Application And Research On Laser Power Control System With Digital All-solid-state Laser

The paper describes a CW, non-cooling, digital all-solid-stated LD pumped Nd:YVO4 driver which adopts microprocessor control, stability power of laser feedback and laser output power about 10mW. The system is composed of constant current source, soft diagram, protection, pulse schematic and laser power feedback loop. By combining appropriate hardware and software, we achieved, in our driver, a variety of protection features including the ability to suppress transients and reduce noise, relay soft and hardware over-current protection and overvoltage shut-off, we have obtained a continuously adjustable laser power output with high accuracy and stability. Meanwhile, we have gained some achievement.1. Based on error variety of nonlinear control curves of LD output laser power by optoelectronic feedback measured, we take advantage of window PID control algorithm to gain high stability of laser power and reduce error amends at mostly.2. The paper achieves effectively high-speed close loop of laser power on digital LD feedback. At that time, We match and harmonize dynamic state and static state relation to gain LD current output powerinstability to ±3%% and internal or external pulse width...