VISIBLE SIDE‐LIGHT EMISSION PROPERTIES OF A CO2–N2–He PLASMA INDUCED BY THE CO2 LASER RADIATION FIELD

The effect of laser action, in CO2 laser plasmas, on the spontaneous emission in the visible spectral region is studied by means of a phase‐lock technique. The results reveal that direct collisions between molecules in the primary laser cycle and highly excited states have an important influence on the properties of the plasma.