Study on LD Pumped Yb3+ -doped Double-clad Fiber Lasers数值分析对线形腔LD泵浦掺镱的双包层光纤激光器进行研究，分析了单端泵浦和双端泵浦的泵浦光及激光输出功率和增益在光纤中的分布，结果表明，非均匀泵浦比较适合高功率光纤激光器。-Study on LD Pumped Yb3+-Doped Double-clad Fiber Lasers numerical analysis of the linear cavity of the LD-pump