Abstract
Single crystal fibers of 30% Er3+-doped compound of Y3(ScxGa1−x)5O12 have been grown by using the micro-pulling down (μ-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+:4I13/2 and 4I11/2 levels were measured and compared systematically at room temperature. Spectral analysis indicated that the fluorescent lifetime of Er3+:4I13/2 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.
Highlights
The laser in the region of 2.7–3.0 μm has attracted much attention because of the wide applications of communications, medicine, remote sensing and science research [1,2,3,4]
The Yb,Ho:GdYTaO4 laser crystal [5] and Tm,Ho:LuYAG laser crystal [6] have been grown and proved that they can be used to generate the 2.911 μm laser. These examples show that the emission wavelength can be controlled by using different host materials and different doping ions together
When the Er3+ -doping concentration of the host material is higher than 30%, the mid-infrared emission gets strong usually
Summary
The laser in the region of 2.7–3.0 μm has attracted much attention because of the wide applications of communications, medicine, remote sensing and science research [1,2,3,4]. The laser shows a weak absorption of water at the wavelength of 2.911 μm. As a result, it can lose little energy when going through the atmosphere to the space. The Yb,Ho:GdYTaO4 laser crystal [5] and Tm,Ho:LuYAG laser crystal [6] have been grown and proved that they can be used to generate the 2.911 μm laser. These examples show that the emission wavelength can be controlled by using different host materials and different doping ions together.
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