Fluorescence feedback control of a diode pumped solid state laser

摘要

We implement active feedback control in a Q-switched diode-pumped Nd:YVO_4 laser by monitoring the fluorescence intensity from the laser crystal. When the initial inversion level indicated by the detected fluorescence has reached a predetermined value, Q-switching is initiated. The Q-switched pulse energy is stabler with our feedback scheme based on the fluorescence intensity than that with the conventional Q-switching when pumping source is not stable.