A high-speed high-reliability pulsed fiber laser control device and method

Abstract

The application provides a high-speed and high-reliability pulse fiber laser control device and method, and belongs to the technical field of pulse fiber lasers.The device comprises an optical amplifier, a frequency measurement module, a frequency generation module, a pulse generation module, a current control module and a gain adjustment module.The frequency measurement module is used for receiving an external frequency control signal, measuring the period of the external frequency control signal and outputting the frequency value of the external frequency control signal; the frequency generation module is in communication connection with the frequency measurement module, used for receiving the frequency value output by the frequency measurement module and outputting a trigger signal; the pulse generation module is connected with the frequency generation module and a seed driver, used for receiving an external pulse width control signal and the trigger signal, obtaining a pulse width value and generating a pulse signal; the current control module is used for generating a current control signal according to the pulse width value and the frequency value; the gain adjustment module is used for receiving the current control signal and performing gain adjustment on the optical amplifier; and the main controller is used for outputting a switch control signal of the current control module and providing a gain coefficient to the gain adjustment module.

Description

Technical Field

[0001] This invention relates to the field of pulsed fiber laser technology, and in particular to a high-speed, high-reliability pulsed fiber laser control device and method. Background Technology

[0002] In the field of laser industrial processing, especially in high-speed marking systems, the output laser frequency, pulse width, power and other indicators are switched in real time and at high speed. The conventional method is to calculate the current parameters of each amplifier stage independently and send them out separately. Such a design system is relatively complex, consumes too many resources and has a high cost. Moreover, each parameter needs to be sent out independently when switching parameters, which is not only easy to be interfered with, but also affects other modules when sending data. Furthermore, the transmission of parameters at each stage cannot be completely synchronized during high-speed switching, resulting in a time difference, which ultimately affects the response time of rapid switching.

[0003] Therefore, it is essential to provide a high-speed, high-reliability pulsed fiber laser control device and method that reduces the laser's response time, simplifies the system structure, reduces the computational workload after parameter modifications, and stabilizes the laser's output power by adjusting the synchronization of data transmission. Summary of the Invention

[0004] In view of this, the present invention proposes a high-speed, high-reliability pulsed fiber laser control device and method that can simultaneously drive the multi-stage pumping stages of an optical amplifier synchronously and generate seed light driving signals separately, so that the pumping stages of the optical amplifier can respond synchronously and shorten the synchronization time difference.

[0005] On one hand, the present invention provides a high-speed, high-reliability pulsed fiber laser control device, including an optical amplifier; and further including:

[0006] The frequency measurement module is used to receive external frequency control signals, measure the period of the external frequency control signals, and output the frequency value of the external frequency control signals. The frequency measurement module mainly measures the period of the input external frequency control signals. Internally, it uses a counter to count the period of the rising edge of the external frequency control signals. Its output is the period value under the counting clock.

[0007] The frequency generation module is communicatively connected to the frequency measurement module. It is used to receive the frequency value output by the frequency measurement module and output a trigger signal.

[0008] The pulse generation module is communicatively connected to the frequency generation module and electrically connected to the seed driver. It is used to receive external pulse width control signals and trigger signals, obtain pulse width values, generate pulse signals according to the external pulse width control signals, and output pulse signals according to the trigger signals. The pulse signals are sent to the input stage of the amplifier.

[0009] The current control module communicates with the frequency generation module and the pulse generation module. It receives the pulse width value output by the pulse generation module and the frequency value of the external frequency control signal to generate a current control signal. The current control signal here is the peak current calculated based on different frequency values.

[0010] The gain adjustment module is communicatively connected to the current control module and is used to receive the current control signal from the current control module to adjust the gain of the optical amplifier.

[0011] The main controller is communicatively connected to both the current control module and the gain adjustment module. It outputs switching control signals to the current control module and provides gain coefficients to the gain adjustment module.

[0012] Based on the above technical solutions, preferably, the optical amplifier includes a seed driver, a first-stage pump driver, a second-stage pump driver, and a third-stage pump driver arranged sequentially and optically connected. The seed driver serves as the input stage of the optical amplifier and receives the pulse signal output by the pulse generation module. The first-stage pump driver, the second-stage pump driver, and the third-stage pump driver are electrically connected to the gain adjustment module, which adjusts the gain coefficients of the first-stage pump driver, the second-stage pump driver, and the third-stage pump driver.

[0013] Preferably, the gain adjustment module includes a first gain controller, a second gain controller, a third gain controller, a first gain adjustment unit, a second gain adjustment unit, and a third gain adjustment unit;

[0014] The first, second, and third gain controllers are all communicatively connected to the current control module and the main controller. The main controller provides gain coefficients to the first, second, and third gain controllers respectively. The third gain controller is also communicatively connected to an external power control signal. The first gain controller provides a first input signal to the first gain adjustment unit based on the received current control signal and the first gain coefficient, and adjusts the output of the first gain adjustment unit. The second gain controller provides a second input signal to the second gain adjustment unit based on the received analog quantity and the second gain coefficient, and adjusts the output of the second gain adjustment unit. The third gain controller provides a third input signal to the third gain adjustment unit based on the received analog quantity, the third gain coefficient, and the external power control signal, and adjusts the output of the third gain adjustment unit.

[0015] The output of the first gain adjustment unit is electrically connected to the power input of the first-stage pump driver, the output of the second gain adjustment unit is electrically connected to the power input of the second-stage pump driver, and the output of the third gain adjustment unit is electrically connected to the power input of the third-stage pump driver.

[0016] Preferably, the gain adjustment module further includes a digital-to-analog converter (DAC) unit and a buffer; the input terminal of the DAC unit is electrically connected to the output terminal of the current control module, the output terminal of the DAC unit is electrically connected to the input terminal of the buffer, and the output terminal of the buffer is communicatively connected to the first gain controller, the second gain controller, and the third gain controller, respectively. The DAC unit performs analog-to-digital conversion on the received current control signal and sends the generated analog signal through the buffer to the first gain controller, the second gain controller, and the third gain controller.

[0017] More preferably, the first gain adjustment unit, the second gain adjustment unit, and the third gain adjustment unit each include an emitter follower, a digitally controlled potentiometer, and a fixed potentiometer; the third gain adjustment unit also includes a multiplier, the input of which is communicatively connected to the output of the third gain controller and an external power control signal, respectively; the input of the emitter follower receives the analog quantity output by the first gain controller, the analog quantity output by the second gain controller, or the output result of the multiplier; the output of the emitter follower is electrically connected to one end of the digitally controlled potentiometer, the other end of the digitally controlled potentiometer is electrically connected to one end of the fixed potentiometer, and the other end of the fixed potentiometer is grounded; the common terminal of the digitally controlled potentiometer and the fixed potentiometer serves as the output of the first gain adjustment unit, the second gain adjustment unit, and the third gain adjustment unit.

[0018] More preferably, the voltage division ratio between the digitally controlled potentiometer and the fixed potentiometer is proportional to the first gain coefficient, the second gain coefficient, or the third gain coefficient.

[0019] Based on the above technical solutions, a preferred embodiment also includes an EEPROM, which is communicatively connected to the main controller and used to store gain coefficient data.

[0020] On the other hand, the present invention provides a high-speed, high-reliability pulsed fiber laser control method, comprising the following steps:

[0021] S1: Configure the above-mentioned high-speed, high-reliability pulsed fiber laser control device;

[0022] S2: An external control frequency signal is sent to the frequency measurement module. The frequency measurement module obtains the frequency value of the external frequency control signal and sends the frequency value to the frequency generation module. The frequency generation module generates a trigger signal based on the frequency value. The pulse generation module receives the external pulse width control signal on one hand and the trigger signal sent by the frequency generation module on the other hand, obtains the pulse width value, and outputs a pulse signal according to the external pulse control signal. The pulse signal is sent to the seed driver of the optical amplifier to generate the initial optical pulse signal.

[0023] S3: The current control module receives the pulse width value output by the pulse generation module and the frequency value of the external frequency control signal sent by the frequency generation module, and generates a current control signal. The switching state of the current control module is controlled by the switching control signal of the main controller. The current control signal is sent to the gain adjustment module. The gain adjustment module also receives the gain coefficient provided by the main controller. According to the current control signal and the gain coefficient, each gain controller of the gain adjustment module drives the pump drivers of each stage of the optical amplifier through three independent gain adjustment units. The input of the third-stage gain adjustment unit also includes an external power control signal, which is used to adjust the output power of the third-stage pump driver, thereby adjusting the output power of the optical amplifier.

[0024] Preferably, the output I of the current control module is related to the power reduction frequency point f0 of the optical amplifier and the frequency value f of the external frequency control signal: when f > f0, I = I p ×(af+b); when f≤f0, I=I p ;I p denoted as , where is the peak current of the current control module under different pulses, and 'a' and 'b' are coefficients.

[0025] Preferably, the operating current of the third-stage pump driver is related to the third gain coefficient, the external power control signal, and the current control signal, satisfying I ma =I dac ×P×kma, where I is the operating current of the third-stage pump driver. dac The output current signal of the current control module after processing by the analog-to-digital conversion unit, P is the percentage of output power corresponding to the external power control signal, and kma is the third gain coefficient.

[0026] The present invention provides a high-speed, high-reliability pulsed fiber laser control device and method, which, compared with the prior art, has the following advantages:

[0027] (1) The present invention provides a circuit structure for an optical amplifier that can synchronously drive multiple pumping links. By processing external frequency control signals and pulse width control signals, the peak current value at the corresponding frequency value is obtained. The actual control current signal is obtained by adjusting the switch of the main controller. Then, it is provided to the constant current source of each pump driver through analog-to-digital conversion and buffering. The data of each pump driver is processed synchronously, and the delay is significantly reduced.

[0028] (2) The third-stage pump driver is the main amplifier. Its operating current is directly related to the third gain coefficient, the external power control signal and the current control signal. This is beneficial for real-time adjustment of the percentage of the laser's output power relative to the rated output, so as to meet the different processing requirements of variable power. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic block diagram of the structure of a high-speed, high-reliability pulsed fiber laser control device and method according to the present invention;

[0031] Figure 2 This is a schematic diagram of the first gain adjustment unit and the second gain adjustment unit of the high-speed, high-reliability pulsed fiber laser control device and method of the present invention.

[0032] Figure 3 This is a schematic diagram of the third gain adjustment unit of a high-speed, high-reliability pulsed fiber laser control device and method of the present invention. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] The high-speed marking system outputs laser frequencies, pulse widths, and power that switch in real-time at high speed. Conventional methods involve independently calculating and sending the current parameters of each amplifier stage. This design is relatively complex, resource-intensive, and costly. Furthermore, the need for independent parameter sending during switching leads to asynchronous data processing. Therefore, on the one hand, combining... Figure 1 As can be seen, the present invention provides a high-speed, high-reliability pulsed fiber laser control device, including an optical amplifier; and further including:

[0035] The frequency measurement module is used to receive external frequency control signals, measure the period of external frequency control signals, and output the frequency value of external frequency control signals.

[0036] The frequency generation module is communicatively connected to the frequency measurement module. It receives the frequency value output by the frequency measurement module and outputs a trigger signal. The trigger signal follows the external frequency control signal. When the external frequency control signal exists, the frequency generation module outputs a trigger signal that follows the external frequency control signal. When the external frequency control signal does not exist, the frequency generation module will not output a trigger signal.

[0037] The pulse generation module, communicatively connected to the frequency generation module and electrically connected to the seed driver, receives external pulse width control signals and trigger signals to obtain pulse width values. It then generates pulse signals based on the external pulse width control signals and outputs pulse signals based on the trigger signals. These pulse signals are fed into the input stage of the amplifier. In this embodiment, the pulse generation module generates electrical pulses ranging from 0.5 to 500 ns. The pulse width value is generated based on the external pulse width control signal. If no new external pulse width control signal is input to the pulse generation module, the output pulse width value will remain unchanged from the previous value, rather than being unoutput.

[0038] The current control module communicates with the frequency generation module and the pulse generation module. It receives the pulse width value output by the pulse generation module and the frequency value of the external frequency control signal, and generates a current control signal. This current control signal is the peak current calculated based on the pulse width value and the frequency value of the external frequency control signal.

[0039] The gain adjustment module, which communicates with the current control module, receives the current control signal from the current control module and adjusts the gain of the optical amplifier; corresponding to... Figure 1 The dashed box in the figure simultaneously receives the output of the current control module and the gain provided by the main controller, satisfying the driving requirements of the constant current source built into the pumps of each stage of the optical amplifier.

[0040] The main controller communicates with both the current control module and the gain adjustment module. It outputs switching control signals to the current control module and provides gain coefficients to the gain adjustment module. Additionally, the main controller monitors each stage of the optical amplifier in real time and is available for external use or expansion via a communication interface. The main controller can modify the output of the current control module to achieve different effective values ​​of the current control signal output. The gain coefficients can adjust the gain of the pump signals fed into each stage of the optical amplifier to meet the actual output requirements.

[0041] In one embodiment of the present invention, the high-speed, high-reliability pulsed fiber laser control device further includes an EEPROM, which is communicatively connected to the main controller and used to store gain coefficient data so that the main controller can call and send it.

[0042] like Figure 1As shown, the optical amplifier includes a seed driver, a first-stage pump driver, a second-stage pump driver, and a third-stage pump driver arranged sequentially and optically connected. The seed driver serves as the input stage of the optical amplifier and receives the pulse signal output by the pulse generation module. The first-stage pump driver, the second-stage pump driver, and the third-stage pump driver are electrically connected to the gain adjustment module, which adjusts the gain coefficients of the first-stage pump driver, the second-stage pump driver, and the third-stage pump driver.

[0043] It should be noted that the gain coefficient is a static gain coefficient obtained through debugging. The gain coefficients of each pump driver stage of the optical amplifier will not be adjusted due to frequency and pulse switching. The adjustment of the gain system is controlled by the main controller. During the debugging phase, the main controller confirms the static gain coefficients of the first-stage pump driver, the second-stage pump driver, and the third-stage pump driver one by one, and writes them into the EEPROM after confirmation. After debugging is completed, the high-speed, high-reliability pulsed fiber laser control device writes the gain coefficients stored in the EEPROM into the gain adjustment module every time it is powered on.

[0044] A typical seed driver includes an RF amplifier, a temperature control module, and a laser diode. The pulse signal provided by the pulse generation module cannot directly drive the laser diode; it needs to be processed by the RF amplifier before driving the laser diode to generate the corresponding light pulse. The laser diode generates a lot of heat, which can cause wavelength drift in the light pulse. Therefore, a temperature control module is needed to stabilize the laser diode's temperature and ensure stable wavelength of the output light pulse. The first-stage, second-stage, and third-stage pump drivers correspond to a common three-stage pump amplification structure. Each pump driver integrates a constant current source and a pump. The constant current source provides the driving signal to the pump, and the constant current source is driven and adjusted by a gain adjustment module. The laser diode also outputs light pulses ranging from 0.5 to 500 ns.

[0045] like Figure 1 As shown, the gain adjustment module includes a first gain controller, a second gain controller, a third gain controller, a first gain adjustment unit, a second gain adjustment unit, and a third gain adjustment unit;

[0046] The first, second, and third gain controllers are all communicatively connected to the current control module and the main controller. The main controller provides gain coefficients to the first, second, and third gain controllers respectively. The third gain controller is also communicatively connected to an external power control signal. The first gain controller provides a first input signal to the first gain adjustment unit based on the received current control signal and the first gain coefficient, and adjusts the output of the first gain adjustment unit. The second gain controller provides a second input signal to the second gain adjustment unit based on the received analog quantity and the second gain coefficient, and adjusts the output of the second gain adjustment unit. The third gain controller provides a third input signal to the third gain adjustment unit based on the received analog quantity, the third gain coefficient, and the external power control signal, and adjusts the output of the third gain adjustment unit.

[0047] The output of the first gain adjustment unit is electrically connected to the power input of the first-stage pump driver, the output of the second gain adjustment unit is electrically connected to the power input of the second-stage pump driver, and the output of the third gain adjustment unit is electrically connected to the power input of the third-stage pump driver.

[0048] The gain adjustment module also includes a digital-to-analog converter (DAC) unit and a buffer. The input of the DAC unit is electrically connected to the output of the current control module, and the output of the DAC unit is electrically connected to the input of the buffer. The output of the buffer is communicatively connected to the first gain controller, the second gain controller, and the third gain controller, respectively. The DAC unit performs analog-to-digital conversion on the received current control signal and sends the generated analog quantity through the buffer to the first gain controller, the second gain controller, and the third gain controller. The DAC unit receives the current value from the current control signal, converts it into an analog quantity, such as a voltage value, and sends it to the first gain controller, the second gain controller, and the third gain controller after passing through the buffer. Each gain controller then outputs the value to its corresponding first gain adjustment unit, second gain adjustment unit, and third gain adjustment unit. The outputs of the first gain adjustment unit, the second gain adjustment unit, and the third gain adjustment unit drive the constant current sources built into the first-stage pump driver, the second-stage pump driver, and the third-stage pump driver, respectively.

[0049] Similarly, Figure 1As shown within the dashed box, the first, second, and third gain adjustment units each include an emitter follower, a digitally controlled potentiometer, and a fixed potentiometer. The third gain adjustment unit also includes a multiplier, whose input is communicatively connected to the output of the third gain controller and an external power control signal, respectively. The emitter follower's input receives the analog signal output from the first gain controller, the analog signal output from the second gain controller, or the output of the multiplier. The emitter follower's output is electrically connected to one end of the digitally controlled potentiometer, and the other end of the digitally controlled potentiometer is electrically connected to one end of the fixed potentiometer, which is grounded. The common terminal of the digitally controlled potentiometer and the fixed potentiometer serves as the output of the first, second, and third gain adjustment units.

[0050] Combination Figure 2 and Figure 3 It can be seen that the first and second gain adjustment units have identical structures, both including a first emitter follower U1, a digitally controlled potentiometer R, and a fixed potentiometer R0. The first emitter follower U1 receives the analog signal, and its output drives the constant current source built into the first-stage pump driver and the second-stage pump driver via a voltage divider circuit composed of the digitally controlled potentiometer R and the fixed potentiometer R0. The third gain adjustment unit differs from the first and second gain adjustment units in that it also includes a multiplier. The multiplier performs a multiplication operation on the analog signal and the external power control signal, and the result is input into the second emitter follower U2. The output of the second emitter follower U2 drives the constant current source built into the third-stage pump driver via a voltage divider circuit composed of the digitally controlled potentiometer R and the fixed potentiometer R0. That is, the input of the third gain adjustment unit simultaneously considers the analog signal corresponding to the current control signal, the third gain coefficient, and the output power percentage corresponding to the external power control signal.

[0051] In one embodiment of the present invention, the voltage division ratio between the digitally controlled potentiometer and the fixed potentiometer is proportional to the first gain coefficient, the second gain coefficient, or the third gain coefficient.

[0052] On the other hand, the present invention provides a high-speed, high-reliability pulsed fiber laser control method, comprising the following steps:

[0053] S1: Configure the above-mentioned high-speed, high-reliability pulsed fiber laser control device;

[0054] S2: an external control frequency signal is sent to a frequency measurement module, the frequency measurement module acquires the frequency value of the external frequency control signal and sends the frequency value to a frequency generation module, and the frequency generation module is configured to generate a trigger signal according to the frequency value; a pulse generation module receives an external pulse width control signal on one hand and receives the trigger signal sent by the frequency generation module on the other hand, acquires a pulse width value, outputs a pulse signal according to the external pulse control signal, and sends the pulse signal to a seed driver of an optical amplifier to generate an initial optical pulse signal;

[0055] S3: a current control module receives the pulse width value output by the pulse generation module on one hand and receives the frequency value of the external frequency control signal sent by the frequency generation module on the other hand to generate a current control signal, the switching state of the current control module is controlled by a switching control signal of a main controller, the current control signal is sent to a gain adjustment module, the gain adjustment module also receives a gain coefficient provided by the main controller, each gain controller of the gain adjustment module drives all stages of pump drivers of the optical amplifier through three independent gain adjustment units according to the current control signal and the gain coefficient, the input of the third-stage gain adjustment unit further comprises an external power control signal, and the external power control signal is configured to adjust the output power of the third-stage pump driver, thereby adjusting the output power of the optical amplifier.

[0056] In one embodiment, the output I of the current control module is related to the power reduction frequency point f0 of the optical amplifier and the frequency value f of the external frequency control signal: when f>f0, I=I p ×(af+b); when f≤f0, I=I p ; I p is the peak current of the current control module under different pulses, and a and b are coefficients. The single pulse energy and the frequency power of the device reach the maximum at the power reduction frequency point f0. When f<f0, the single pulse energy remains unchanged and the average power decreases linearly; when f>f0, the average power remains unchanged and the single pulse energy decreases linearly.

[0057] In another embodiment, the working current of the third-stage pump driver is related to the third gain coefficient, the external power control signal and the current control signal, satisfying I ma =I dac ×P×kma, where is the working current of the third-stage pump driver, I dac is the output current signal of the current control module processed by an analog-to-digital conversion unit, P is the percentage of rated output power corresponding to the external power control signal, and kma is the third gain coefficient.

[0058] The above description is only preferred embodiments of the present invention, and is not used to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-speed high-reliability pulsed fiber laser control device comprising an optical amplifier: characterized in that, Also includes: The frequency measurement module is used to receive external frequency control signals, measure the period of external frequency control signals, and output the frequency value of external frequency control signals. The frequency generation module is communicatively connected to the frequency measurement module. It is used to receive the frequency value output by the frequency measurement module and output a trigger signal. The pulse generation module is communicatively connected to the frequency generation module and electrically connected to the seed driver. It is used to receive external pulse width control signals and trigger signals, obtain pulse width values, generate pulse signals according to the external pulse width control signals, and output pulse signals according to the trigger signals. The pulse signals are sent to the input stage of the amplifier. The current control module is communicatively connected to the frequency generation module and the pulse generation module. It is used to receive the pulse width value output by the pulse generation module and the frequency value of the external frequency control signal, and generate a current control signal. The gain adjustment module is communicatively connected to the current control module and is used to receive the current control signal from the current control module to adjust the gain of the optical amplifier. The optical amplifier includes a seed driver, a first-stage pump driver, a second-stage pump driver, and a third-stage pump driver arranged sequentially and optically connected. The seed driver serves as the input stage of the optical amplifier and receives the pulse signal output by the pulse generation module. The first-stage pump driver, the second-stage pump driver, and the third-stage pump driver are electrically connected to the gain adjustment module, which adjusts the gain coefficients of the first-stage pump driver, the second-stage pump driver, and the third-stage pump driver. The gain adjustment module includes a first gain controller, a second gain controller, a third gain controller, a first gain adjustment unit, a second gain adjustment unit, and a third gain adjustment unit; The first gain controller, the second gain controller, and the third gain controller are all connected to the current control module and the main controller. The main controller provides gain coefficients to the first gain controller, the second gain controller, and the third gain controller, respectively. The third gain controller is also connected to an external power control signal. The first gain controller provides a first input signal to the first gain adjustment unit based on the received current control signal and the first gain coefficient, and adjusts the output of the first gain adjustment unit. The second gain controller provides a second input signal to the second gain adjustment unit based on the received analog signal and the second gain coefficient, and adjusts the output of the second gain adjustment unit. The third gain controller provides a third input signal to the third gain adjustment unit based on the received analog signal, the third gain coefficient, and the external power control signal, and adjusts the output of the third gain adjustment unit. The output terminal of the first gain adjustment unit is electrically connected to the power input terminal of the first stage pump driver, the output terminal of the second gain adjustment unit is electrically connected to the power input terminal of the second stage pump driver, and the output terminal of the third gain adjustment unit is electrically connected to the power input terminal of the third stage pump driver. The main controller is communicatively connected to both the current control module and the gain adjustment module. It outputs switching control signals to the current control module and provides gain coefficients to the gain adjustment module.

2. The high-speed and high-reliability pulsed fiber laser control device according to claim 1, wherein The gain adjustment module further includes a digital-to-analog converter (DAC) unit and a buffer. The input terminal of the DAC unit is electrically connected to the output terminal of the current control module, and the output terminal of the DAC unit is electrically connected to the input terminal of the buffer. The output terminal of the buffer is communicatively connected to the first gain controller, the second gain controller, and the third gain controller, respectively. The DAC unit performs analog-to-digital conversion on the received current control signal and sends the generated analog signal through the buffer to the first gain controller, the second gain controller, and the third gain controller.

3. The high-speed and high-reliability pulsed fiber laser control device according to claim 1, wherein The first, second, and third gain adjustment units each include an emitter follower, a digitally controlled potentiometer, and a fixed potentiometer. The third gain adjustment unit also includes a multiplier, whose input is communicatively connected to the output of the third gain controller and an external power control signal, respectively. The emitter follower's input receives the analog signal output from the first gain controller, the analog signal output from the second gain controller, or the output of the multiplier. The emitter follower's output is electrically connected to one end of the digitally controlled potentiometer, and the other end of the digitally controlled potentiometer is electrically connected to one end of the fixed potentiometer, which is grounded. The common terminal of the digitally controlled potentiometer and the fixed potentiometer serves as the output of the first, second, and third gain adjustment units.

4. The high-speed and high-reliability pulsed fiber laser control device according to claim 3, wherein The voltage division ratio between the digitally controlled potentiometer and the fixed potentiometer is proportional to the first gain coefficient, the second gain coefficient, or the third gain coefficient.

5. The high-speed and high-reliability pulsed fiber laser control device according to claim 1, wherein It also includes an EEPROM, which is connected to the main controller and is used to store the gain coefficient data.

6. A high-speed, high-reliability pulsed fiber laser control method, characterized in that, Includes the following steps: S1: Configure the high-speed, high-reliability pulsed fiber laser control device as described in any one of claims 1-5; S2: An external control frequency signal is sent to the frequency measurement module. The frequency measurement module obtains the frequency value of the external frequency control signal and sends the frequency value to the frequency generation module. The frequency generation module generates a trigger signal based on the frequency value. The pulse generation module receives the external pulse width control signal on one hand and the trigger signal sent by the frequency generation module on the other hand, obtains the pulse width value, and outputs a pulse signal according to the external pulse control signal. The pulse signal is sent to the seed driver of the optical amplifier to generate the initial optical pulse signal. S3: The current control module receives the pulse width value output by the pulse generation module and the frequency value of the external frequency control signal sent by the frequency generation module, and generates a current control signal. The switching state of the current control module is controlled by the switching control signal of the main controller. The current control signal is sent to the gain adjustment module. The gain adjustment module also receives the gain coefficient provided by the main controller. According to the current control signal and the gain coefficient, each gain controller of the gain adjustment module drives the pump drivers of each stage of the optical amplifier through three independent gain adjustment units. The input of the third-stage gain adjustment unit also includes an external power control signal, which is used to adjust the output power of the third-stage pump driver, thereby adjusting the output power of the optical amplifier.

7. The high-speed, high-reliability pulsed fiber laser control method according to claim 6, characterized in that, The output of the current control module I With the power reduction frequency of the optical amplifier f 0 and the frequency value of the external frequency control signal f Size-related: when f > f At 0 o'clock, I = I p × (af+b) ; when f ≤ f At 0 o'clock, I = I p ; I p denoted as , where is the peak current of the current control module under different pulses, and 'a' and 'b' are coefficients.

8. The high-speed, high-reliability pulsed fiber laser control method according to claim 6, characterized in that, The operating current of the third-stage pump driver is related to the third gain coefficient, the external power control signal, and the current control signal, and satisfies... I ma = I dac ×P×kma, where is the operating current of the third-stage pump driver. I dac The output current signal of the current control module after processing by the analog-to-digital conversion unit, P is the percentage of output power corresponding to the external power control signal, and kma is the third gain coefficient.

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