Spectral characteristics of Er3+ doped magnesium zinc sulfophosphate glasses

摘要

This paper evaluates the spectroscopic properties of the Erbium (Er3+) ions doped magnesium zinc sulfophosphate glass system synthesized via melt-quenching method. Prepared glass samples are characterized using UV-Vis-NIR absorption and photoluminescence (PL) spectroscopy to determine the Er3+ ions concentration dependent spectral characteristics. The absorption spectra displayed nine prominent absorption bands aroused from the ground state (I-4(15/2)) to the excited state (I-4(13/2), I-4(11/2), I-4(9/2), F-4(9/2), H-2(11/2), F-4(7/2), F-4(3/2), H-2(9/2) and (4)G(11/2)) transitions of Er3+ ion. The intensity parameters (Omega(2), Omega(4) and Omega(6)) and radiative properties associated to the spectral transitions of Er3+ ion are calculated using Judd-Ofelt (JO) expressions. Room temperature PL spectra revealed two significant emission bands centered at 541 and 654 nm. Appearance of luminescence intensity quenching beyond 1 mol% of Er3+ is attributed to the cross-relaxation mechanism. The value of stimulated emission cross-section for (S3/2 -> 4I15/2)-S-4 spectroscopic transition in Er3+ ion is found to be very high (85.8211 x 10(-22) cm(2)). Present glass composition is demonstrated to be advantageous for various photonic applications. (C) 2017 Elsevier B.V. All rights reserved.