A driving control system and driving control method for a picosecond laser seed source

Abstract

A drive control system and drive control method for a picosecond laser seed source, belonging to the field of picosecond laser seed sources, includes a temperature sensor that detects a Peltier temperature state signal in real time; a Peltier control and adjustment circuit that adjusts the drive power of the Peltier drive circuit according to the temperature state signal and a target temperature using a PID dynamic adjustment method. The Peltier adjusts the real-time temperature of the seed source to maintain the ambient temperature thereof at the target temperature; the seed source control and adjustment circuit determines whether the temperature state signal meets the seed source operating conditions; and a seed source output feedback circuit that feeds back a drive current signal to the seed source control and adjustment circuit in real time and integrates the target drive current signal and the output drive current signal to control the seed source drive circuit. The present invention achieves that parameters such as the uniformity of the output electric pulse waveform under high-frequency operating conditions are adapted to the use requirements of the laser equipment through precise and real-time dynamic adjustment of the seed source operating environment temperature and setting of the operating delay.

Description

Technical Field

[0001] The present invention belongs to the technical field of picosecond laser seed sources, and in particular relates to a driving control system and a driving control method of a picosecond laser seed source. Background Art

[0002] Picosecond lasers, or picosecond lasers, have a pulse width of picoseconds and offer advantages such as high accuracy, rapid recovery, and minimal damage. They are widely used in dermatology, including whitening, freckle removal, tattoo removal, facial fine line reduction, skin rejuvenation, and treatment of acne, scars, and photoaging. These advantages make them highly valuable for research and development and application.

[0003] As a major part of laser equipment, picosecond laser seed source is usually used to generate high-intensity laser pulses in extremely short time. The main function of this high-intensity laser pulse is to serve as the seed light source for other laser systems to generate more powerful and shorter pulse laser output.

[0004] Parameters such as the laser wavelength, pulse width, time point when the laser energy storage of the entire machine accumulates to the peak, power, and output stability and uniformity at different frequencies emitted by the picosecond laser seed source play a decisive role in the laser parameters ultimately output by the laser equipment.

[0005] The seed source power supply and its control system are the driving and controlling components of the picosecond laser seed source. The relevant laser parameters significantly influence the generation and quality of the laser. Factors influencing the seed source's output laser parameters include: ambient temperature stability, the start time of the drive pulse, the pulse width of the seed source, the rise time, the fall time, the smoothness of the pulse high level, and the accuracy of the current value.

[0006] Most of the existing technologies are only designed for part of the seed source drive, temperature control and delay control, with low integration and insufficient working connection between key parts, which makes it cumbersome to use, difficult to achieve the final effect, and insufficient stability of the seed source output waveform; the targeted adjustment of the seed source drive current size, pulse width, pulse rising and falling edges, and the time node of the drive pulse is not flexible; the temperature control state is not sufficiently correlated with the seed drive, and it is impossible to achieve accurate real-time dynamic adjustment of the seed source working temperature. Summary of the Invention

[0007] The purpose of the present invention is to provide a driving control system and a driving control method for a picosecond laser seed source, so as to solve the problems existing in the prior art.

[0008] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0009] The present invention provides a driving control system for a picosecond laser seed source, which mainly includes: a power supply, an external control input unit, a delay circuit, a seed source control and regulation circuit, a seed source drive circuit, a seed source output feedback circuit, a seed source, a temperature sensor, a temperature reading circuit, a Peltier control and regulation circuit, a Peltier drive circuit, and a Peltier;

[0010] The external control input unit is used to receive and send external control commands to the seed source control and regulation circuit and the Peltier control and regulation circuit, and to input a set target temperature;

[0011] The Peltier control and adjustment circuit is used to receive an external control command to drive the Peltier to work through the Peltier drive circuit, and is used to receive a temperature state signal of the Peltier fed back by the temperature reading circuit, and is used to adjust the driving power of the Peltier drive circuit according to a set target temperature using a PID dynamic adjustment method based on the fed back temperature state signal, thereby driving the Peltier to work through the Peltier drive circuit, and adjusting the real-time temperature of the seed source through the Peltier to maintain the ambient temperature of the seed source at the target temperature;

[0012] The Peltier driving circuit is used to receive control instructions from the Peltier control and regulation circuit and provide electrical energy for the Peltier operation;

[0013] The Peltier is mounted on the seed source and is used to adjust the ambient temperature of the seed source in real time;

[0014] The temperature sensor is used to detect the temperature status signal of the Peltier in real time and transmit the temperature status signal to the temperature reading circuit;

[0015] The temperature reading circuit is used to receive the Peltier temperature status signal sent by the temperature sensor and transmit it to the seed source control and regulation circuit and the Peltier control and regulation circuit respectively;

[0016] The seed source control and regulation circuit is used to receive an external control command sent by an external control input unit, and to receive a temperature status signal of the Peltier sent by a temperature reading circuit, and to judge whether the temperature status signal meets the working conditions of the seed source, and at the same time feed back the temperature status signal of the Peltier to the external control input unit. When the temperature status signal of the Peltier meets the working conditions of the seed source, the seed source control and regulation circuit transmits the judgment result to the external control input unit, and the external control input unit sends a control signal to the seed source control and regulation circuit according to the judgment result, and is used to receive a driving current signal output by the seed source driving circuit fed back by the seed source output feedback circuit, and is used to perform integral regulation according to the received control signal, the temperature status signal, the set target driving current signal and the fed-back driving current signal output by the seed source driving circuit, thereby controlling the operation of the seed source driving circuit;

[0017] The delay circuit receives the working signal transmitted by the seed source control and regulation circuit, and can adjust the time nodes of the start and end of the electric pulse output by the seed source drive circuit in combination with the manually set control signal; and sends a corresponding control signal to the seed source control and regulation circuit;

[0018] The seed source driving circuit is used to receive the relevant control signal of the seed source control and regulation circuit, and then drive the seed source to work through the seed source output feedback circuit;

[0019] The seed source output feedback circuit is used to read the driving current signal output by the seed source driving circuit in real time, and feed the driving current signal back to the seed source control and regulation circuit, and the seed source control and regulation circuit integrates and regulates the set target driving current signal and the feedback driving current signal output by the seed source driving circuit, thereby controlling the operation of the seed source driving circuit;

[0020] The seed source is used to receive a driving command from a seed source driving circuit and emit laser light with predetermined parameters;

[0021] The power supply is used to provide power to the system.

[0022] Furthermore, the Peltier control and regulation circuit comprises a first voltage follower, a second voltage follower, a PWM generator, a first resistor, a third resistor, a fifth resistor, a sixth resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a fourth capacitor, and a seventh capacitor; the eighth resistor and the third pin of the first voltage follower are connected to the external control input unit, the second pin of the first voltage follower, the first pin of the first voltage follower, and one end of the sixth resistor are connected; the other end of the sixth resistor, the sixth pin of the first voltage follower, and one end of the fifth resistor are connected; the fifth pin of the first voltage follower is connected to the temperature reading circuit; the other end of the fifth resistor, one end of the ninth resistor, the seventh pin of the first voltage follower, and one end of the first resistor are connected; the other end of the ninth resistor is connected to one end of the seventh capacitor; the other end of the seventh capacitor, the other end of the first resistor, one end of the second capacitor, one end of the third resistor, and the sixth pin of the second voltage follower are connected; the other end of the third resistor is connected to one end of the first capacitor; the other end of the second capacitor, the other end of the first capacitor, the seventh pin of the second voltage follower, one end of the fourth capacitor, and the PWM generator are connected, and the PWM generator is connected to the Peltier drive circuit.

[0023] Furthermore, the temperature reading circuit receives the Peltier temperature status signal sent by the temperature sensor and transmits it to the second part of the first voltage follower; the analog voltage value VIN corresponding to the set target temperature is connected to the first part of the first voltage follower for operational amplification and then connected to the second part of the first voltage follower. The analog voltage value VIN after operational amplification is compared and subtracted with the temperature status signal sent by the temperature reading circuit by the second part of the first voltage follower and then proportionally amplified, thereby completing the error proportional amplification in the PID dynamic adjustment; the characteristic of the seventh capacitor is that it passes AC and blocks DC, and the voltage value output by the error proportional amplification link changes in real time. This real-time changing voltage value passes through the loop composed of the ninth resistor and the seventh capacitor and enters the integral-differential adjustment circuit composed of the differential amplifier circuit and the integral circuit.

[0024] Furthermore, the differential amplifier circuit is composed of a ninth resistor, a seventh capacitor, a third resistor, a first capacitor and a second voltage follower, and the integration circuit is composed of a first resistor, a second capacitor and a second voltage follower; the capacitance of the first capacitor is much greater than the capacitance of the second capacitor, and the characteristic of the loop composed of the third resistor and the first capacitor is a resistance characteristic during a voltage mutation; when there is an error between the set target temperature and the actual temperature, the integration circuit will integrate and accumulate the error and feed the integration and accumulation result back to the PWM generator; the differential amplifier circuit increases the driving power of the Peltier drive circuit by amplifying the error between the target temperature and the actual temperature; finally, the output of the differential link is superimposed with the output of the integration link, and the output data is corrected by judging the change trend to ensure the stability of the Peltier drive circuit.

[0025] Furthermore, the Peltier drive circuit is composed of a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a first filter inductor and a second filter inductor; the pin A of the PWM generator + Connected to the first MOS tube, pin A of the PWM generator - Connected to the fourth MOS tube, pin B of the PWM generator + Connected to the third MOS tube, pin B of the PWM generator - The first MOS tube and the second MOS tube are both connected to one end of the Peltier transistor through the second filter inductor, and the third MOS tube and the fourth MOS tube are both connected to the other end of the Peltier transistor through the first filter inductor. The PWM generator receives the output voltage value of the integral-differential regulation circuit and adjusts the duty cycle of the PWM waveform according to the voltage value, thereby driving the first MOS tube, the second MOS tube, the third MOS tube, and the fourth MOS tube to conduct.

[0026] Furthermore, when cooling is required, the PWM waveform emitted by the PWM generator drives the fourth MOS tube and the first MOS tube to turn on, and the current direction is: VCC→fourth MOS tube→first filter inductor→Peltier→second filter inductor→first MOS tube→GND; when heating is required, the PWM waveform emitted by the PWM generator drives and controls the second MOS tube and the third MOS tube to turn on, and the current direction is: VCC→second MOS tube→first filter inductor→Peltier→second filter inductor→third MOS tube→GND.

[0027] Furthermore, the seed source control and regulation circuit is composed of a current detection circuit, a temperature reading circuit, an enable signal, a NAND gate circuit, a reference source, a level switching chip, a thirty-second resistor, a thirty-fourth resistor, a second sliding rheostat, a third sliding rheostat, a twenty-sixth capacitor, a fifty-fifth capacitor, an eighty-ninth capacitor, a ninety-first capacitor, an operational amplifier, a first transistor, and a second transistor; the input end of the enable signal, the temperature reading circuit, and the output end of the current detection circuit are all connected to the NAND gate circuit, the output end of the NAND gate circuit is connected to the delay circuit, the output ends of the delay circuit and the reference source are all connected to the level switching chip, and the output end of the level switching chip is connected to the twenty-sixth capacitor, the thirty-second capacitor, and the eighty-ninth capacitor. The resistor is connected to the negative pole of the power supply, and at the same time, the output end of the level switching chip is connected to the "+" input end of the operational amplifier and one end of the eighty-ninth capacitor through the second sliding rheostat. The thirty-fourth resistor is respectively connected to the current detection circuit, the third sliding rheostat, the ninetieth capacitor, and the "-" input end of the operational amplifier; one end of the fifty-fifth capacitor is connected to the "-" input end of the operational amplifier, and the other end is connected to the out pin of the operational amplifier; the positive end of the power supply voltage is connected to the collector of the first transistor, the emitter of the first transistor is connected to the collector of the second transistor, and the emitter of the second transistor is connected to the negative pole of the power supply; the bases of the first transistor and the second transistor are both connected to the out pin of the operational amplifier.

[0028] Furthermore, the seed source driving circuit consists of a positive end of the power supply voltage, a seed source, a MOS tube, a current sampling resistor, a power supply filter capacitor and a negative pole of the power supply; the positive end of the power supply voltage is connected to the positive pole of the seed source, the negative pole of the seed source is connected to one end of the current sampling resistor, the other end of the current sampling resistor is connected to the negative pole of the power supply, and the positive and negative poles of the power supply filter capacitor are respectively connected to the positive end of the power supply voltage and the negative pole of the power supply.

[0029] Furthermore, the seed source output feedback circuit is composed of a current sampling resistor; one end of the current sampling resistor is connected to the output end of the MOS tube and one end of the thirty-fourth resistor, and the other end of the current sampling resistor is connected to the negative pole of the power supply.

[0030] The present invention provides a driving control method for a picosecond laser seed source, which is implemented using the aforementioned driving control system for a picosecond laser seed source and mainly includes the following steps:

[0031] (1) The system is powered by a power supply, and the external control input unit receives external control commands and sends them to the seed source control and regulation circuit and the Peltier control and regulation circuit respectively;

[0032] (2) The Peltier control and regulation circuit drives the Peltier to work through the Peltier driving circuit according to the external control command; at the same time, the temperature sensor detects the temperature state signal of the Peltier in real time, and transmits the temperature state signal to the temperature reading circuit, and then transmits the temperature state signal of the Peltier to the seed source control and regulation circuit and the Peltier control and regulation circuit through the temperature reading circuit;

[0033] (3) The Peltier control adjustment circuit adjusts the driving power of the Peltier driving circuit according to the feedback temperature state signal and the set target temperature input through the external control input unit using the PID dynamic adjustment method, and then drives the Peltier to work through the Peltier driving circuit, and adjusts the real-time temperature of the seed source through the Peltier, so that the ambient temperature of the seed source is maintained at the target temperature;

[0034] (4) After reading the temperature status signal of the Peltier, the seed source control and regulation circuit determines whether the temperature status signal meets the working conditions of the seed source, and feeds back the temperature status signal of the Peltier to the external control input unit. When the temperature status signal of the Peltier meets the working conditions of the seed source, the seed source control and regulation circuit transmits the judgment result to the external control input unit, and the external control input unit sends a control signal to the seed source control and regulation circuit according to the judgment result; when the light-emitting conditions are met in combination with the Peltier problem state, current state and enable signal state, the seed source control and regulation circuit will send a corresponding control signal to the delay circuit, and control the operation of the seed source drive circuit according to the command returned by the delay circuit.

[0035] (5) The delay circuit receives the working signal transmitted by the seed source control and regulation circuit, and can adjust the start and end time nodes of the electric pulse output by the seed source drive circuit in combination with the manually set control signal, so as to better match the work of the laser amplification unit of the whole machine, that is, the laser energy storage and accumulation part of the whole machine, thereby improving the laser power value of the whole machine; at the same time, the delay circuit transmits the delay state signal to the seed source control and regulation circuit;

[0036] (6) The seed source control and regulation circuit controls the operation of the seed source driving circuit according to the received control signal, temperature state signal and delay state signal; the seed source driving circuit drives the seed source to operate through the seed source output feedback circuit;

[0037] (7) During the operation of the seed source, the seed source output feedback circuit will feed back the driving current signal output by the seed source driving circuit to the seed source control and regulation circuit in real time, and the seed source control and regulation circuit will perform integral adjustment on the set target driving current signal and the feedback driving current signal output by the seed source driving circuit, thereby controlling the operation of the seed source driving circuit.

[0038] The beneficial effects of the present invention are:

[0039] This invention provides a drive control system and drive control method for a picosecond laser seed source, primarily for driving, temperature-controlling, controlling, and protecting the picosecond laser seed source. The invention achieves the following: controlling the seed source to output a reliable and stable waveform; regulating the ambient temperature of the seed source by controlling and driving a Peltier element (TEC); and supporting the control of the delay between the seed source's laser output timing and the discharge of the main circuit xenon lamp.

[0040] The present invention can effectively control and drive the picosecond laser seed source to work according to demand, and can manually set various relevant parameters, including: rising edge, falling edge, pulse width, pulse amplitude, and seed source working environment temperature; through precise and real-time dynamic adjustment of the seed source working environment temperature and setting of the working delay, it is achieved that under high-frequency working conditions, parameters such as the uniformity of the output electric pulse waveform can adapt to the use requirements of the laser equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a block diagram of the structural composition of a driving control system for a picosecond laser seed source provided by the present invention.

[0042] Figure 2 This is the circuit diagram of the temperature control and regulation system.

[0043] Figure 3 Circuit diagram of the seed source control drive system.

[0044] In the figure, 1. power supply; 2. external control input unit; 3. delay circuit; 4. seed source control and regulation circuit; 5. seed source drive circuit; 6. seed source output feedback circuit; 7. seed source; 8. temperature sensor; 9. temperature reading circuit; 10. Peltier control and regulation circuit; 11. Peltier drive circuit; 12. Peltier, 13. circuit board. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below with reference to the accompanying drawings.

[0046] In a first aspect, the present invention provides a driving control system for a picosecond laser seed source.

[0047] like Figure 1As shown, the driving control system of a picosecond laser seed source of the present invention mainly includes the following modules:

[0048] Power supply 1, external control input unit 2, delay circuit 3, seed source control and regulation circuit 4, seed source drive circuit 5, seed source output feedback circuit 6, seed source 7, temperature sensor 8, temperature reading circuit 9, Peltier control and regulation circuit 10, Peltier drive circuit 11, Peltier (TEC) 12 and circuit board 13.

[0049] The external control input unit 2, the delay circuit 3, the seed source control and adjustment circuit 4, the seed source driving circuit 5, the seed source output feedback circuit 6, the seed source 7, the temperature sensor 8, the temperature reading circuit 9, the Peltier control and adjustment circuit 10, the Peltier driving circuit 11 and the Peltier 12 are all installed on the circuit board 13.

[0050] The power supply 1 is respectively connected to the external control input unit 2, the delay circuit 3, the seed source control and adjustment circuit 4, the seed source drive circuit 5, the seed source output feedback circuit 6, the seed source 7, the temperature sensor 8, the temperature reading circuit 9, the Peltier control and adjustment circuit 10, the Peltier drive circuit 11 and the Peltier 12. The power supply 1 is mainly used to provide power to the system.

[0051] The external control input unit 2 is connected to the seed source control and regulation circuit 4 and the Peltier control and regulation circuit 10 respectively. The external control input unit 2 is mainly used to receive external control commands and transmit the received external control commands to the seed source control and regulation circuit 4 and the Peltier control and regulation circuit 10 respectively; at the same time, the set target temperature is input through the external control input unit 2.

[0052] The Peltier control and regulation circuit 10 is connected to the external control input unit 2, the temperature reading circuit 9, and the Peltier drive circuit 11. The Peltier control and regulation circuit 10 is primarily configured to receive external control commands and drive the Peltier 12 to operate via the Peltier drive circuit 11. It is also configured to receive temperature status signals from the Peltier 12 fed back from the temperature reading circuit 9. Based on the fed-back temperature status signals, the Peltier drive circuit 11 is adjusted using a PID dynamic regulation method according to a target temperature set via the external control input unit 2. This in turn drives the Peltier 12 to operate via the Peltier drive circuit 11, and regulates the real-time temperature of the seed source 7 via the Peltier 12, thereby maintaining the ambient temperature of the seed source 7 at the target temperature.

[0053] The Peltier driving circuit 11 is connected to the Peltier control and regulation circuit 10 and the Peltier 12. The Peltier driving circuit 11 is mainly used to receive control instructions from the Peltier control and regulation circuit 10 and provide power to the Peltier 12.

[0054] The Peltier 12 is mounted on the seed source 7 and is connected to the Peltier driving circuit 11 and the temperature sensor 8. As a temperature regulating device, the Peltier 12 is mainly used to adjust the ambient temperature of the seed source 7 in real time.

[0055] The temperature sensor 8 is connected to the temperature reading circuit 9 and the Peltier 12. The temperature sensor 8 is mainly used to detect the temperature status signal of the Peltier 12 in real time and transmit the temperature status signal to the temperature reading circuit 9.

[0056] The temperature reading circuit 9 is connected to the temperature sensor 8 and the Peltier control and adjustment circuit 10. The temperature reading circuit 9 is mainly used to receive the temperature status signal of the Peltier 12 sent by the temperature sensor 8 and transmit it to the seed source control and adjustment circuit 4 and the Peltier control and adjustment circuit 10 respectively.

[0057] The seed source control and regulation circuit 4 is respectively connected to the external control input unit 2, the delay circuit 3, the seed source drive circuit 5, the seed source output feedback circuit 6, and the temperature reading circuit 9. The seed source control and regulation circuit 4 is mainly used to receive external control commands sent by the external control input unit 2; receive the temperature status signal of the Peltier 12 sent by the temperature reading circuit 9, and determine whether the temperature status signal meets the operating conditions of the seed source 7. At the same time, the temperature status signal of the Peltier 12 is fed back to the external control input unit 2. When the temperature status signal of the Peltier 12 meets the operating conditions of the seed source 7, the seed source control and regulation circuit 4 transmits the judgment result to the external control input unit 2, and the external control input unit 2 sends a control signal to the seed source control and regulation circuit 4 based on the judgment result; receive the drive current signal output by the seed source drive circuit 5 fed back by the seed source output feedback circuit 6; and perform integral regulation on the set target drive current signal and the feedback drive current signal output by the seed source drive circuit 5 based on the received control signal and temperature status signal, thereby controlling the operation of the seed source drive circuit 5.

[0058] The delay circuit 3 is connected to the seed source control and regulation circuit 4. The delay circuit 3 is mainly used to receive the working signal transmitted by the seed source control and regulation circuit 4, and can adjust the start time node of the electric pulse of the seed source drive circuit 5 in combination with the manually set control signal; and is used to send a delay status signal to the seed source control and regulation circuit 4.

[0059] The seed source driving circuit 5 is respectively connected to the seed source control and regulation circuit 4 and the seed source output feedback circuit 6. The seed source driving circuit 5 is mainly used to receive the relevant control signal of the seed source control and regulation circuit 4, and then drive the seed source 7 to work through the seed source output feedback circuit 6.

[0060] The seed source output feedback circuit 6 is connected to the seed source 7. The seed source output feedback circuit 6 is mainly used to read the driving current signal output by the seed source driving circuit 5 in real time, and feed the driving current signal back to the seed source control and regulation circuit 4. The seed source control and regulation circuit 4 integrates and adjusts the set target driving current signal and the feedback driving current signal output by the seed source driving circuit 5, thereby controlling the operation of the seed source driving circuit 5.

[0061] As the core part of the system, the seed source 7 is mainly used to receive the driving command of the seed source driving circuit 5 and emit laser with predetermined parameters.

[0062] In the driving control system of a picosecond laser seed source of the present invention, a temperature control and regulation system is composed of a temperature sensor 8, a temperature reading circuit 9, a Peltier control and regulation circuit 10, a Peltier driving circuit 11 and a Peltier 12, which is mainly used to realize closed-loop dynamic regulation control. The circuit of the temperature control and regulation system is as follows: Figure 2 As shown. The Peltier control and regulation circuit 10 is mainly composed of a first voltage follower U1, a second voltage follower U2, a PWM generator U3, a first resistor R1, a third resistor R3, a fifth resistor R5, a sixth resistor R6, an eighth resistor R8, a ninth resistor R9, a first capacitor C1, a second capacitor C2, a fourth capacitor C4 and a seventh capacitor C7; wherein the eighth resistor R8 and the third pin 3 of the first voltage follower U1 are connected to the external control input unit 2, the second pin 2 of the first voltage follower U1, the first pin 1 of the first voltage follower U1, and one end of the sixth resistor R6 are connected; the other end of the sixth resistor R6, the sixth pin 6 of the first voltage follower U1, and one end of the fifth resistor R5 are connected; the first voltage follower The fifth pin 5 of U1 is connected to the temperature reading circuit 9; the other end of the fifth resistor R5, one end of the ninth resistor R9, the seventh pin 7 of the first voltage follower U1, and one end of the first resistor R1 are connected; the other end of the ninth resistor R9 is connected to one end of the seventh capacitor C7; the other end of the seventh capacitor C7, the other end of the first resistor R1, one end of the second capacitor C2, one end of the third resistor R3, and the sixth pin 6 of the second voltage follower U2 are connected; the other end of the third resistor R3 is connected to one end of the first capacitor C1; the other end of the second capacitor C2, the other end of the first capacitor C1, the seventh pin 7 of the second voltage follower U2, one end of the fourth capacitor C4, and the PWM generator U3 are connected, and the PWM generator U3 is connected to the Peltier drive circuit 11.

[0063] The Peltier drive circuit 11 is mainly composed of a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, a first filter inductor L1 and a second filter inductor L2; wherein the pin A of the PWM generator U3 + Connected to the first MOS tube Q1, pin A of the PWM generator U3 -Connected to the fourth MOS tube Q4, pin B of the PWM generator U3 + Connected to the third MOS tube Q3, pin B of PWM generator U3 - The first and second MOS transistors Q1 and Q2 are both connected to one end of a Peltier transistor 12 via a second filter inductor L2. The third and fourth MOS transistors Q3 and Q4 are both connected to the other end of the Peltier transistor 12 via a first filter inductor L1. The Peltier transistor 12 is connected to a temperature sensor 8, which is connected to a temperature reading circuit 9, which is connected to the seed source control and drive system.

[0064] The working principle of the temperature control and regulation system is as follows:

[0065] The temperature sensor 8 detects the temperature status signal of the Peltier 12 in real time and transmits the temperature status signal to the temperature reading circuit 9. The temperature reading circuit 9 receives the temperature status signal of the Peltier 12 sent by the temperature sensor 8 and transmits it to the second part U1.2 of the first voltage follower U1; VIN is the analog voltage value corresponding to the set target temperature input through the external control input unit 2. The analog voltage value VIN is connected to the first part U1.1 of the first voltage follower U1 for operational amplification and then connected to the second part U1.2 of the first voltage follower U1. The analog voltage value VIN after operational amplification is compared with the temperature status signal sent by the temperature reading circuit 9 by the second part U1.2 of the first voltage follower U1, and then proportional amplification is performed after subtraction, thereby completing P (i.e., error proportional amplification) in the PID (proportional-integral-differential control) dynamic adjustment. The temperature status signal detected by the temperature sensor 8 changes with the real-time temperature changes around the Peltier 12. Therefore, before the entire system reaches equilibrium, the temperature status signal fed back by the temperature reading circuit 9 to the second part U1.2 of the first voltage follower U1 is changing. In other words, the voltage value output by the above-mentioned error proportional amplification link changes in real time. When this real-time changing voltage value passes through the loop formed by the ninth resistor R9 and the seventh capacitor C7, since the characteristic of the seventh capacitor C7 is to pass AC and block DC, only when the input voltage value changes will a corresponding change pass through the loop formed by the ninth resistor R9 and the seventh capacitor C7 and enter the integral-differential control circuit.

[0066] The integral-differential regulation circuit consists of a differential amplifier circuit and an integral circuit. The differential amplifier circuit comprises a ninth resistor R9, a seventh capacitor C7, a third resistor R3, a first capacitor C1, and a second voltage follower U2, while the integral circuit comprises the first resistor R1, the second capacitor C2, and the second voltage follower U2. Because the capacitance of the first capacitor C1 is much greater than that of the second capacitor C2, during a sudden voltage change, the circuit formed by the third resistor R3 and the first capacitor C1 primarily exhibits resistance characteristics. The integral circuit's function is to integrate and accumulate any error between the set target temperature and the actual temperature, and feed the accumulated result back to the PWM generator U3 to control the operation of the Peltier drive circuit 11, thereby improving the accuracy of real-time temperature regulation. The differential amplifier circuit can increase the driving power of the Peltier drive circuit 11 and reduce the regulation time by amplifying the error between the target temperature and the actual temperature. The output of the differential link is superimposed with the output of the integral link, and the output data is corrected by determining the trend of change to ensure the stability of the Peltier drive circuit 11.

[0067] The PWM generator U3 receives the output voltage value of the integral-differential regulation circuit and adjusts the duty cycle of the PWM waveform according to the voltage value, thereby driving the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, and the fourth MOS transistor Q4 to conduct. Specifically, when cooling is required, the PWM waveform generated by the PWM generator U3 drives the fourth MOS transistor Q4 and the first MOS transistor Q1 to conduct, and the current direction is: VCC → fourth MOS transistor Q4 → first filter inductor L1 → Peltier 12 → second filter inductor L2 → first MOS transistor Q1 → GND; when heating is required, the PWM waveform generated by the PWM generator U3 drives the second MOS transistor Q2 and the third MOS transistor Q3 to conduct, and the current direction is: VCC → second MOS transistor Q2 → first filter inductor L1 → Peltier 12 →

[0068] The second filter inductor L2 → the third MOS tube Q3 → GND; the current flowing through the Peltier 12 has different directions, which can respectively realize the cooling and heating functions.

[0069] In a driving control system of a picosecond laser seed source of the present invention, the Peltier control and adjustment circuit 10 includes a PID (proportional-integral-differential) dynamic adjustment control circuit, which adopts a high-precision reference source voltage, greatly improving the temperature control accuracy of the system, with an accuracy of ±0.1°C; the driving power output by the Peltier drive circuit 11 is a controllable output of 0-10W, which can achieve positive and negative conduction to achieve cooling or heating, with an adjustable output range, high control accuracy, strong adjustment capability, and fast temperature adjustment speed.

[0070] In the driving control system of a picosecond laser seed source of the present invention, the seed source control driving system is composed of a delay circuit 3, a seed source control and adjustment circuit 4, a seed source driving circuit 5 and a seed source output feedback circuit 6. Its working mode is closed-loop dynamic adjustment, which can obtain an ideal driving waveform. At the same time, the seed source control and adjustment circuit 4 includes an overcurrent protection part. When the seed source driving current reaches a certain value, the system will automatically block and cut off the light output, thereby achieving the purpose of protecting the seed source 7. The circuit of the seed source control driving system is as follows Figure 3 shown.

[0071] like Figure 3 As shown, the seed source control and regulation circuit 4 is mainly composed of a current detection circuit, a temperature reading circuit, an enable signal, a NAND gate circuit, a reference source, a level switching chip, a 32nd resistor R32, a 34th resistor R34, a second sliding variable resistor WR2, a third sliding variable resistor WR3, a 26th capacitor C26, a 55th capacitor C55, an 89th capacitor C89, a 90th capacitor C90, an operational amplifier U6.2, a first transistor Q1 and a second transistor Q2; the connection relationship between these components is: the enable signal input terminal, the temperature reading circuit and the current detection circuit output terminal are all connected to the NAND gate circuit, the NAND gate circuit output terminal is connected to the delay circuit 3, the output terminals of the delay circuit 3 and the reference source are both connected to the level switching chip, and the output terminal of the level switching chip is connected to the power supply through the 26th capacitor C26 and the 32nd resistor R32 Negative electrode GND, at the same time, the output end of the level switching chip is connected to the "+" input end of the operational amplifier U6.2 and one end of the eighty-ninth capacitor C89 through the second sliding rheostat WR2, and the thirty-fourth resistor R34 is respectively connected to the current detection circuit, the third sliding rheostat WR3, the ninetieth capacitor C90, and the "-" input end of the operational amplifier U6.2; one end of the fifty-fifth capacitor C55 is connected to the "-" input end of the operational amplifier U6.2, and the other end is connected to the "out" pin of the operational amplifier U6.2; the positive end of the power supply voltage VCC is connected to the collector of the first transistor Q1, the emitter of the first transistor Q1 is connected to the collector of the second transistor Q2, and the emitter of the second transistor Q2 is connected to the negative electrode of the power supply GND; the bases of the first transistor Q1 and the second transistor Q2 are both connected to the "out" pin of the operational amplifier U6.2.

[0072] like Figure 3As shown, the seed source driving circuit 5 is mainly composed of the positive terminal of the power supply voltage VCC, the seed source, the MOS tube VT1, the current sampling resistor R33, the power supply filter capacitor U7 and the negative power supply GND; the connection relationship between these components is: the positive terminal of the power supply voltage VCC is connected to the positive electrode of the seed source, the negative electrode of the seed source is connected to one end of the current sampling resistor R33, the other end of the current sampling resistor R33 is connected to the negative power supply GND, and the positive and negative electrodes of the power supply filter capacitor U7 are respectively connected to the positive terminal of the power supply voltage VCC and the negative power supply GND.

[0073] like Figure 3 As shown, the seed source output feedback circuit 6 primarily consists of a current sampling resistor R33. One end of the current sampling resistor R33 is connected to the output of the MOS transistor VT1 and one end of the thirty-fourth resistor R34. The other end of the current sampling resistor R33 is connected to the negative power supply GND. The seed source output feedback circuit 6 provides real-time feedback on the current magnitude and pulse waveform flowing through the seed source.

[0074] The NAND gate circuit combines the enable signal, the current detection signal, and the temperature status signal of the Peltier 12 sent by the temperature reading circuit 9 to perform conditional judgment. If the light emission condition is met, it is transmitted to the delay circuit 3 as the light emission control signal. After receiving the light emission control signal, the delay circuit 3 can transmit the trigger signal to the level switching chip according to the manually set delay time and pulse width. The level switching chip controls the reference source voltage to be connected to V-CON according to this trigger signal; the voltage of V-CON and the voltage signal corresponding to the current value sampled by R3 in the seed source output feedback circuit 6 are respectively connected to the "+" and "-" input terminals of the operational amplifier U6.2 for adjustment. The function of the fifty-fifth capacitor C55 is integral adjustment, which can integrate the deviation between the above-mentioned V-CON and the current sampling signal to increase the accuracy of the system.

[0075] The seed source control and adjustment circuit 4 uses a hardware circuit to control the width of the seed source 7 driving pulse to ensure the consistency of each pulse width; at the same time, the circuit adds pulse rising edge time and falling edge time adjustment, which can be adjusted by adjusting Figure 3 The second sliding rheostat WR2 and the third sliding rheostat WR3 can be used to specifically adapt to the deviation of the light-emitting characteristics of the seed source 7 itself. The reference source of the seed source control and regulation circuit 4 can specifically adopt a linear voltage regulator chip, which can obtain an accurate reference voltage value, thereby ensuring the accuracy of the output current.

[0076] The present invention provides a drive control system for a picosecond laser seed source. This system links a temperature control and regulation system with a seed source control and drive system. The temperature control and regulation system provides real-time feedback of the temperature status of the Peltier 12 to the seed source control and drive system, which then determines whether to drive the seed source 7 based on the temperature status of the Peltier 12. Linking the temperature control and regulation system with the seed source control and drive system ensures the stability of the seed source 7's output while reducing the risk of burning the seed source 7 due to excessively high ambient temperatures.

[0077] The present invention provides a driving control system for a picosecond laser seed source, which adapts to the time point when the laser energy storage of the entire device accumulates to a peak value, adds a delay circuit 3 actually driven by the seed source, and ensures that the light emission time of the seed source 7 is consistent with the time point when the laser energy storage of the actual entire device accumulates to a peak value, thereby ensuring that the entire device outputs higher laser energy and power.

[0078] In a second aspect, the present invention provides a driving control method for a picosecond laser seed source, which is implemented using the driving control system for a picosecond laser seed source provided in the first aspect of the present invention.

[0079] A driving control method of a picosecond laser seed source of the present invention specifically comprises the following steps:

[0080] (1) After the circuit board 13 is powered on, the power supply 1 supplies power to the system, and the external control input unit 2 receives the external control command and sends it to the seed source control and regulation circuit 4 and the Peltier control and regulation circuit 10 respectively;

[0081] (2) The Peltier control and regulation circuit 10 drives the Peltier 12 to work through the Peltier driving circuit 11 according to the external control command; at the same time, the temperature state signal of the Peltier 12 is detected in real time through the temperature sensor 8, and the temperature state signal is transmitted to the temperature reading circuit 9, and then the temperature state signal of the Peltier 12 is transmitted to the seed source control and regulation circuit 4 and the Peltier control and regulation circuit 10 through the temperature reading circuit 9;

[0082] (3) The Peltier control and adjustment circuit 10 adjusts the driving power of the Peltier driving circuit 11 according to the feedback temperature state signal and the set target temperature input through the external control input unit 2 using the PID dynamic adjustment method, and then drives the Peltier 12 to work through the Peltier driving circuit 11, and adjusts the real-time temperature of the seed source 7 through the Peltier 12, so that the ambient temperature of the seed source 7 is maintained at the target temperature;

[0083] (4) After reading the temperature status signal of the Peltier 12, the seed source control and regulation circuit 4 determines whether the temperature status signal meets the working conditions of the seed source 7, and feeds back the temperature status signal of the Peltier 12 to the external control input unit 2. When the temperature status signal of the Peltier 12 meets the working conditions of the seed source 7, the seed source control and regulation circuit 4 transmits the judgment result to the external control input unit 2, and the external control input unit 2 sends a control signal to the seed source control and regulation circuit 4 according to the judgment result;

[0084] (5) The delay circuit 3 receives the working signal transmitted by the seed source control and regulation circuit 4, and can adjust the start and end time nodes of the electric pulse output by the seed source drive circuit 5 in combination with the manually set control signal, so as to better match the work of the laser amplification unit of the whole machine, that is, the laser energy storage and accumulation part of the whole machine, thereby improving the laser power value of the whole machine; at the same time, the delay circuit 3 transmits the delay state signal to the seed source control and regulation circuit 4;

[0085] (6) The seed source control and regulation circuit 4 controls the seed source driving circuit 5 to operate according to the received control signal, temperature state signal and delay state signal; the seed source driving circuit 5 drives the seed source 7 to operate through the seed source output feedback circuit 6;

[0086] (7) During the operation of the seed source 7, the seed source output feedback circuit 6 will feed back the driving current signal output by the seed source driving circuit 5 to the seed source control and adjustment circuit 4 in real time, and the seed source control and adjustment circuit 4 will integrate and adjust the set target driving current signal and the feedback driving current signal output by the seed source driving circuit 5, thereby controlling the operation of the seed source driving circuit 5.

[0087] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A driving control system for a picosecond laser seed source, characterized in that: include: Power supply, external control input unit, delay circuit, seed source control and regulation circuit, seed source drive circuit, seed source output feedback circuit, seed source, temperature sensor, temperature reading circuit, Peltier control and regulation circuit, Peltier drive circuit and Peltier; The external control input unit is used to receive and send external control commands to the seed source control and regulation circuit and the Peltier control and regulation circuit, and to input a set target temperature; The Peltier control and adjustment circuit is used to receive an external control command to drive the Peltier to work through the Peltier drive circuit, and is used to receive a temperature state signal of the Peltier fed back by the temperature reading circuit, and is used to adjust the driving power of the Peltier drive circuit according to a set target temperature using a PID dynamic adjustment method based on the fed back temperature state signal, thereby driving the Peltier to work through the Peltier drive circuit, and adjusting the real-time temperature of the seed source through the Peltier to maintain the ambient temperature of the seed source at the target temperature; The Peltier driving circuit is used to receive control instructions from the Peltier control and regulation circuit and provide electrical energy for the Peltier operation; The Peltier is mounted on the seed source and is used to adjust the ambient temperature of the seed source in real time; The temperature sensor is used to detect the temperature status signal of the Peltier in real time and transmit the temperature status signal to the temperature reading circuit; The temperature reading circuit is used to receive the Peltier temperature status signal sent by the temperature sensor and transmit it to the seed source control and regulation circuit and the Peltier control and regulation circuit respectively; The seed source control and regulation circuit is used to receive an external control command sent by an external control input unit, and to receive a temperature status signal of the Peltier sent by a temperature reading circuit, and to judge whether the temperature status signal meets the working conditions of the seed source, and at the same time feed back the temperature status signal of the Peltier to the external control input unit. When the temperature status signal of the Peltier meets the working conditions of the seed source, the seed source control and regulation circuit transmits the judgment result to the external control input unit, and the external control input unit sends a control signal to the seed source control and regulation circuit according to the judgment result, and is used to receive a driving current signal output by the seed source driving circuit fed back by the seed source output feedback circuit, and is used to perform integral regulation on the set target driving current signal and the driving current signal output by the fed back seed source driving circuit according to the received control signal, temperature status signal and delay status signal, thereby controlling the operation of the seed source driving circuit; The delay circuit receives the working signal transmitted by the seed source control and regulation circuit, and adjusts the time nodes of the start and end of the electric pulse of the seed source driving circuit in combination with the manually set control signal, and is used to send corresponding control signals to the seed source control and regulation circuit; the seed source driving circuit is used to receive the relevant control signal of the seed source control and regulation circuit, and then drive the seed source to work through the seed source output feedback circuit; The seed source output feedback circuit is used to read the driving current signal output by the seed source driving circuit in real time, and feed the driving current signal back to the seed source control and regulation circuit, and the seed source control and regulation circuit integrates and regulates the set target driving current signal and the feedback driving current signal output by the seed source driving circuit, thereby controlling the operation of the seed source driving circuit; The seed source is used to receive a driving command from a seed source driving circuit and emit laser light with predetermined parameters; The power supply is used to provide power to the system; The temperature reading circuit receives the Peltier temperature status signal sent by the temperature sensor and transmits it to the second part of the first voltage follower; the analog voltage value VIN corresponding to the set target temperature is connected to the first part of the first voltage follower for operational amplification and then connected to the second part of the first voltage follower. The analog voltage value VIN after operational amplification is compared and subtracted with the temperature status signal sent by the temperature reading circuit by the second part of the first voltage follower, and then proportional amplification is performed, thereby completing the error proportional amplification in PID dynamic regulation; The characteristic of the seventh capacitor is that it passes AC and blocks DC. The voltage value output by the error proportional amplification link changes in real time. This real-time changing voltage value passes through the loop composed of the ninth resistor and the seventh capacitor and enters the integral-differential regulation circuit composed of the differential amplifier circuit and the integral circuit.

2. The driving control system of a picosecond laser seed source according to claim 1, characterized in that: The Peltier control and regulation circuit comprises a first voltage follower, a second voltage follower, a PWM generator, a first resistor, a third resistor, a fifth resistor, a sixth resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a fourth capacitor, and a seventh capacitor; the eighth resistor and the third pin of the first voltage follower are connected to the external control input unit, the second pin of the first voltage follower, the first pin of the first voltage follower, and one end of the sixth resistor are connected; the other end of the sixth resistor, the sixth pin of the first voltage follower, and one end of the fifth resistor are connected; the fifth pin of the first voltage follower is connected to the temperature reading circuit; the other end of the fifth resistor, one end of the ninth resistor, the seventh pin of the first voltage follower, and one end of the first resistor are connected; the other end of the ninth resistor is connected to one end of the seventh capacitor; the other end of the seventh capacitor, the other end of the first resistor, one end of the second capacitor, one end of the third resistor, and the sixth pin of the second voltage follower are connected; the other end of the third resistor is connected to one end of the first capacitor; the other end of the second capacitor, the other end of the first capacitor, the seventh pin of the second voltage follower, one end of the fourth capacitor, and the PWM generator are connected; and the PWM generator is connected to the Peltier drive circuit.

3. The driving control system of a picosecond laser seed source according to claim 1, characterized in that: The differential amplifier circuit is composed of a ninth resistor, a seventh capacitor, a third resistor, a first capacitor, and a second voltage follower, and the integration circuit is composed of a first resistor, a second capacitor, and a second voltage follower; the capacitance of the first capacitor is much greater than the capacitance of the second capacitor, and the characteristic of the loop formed by the third resistor and the first capacitor is a resistance characteristic during a voltage mutation; when there is an error between the set target temperature and the actual temperature, the integration circuit integrates and accumulates the error and feeds the integrated accumulation result back to the PWM generator; the differential amplifier circuit increases the driving power of the Peltier drive circuit by amplifying the error between the target temperature and the actual temperature; finally, the output of the differential link is superimposed with the output of the integration link, and the output data is corrected by judging the change trend to ensure the stability of the Peltier drive circuit.

4. The driving control system of a picosecond laser seed source according to claim 2, characterized in that: The Peltier drive circuit is composed of a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a first filter inductor and a second filter inductor; Pin A of the PWM generator + Connected to the first MOS tube, pin A of the PWM generator - Connected to the fourth MOS tube, pin B of the PWM generator + Connected to the third MOS tube, pin B of the PWM generator - The first MOS tube and the second MOS tube are both connected to one end of the Peltier transistor through the second filter inductor, and the third MOS tube and the fourth MOS tube are both connected to the other end of the Peltier transistor through the first filter inductor. The PWM generator receives the output voltage value of the integral-differential regulation circuit and adjusts the duty cycle of the PWM waveform according to the voltage value, thereby driving the first MOS tube, the second MOS tube, the third MOS tube, and the fourth MOS tube to conduct.

5. The driving control system of a picosecond laser seed source according to claim 4, characterized in that: When cooling is required, the PWM waveform emitted by the PWM generator drives the fourth MOS tube and the first MOS tube to turn on, and the current direction is: VCC → fourth MOS tube → first filter inductor → Peltier → second filter inductor → first MOS tube → GND; when heating is required, the PWM waveform emitted by the PWM generator drives and controls the second MOS tube and the third MOS tube to turn on, and the current direction is: VCC → second MOS tube → first filter inductor → Peltier → second filter inductor → third MOS tube → GND.

6. The driving control system of a picosecond laser seed source according to claim 1, characterized in that: The seed source control and regulation circuit is composed of a current detection circuit, a temperature reading circuit, an enable signal, a NAND gate circuit, a reference source, a level switching chip, a thirty-second resistor, a thirty-fourth resistor, a second sliding rheostat, a third sliding rheostat, a twenty-sixth capacitor, a fifty-fifth capacitor, an eighty-ninth capacitor, a ninety-first capacitor, an operational amplifier, a first transistor and a second transistor; the input end of the enable signal, the temperature reading circuit and the output end of the current detection circuit are all connected to the NAND gate circuit, the output end of the NAND gate circuit is connected to the delay circuit, the output ends of the delay circuit and the reference source are all connected to the level switching chip, and the output end of the level switching chip is connected to the twenty-sixth capacitor, the thirty-second resistor Connected to the negative pole of the power supply, at the same time, the output end of the level switching chip is connected to the "+" input end of the operational amplifier and one end of the eighty-ninth capacitor through the second sliding resistor, and the thirty-fourth resistor is respectively connected to the current detection circuit, the third sliding resistor, the ninetieth capacitor, and the "-" input end of the operational amplifier; one end of the fifty-fifth capacitor is connected to the "-" input end of the operational amplifier, and the other end is connected to the out pin of the operational amplifier; the positive end of the power supply voltage is connected to the collector of the first transistor, the emitter of the first transistor is connected to the collector of the second transistor, and the emitter of the second transistor is connected to the negative pole of the power supply; the bases of the first transistor and the second transistor are both connected to the out pin of the operational amplifier.

7. The driving control system of a picosecond laser seed source according to claim 6, characterized in that: The seed source driving circuit consists of a positive end of the power supply voltage, a seed source, a MOS tube, a current sampling resistor, a power supply filter capacitor and a negative pole of the power supply; the positive end of the power supply voltage is connected to the positive pole of the seed source, the negative pole of the seed source is connected to one end of the current sampling resistor, the other end of the current sampling resistor is connected to the negative pole of the power supply, and the positive and negative poles of the power supply filter capacitor are respectively connected to the positive end of the power supply voltage and the negative pole of the power supply.

8. The driving control system of a picosecond laser seed source according to claim 7, characterized in that: The seed source output feedback circuit is composed of a current sampling resistor; one end of the current sampling resistor is connected to the output end of the MOS tube and one end of the thirty-fourth resistor, and the other end of the current sampling resistor is connected to the negative pole of the power supply.

9. A driving control method for a picosecond laser seed source, implemented by using a driving control system for a picosecond laser seed source according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) The system is powered by a power supply, and the external control input unit receives external control commands and sends them to the seed source control and regulation circuit and the Peltier control and regulation circuit respectively; (2) The Peltier control and regulation circuit drives the Peltier to work through the Peltier driving circuit according to the external control command; at the same time, the temperature sensor detects the temperature state signal of the Peltier in real time, and transmits the temperature state signal to the temperature reading circuit, and then transmits the temperature state signal of the Peltier to the seed source control and regulation circuit and the Peltier control and regulation circuit through the temperature reading circuit; (3) The Peltier control adjustment circuit adjusts the driving power of the Peltier driving circuit according to the feedback temperature state signal and the set target temperature input through the external control input unit using the PID dynamic adjustment method, and then drives the Peltier to work through the Peltier driving circuit, and adjusts the real-time temperature of the seed source through the Peltier, so that the ambient temperature of the seed source is maintained at the target temperature; (4) After reading the temperature status signal of the Peltier, the seed source control and regulation circuit determines whether the temperature status signal meets the working conditions of the seed source, and feeds back the temperature status signal of the Peltier to the external control input unit. When the temperature status signal of the Peltier meets the working conditions of the seed source, the seed source control and regulation circuit transmits the judgment result to the external control input unit, and the external control input unit sends a control signal to the seed source control and regulation circuit according to the judgment result; (5) The delay circuit receives the working signal transmitted by the seed source control and regulation circuit, and can adjust the start and end time nodes of the electric pulse output by the seed source drive circuit in combination with the manually set control signal so as to better match the work of the laser amplification unit of the whole machine, that is, the laser energy storage and accumulation part of the whole machine, thereby improving the laser power value of the whole machine; at the same time, the delay circuit transmits the delay state signal to the seed source control and regulation circuit; (6) The seed source control and regulation circuit controls the operation of the seed source driving circuit according to the received control signal, temperature state signal and delay state signal; the seed source driving circuit drives the seed source to operate through the seed source output feedback circuit; (7) During the operation of the seed source, the seed source output feedback circuit will feed back the driving current signal output by the seed source driving circuit to the seed source control and regulation circuit in real time, and the seed source control and regulation circuit will perform integral adjustment on the set target driving current signal and the feedback driving current signal output by the seed source driving circuit, thereby controlling the operation of the seed source driving circuit.

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