title: On the origin of bichromatic laser emission in Nd3+-doped fluoride glasses.
abstract: In this work we present a detailed study about the influence of the host matrix in the spectroscopic and laser properties of Nd3+ in three different fluoride glasses. Site-selective time-resolved techniques have been used to investigate the crystal field changes felt by the Nd3+ ion as a consequence of glass inhomogeneity. Stimulated emission experiments performed under selective wavelength laser pumping show the existence of bichromatic emission from two distinguishable site distributions for Nd3+ in fluoride glasses. This result can be explained by the moderate inter-site energy transfer among Nd3+ ions found in these systems.
authors.affiliation: Departamento de Fisica Aplicada I, Escuela Superior de Ingenieros, Alda. Urquijo s/n 48013 Bilbao, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Azkargorta
authors.forename: I
authors.initials: I
authors.lastname: Iparraguirre
authors.forename: R
authors.initials: R
authors.lastname: Balda
authors.forename: J
authors.initials: J
authors.lastname: Fernández
mesh_terms: D003198:Computer Simulation; D005459:Fluorides / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007834:Lasers; D008956:Models, Chemical; D009354:Neodymium / Q000737:chemistry*
chemical_list: D009354:Neodymium; D005459:Fluorides