Spectroscopic investigations on Yb3+ doped and pr3+/Yb3+ codoped tellurite glasses for photonic applications

• 作者: M.Seshadri M.J.V.Bell V.Anjos Y.Messaddeq
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: SPECTROSCOPY,LUMINESCENCE AND PHOSPHORS
• 页码范围: 33-42
• 页数: 10页
• 语种: 英文

摘要

In this work,we report on structural and spectroscopic properties of Yb3+ doped and pr3+/Yb3+ co-doped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses.Bending and stretching modes of TeO2 and Te-OH bond (strong and weak) were analysed from the deconvolution of observed Raman and Fr-IR spectra.Based on the absorption measurements,the energy bands of Yb3+ and Pr3+ ions are assigned.The spectroscopic properties for the radiative transitions of Yb3+ and Pr3+ ions were reported using McCumber and Judd-Ofelt theories.Visible emission bands originating from 3P1 and 3P0 to lower lying levels of Pr3+ were registered under 447 nm excitation.The emission band around 1334 nm assigned to the pr3: 1G4→3H5 was observed when excited at 980 nm.The stimulated emission cross-section (σemi(λ)) and effective linewidth (△λeff) for the 3p1→3H6,3p1→3H5,3p0→3H6,3p0→3F2,3P13F3,3p1→3F4,3P0→3F4 and 1G4→3H5 transitions of Pr3+ are reported.Upconversion luminescence in Pr3+/Yb3+ codoped glass upon 980 nm excitation was measured.Possible resonant transfer processes between Yb3+ and Pr3+ ions are presented and discussed.The chromaticity co-ordinates were also evaluated from the visible emission spectra showing that pr3+/Yb3+ co-doped glass may be suitable for the development of yellow-orange (λexc =447 nm) and near white light (λexc =980 nm) emitting devices in photonics.