综合分析了不同基质掺Yb3+光纤的材料特性，在改进的极限输出功率理论模型的基础上，对Yb3+掺杂的硅光纤、磷酸盐光纤、YAG晶体(或陶瓷)光纤以及蓝宝石光纤的单频极限输出功率特性进行了详细分析。计算结果表明，YAG晶体(或陶瓷)光纤和蓝宝石光纤单频极限输出功率可以达到10 kW以上。分析了单模情况下的极限输出功率，结果表明YAG晶体(或陶瓷)光纤和蓝宝石光纤在单模情况下也有较大优势，目前的单频激光功率还有很大的提升空间。对于单频激光光纤材料而言，降低受激布里渊散射(SBS)增益系数、提高导热性能是提高极限输出功率的有效途径。

The characters of different Yb3+-doped fiber materials are integratedly studied and the single-frequency power limits of Yb3+-doped silica fiber, phosphate fiber, YAG crystal (or ceramic) fiber and sapphire fiber are carefully analyzed. The numerical result shows that the extractable power of YAG crystal (or ceramic) fiber and sapphire fiber can be more than 10 kW. The further study of the power limit shows that YAG crystal (or ceramic) fiber and sapphire fiber also have an advantage in single-mode working condition, indicating that these two kinds of fibers still have potentials to power scaling. For the fiber material of single-frequency fiber laser, the effective ways to boost the power limit are to reduce the stimulated Brillouin scattering (SBS) gain coefficient and improve the performance of heat conducting.