Longer lifetime of Er3+/Yb3+ co-doped fluorophosphate glasses for optical amplifier applications

• Published in: Journal of non-crystalline solids 2017-09, Vol.471, p.65-71
• Main Authors: Linganna, K., Agawane, G.L., Choi, Ju H.
• Format: Article
• Language: English
• Subjects: Absorption and emission cross-sections; Er/Yb ions; Fluorophosphate glasses; Lifetime
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2017.05.012

Er3+/Yb3+ co-doped fluorophosphate glasses with the molar composition of Mg(PO3)2-(50-x)BaF2-CaF2:3ErF3/xYbF3, where x=3, 4, 5, 6, 7, 8 and 9mol%, were prepared by a conventional melt quenching technique and studied their spectroscopic properties for fiber amplifier applications. The strong emission band at 1.53μm corresponding to 4I13/2→4I15/2 transition of Er3+ ion was observed for all the studied glasses and found the optimized Er/Yb concentration of 3:4. The emission cross-section of 1.53μm emission band was calculated to be of the order of 2.60×10−20cm2 by using the McCumber theory. The effective bandwidth was found to be of the order of 84 nm. To the best of our knowledge, for the first time, longer excited state lifetime (t=~15ms) for the 4I13/2 level of Er3+ ion was noticed for the optimized Er3+/Yb3+ co-doped fluorophosphate glasses. Those results were compared to the other host matrices and found that the investigated fluorophosphate glasses are promising and attractive as gain media for laser and fiber amplifier applications. •We successfully prepared and characterized Er/Yb co-doped fluorophosphate glasses.•The spectroscopic properties were evaluated for the prepared glasses.•The effective bandwidth for the 4I13/2→4I15/2 transition was found to be ~84nm.•The emission cross-section was found to be 2.58×10−20cm2 (Er:Yb=3:4).•The longer lifetime for 4I13/2 level was found to be 16.58ms (Er:Yb=3:4).