Near-infrared photoluminescence studies of neodymium ions doped SrO-Al2O3-BaCl2-B2O3-TeO2 glasses for laser and fiber amplifier applications. (December 2022)

• Record Type: Journal Article
• Authors: Sailaja, P.; Mahamuda, Sk.; Swapna, K.; Venkateswarlu, M.; Rao, A.S.
• Is Part Of: Optics & laser technology. Volume 156(2022)
• Publication Date: 2022-12
• Subjects: Neodymium ion -- Boro-tellurite glasses -- NIR -- Laser -- Fiber amplifier; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2022.108569
• Languages: English
• ISSNs: 0030-3992

Abstract

Graphical abstract: Highlights: OCBTNd glasses have been prepared by melt quenching method. JO parameters evaluated follow the same trend Ω6 ˃Ω2 ˃Ω4 for all glasses. OCBTNd1.0 glass shows highest magnitude of stimulated cross-section. OCBTNd1.0 glass possesses high quantum efficiency. OCBTNd1.0 glass can be suggested for Near-IR (1.064 μm) laser applications. Abstract: This paper reports, preparation and characterization of Neodymium (Nd 3+ ) ions doped Oxy Chloro Boro Tellurite (OCBT) glasses. The influence of Nd 3+ ions concentration on physical, absorption, emission, and decay properties of OCBT glasses were studied in detailed using spectroscopic techniques. The experimental oscillator strengths measured from the absorption spectral data were subjected for Judd-Oflet (JO) analysis to estimate the best fit JO parametes and the dependent radiative properties of the as prepared glasses. The photoluminescence (PL) spectra recorded under 824 nm laser diode excitation reveal three emission peaks positioned at 887, 1064 and 1340 nm pertaining to 4 F3/2 → 4 I9/2, 4 F3/2 → 4 I11/2 and 4 F3/2 → 4 I13/2 transitions respectively. Correlation of radiative parameters information with PL spectral data allows to estimate various lasing parameters like emission cross section ( σ sec ), gain bandwidth ( σ sec × Δ λ P ) and optical gain ( σ sec × τ R ). The PL decay spectra recorded for the as prepared glasses for 4 F3/2 → 4 I11/2 intense emission transition (observed at 1064 nm) reveal single exponential nature. The experimental lifetimes (τexp ) measured from the PL decay profiles are correlated with the radiative lifetimes (τR ) measured from the JO analysis to estimate quantum efficiency (η%) of the titled glasses. Among all the as prepared OCBTNd samples, 1 mol% of Nd 3+ ions doped OCBTglass sample flourishes highest quantum efficiency. From the productive results obtained, it can be suggested that OCBTNd1.0 glass grabs plenty of applications in solid state lasers technology, fabrication of optical fiber amplifiers and NIR laser applications.