title: Fluorescence properties of Nd3+-doped tellurite glasses.
abstract: The compositional and concentration dependence of luminescence of the (4)F(3/2)-->(4)I(J) (J=13/2, 11/2 and 9/2) transitions in four Nd(3+)-doped tellurite based glasses has been studied. The free-ion energy levels obtained for 60TeO(2)+39ZnO(2)+1.0Nd(2)O(3) (TZN10) glass have been analysed using the free-ion Hamiltonian model and compared with similar results obtained for Nd(3+):glass systems. The absorption spectrum of TZN10 glass has been analysed using the Judd-Ofelt theory. Relatively longer decay rates have been obtained for Nd(3+)-doped phosphotellurite glasses. The emission characteristics of the (4)F(3/2)-->(4)I(11/2) transition, of the Nd(3+):TZN10 glass, are found to be comparable to those obtained for Nd(3+):phosphate laser glasses. The non-exponential shape of the emission decay curves for the (4)F(3/2)-->(4)I(11/2) transition is attributed to the presence of energy transfer processes between the Nd(3+) ions.
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati 517 502, India.
authors.forename: K Upendra
authors.initials: KU
authors.lastname: Kumar
authors.forename: V A
authors.initials: VA
authors.lastname: Prathyusha
authors.forename: P
authors.initials: P
authors.lastname: Babu
authors.forename: C K
authors.initials: CK
authors.lastname: Jayasankar
authors.forename: A S
authors.initials: AS
authors.lastname: Joshi
authors.forename: A
authors.initials: A
authors.lastname: Speghini
authors.forename: M
authors.initials: M
authors.lastname: Bettinelli
mesh_terms: D005453:Fluorescence; D005898:Glass / Q000737:chemistry*; D007477:Ions; D009354:Neodymium / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013691:Tellurium / Q000737:chemistry*
chemical_list: D007477:Ions; D009354:Neodymium; C026660:tellurous acid; D013691:Tellurium