Nd3+ doped multicomponent metal (Gd, Y, Al, Ga)-oxides borate glass for laser and optical amplifier material

초록

In this work, new glass materials with 10Gd₂O₃–10Y₂O₃–15Al₂O₃–15Ga₂O₃–(50-x)B₂O₃–xNd₂O₃ composition were fabricated by melt-quenching technique to study their potential for photonic applications. Influence of Nd₂O₃ concentration on glass's physical, optical, and luminescence properties were evaluated. The density of glass increases (3.88 – 4.21 g/cm3) while refractive index decreases (1.6526 – 1.6513) via adding Nd₂O₃ dopant. XANES confirmed the +3-oxidation state of Nd ion in glass. EXAFS estimated the possible structural models of the 1st-shell Nd site such as cubic and hexagonal with average Nd–O distance ∼2.4 Å. Glasses absorb the photons at several wavelengths from ultraviolet to near infrared region, due to the 4f-4f transitions of Nd3+ ion. Such absorbance increases with Nd₂O₃ addition, especially at 583 nm attributed to Nd3+ hypersensitive transition and at 808 nm, a commercial Nd3+ excitation wavelength. Under excitation by 808 nm, 1 mol%-Nd₂O₃ doped glass generated the strongest NIR emission at 1064 nm with decay time ∼74 μs. The highest emission intensity of this glass is a result of concentration quenching effect. Narrow P-E hysteresis loop reveals a weak paraelectricity of glass with the linear relation between maximum polarization and applied filed. Wide gain bandwidth determined by Judd-Oflet analysis indicates that this glass is a promising amplifier for solid-state laser device and optical transmission system. © 2025 Elsevier Ltd

키워드