Fuzzy logic based feedback control system for laser beam pointing stabilization

摘要

This paper reports a fuzzy logic based feedback control system for beam pointing stabilization of a high-power nanosecond Nd:YAG laser operating at 30 Hz. This is achieved by generating the correcting signal for each consequent pulse from the error in the pointing position of the previous laser pulse. We have successfully achieved a reduction of beam position fluctuation from +-60 to +-5.0 (mu)rad without the focusing optics and +-0.9 (mu)rad with focusing optics.