Judd-Ofelt analysis and luminescence studies of Er3+ doped halogeno-antimonate glasses

Judd–Ofelt Analysis and Spectroscopy Study of Tellurite Glasses Doped with Rare-Earth (Nd3+, Sm3+, Dy3+, and Er3+)

“…The diverse physical parameters, including density (ρ g , g/cm 3 ), the molecular weights (M wt , g/mol), molar volume (V mol , cm 3 /mol), oxygen volume (V OXG , cm 3 /mol), oxygen packing density (OPD, g atom/l), indirect optical band gap (E ind opt , eV), refractive index (n), molar refractivity (R mol , cm 3 /mol), molar polarizability (α mol , (A • ) 3 ), refraction loss (R Loss ), dielectric constant (ε), polaron radius (r pl , A • ), inter ionic distance (r in , A • ), RE ion concentration (N × 10 20 , ions/cm 3 ), and field strength (F s × 10 14 , cm −2 ), were calculated using the expressions provided in the literature [14], and the estimated values are shown in Table 3. Equation ( 1) was used to calculate the density value (ρ g ) [15].…”

“…Oscillator strength was defined as the intensity of the absorption spectral lines. Furthermore, Equation ( 16) [8,14] was utilized to calculate the experimental oscillator strength ( f exp ) for each absorption band.…”

“…The values of the doubly reduced matrix elements of order Ω λ (λ = 2, 4, 6) between the manifold states of | aj | 2 and | aJ | 2 were obtained from [14,19]. The J-O intensity parameters were calculated using the least squares fitting method.…”

“…Consistent with previous research by authors such R. Van Deun et al [18], the findings show that the strongest transitions occur in the near-infrared (NIR) spectrum between 950 nm and 1600 nm. Starting with the ground state 4 I 15/2 to the excited states 4 I 13/2 , 4 I 11/2 , 4 I 9/2 , 4 F 9/2 , 4 S 3/2 , 2 H 11/2 , and 4 F 7/2 , the absorption transitions of Er 3+ ions in tellurite glass connect with absorption bands centered about 1529, 974, 796, 652, 544, 522, and 486 nm [14,25], which are presented in Figure 8. Table 7 shows there is no overlap between the spectra and J-O parametrization.…”

Spectroscopic and Judd-Ofelt Analysis of Nd3+ Ion Doped Lithium Antimony-Borate Glasses for Visible and Near Infrared Laser Application Compared to Standard Emission at 1.06 μm

“…23 Previous work discussed on neodymium luminescence and has been focused on near-infrared emission of type 4 F 3/2 → 4 I J (J = 9/2; 11/2; 13/2; via near-infrared excitation 4 I 9/2 → 4 F 5/2 + 2 H 9/2 . 2,[24][25][26][27] In our case, we have presented another alternative to the study of the luminescence of Nd 3+ incorporated in the lithium antimonyborate matrix; where we successfully detected four different green, red (low intensity), and two near-infrared emissions. These are luminescent transitions of type 2 G 7/2 + 4 G 5/2 → 4 I J (J = 9/2; 11/2; 13/2; 15/2) induced by an excitation in the visible according to 4…”