The influence of ion exchange processing on spectral-lumi nescence properties

properties of material in surface layer always differ from properties in thebulk whether the ion exchange has been conducted or not.Hydrogen ions may penetrate in surface layer both from the salt melt used inthe ion exchange treatment and from ambient air. In oxide glasses hydrogenions form 0-H bonds and 0-H vibrations are known to result in luminescencequenching which is observed in experiment as a decrease in quantum yield andin luminescence lifetime.When developing amplifiers on planar waveguides, it is of value to obtainexperimental information allowing one to estimate the real importance of