title: Spectroscopic properties of Nd 3 + and Pr 3 + in gallate glasses with low phonon energies.
abstract: Absorption and fluorescence spectra of Nd3 +were measured in potassium tantalum gallate, lead bismuth gallate (PBG), fluorozirconate (ZBLAN), and Ge-Ga-S glasses. A Judd -Ofelt analysis was performed to determine the spontaneous emission probability and stimulated emission cross section of the4 F3/2 ?4 I11/2 transition of Nd3 +. Raman spectra were studied to clarify the maximum phonon energies of the glasses. The fluorescence of the1 G4?3 H5 transition of Pr3 + in a dehydrated PBG glass was observed for the first time to our knowledge. The PBG glass has a higher quantum efficiency than that of ZBLAN glass based on the Judd -Ofelt analysis.
authors.forename: H
authors.initials: H
authors.lastname: Takebe
authors.forename: K
authors.initials: K
authors.lastname: Yoshino
authors.forename: T
authors.initials: T
authors.lastname: Murata
authors.forename: K
authors.initials: K
authors.lastname: Morinaga
authors.forename: J
authors.initials: J
authors.lastname: Hector
authors.forename: W S
authors.initials: WS
authors.lastname: Brocklesby
authors.forename: D W
authors.initials: DW
authors.lastname: Hewak
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: D N
authors.initials: DN
authors.lastname: Payne