable. This transmission path has strong anti-interference capability and can ensure that the digital synchronization signal maintains a steep edge and no obvious distortion transmission quality under long-distance transmission conditions.

[0041] The analog-to-digital converter in the power supply main control board 120 outputs the analog amplitude signal, which is transmitted to the analog signal input interface 132 of the acoustic-optical driver 130 via a shielded wire. Since the analog amplitude signal is a DC level signal and does not carry the timing information of the modulation waveform, its transmission process is not limited by the inherent bandwidth of the analog circuit, which can ensure the stability and accuracy of amplitude information transmission.

[0042] The modulation waveform synthesis unit 133 inside the acousto-optic driver 130 synthesizes a modulation waveform locally based on the digital synchronization signal received from the digital signal input interface 131 and the analog amplitude signal received from the analog signal input interface 132, and drives the radio frequency power circuit 134 to output a radio frequency signal; the radio frequency signal is transmitted to the radio frequency signal input terminal of the acousto-optic modulator 140 through a coaxial cable to drive the acousto-optic modulator 140 to modulate the laser.

[0043] In addition, the acousto-optic driver 130 retains the original wiring terminals for receiving analog modulation signals from external input. These analog modulation signals carry both timing and amplitude information. The acousto-optic driver 130 is equipped with a mode switching unit. Through hardware jumpers, the acousto-optic driver 130 can be switched between local synthesis mode and single-channel analog input mode. In single-channel analog input mode, the acousto-optic driver 130 drives the acousto-optic modulator 140 according to the analog modulation signal, thereby achieving compatibility with the traditional single-channel analog input method. This allows the system provided by the present invention to be adapted to acousto-optic modulators 140 of different generations and application scenarios with different repetition rate requirements.

[0044] In a preferred embodiment, when the analog amplitude signal is at a preset shutdown level, the acousto-optic driver 130 controls the shutdown of the radio frequency signal output to achieve shutdown control of the acousto-optic modulator 140; when the analog amplitude signal is at a preset operating level, the modulation waveform synthesis unit 133 performs modulation waveform synthesis according to the digital synchronization signal to drive the acousto-optic modulator 140 to perform modulation.

[0045] Specifically, the preset shutdown level is 0. That is, when the analog amplitude signal is 0, the acousto-optic driver 130 determines that it is currently in a shutdown state and controls the RF signal output to be turned off, so that the acousto-optic modulator 140 no longer modulates the incident laser, thus achieving complete shutdown of the light output. When the analog amplitude signal is a preset operating level greater than 0, the level value is used to set the modulation depth and output optical power amplitude of the acousto-optic modulator 140. The acousto-optic driver 130, based on the timing information determined by the digital synchronization signal received by the digital signal input interface 131 and combined with the amplitude information determined by the current analog amplitude signal, synthesizes the corresponding modulation waveform locally by the modulation waveform synthesis unit 133, thereby driving the RF power circuit 134 to output the RF signal, so as to drive the acousto-optic modulator 140 to achieve optical modulation of the corresponding repetition rate and power.

[0046] With the above configuration, the analog amplitude signal not only performs the function of setting amplitude information, but also has the function of controlling the shutdown of the acousto-optic modulator 140. That is, the analog amplitude signal is multiplexed as a shutter control signal. When it is at the preset shutdown level, it achieves complete optical shutdown. When it is at the preset working level, it is used for high-speed modulation in conjunction with the digital synchronization signal. Therefore, there is no need to add a dedicated shutter control line to the system. Reliable control of the output state of the acousto-optic modulator 140 can be achieved. While simplifying the system hardware structure, it also improves the coordination efficiency between the shutdown function and the modulation function.

[0047] In a preferred embodiment, the signal transmission path between the digital signal input interface 131 and the waveform editing board 110, and the signal transmission path between the analog signal input interface 132 and the power control board 120 are set according to a preset path length relationship, so as to control the phase difference between the digital synchronization signal and the analog amplitude signal within a preset range.

[0048] Specifically, since the digital synchronization signal and the analog amplitude signal originate from two different functional boards, the waveform editing board 110 and the power control board 120, respectively, if they arrive at the acousto-optic driver 130 along their respective independent transmission paths, unpredictable phase deviations can easily occur due to the inconsistent transmission path lengths. Furthermore, the proportion of this phase deviation in a single pulse cycle increases with the repetition rate, thereby affecting the timing accuracy of the modulated waveform synthesis and the reliability of the shutdown. To address this issue, this embodiment pre-designs and matches the transmission path lengths between the digital signal input interface 131 and the waveform editing board 110, and between the analog signal input interface 132 and the power control board 120, ensuring that the signal transmission delays of both remain within a preset correspondence range. This controls the phase difference between the digital synchronization signal and the analog amplitude signal when they arrive at the acousto-optic driver 130 within a preset range.

[0049] More preferably, the waveform editing board 110 and the power control board 120 can also be synchronized via a common bus to further ensure the timing coordination between the digital synchronization signal and the analog amplitude signal in each stage such as power-on, light output and light off. This enables the modulation waveform synthesis unit 133 to perform local synthesis based on two input signals with high timing consistency, thereby improving the repetition rate while taking into account the modulation accuracy and shutdown reliability, and avoiding problems such as modulation failure or incomplete shutdown caused by phase mismatch of the two signals.

[0050] In a preferred embodiment, the acousto-optic driver 130 further includes a mode switching unit, which is used to switch the acousto-optic driver 130 between a local synthesis mode and a preset single-channel analog input mode. In the single-channel analog input mode, the acousto-optic driver 130 drives the acousto-optic modulator 140 according to the externally input analog modulation signal. The analog modulation signal carries timing information and amplitude information at the same time to be compatible with the traditional single-channel analog input method.

[0051] Specifically, the acoustic-optical driver 130 retains the original terminals for receiving analog modulation signals. These analog modulation signals are analog pulse duty cycle modulation signals synthesized by the power supply main control board 120 under the traditional single-channel analog input mode, which integrate timing and amplitude information. The mode switching unit can switch modes via hardware jumpers. When the jumper is set to the corresponding local synthesis mode, the acoustic-optical driver 130 synthesizes the modulation waveform locally by the modulation waveform synthesis unit 133 based on the digital synchronization signal and analog amplitude signal received by the digital signal input interface 131 and the analog signal input interface 132. When the jumper is set to the corresponding single-channel analog input mode, the acoustic-optical driver 130 directly drives the acoustic-optical modulator 140 based on the externally input analog modulation signal, without relying on the two separate signals received by the digital signal input interface 131 and the analog signal input interface 132.

[0052] By setting the aforementioned mode switching unit, the acousto-optic driver 130 can achieve compatibility and adaptation with different generations of acousto-optic drivers 130 and different repetition rate application scenarios while retaining the original single-channel analog input terminals and corresponding circuits. This allows the system provided in this embodiment of the invention to support high repetition rate local synthesis while still smoothly switching back to the traditional single-channel analog input mode, compatible with older versions of the acousto-optic driver 130 and low repetition rate application scenarios that do not require high repetition rates, without affecting the versatility of existing models. New and old models can share the same hardware platform, and upgrades can be completed without large-scale modifications to the existing hardware platform, thereby reducing the costs incurred during system modification and maintenance.

[0053] like Figure 7 As shown in the figure, from top to bottom, the figure illustrates the relationship between the analog amplitude signal, the digital synchronization signal (frequency 10MHz), the modulation waveform synthesized by the modulation waveform synthesis unit 133 inside the acousto-optic driver 130, and the optical power signal finally output by the acousto-optic modulator 140 as a function of time t. Figure 7As can be seen from the timing relationship shown, the modulation waveform synthesis unit 133 can achieve independent control of the timing and amplitude of the modulation waveform by locally synthesizing the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal. That is, the repetition frequency of the modulation waveform is determined only by the digital synchronization signal, while the amplitude of the modulation waveform is determined only by the analog amplitude signal. The two do not affect each other during transmission, thus ensuring high repetition rate modulation capability while taking into account precise control of the output optical power amplitude.

[0054] To further verify the technical effect of the laser acousto-optic modulation drive system provided in the embodiments of the present invention, under the same hardware platform, the same acousto-optic driver 130 and acousto-optic modulator 140, the core performance indicators of the traditional single-channel analog input architecture and the architecture of the embodiments of the present invention were compared under different repetition rates. The test results are shown in Table 1.

[0055] Table 1 A comparison of the test data in Table 1 shows that, under the architecture provided by this embodiment of the invention, the pulse rise time is increased by about 4 times compared to the traditional single-channel analog input architecture, the pulse width accuracy is increased by about 4 times, the phase jitter is reduced by more than 75%, the single pulse energy fluctuation is reduced from about 5% to less than 2%, and the maximum supported repetition rate is increased from 2.5MHz to 10MHz, achieving a leap in repetition rate capability. This fully demonstrates the significant advantages of the split input and local synthesis modulation waveform scheme provided by this embodiment of the invention in terms of pulse quality and repetition rate improvement compared to the traditional single-channel analog input architecture.

[0056] In a further embodiment of the present invention, a laser is also provided, which includes the laser acousto-optic modulation driving system as described above. Preferably, the laser described in this embodiment can be a picosecond laser or a femtosecond laser.

[0057] In a preferred embodiment, the laser equipped with the acousto-optic modulation drive system described in the above embodiments is a picosecond laser, and its actual implementation results are as follows: the highest stable repetition rate supported by the applied product can reach 10MHz; under the condition of 10MHz repetition rate, the pulse width accuracy reaches ±2ns, and the pulse energy fluctuation is less than 2%; in the application scenario of solar copper paste processing, the processing efficiency under the same power conditions is more than 3 times higher than that of the model with the highest stable repetition rate of 2.5MHz, and the processing linewidth uniformity is improved by 40%; currently, the system has been applied in batches on the equipment of many customers, and the competitiveness of related equipment in the high-end market has been significantly improved.

[0058] It should be understood that the present invention is not limited to the specific embodiments described above. Those skilled in the art can make various corresponding changes or modifications based on the technical solutions of the present invention without departing from the essential scope of the present invention. All such changes or modifications should fall within the protection scope of the present invention.

[0059] In an alternative embodiment, the digital synchronization signal received by the digital signal input interface 131 can be expanded into a differential output signal in the form of Low-Voltage Differential Signaling (LVDS). Compared with the single-ended output digital square wave signal, the differential signal has stronger common-mode anti-interference capability, which can further improve the anti-interference performance of the digital synchronization signal under long-distance transmission conditions and adapt to application scenarios with long transmission paths or complex electromagnetic environments. In this alternative embodiment, the core split-decoupling architecture of the present invention remains unchanged, that is, the digital synchronization signal is still used to determine the timing information of the modulation waveform, and only the physical transmission form of the signal is extended.

[0060] In an alternative embodiment, the analog amplitude signal received by the analog signal input interface 132 can be expanded into a multi-level programmable output form. That is, the power supply main control board 120 switches between multiple preset level levels through programmable control to provide more precise power adjustment levels and meet the needs of different application scenarios for fine-grained adjustment of output optical power. In this alternative embodiment, the core branch decoupling architecture of the present invention remains unchanged, that is, the analog amplitude signal is still used to determine the amplitude information of the modulation waveform, and only the signal output method is expanded.

[0061] In an alternative embodiment, the system provided by the present invention can be expanded to receive more input signals. For example, in addition to the digital synchronization signal and the analog amplitude signal, a dedicated shutter control signal is added to independently control the light output state of the acousto-optic modulator 140. In this alternative embodiment, the core idea of ​​decoupling timing information and amplitude information in the present invention remains unchanged, and only the number of signal channels is expanded accordingly to meet more complex control requirements.

[0062] In an alternative embodiment, the laser acousto-optic modulation driving system provided by the present invention is not only applicable to ultrafast laser devices with free triggering modes such as picosecond lasers and femtosecond lasers, but can also be extended to other types of acousto-optic modulation laser devices. As long as there is a technical problem of analog bandwidth limitation in the acousto-optic modulation driving architecture of such devices, the technical solution of decoupling the transmission of timing information and amplitude information and synthesizing the modulation waveform locally by the acousto-optic driver 130 provided by the present invention can be adopted to break through the corresponding analog bandwidth bottleneck and improve the repetition frequency and pulse output quality supported by the system.

[0063] In one embodiment of the present invention, an acousto-optic driver 130 is also provided, including a digital signal input interface 131, an analog signal input interface 132, and a modulation waveform synthesis unit 133. The digital signal input interface 131 is used to receive an externally input digital synchronization signal, which is used to characterize the timing information of the modulation waveform. The analog signal input interface 132 is used to receive an externally input analog amplitude signal, which is used to characterize the amplitude information of the modulation waveform. The modulation waveform synthesis unit 133 is connected to the digital signal input interface 131 and the analog signal input interface 132 respectively, and is used to locally synthesize the modulation waveform according to the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and output a radio frequency signal to drive the acousto-optic modulator 140 to modulate the laser.

[0064] In a preferred embodiment, when the analog amplitude signal is at a preset shutdown level, the acousto-optic driver 130 controls the shutdown of the radio frequency signal output to achieve shutdown control of the acousto-optic modulator 140; when the analog amplitude signal is at a preset operating level, the modulation waveform synthesis unit 133 performs modulation waveform synthesis according to the digital synchronization signal to drive the acousto-optic modulator 140 to perform modulation.

[0065] In a preferred embodiment, the digital signal input interface 131 and the analog signal input interface 132 have a preset response delay matching relationship to control the phase difference between the digital synchronization signal and the analog amplitude signal within a preset range.

[0066] In a preferred embodiment, a mode switching unit is also included, which is used to switch the acousto-optic driver 130 between a local synthesis mode and a preset single-channel analog input mode. In the single-channel analog input mode, the acousto-optic driver 130 drives the acousto-optic modulator 140 according to the externally input analog modulation signal. The analog modulation signal carries timing information and amplitude information at the same time to be compatible with the traditional single-channel analog input method.

[0067] It should be noted that the acousto-optic driver 130 provided in this embodiment and the laser acousto-optic modulation driving system provided in the above embodiments originate from the same inventive concept. The technical features with the same names, such as the digital signal input interface 131, analog signal input interface 132, and modulation waveform synthesis unit 133, involved in the two have the same or corresponding meanings. This embodiment naturally inherits the various technical features and their corresponding preferred implementations described in the above embodiments. In order to avoid repetition, the relevant content will not be elaborated in detail in this embodiment. For details, please refer to the corresponding descriptions in the above embodiments.

[0068] In one embodiment of the present invention, an acousto-optic modulation driving method is also provided, applied to the acousto-optic driver 130 or the laser acousto-optic modulation driving system in the above embodiment, comprising the following steps: Step S210: Receive the digital synchronization signal and determine the timing information of the modulation waveform based on the digital synchronization signal.

[0069] Specifically, before the acoustic-optical driver 130 receives the digital synchronization signal, an initialization operation is performed. At this time, the analog amplitude signal output by the power supply main control board 120 is at a preset shutdown level, and the acoustic-optical driver 130 controls the shutdown of the radio frequency signal output, so that the acoustic-optical modulator 140 is in the off state. When the digital signal input interface 131 of the acoustic-optical driver 130 detects the externally input digital synchronization signal, it automatically switches to the local synthesis mode, and determines the timing information such as the repetition frequency and pulse width corresponding to the modulation waveform to be synthesized according to the level change law of the digital synchronization signal, as the timing reference for the subsequent local synthesis of the modulation waveform.

[0070] Step S220: Receive the analog amplitude signal and determine the amplitude information of the modulation waveform based on the analog amplitude signal.

[0071] Specifically, the power supply main control board 120 receives an amplitude setting signal, which characterizes the target output power. Based on the target output power corresponding to the amplitude setting signal, the power supply main control board 120 adjusts the analog amplitude signal to a preset operating level corresponding to the target power, thereby setting the modulation depth reference of the acousto-optic modulator 140. The acousto-optic driver 130 receives the analog amplitude signal through the analog signal input interface 132 and determines the amplitude information corresponding to the desired synthesized modulation waveform based on its level value. Since there is a preset correspondence between the level of the analog amplitude signal and the output optical power of the acousto-optic modulator 140, this correspondence can be established through pre-calibration, thereby achieving precise control of the output optical power.

[0072] In step S230, based on timing information and amplitude information, a modulation waveform is synthesized locally, and an radio frequency signal is output to drive the acousto-optic modulator 140 to modulate the laser.

[0073] Specifically, the modulation waveform synthesis unit 133 inside the acousto-optic driver 130 synthesizes the modulation waveform locally within the acousto-optic driver 130 according to the timing information determined in step S210 and the amplitude information determined in step S220, without relying on external circuits to pre-synthesize the complete modulation signal; the modulation waveform synthesis unit 133 drives the radio frequency power circuit 134 with the synthesized modulation waveform, and the radio frequency power circuit 134 outputs the corresponding radio frequency signal, thereby driving the acousto-optic modulator 140 to achieve optical modulation output with a repetition frequency corresponding to the timing information and a power corresponding to the amplitude information.

[0074] In a preferred embodiment, the above-described acousto-optic modulation driving method further includes: In step S240, stop receiving the digital synchronization signal or set the analog amplitude signal to a preset shutdown level to turn off the output of the radio frequency signal, thereby realizing the shutdown control of the acousto-optic modulator 140.

[0075] Specifically, when it is necessary to shut down the acousto-optic modulator 140, the waveform editing board 110 can be controlled to stop outputting the digital synchronization signal, so that the digital signal input interface 131 of the acousto-optic driver 130 no longer receives valid timing information, thereby shutting down the output of the radio frequency signal; or, the analog amplitude signal can be adjusted to a preset shutdown level by controlling the power supply main control board 120, so that the acousto-optic driver 130 determines that it is currently in a shutdown state, and then controls the shutdown of the radio frequency signal output. The above two shutdown control methods can independently realize the shutdown of the acousto-optic modulator 140, and the two are redundant. If the transmission of one signal is abnormal, the other signal can still be used to reliably shut down the modulator, thereby improving the overall shutdown reliability of the system.

[0076] In a preferred embodiment, the above-described acousto-optic modulation driving method further includes: In step S310, in response to the mode switching command, the local synthesis mode is switched between the local synthesis mode and the preset single analog input mode. In the single analog input mode, the acousto-optic modulator 140 is driven according to the externally input analog modulation signal. The analog modulation signal carries timing information and amplitude information at the same time to be compatible with the traditional single analog input method.

[0077] Specifically, the acousto-optic driver 130 is equipped with a mode switching unit, which can receive mode switching commands via hardware jumpers. When the mode switching command corresponds to the local synthesis mode, the acousto-optic driver 130 executes the method described in steps S210 to S230 above, and locally synthesizes a modulation waveform to drive the acousto-optic modulator 140 based on the digital synchronization signal and analog amplitude signal received by the digital signal input interface 131 and the analog signal input interface 132, respectively. When the mode switching command corresponds to the single-channel analog input mode, the acousto-optic driver 130 directly drives the acousto-optic modulator 140 based on the externally input analog modulation signal. This analog modulation signal is a traditional single-channel analog modulation signal that simultaneously carries timing information and amplitude information, and does not need to be locally synthesized by the modulation waveform synthesis unit 133 inside the acousto-optic driver 130.

[0078] Through the above mode switching steps, the acousto-optic modulation driving method provided by this invention can achieve flexible adaptation to 130 acousto-optic drivers of different generations and different repetition rate application scenarios while retaining compatibility with the traditional single-channel analog input mode. This allows the method to support high repetition rate local synthesis modulation while still being able to smoothly switch to the traditional single-channel analog input mode according to actual application needs, thereby improving the versatility and implementation flexibility of the method in different application scenarios.

[0079] Compared with the prior art, the laser acousto-optic modulation driving system, acousto-optic driver 130, and acousto-optic modulation driving method provided in the above embodiments have at least the following technical effects: Firstly, by decoupling timing information and amplitude information into two independent transmission paths—a digital synchronization signal and an analog amplitude signal—and having the modulation waveform synthesis unit 133 locally synthesize the modulation waveform within the acousto-optic driver 130, the highest stable repetition rate is increased from 2.5MHz in the traditional single-channel analog input architecture to 10MHz, an increase of 4 times. This breaks through the inherent bandwidth bottleneck in the analog signal synthesis architecture. The performance improvement far exceeds the limit (approximately 4MHz) that can be achieved by simply upgrading the performance of devices such as digital-to-analog converters and operational amplifiers. This represents a leap in performance on an order of magnitude, fully demonstrating the significant advantages of the split-input and local synthesis architecture provided by this invention in terms of repetition rate improvement compared to the traditional single-channel analog input architecture.

[0080] Secondly, under high repetition rate conditions, the modulation waveform output by the acousto-optic driver 130 has steep edges and high pulse width accuracy. At a repetition rate of 10MHz, the pulse energy fluctuation is less than 2%, and the pulse consistency is significantly better than that of the traditional single-channel analog input architecture. The phase jitter is reduced by more than 75%, the pulse rise time is shortened from 12ns in the traditional architecture to 3ns, and the pulse width accuracy is improved from ±8ns in the traditional architecture to ±2ns. All of the above performance indicators have achieved several times improvement, thus providing a strong guarantee for the pulse output quality in high repetition rate processing scenarios.

[0081] Thirdly, the digital synchronization signal received by the digital signal input interface 131 has strong anti-interference capability, which can ensure that the pulse jitter is small and the consistency is good under high repetition frequency conditions; while the analog amplitude signal received by the analog signal input interface 132 only transmits DC level, which is not limited by the inherent bandwidth of the analog circuit. Its anti-interference capability is greatly enhanced, and it can still maintain stable transmission performance under long-distance transmission conditions, thus adapting to more complex industrial field application environments.

[0082] Fourth, since the system provided by this invention does not require replacement of the original hardware such as the power supply main control board 120 and waveform editing board 110, only the wiring method and the relevant configuration of the audio-visual driver 130 need to be adjusted to complete the upgrade and transformation of the existing equipment; the transformation cost of a single device is less than 1% of the total cost of the machine, which has a high cost performance. Existing equipment can be transformed on-site without returning to the factory, thereby reducing the cost of mass production upgrade and shortening the upgrade implementation cycle.

[0083] Fifth, by setting a mode switching unit in the acoustic-optical driver 130, the switching compatibility with the traditional single-channel analog input mode is retained, making the system provided by this invention compatible with different generations of acoustic-optical drivers 130 and application scenarios with low repetition rate requirements, without affecting the universality of existing products; new and old models can share the same hardware platform, thereby supporting smooth system upgrades and effectively reducing the costs incurred in the production and maintenance process.

[0084] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

Claims

1. A laser acousto-optic modulation driving system, characterized in that, It includes a waveform editing board, a power control board, an acoustic-optical driver, and an acoustic-optical modulator; the acoustic-optical driver includes a digital signal input interface, an analog signal input interface, and a modulated waveform synthesis unit; The waveform editing board is connected to the digital signal input interface and is used to output a digital synchronization signal, which is used to characterize the timing information of the modulated waveform. The power supply main control board is connected to the analog signal input interface and is used to output an analog amplitude signal, which is used to characterize the amplitude information of the modulated waveform. The modulation waveform synthesis unit is connected to the digital signal input interface and the analog signal input interface respectively, and is used to locally synthesize the modulation waveform according to the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and output the radio frequency signal to the acousto-optic modulator to achieve the modulation of the laser.

2. The laser acousto-optic modulation driving system according to claim 1, characterized in that, The waveform editing board includes a programmable logic device, which is used to generate and output the digital synchronization signal, which is a digital square wave signal.

3. The laser acousto-optic modulation driving system according to claim 1, characterized in that, The analog amplitude signal is a DC level signal and does not carry the timing information of the modulated waveform.

4. The laser acousto-optic modulation driving system according to claim 1, characterized in that, When the analog amplitude signal is at a preset shutdown level, the acousto-optic driver controls the RF signal output to be turned off, thereby achieving shutdown control of the acousto-optic modulator; When the analog amplitude signal is at a preset working level, the modulation waveform synthesis unit performs modulation waveform synthesis according to the digital synchronization signal to drive the acousto-optic modulator to perform modulation.

5. The laser acousto-optic modulation driving system according to claim 1, characterized in that, The signal transmission path between the digital signal input interface and the waveform editing board, and the signal transmission path between the analog signal input interface and the power control board, are set according to a preset path length relationship to control the phase difference between the digital synchronization signal and the analog amplitude signal within a preset range.

6. The laser acousto-optic modulation driving system according to claim 1, characterized in that, The acousto-optic driver also includes a mode switching unit, which is used to switch the acousto-optic driver between a local synthesis mode and a preset single-channel analog input mode. In the single-channel analog input mode, the acousto-optic driver drives the acousto-optic modulator according to the externally input analog modulation signal. The analog modulation signal carries both timing information and amplitude information to be compatible with the traditional single-channel analog input mode.

7. An acousto-optic driver, characterized in that, It includes a digital signal input interface, an analog signal input interface, and a modulation waveform synthesis unit; The digital signal input interface is used to receive externally input digital synchronization signals, which are used to characterize the timing information of the modulation waveform. The analog signal input interface is used to receive an externally input analog amplitude signal, which is used to characterize the amplitude information of the modulated waveform; The modulation waveform synthesis unit is connected to the digital signal input interface and the analog signal input interface respectively, and is used to locally synthesize the modulation waveform according to the timing information determined by the digital synchronization signal and the amplitude information determined by the analog amplitude signal, and output the radio frequency signal to drive the acousto-optic modulator to achieve modulation of the laser.

8. The acousto-optic driver according to claim 7, characterized in that, When the analog amplitude signal is at a preset shutdown level, the acousto-optic driver controls the shutdown of the radio frequency signal output to achieve shutdown control of the acousto-optic modulator. When the analog amplitude signal is at a preset working level, the modulation waveform synthesis unit performs modulation waveform synthesis according to the digital synchronization signal to drive the acousto-optic modulator to perform modulation.

9. The acousto-optic driver according to claim 7, characterized in that, The digital signal input interface and the analog signal input interface have a preset response delay matching relationship to control the phase difference between the digital synchronization signal and the analog amplitude signal within a preset range.

10. The acousto-optic driver according to any one of claims 7-9, characterized in that, It also includes a mode switching unit, which is used to switch the acousto-optic driver between a local synthesis mode and a preset single-channel analog input mode; In the single-channel analog input mode, the acousto-optic driver drives the acousto-optic modulator according to the externally input analog modulation signal. The analog modulation signal carries both timing information and amplitude information to be compatible with the traditional single-channel analog input mode.

11. An acousto-optic modulation driving method, applied to the acousto-optic driver as described in any one of claims 7-10, characterized in that, include: Receive a digital synchronization signal and determine the timing information of the modulation waveform based on the digital synchronization signal; Receive an analog amplitude signal and determine the amplitude information of the modulation waveform based on the analog amplitude signal; Based on the timing information and amplitude information, a modulation waveform is synthesized locally, and an radio frequency signal is output to drive the acousto-optic modulator to modulate the laser.

12. The acousto-optic modulation driving method according to claim 11, characterized in that, Also includes: Stop receiving the digital synchronization signal, or set the analog amplitude signal to a preset shutdown level to turn off the output of the radio frequency signal, thereby achieving shutdown control of the acousto-optic modulator.

13. The acousto-optic modulation driving method according to claim 11 or 12, characterized in that, Also includes: In response to a mode switching command, it switches between the local synthesis mode and the preset single analog input mode; In the single-channel analog input mode, the acousto-optic modulator is driven by an externally input analog modulation signal. The analog modulation signal carries both timing information and amplitude information to be compatible with the traditional single-channel analog input method.

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