2-3 μm mid-infrared luminescence of Ho3(+)/Yb(3+) co-doped chloride-modified fluorotellurite glass
Résumé
In this paper, Ho(3+)/Yb(3+) co-doped chloride-modified fluorotellurite glasses with 2-3 μm mid-infrared luminescence are prepared. By measuring and investigating the transmission spectra and emission spectra, the prepared glasses show a high transmittance (91 %) and low maximum phonon energy (813 cm(-1)). Based on the measured absorption spectra, the Judd-Ofelt parameters and radiation characteristics were calculated in depth. In addition, with the assistance of phonons, the energy transfer between Ho(3+)/Yb(3+) ions further increases the mid-infrared fluorescence intensity. The calculated emission cross-section at 2.0 μm and 2.85 μm reach 16.47 × 10(-21) cm(2) and 7.8 × 10(-21) cm(2), respectively. It is worth mentioning that the quantum efficiencies of Ho(3+): (5)I(7)→(5)I(8) and (5)I(6)→(5)I(7) reach 51.47 % and 84.14 % respectively. The results having also in mind good thermal stability (ΔT = 102℃) and refractive index (n = 1.645) indicate that this glass has a promising application for the study of fiber lasers in the mid-infrared band.
Fichier principal
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy.pdf (2 Mo)
Télécharger le fichier
Origine | Fichiers produits par l'(les) auteur(s) |
---|