1.06 μm NIR emission of Nd3+−embedded in mixed alkali borate glasses for lasing application

The Nd3+-embedded in mixed alkali borate glasses (LNKBNd) were synthesized by melt quenching technique. The physical, optical and near-infrared luminescence properties were analyzed. The density, refractive index and optical absorption intensity were found to increase with Nd3+ concentration. The 4I9/2 → 4G5/2+2G7/2 transition demonstrated the highest absorbance compared to other transitions. Near-infrared (NIR) fluorescence measurements of the revealed a strong NIR emission at 1.06 μm corresponding to 4F3/2→4I11/2 transition when excited with an 808 nm diode laser, and the maximum emission intensity was obtained from the LNKBNd glass with 0.5 mol% of Nd3+. The Judd-Ofelt theory (JO) was applied for calculating the cross-section of stimulated emissions of the LNKBNd glass with 0.5 mol% of Nd3+. The trend of JO parameters was found as Ω4 > Ω6> Ω2, indicating the rigid nature of the present glasses. The radiative properties at 1061 nm were determined as as AR = 6359 s-1, βRexp = 0.808, and σe = 9.75 × 10-20 cm2. The obtained results suggested that the 0.5 mol% of Nd3+ -embedded in LNKBNd glass has a potential for use as pivotal luminescent devices in the 1.06 μm lasing applications.