Enhanced 1.32 μm fluorescence and broadband amplifying for O-band optical amplifier in Nd~（3＋）-doped tellurite glass

• Published in: 光电子快报：英文版 2017, Vol.13 (1), p.54-57
• Main Author: 周自忠 周明翰 苏秀娥 程盼 周亚训
• Format: Article
• Language: English
• ISSN: 1673-1905; 1993-5013

WO3 oxides with relatively high phonon energy and different concentrations were introduced into the Nd^3＋-doped tellurite-based glasses of Te O2-Zn O-Na2 O to improve the 1.32 μm band fluorescence emission. The absorption spectra,Raman spectra,1.32 μm band fluorescence spectra and differential scanning calorimeter（DSC） curves were measured,together with the Judd-Ofelt intensity parameters,stimulated emission and gain parameters were calculated to evaluate the effects of WO3 amount on the glass structure and spectroscopic properties of 1.32 μm band fluorescence. It is shown that the introduction of an appropriate amount of WO3 oxide can effectively improve the 1.32 μm band fluorescence intensity through the enhanced multi-phonon relaxation（MPR） processes between the excited levels of Nd^3＋. The results indicate that the prepared Nd^3＋-doped tellurite glass with an appropriate amount of WO3 oxide is a potential gain medium applied for the O-band broad and high-gain fiber amplifier.