title: [Indirect sensitized upconversion in Tm3+ and Yb3+ codoped non-crystal pentaphosphate].
abstract: We report the blue upconversion luminescence of Tm3+ and Yb3+ codoped non-crystal pentaphosphate pumped by -798nm laser diode. The samples were directly excited to 3F4 level of Tm3+ ion. Two energy transfer processes between Tm3+ and Yb3+ contribute mainly to the population of 1G4 level of Tm3+. Phonon plays an important role in the upconversion process.
authors.affiliation: Physics Department, Nankai University, 300071 Tianjin.
authors.forename: Y
authors.initials: Y
authors.lastname: Feng
authors.forename: X
authors.initials: X
authors.lastname: Chen
authors.forename: K
authors.initials: K
authors.lastname: Li
authors.forename: F
authors.initials: F
authors.lastname: Song
authors.forename: S
authors.initials: S
authors.lastname: Bi
authors.forename: M
authors.initials: M
authors.lastname: Li
authors.forename: G
authors.initials: G
authors.lastname: Zhang
authors.forename: Z
authors.initials: Z
authors.lastname: Song
authors.forename: G
authors.initials: G
authors.lastname: Meng
authors.forename: Y
authors.initials: Y
authors.lastname: Sun