Driving control system and driving control method of picosecond laser seed source

Abstract

The invention discloses a driving control system and a driving control method of a picosecond laser seed source, and belongs to the field of picosecond laser seed sources. The Peltier control adjusting circuit adjusts the driving power of the Peltier driving circuit according to the temperature state signal and the target temperature by utilizing a PID dynamic adjusting method, and the Peltier adjusts the real-time temperature of the seed source so that the environment temperature of the seed source is maintained at the target temperature; the seed source control adjusting circuit judges whether the temperature state signal meets the working condition of the seed source or not; and the seed source output feedback circuit feeds the driving current signal back to the seed source control and regulation circuit in real time and integrates the target driving current signal and the output driving current signal to control the seed source driving circuit. According to the invention, the working environment temperature of the seed source is accurately and dynamically adjusted in real time and the working delay is set, so that parameters such as waveform uniformity of electric pulses output in a high-frequency working state can meet the use requirements of laser equipment.

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] P-second laser is a picosecond laser, which is a laser with a pulse width of picoseconds. It has the advantages of high accuracy, fast recovery and little damage. It is widely used in dermatology, as follows: whitening and removing spots, tattoos, facial fine lines, skin rejuvenation, treatment of acne, scars and photoaging, etc. Because of its above series of advantages, it has extremely high research and development and use value.

[0003] As an important part of laser equipment, picosecond laser seed source is usually used to generate high-intensity laser pulses in an extremely short time. The main function of this high-intensity laser pulse is to serve as a 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 value, 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 control parts of the picosecond laser seed source. The related laser parameters have a great influence on the generation and quality of the laser. Among them, the factors affecting the output laser parameters of the seed source mainly include: the stability of the ambient temperature, the start time of the driving pulse, the pulse width of the driving seed source, the rising edge time, the falling edge time, the flatness 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 the working connection between the key parts is not tight enough, which makes it cumbersome to use, difficult to achieve the final effect, and the stability of the seed source output waveform is insufficient; 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 solution adopted by the present invention to solve the technical problem is 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 driving circuit, and is used to receive the temperature state signal of the Peltier fed back by the temperature reading circuit, and is used to adjust the driving power of the Peltier driving circuit according to the set target temperature using the PID dynamic adjustment method according to the fed back temperature state signal, and then drive the Peltier to work through the Peltier driving circuit, and adjust 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;

[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 state 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 state signal of the Peltier sent by a temperature reading circuit, and to judge whether the temperature state signal meets the working conditions of the seed source, and to feed back the temperature state signal of the Peltier to the external control input unit. When the temperature state 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 state signal, the set target driving current signal and the driving current signal output by the seed source driving circuit fed back, so as to control 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 artificially 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 driving current signal output by the feedback 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 a laser with predetermined parameters;

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

[0022] Further, the Peltier control and regulation circuit is composed of 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, and the analog voltage value VIN after operational amplification is compared and subtracted with the temperature status signal sent by the temperature reading circuit through 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, and the voltage value output by the error proportional amplification link changes in real time. This real-time changing voltage value passes through a loop composed of a ninth resistor and a seventh capacitor and enters an integral-differential regulation circuit composed of a differential amplifier circuit and an 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 larger 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 back the integrated accumulation result 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 tube, a second MOS tube, a third MOS tube, a fourth MOS tube, 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 connected to one end of the Peltier through the second filter inductor, and the third MOS tube and the fourth MOS tube are connected to the other end of the Peltier through the first filter inductor; the PWM generator receives the output voltage value of the integral-differential adjustment 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] Further, 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, the eighty-ninth capacitor, the ninety-third capacitor, an operational amplifier, a first transistor and a second transistor. 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 is composed of a positive end of a power supply voltage, a seed source, a MOS tube, a current sampling resistor, a power supply filter capacitor and a negative power supply; the positive end of the power supply voltage 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, the other end of the current sampling resistor is connected to the negative power supply, and the positive and negative electrodes of the power supply filter capacitor are respectively connected to the positive end of the power supply voltage and the negative 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 by using the driving control system of the picosecond laser seed source, and mainly includes the following steps:

[0031] (1) The power supply is used to power the system, and the external control input unit receives the external control command and sends it 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 state signal of the Peltier is detected in real time through the temperature sensor, and the temperature state signal is transmitted to the temperature reading circuit, and then the temperature state signal of the Peltier is transmitted 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 set target temperature input through the external control input unit using the PID dynamic adjustment method based on the feedback temperature state signal, 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 seed source drive circuit to work 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 whole machine laser amplification unit, that is, the whole machine laser energy storage and accumulation part, 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 seed source driving circuit to work according to the received control signal, temperature state signal and delay state signal; the seed source driving circuit drives the seed source to work 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] The present invention provides a driving control system and driving control method for a picosecond laser seed source, which are mainly used to realize driving, temperature control, control and protection of a picosecond laser seed source. The present invention can realize the following points: controlling the seed source to output a reliable and stable waveform; adjusting the ambient temperature of the seed source application by controlling and driving the Peltier (TEC); supporting the control of the delay between the seed source output laser time node and the main circuit xenon lamp discharge.

[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 A structural block diagram 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 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 in conjunction with 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, a 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 adjustment circuit 10 is respectively connected to the external control input unit 2, the temperature reading circuit 9 and the Peltier driving circuit 11. The Peltier control and adjustment circuit 10 is mainly used to receive an external control command to drive the Peltier 12 to work through the Peltier driving circuit 11; and to receive the temperature state signal of the Peltier 12 fed back by the temperature reading circuit 9; and to adjust the driving power of the Peltier driving circuit 11 according to the set target temperature input through the external control input unit 2 using the PID dynamic adjustment method according to the fed back temperature state signal, and then drive the Peltier 12 to work through the Peltier driving circuit 11, and adjust 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.

[0053] The Peltier driving circuit 11 is respectively 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 electric energy for the Peltier 12 to work.

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

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

[0057] The seed source control and regulation circuit 4 is respectively connected with the external control input unit 2, the delay circuit 3, the seed source driving 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 the external control command sent by the external control input unit 2; and to receive the temperature state signal of the Peltier 12 sent by the temperature reading circuit 9, and to judge whether the temperature state signal meets the working conditions of the seed source 7, and to feed back the temperature state signal of the Peltier 12 to the external control input unit 2. When the temperature state 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; and to receive the driving current signal output by the seed source driving circuit 5 fed back by the seed source output feedback circuit 6; and to perform integral adjustment on the set target driving current signal and the driving current signal output by the seed source driving circuit 5 fed back according to the received control signal and temperature state signal, so as to control the operation of the seed source driving 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 electric pulse start time node of the seed source driving circuit 5 in combination with the artificially set control signal; and is used to send a delay state 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, and the seed source control and regulation circuit 4 integrates and regulates the set target driving current signal and the driving current signal output by the feedback seed source driving circuit 5, thereby controlling the operation of the seed source driving circuit 5.

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

[0062] In a 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 and 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 the PWM generator U3 - The first MOS tube Q1 and the second MOS tube Q2 are connected to one end of the Peltier 12 through the second filter inductor L2, and the third MOS tube Q3 and the fourth MOS tube Q4 are connected to the other end of the Peltier 12 through the first filter inductor L1. The Peltier 12 is connected to the temperature sensor 8, the temperature sensor 8 is connected to the temperature reading circuit 9, and the temperature reading circuit 9 is connected to the seed source control drive system.

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

[0065] The temperature sensor 8 detects the temperature state signal of the Peltier 12 in real time, and transmits the temperature state signal to the temperature reading circuit 9. The temperature reading circuit 9 receives the temperature state 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 and subtracted with the temperature state signal sent by the temperature reading circuit 9 through the second part U1.2 of the first voltage follower U1, and then proportionally amplified, thereby completing P (i.e. error proportional amplification) in the PID (proportional-integral-differential regulation) dynamic regulation. Among them, the temperature state signal detected by the temperature sensor 8 will change with the real-time temperature change around the Peltier 12, so before the entire system reaches equilibrium, the temperature state signal fed back by the temperature reading circuit 9 to the second part U1.2 of the first voltage follower U1 is changing, that is, the voltage value output by the above-mentioned error proportional amplification link is changing in real time. When this real-time changing voltage value passes through the loop composed of 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 there be a corresponding change through the loop composed of the ninth resistor R9 and the seventh capacitor C7 Enter the integral-differential adjustment circuit.

[0066] The integral-differential regulation circuit is composed of a differential amplifier circuit and an integral circuit, wherein the differential amplifier circuit is composed of a ninth resistor R9, a seventh capacitor C7, a third resistor R3, a first capacitor C1 and a second voltage follower U2, and the integral circuit is composed of a first resistor R1, a second capacitor C2 and a second voltage follower U2. Since the capacitance of the first capacitor C1 is much greater than the capacitance of the second capacitor C2, in the process of voltage mutation, the loop composed of the third resistor R3 and the first capacitor C1 mainly reflects the resistance characteristic. The function of the integral circuit is: as long as there is an error between the set target temperature and the actual temperature, the integral circuit will integrate and accumulate the error, and feed back the integral accumulation result to the PWM generator U3, thereby controlling the operation of the Peltier drive circuit 11, thereby improving the accuracy of real-time temperature regulation; and the differential amplifier circuit can increase the driving power of the Peltier drive circuit 11 and reduce the adjustment 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 judging the change trend to ensure the stability of the operation 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 tube Q1, the second MOS tube Q2, the third MOS tube Q3, and the fourth MOS tube Q4 to turn on; specifically, when cooling is required, the PWM waveform emitted by the PWM generator U3 drives the fourth MOS tube Q4 and the first MOS tube Q1 to turn on, and the current direction is: VCC→the fourth MOS tube Q4→the first filter inductor L1→Peltier 12→the second filter inductor L2→the first MOS tube Q1→GND; when heating is required, the PWM waveform emitted by the PWM generator U3 drives and controls the second MOS tube Q2 and the third MOS tube Q3 to turn on, and the current direction is: VCC→the second MOS tube Q2→the 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, and 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 regulation circuit 10 includes a PID (proportional-integral-differential regulation) dynamic regulation control circuit, and adopts a high-precision reference source voltage, which greatly improves the temperature control accuracy of the system, and the accuracy can reach ±0.1°C; the driving power output by the Peltier driving circuit 11 is a controllable output of 0-10W, which can realize positive and negative conduction to achieve cooling or heating, and the output range is adjustable, the control accuracy is high, the regulation ability is strong, and the temperature regulation speed is fast.

[0070] In a driving control system of a picosecond laser seed source of the present invention, a 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 a closed-loop dynamic adjustment, and an ideal driving waveform can be obtained. 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 thirty-second resistor R32, a thirty-fourth resistor R34, a second sliding rheostat WR2, a third sliding rheostat WR3, a twenty-sixth capacitor C26, a fifty-fifth capacitor C55, an eighty-ninth capacitor C89, a ninetieth 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 output terminal of the current detection circuit are all connected to the NAND gate circuit, the output terminal of the NAND gate circuit 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 twenty-sixth capacitor C26 and the thirty-second 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 is mainly composed of a current sampling resistor R33; one end of the current sampling resistor R33 is connected to the output end of the MOS tube VT1 and one end of the thirty-fourth resistor R34, and the other end of the current sampling resistor R33 is connected to the negative electrode GND of the power supply. The seed source output feedback circuit 6 can provide real-time feedback on the current size and pulse waveform flowing through the seed source.

[0074] The NAND gate circuit combines the enable signal, the current detection signal and the temperature state signal of the Peltier 12 sent by the temperature reading circuit 9 to make a conditional judgment. When the light emitting condition is met, it is transmitted to the delay circuit 3 as a light emitting control signal. After receiving the light emitting 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 signal corresponding to the current value sampled by R3 in the seed source output feedback circuit 6 and the voltage signal of V-CON 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 driving pulse width of the seed source 7 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 emission characteristics of the seed source 7. The reference source of the seed source control and adjustment 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 driving control system for a picosecond laser seed source, which connects a temperature control and adjustment system with a seed source control and drive system, and feeds back the temperature state of the Peltier 12 to the seed source control and drive system in real time through the temperature control and adjustment system, and the seed source control and drive system determines whether to drive the seed source 7 to work according to the temperature state of the Peltier 12. By connecting the temperature control and adjustment system with the seed source control and drive system, the stability of the output of the seed source 7 can be ensured, and the risk of burning the seed source 7 due to excessively high ambient temperature can be reduced.

[0077] The present invention provides a driving control system of a picosecond laser seed source, which adapts to the time point when the laser energy storage of the whole device accumulates to a peak value, adds a delay circuit 3 actually driven by the seed source, ensures the light emission time of the seed source 7 and the time point when the laser energy storage of the actual whole device accumulates to a peak value, thereby ensuring that the whole 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 by using a 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 by using the PID dynamic adjustment method according to the feedback temperature state signal and the set target temperature input through the external control input unit 2, 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 state signal of the Peltier 12, the seed source control and regulation circuit 4 determines whether the temperature state signal meets the working conditions of the seed source 7, and feeds back the temperature state signal of the Peltier 12 to the external control input unit 2. When the temperature state 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 adjustment 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 whole machine laser amplification unit, that is, the whole machine laser energy storage and accumulation part, 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 adjustment circuit 4;

[0085] (6) The seed source control and regulation circuit 4 controls the seed source driving circuit 5 to work 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 work 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 perform integral adjustment on 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 principle of the present invention. These improvements and modifications should also be regarded as 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 driving circuit, and is used to receive the temperature state signal of the Peltier fed back by the temperature reading circuit, and is used to adjust the driving power of the Peltier driving circuit according to the set target temperature using the PID dynamic adjustment method according to the fed back temperature state signal, and then drive the Peltier to work through the Peltier driving circuit, and adjust 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; 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 state 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 state signal of the Peltier sent by a temperature reading circuit, and to judge whether the temperature state signal meets the working conditions of the seed source, and to feed back the temperature state signal of the Peltier to the external control input unit. When the temperature state 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 seed source driving circuit fed back according to the received control signal, temperature state signal and delay state signal, so as to control 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 artificially set control signal, and is used to send the corresponding control signal 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 driving current signal output by the feedback 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 a laser with predetermined parameters; The power supply is used to provide power to the system.

2. A driving control system for a picosecond laser seed source according to claim 1, characterized in that: The Peltier control and regulation circuit is composed of 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 2, characterized in that: The temperature reading circuit receives the Peltier temperature state 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, and the analog voltage value VIN after operational amplification is compared and subtracted with the temperature state signal sent by the temperature reading circuit through the second part of the first voltage follower, and then proportionally amplified, 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.

4. The driving control system of a picosecond laser seed source according to claim 3, 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 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 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.

5. 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; 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 connected to one end of the Peltier through the second filter inductor, and the third MOS tube and the fourth MOS tube are connected to the other end of the Peltier through the first filter inductor; the PWM generator receives the output voltage value of the integral-differential adjustment 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.

6. The driving control system of a picosecond laser seed source according to claim 5, 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.

7. 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, 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 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.

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

9. The driving control system of a picosecond laser seed source according to claim 8, 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 electrode of the power supply.

10. 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 9, characterized in that: The following steps are involved: (1) The power supply is used to power the system, and the external control input unit receives the external control command and sends it 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 state signal of the Peltier is detected in real time through the temperature sensor, and the temperature state signal is transmitted to the temperature reading circuit, and then the temperature state signal of the Peltier is transmitted 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 set target temperature input through the external control input unit using the PID dynamic adjustment method based on the feedback temperature state signal, 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 state signal of the Peltier, the seed source control and regulation circuit determines whether the temperature state signal meets the working conditions of the seed source, and feeds back the temperature state signal of the Peltier to the external control input unit. When the temperature state 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 driving circuit in combination with the manually set control signal so as to better match the work of the whole machine laser amplification unit, that is, the whole machine laser energy storage and accumulation part, 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 seed source driving circuit to work according to the received control signal, temperature state signal and delay state signal; the seed source driving circuit drives the seed source to work 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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