The effect of OH− on IR emission of Nd3+, Yb3+ and Er3+ doped tetraphosphate glasses Original Research Article

Tetraphosphate glasses doped with different concentration Ln3+ (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 kOH–Ln, which represents the strength of interaction between Ln3+ ions and OH− groups in the case of energy migration, were calculated for Nd3+, Yb3+ and Er3+ doped tetraphosphate glasses.