McCumber analysis of Er3+ doped Al-Ba-Li phosphate glasses for optical amplifier material.

Er3+-doped Al-Ba-Li phosphate glasses were produced using a melt-quenching method. In the current study, the effect of doping Er3+ ion concentration for photoluminescence efficiency and developing compact optical amplifiers operating at 1.53 μ m was investigated. The optical absorption study reveals that ten absorption peaks, showing highest intensity at 522 nm and 980 nm in UV-Vis and NIR regions, respectively. Mc-Cumber theory was used to conduct and analyse the optical absorption measurements obtained. The maximum intensity was observed at 4I 13/2 → 4I 15/2 transition in the wavelength range of 1400–1700 nm, which is monitored using 980 nm. The highest emission intensity was observed for 1.5 mol% of Er3+ ions doped glass in the NIR emission spectra. The McCumber theory was applied to evaluate the emission cross-sections; for 1.5 mol% of Er3+ ions, the emission cross-section and gain bandwidth value show 9.02 10−21 cm2 and 1.16 1025 cm3 respectively. When the concentration of Er3+ ions increased from 0.1, 0.5, 1.0, 1.5, and 2.0 mol%, respectively, the lifetime () of the 4I 13/2 level reduced from 1.45, 1.19, 0.93, 0.72, and 0.63 ms. The population inversion values show larger than 0.4, suggesting their potential suitability in broadband amplifiers used in C-band communication for a typical population inversion of more than 40%. Phosphate glass doped with Er3+ ions at a concentration of 1.5 mol% doped glass being potential candidate for solid-state optical amplifying devices. [ABSTRACT FROM AUTHOR]