Photoluminescent Property Effect of Sc_(3+) on Er_(3+)/Y_(3+)/Yb_(3+) Doped Al_2O_3 Powders

The photoluminescence （PL） property effect of Sc3＋ on the Er3＋/Y3＋/Yb3＋ doped Al2O3 powders prepared by sol-gel method has been investigated. The X-ray diffraction （XRD） and transmission electron microscopy （TEM） implied that the distribution of dopants （Er3＋ , Y3＋ , Yb3＋ , Sc3＋） was improved effectively with the rise of Sc3＋ concentration. The Fourier transform infrared spectra （FTIR） results demonstrated that the ligand around the quenching center -OH and the population of -OH were altered by introducing different amounts of Sc3＋ . The PL intensity centered at 1530 nm was increasingly improved with the rise of Sc3＋ concentration, as well as the corresponding full widths at the half maximum （FWHM） and lifetime. The optimized PL intensity was 4.7 times higher than that non-Sc3＋ doped sample for the Al2O3 powders codoped with 10mol% Sc3＋ . This material can be promising candidates for optical fiber amplifier.