The effect of OH- on IR emission of Nd3+, Yb3+ and Er3+ doped tetraphosphate glasses

Tetraphosphate glasses doped with different concentration Ln(3+) (Ln = Nd, Yb and Er) were prepared. The IR transmission spectra and fluorescence lifetimes were measured. The relationships between IR-fluorescence decay rate and OH group content were investigated and analyzed. The constant k(OH-Ln), which represents the strength of interaction between Ln(3+) ions and OH groups in the case of energy migration, were calculated. for Nd3+ Yb3+ and Er3+ doped tetraphosphate glasses. (C) 2002 Elsevier Science Ltd. All rights reserved.