一种宽带拉曼放大碲酸盐玻璃的拉曼散射特性

The flattening and broadening effects of Ga<inf>2</inf>O<inf>3</inf>, GeO<inf>2</inf>, P2O5 in TeO<inf>2</inf>-BaCO<inf>3</inf>-SrCO<inf>3</inf>- Nb<inf>2</inf>O<inf>5</inf> (TBSN) glass system were studied. The results showed that P<inf>2</inf>O<inf>5</inf> can broaden the vibration band in Raman spectra and Ga<inf>2</inf>O<inf>3</inf>, GeO<inf>2</inf> can flatten the spectra compared with TBSN glass. And also, they can extend the main vibration band and decrease the vibration intensity of 730 cm^-1 and 780 cm^-1 nonbridging oxygen connected with Te. They also make for the decrease of flatness in 600-870 cm^-1 vibration band and GeO<inf>2</inf> has larger effect than Ga<inf>2</inf>O<inf>3</inf> in weakening the vibration of nonbridging oxygen.