Photoluminescence emission studies on samarium activated bismuth-fluoro phosphosilicate glasses and glass-ceramics for orange solid state lasers

Glasses (P2O5+NaF2+SiO2+Bi2O3, doped with Y2O3 and Sm2O3::PNSiBi, PNSiBiY, PNSiBiSm and PNSiBiYSm) and PNSiBiYSm glass-ceramics (GC) were prepared by melt-quenching procedure. FTIR spectrum of PNSiBi05 glass was used to study the functional groups and its transparency (%). From the FTIR spectrum the band at 503 cm-1 is attributed to asymmetric bending vibrations of PO43 units. Highest photoluminescence (PL) emission intensity for the transition 4G5/2 → 6H9/2 level was perceived at 598 nm for Sm3+ ions in PNSiBi05Sm01 glass compared to PNSiBi10Sm01 and PNSiBi15Sm01 glasses due to color change property of Bi2+ ions with increase of Bi concentration. PNSiBi05Y05Sm01 glass and PNSiBi05Y05Sm01GC are shown increased emission intensity than PNSiBi10Sm01 and PNSiBi15Sm01 glasses. PNSiBi05Y05Sm01GC reported emission intensity mostly equal with the intensity of PNSiBi05Sm01 glass. Crystallinity due to the formation of NaF2, NaYF4 and YF3nanocrystalsand high activation energy of PNSiBi05Y05Sm01GC would recommend significant for orange solid state lasers.