在连续YAG:Nd3+激光器中,观察到1.06微米红外激光束在空气中产生的可见光轨迹,它在整个可见光谱区具有连续的光谱分布.测定了产生这种效应所必须的激光功率密度阈值.采用腔内机械转盘开关,发现当激光作用时间逐渐变短至毫秒量级时,仍可观察到该现象.

The trace of visible scattering in air induced by a CW1.06m laser beam has been observed inside the cavity of a Nd: YAG laser. The scattering light has a continuous distribution covering the visible spectral range, and the threshold of laser beam power density required for this effect was found. When the period of laser action was reduced to the order of millisecond by using a mechanical rotating switch within the cavity, this effect could still be observed.