Abstract
Tm3+/Al3+ co-doped silica glass with the composition of 0.08 Tm2O3–0.8 Al2O3–99.12 SiO2 (mol%) is prepared by combining the high-temperature plasma furnace sintering technology and the dried RE-doped granulates. Using the prepared Tm3+/Al3+ co-doped silica glass as the fiber core, the Tm3+/Al3+ co-doped air-cladding fiber is fabricated by the stack-and-draw technology. Optical and laser properties of Tm3+/Al3+ co-doped air-cladding fiber are studied. The experimental results show that the Tm3+/Al3+ co-doped air-cladding fiber can be used as the potential material for the high-power fiber laser operating at 2 μm.
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