a result at the high light power, up to reveral watts. a water
cooling or the plasma tuho is necessary. In practice a laser wavelength with
the highest light power is chmcn. The required power depends on the optical
equipment Le. the diameter oi the expanded light beams; and on thr, time,
dependence of the investigated physical phenomenon, es o high light power
loads to a low exposure time. It is advciitageous to have power over Lho light
source, since the uxpusuru tiruo (um then he adapted to the optical set—up and
photographic plates. The laser should be fixed on a sepiu'ate table in order
to avald vibrations of the optich set up that may be caused by the cooling
system of the laser.