Spectroscopy Study of Bismuth Lithium Strontium Borate Glasses Doped with Nd3+ Ions for 1.06μm NIR Emitting Glasses

Abstract

7Bi₂O₃-3.3Li₂O-23SrO-(66.7-x) B₂O₃-xNd₂O₃ (where x= 0.0 (Nd0.0), 0.1 (Nd0.1), 0.3 (Nd0.3), 0.5 (Nd0.5) and 1 (Nd1.0) mol %) have been synthesized. Confirmation of unstructured nature of the glass was analyzed using XRD. Glass transition was obtained from differential scanning calorimeter for base glass and 1.0 mol% Nd₂O₃ content. UV-Vis-NIR studies were performed and studied Tauc plot with increase in Nd₂O₃concentration. Judd-Ofelt (JO) parameters Ω_λ (λ = 2, 4, and 6) were determined and have the following trend Ω₆>Ω₂>Ω₄. All glass systems have been evaluated with amplification factor and found to be greater than unity. The present glasses doped with Nd³⁺ ion glass show best emission spectral intensity at ⁴F_3/2 → ⁴I_11/2 (1060nm) with an excellent radiative transition probability. Using Judd-Ofelt intensity parameters, and emission spectrum the probabilities of radiative transition (A_R), lifetimes (τ_rad), full-width half maximum (Δλ_eff) and branching ratios (β_rad, and β_exp) were estimated. Fluorescence transitions at ⁴F_3/2 → ⁴I_11/2. The 1.06 and 1.331μm fluorescence bands are found to have the highest σ_emi(λ) at 12.02×10^-19 and 20.44×10^-19cm², respectively. The effective band width, gain bandwidth, and optical gain suggest that 0.5 mol% of Nd₂O₃ doped glass may be a good option for creating O-band optical fiber amplifiers.

Received: 11 April 2024 | Revised: 11 July 2024 | Accepted: 24 July 2024

Conflicts of Interest

The authors declare that they have no conflicts of interest to this work.

Data Availability Statement

Data are available from the corresponding author upon reasonable request.

Author Contribution Statement

R. Rajaramakrishna: Conceptualization, Methodology, Software, Validation, Formal analysis, Investigation, Resources, Data curation, Writing – original draft, Writing – review & editing, Visualization, Project administration. Evgenia Slyusareva: Validation, Investigation, Project administration