PHOTOLUMINESCENCE SPECTRA OF SM3+ AND DY3+ DOPED FLUOROBORATE GLASSES

Two new series of fluoroborate glasses have been prepared from the fol lowing ternary chemical compositions (Na2O+RF+B2O3) with the Sm3+ and the Dy3+ as the dopant ions. The spectral characteristics of these opt ical glasses have been examined by measuring their absorption (NIR) an d fluorescence (Visible) spectra by changing the RF (NaF,NaF+AlF3 and AlF3) in three different ways in the above ternary composition to veri fy the effects from the RF content on the spectral characteristics of the dopants under the UV-radiation from a xenon arc lamp, the Sm3+ gla sses are found in bright orange colour and the Dy3+ glasses in Greenis h-Yellow. The values of the stimulated emission cross-sections (sigma( rho)epsilon) of the fluorescent states of these glasses have been dete rmined by measuring their emission wavelengths (lambda(rho)) and integ rated half band-widths (DELTAlambda(rho)) from the Gaussian curves of the fluorescence transitions.