Investigation of Y2.1Er0.9(ScxGa1-x)(5)O-12 Matrix Components on the Spectral Properties around 3.0 mu m by Micro-Pulling-Down Method

Single crystal fibers of 30% Er3+-doped compound of Y-3(ScxGa1-x)(5)O-12 have been grown by using the micro-pulling down (mu-PD) technique successfully. Our main purpose is to tune the fluorescence properties by adjusting the ratios of Sc3+ and Ga3+ ions inside the matrix crystals. The crystal structures of the series compounds were measured and analyzed through X-ray diffraction (XRD) measurements. The components and doping elements distributions were measured by the X-ray Fluorescence spectrometry and electron-probe microanalyzer. The absorption and mid-infrared fluorescence spectra, including the fluorescent lifetime of Er3+:I-4(13/2) and I-4(11/2) levels were measured and compared systematically at room temperature. Spectral analysis indicated that the fluorescent lifetime of Er3+:I-4(13/2) tended to shorten and the emission spectra began to show a red shift when the proportion of YSG increased in the compound. Furthermore, the Raman spectra were measured to reveal the variations of lattice vibration and phonon energy.