Structural, optical and photoluminescence properties of alkaline-earth boro tellurite glasses doped with trivalent Neodymium for 1.06 μm optoelectronic devices

• Published in: Optical materials Vol. 111; p. 110615
• Main Authors: Siva Rama Krishna Reddy, K., Swapna, K., Mahamuda, Sk, Venkateswarulu, M., Rao, A.S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2021
• Subjects: Alkaline- earth boro tellurite glasses; Judd-Ofelt parameters; Laser emission; Spectroscopic properties; Laser emission; Spectroscopic properties; Judd-Ofelt parameters; Alkaline- earth boro tellurite glasses
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2020.110615

Alkaline-Earth Boro Tellurite (AEBT) glasses (AEBT) activated with trivalent neodymium (Nd3+) ions were made by employing conventional melt quenching technique to explore their structural details, optical and photoluminescence (PL) properties. Energy Dispersive X-ray spectroscopy (EDX), absorption, fluorescence and fluorescence decay were performed to identify their feasibility for photonic applications. Judd-Ofelt (J-O) studies used for the absorption spectral features reveals larger values for Ω2 and high radiative transition rates in AEBT glasses. The emission spectra of different concentrations of Nd3+ ions doped AEBT (AEBT: Nd3+) glasses show three transitions 4F3/2 → 4I9/2, 4F3/2 → 4I11/2 and 4F3/2 → 4I13/2 at the wavelengths 887 nm, 1064 nm, and 1334 nm respectively. Among the observed transitions, 4F3/2 → 4I11/2 is the intense one observed in near - infrared (NIR) and is useful for lasing action at 1064 nm. The optical absorption, fluorescence and decay spectral studies, reveals that one mol% of Nd3+ ions concentration is quite suitable in AEBT glasses (AEBTNd1.0) to generate lasing action at 1064 nm suitable for NIR photonic broadband amplification applications. •EDX studies of AEBTNd1.0 glass revealed the chemical composition of the titled glasses.•The Judd-Ofelt analysis exposed the covalent nature of the Nd–O bond and low symmetry around Nd3+ ions in the glass network.•The transition 4F3/2 → 4I11/2 at 1064 nm has the highest stimulated emission cross-section values, branching ratios values for the AEBT glass doped with 1.0 mol% of Nd3+ ions.