Optical characterizations and Judd-Ofelt analysis of Dy3+ doped borosilicate glasses

• Published in: Optical materials Vol. 72; pp. 169 - 176
• Main Authors: El-Maaref, A.A., Shaaban, K.H.S., Abdelawwad, M., Saddeek, Yasser B.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2017
• Subjects: Angular momentum; Borosilicate glass; Judd-Ofelt method; Radiative rates; Rare earth ions; Radiative rates; Judd-Ofelt method; Rare earth ions; Borosilicate glass; Angular momentum
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2017.05.062

Preparation of various concentrations of Dy3+ doped borosilicate glasses using melt quenching technique and their optical characterizations are presented. Based on the measured optical spectra, Judd-Ofelt approach is used to determine the optical parameters such as oscillator strengths, optical intensity parameters and transition lifetime. The impact of the total angular momentum on the transition lifetime is theoretically investigated. The lifetime decreases as the angular momentum increases until J=7/2, for the atomic terms FJ6, then its value increases at higher values of angular momentum. The same behavior occurs for the HJ6 states, but longer lifetime starts at J=11/2 to J=13/2. The free ion collision strengths and cross sections are evaluated to asses an interpretation of the presented radiative results. The cross sections show a decrease trend with the J-increasing while the collision strengths show the opposite behavior. Calculated data of electric dipole transition probabilities and branching ratio of several transitions of Dy3+ are reported. [Display omitted] •Borosilicate glasses containing Dy2O3 and MoO3 were prepared by melt quenching technique.•The optical parameters, oscillator strengths, and radiative lifetimes have been evaluated using Judd-Ofelt theory.•A systematic variation of lifetimes vs total angular momentum has been found.