Materials Science and Engineering

Biography

Biography: Ganesh Agawane

Abstract

Statement of the Problem: Erbium doped fiber amplifiers (EDFAs) have been studied extensively to convert the NIR radiation into the visible light. The EDFAs can be applied in numerous optical applications like; optical fiber communication, data storage, biomedical diagnostic, color display, sensor, eye-safe laser and undersea optical communication. The host glass matrix noticeably affects the emission properties of the rare earth ions and, therefore, a broad study is obligatory for the exploration of the paramount apt host matrix. Fluorophosphate (FP) provides an excellent way to obtain the best matrix for doping of rare earths. The FP matrixes endure fracture toughness effortlessly making stable solid state lasers over extensive physical qualities. These matrixes are perfect for large inhomogeneous augmentation, superior broadband and flatness due to low phonon energy. Methodology & Theoretical Orientation: In this study, we report preparation of Er³⁺/Yb³⁺ co-doped fluorophosphate (FP) glasses containing aluminium-metaphosphate by melt quenching technique. The UV-Vis-NIR absorption measurements were carried out and analyzed through Judd–Ofelt model. Various spectroscopic properties like radiative lifetime, transition probability, intensity parameters Ω_λ, emission cross-sections and stimulated absorption cross-sections at 1.53 μm have been evaluated. Findings: In this study, we report preparation of Er³⁺/Yb³⁺ co-doped fluorophosphate (FP) glasses containing aluminium-metaphosphate by melt quenching technique. The UV-Vis-NIR absorption measurements were carried out and analyzed through Judd–Ofelt model. Various spectroscopic properties like radiative lifetime, transition probability, intensity parameters Ω_λ, emission cross-sections and stimulated absorption cross-sections at 1.53 μm have been evaluated. The fluorescence lifetime was measured and calculated by non-exponential least square fit technique. The lifetime of the glasses first increased and then decreased with increased Yb³⁺ mol%. Conclusion & Significance: Near infrared absorption and absorption cross-section were increased with an increase in YbF₃ content. Emission elucidations showed that the glass matrix and concentration of Er³⁺ and Yb³⁺ ions significantly impact the emission characteristics and radiative lifetimes. The longest lifetime of 12 ms proved the better host matrix and 2 mol% YbF₃ is the best condition for Er co-doped glasses.