SPECTROSCOPIC PROPERTIES OF Yb3+ DOPED PHOSPHATE GLASS PREPARED BY SOL-GEL METHOD

Abstract

Glass based Yb³⁺ doped P₂O₅-Al₂O₃-Na₂O has successfully been prepared by sol-gel method. Their spectroscopic properties have been investigated using UV-Vis Spectroscopy and IR Spectroscopy. It is found that the transmission cut-off varied from 300 nm - 400 nm and is very much depend on the Yb³⁺ contents. The vibrational frequency of Yb³⁺ doped P₂O₅-Al₂O₃-Na₂O spectrum are the PO₂ asymmetric stretching vibration band at 1280 cm−1, νas(PO₂), the PO₂ symmetric stretching vibration band at 1211 cm−1, νs(PO₂), the νas(PO₃₎ groups (chain-end groups) at 1100 cm⁻¹, the νs of PO₃ groups near 1020 cm⁻¹, the νas of POP groups at 980 cm⁻¹, the νs of POP groups at 773 and 730 cm⁻¹ and the deformation modes groups at 545 and 496 cm⁻¹.