and centres in KCl and KBr doped with either carbonates or sulphates

Abstract

In the present paper, it is shown experimentally: (i) that laser-active and centres may be produced with significant concentrations in -doped KBr (as was already known for -doped KCl); and (ii) that, in contradistinction to the results reported previously, large optical densities of and centres can be obtained in sulphate-doped alkali halides (KCl or KBr).