Research On KDP Crystal Q-switched High Voltage Power Supply

Because of the rapid development of Q-switching technology in ignition system,guidance industry and medical industry,and because of the mutual promotion,Q-switching technology has made many breakthroughs in recent years.Nowadays,in order to obtain laser pulses with pulse width up to nanoseconds,giant pulses with peak power higher than megawatt are usually most easily obtained by Q-switching technology.Because of the research and development of new switching tubes,all walks of life are increasingly looking forward to the progress of Q-switching technology,such as laser surgery in medical field,laser cutting in industrial field,laser radar technology in military field,high-speed photography in photography field,etc.The laser technology needed in different fields is also different,some need narrower pulse width,which requires Q-switching inversion technology,and some need Q-switching inversion technology.It needs high power,of course,high frequency output and so on.Because of different requirements,different control systems are needed.Therefore,the research of high voltage power supply with Q-switching crystal becomes very important.Firstly,the basic theory of electro-optic Q-switching is briefly analyzed.The influence of the high voltage power supply with Q-switching of the Pucker box on the output characteristics of the laser is studied.The performance parameters required for the high voltage power supply with Q-switching of the Pucker box are studied.The main contents include the following aspects: The advantages and disadvantages of the current electro-optic crystal Q-switching power supply are analyzed and discussed in order to solve the In this paper,a novel driving method is proposed in the design of electro-optic crystal Q-switched power supply.In the crystal Q-switched high-voltage power supply,a series pulse driven L-C resonant converter circuit is adopted,which overcomes the problems of distributed capacitance and inductance,and solves the problem of excessive real ripple coefficient caused by frequency hopping caused by PWM driving boost.In order to solve these problems,this paper redesigns the voltage-back circuit of Q-switched crystal high-voltage power supply by using VMOS field effect transistor as the core voltage-back device,designs the master-slave voltage-back circuit,effectively solves the problem of voltage-back time and high-voltage resistance of the switch.Question.It greatly simplifies the complexity of the circuit and increases the reliability of the circuit.After the design is completed,the output voltage range and stability of KDP crystal Q-switched high voltage power supply are tested experimentally,and the on-off performance of fast switching circuit is tested for the performance of pulse trigger circuit.A solid-state laser experimental platform was built to cooperate with the design of KDP crystal Q-switched high-voltage power supply,and the electro-optic crystal Q-switched experiment was completed.Experiments show that the KDP crystal Q-switched high voltage power supply designed in this paper is stable and reliable,can achieve constant voltage output,simple structure and fast decompression speed.In the electro-optic Q experiment,the output of Q laser is stable.