Abstract

The optical emission with the continuum spectrum takes place for the dense plasma of optical discharge that has been created and maintained by laser irradiation in the bulk of transparent condensed media, containing oxygen or carbon in its chemical formula.¹ Usually, there are no such discharges in other materials, in particular halogenides, in which plasma parameters rather correspond to plasma of erosive laser plume, having the discrete emission spectrum and more high temperature. Using mixed targets we have extended a set of substances in which the optical discharges take place. We have also explored a smooth transition from the electron-ion plasma of erosive laser plume to the dense cation-an-ion plasma of an optical discharge. We have studied concentration dependencies of the optical emission with continuum spectrum and elastic light scattering by compressed powders, heated by laser radiation. In the majority of cases the dependencies have the percolation type.

© 1994 IEEE