Yb^(3+)-doped new gallium-fluorophosphate glasses are prepared,and the influence of Ga_2O_3 on the physical properties,spectroscopic and lasing properties of Yb^(3+)-doped fluorophosphate glasses was studied. The results show that the spectroscopic and lasing properties as well as crystallization stability of Yb^(3+)-doped gallium-fluorophosphate glasses increase with the increasing amount of Ga_2O_3,fluorescence lifetime,emission cross-section and gain coefficient of Yb^(3+)-doped gallium-fluorophosphate glasses reach the maximum values at Ga_2O_3%=8 mol%.The results indicate that Yb^(3+)-doped gallium-fluorophosphate glasses can be as good candidate for ultra-short pulse lasers.
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