Glass samples of composition (in mol%) 20PbO-20TeO 2 -(60 -x)B 2 O 3 -xNd 2 O 3 (x = 0, 1, 2, 3, 4) were prepared by melt quenching. The glassy nature of as-quenched samples was established via differential scanning calorimetry. The amorphous nature of the glasses was confirmed via powder X-ray diffraction measurements. Judd-Ofelt (JO) analysis based on UV-visible absorption spectra was performed to determine JO parameters ⍀ ( = 2, 4, 6). The observed trend is ⍀ 2 > ⍀ 6 > ⍀ 4 . The large value of ⍀ 2 indicates the presence of covalent bonding between the Nd 3+ ions and the surrounding ligands. Radiative properties, such as radiative transition probabilities, branching ratios, and radiative lifetimes are estimated. The glass samples have relatively high branching ratio, and their emission (A em ) to excited state absorption (A ESA ) intensity ratio is higher than one for the 4 F 3/2 ¡ 4 I 11/2 transition, indicating that the prepared glasses may have potential laser applications.Résumé : Nous avons préparé par trempe de l'état liquide des échantillons de verre (en mol%) 20PbO-20TeO 2 -(60 -x)B 2 O 3 -xNd 2 O 3 (x = 0, 1, 2, 3, 4). Des mesures DSC confirment le caractère vitreux des échantillons bruts de trempe. La nature amorphe des verres est confirmée par des mesures XRD sur poudre. Nous avons complété une analyse de Judd-Ofelt (JO) sur le spectre d'absorption UV-visible, afin de déterminer les paramètres ⍀ ( = 2, 4, 6). La tendance observée indique que ⍀ 2 > ⍀ 6 > ⍀ 4 . Une valeur élevée de ⍀ 2 signifie un lien covalent entre l'ion Nd 3+ et les ligands environnants. Nous avons évalué les propriétés radiatives comme les probabilités de transition radiative, les rapports de branchement et les temps de vie radiatifs. Les échantillons de verre ont des rapports de branchement relativement élevés et leur rapport d'émission (A em ) sur l'intensité d'absorption dans l'état excité est plus grand qu'un pour la transition 4 F 3/2 ¡ 4 I 11/2 . Par conséquent, les verres que nous avons préparés constituent des candidats potentiels pour des applications laser. [Traduit par la Rédaction]
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