Optical spectroscopy, 1.06μm emission properties of Nd-doped phosphate based glasses.

Neodymium doped phosphate based glasses with composition of (PO+KO+AlO+CaF) were prepared. The samples were analysed through differential thermal analysis (DTA), Fourier transform infrared (FTIR), absorption, emission and decay measurements. Judd-Ofelt parameters (Ω) have been determined from the spectral intensities of absorption bands in order to calculate the radiative parameters like radiative transition probabilities (A), radiative lifetime (τ) and branching ratios (β) for the F→I laser transition of Nd ion.

Structural and luminescent properties of KY(1-x)DyxBO3 phosphors.

Yttrium borate phosphors (KY(1-x)DyxBO3) doped with Dy(3+) ions were synthesized by the solid-state reaction method. The structural and morphological characteristics were studied by XRD, FTIR and SEM measurements. Luminescent properties of different concentrations of KY(1-x)DyxBO3 phosphors were investigated from the excitation, emission and decay analyses.

Luminescence properties of Eu(3)(+)-doped Na3Gd(PO4)2 red-emitting nanophosphors for LEDs.

Eu(3+)-doped Na3Gd(PO4)2 phosphors were synthesized by the modified citrate gel combustion technique. From the XRD pattern, structure of the compound was found to be orthorhombic with a particle size of 10-20nm. The emission spectra revealed that the Na3Gd(PO4)2:Eu(3+) phosphors can be excited effectively by 394nm pump wavelength.

Spectroscopic investigation and optical characterization of Eu3+ ions in K-Nb-Si glasses.

This paper reports on the effect of concentration of Eu(3+) ions in K2O-Nb2O5-SiO2-Eu2O3 (KNbSiEu) glasses prepared by the melt quenching technique. By using the Judd-Ofelt (JO) theory, the intensity parameters Ωλ (λ=2, 4, 6) have been determined from the absorption and emission spectra of Eu(3+) ions under different constraints. The radiative properties of some of the excited states of Eu(3+) ions have been calculated.

Optical and luminescent properties of Sm³+ doped tellurite glasses.

Glasses with chemical composition of (62-x) TeO(2)+25 ZnO+8 K(2)O+5 CaO+x Sm(2)O(3) (TZKCSmx; x=0.1, 0.5, 1.