Simulation and Analysis of Pulse Driving Circuit for Semiconductor Laser

Abstract

Aiming at the problem of how to provide high amplitude, short pulse width and high stability driving power supply for semiconductor lasers, this paper proposes a method to realize constant current pulse output by combining buck circuit, energy storage network and linear regulation module. The hysteresis control of buck circuit is used to control the voltage of energy storage capacitor, and then the PI module is used to adjust the MOSFET working in the linear region to ensure the constant current output on the load. PSPICE software is used to simulate and analyze the designed pulse driving circuit. Through simulation, we can clearly and intuitively understand the influence of various parameters in the circuit on the circuit, so as to optimize the circuit design. The simulation results show that the circuit can achieve high-power pulse constant current output with amplitude of 30A and rise time of 3us on the semiconductor laser load, which provides a reference for the subsequent actual circuit test.