1.06 μ m NIR emission of Nd 3+- embedded in mixed alkali borate glasses for lasing application

초록

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 I-4(9/2) -> (4)G(5/2)+(2)G(7/2) transition demonstrated the highest absorbance compared to other transitions. Near-infrared (NIR) fluorescence measurements of the revealed a strong NIR emission at 1.06 mu m corresponding to F-4(3/2)-> I-4(11/2) 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 Omega(4) > Omega(6)> Omega(2), indicating the rigid nature of the present glasses. The radiative properties at 1061 nm were determined as as A(R) = 6359 s(-1), beta(Rexp) = 0.808, and sigma(e) = 9.75 x 10(-20) cm(2). 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 mu m lasing applications.

키워드