中文摘要：

基于大模面积双包层Er3＋／Yb3＋共掺光纤，采用P—F腔结构，详细研究了工作温度、光纤弯曲对泵浦吸收和激光输出性能的影响。结果表明：随着泵浦功率的增大，输出光谱的模式逐渐增多；泵浦源的工作温度决定其输出光谱特性，进而影响光纤激光器的输出效果；光纤不同激光模式对应不同光纤弯曲损耗，当弯曲半径减小到一定程度时，多模输出变成单模输出，由此提高输出光束质量。

英文摘要：

Based on the large mode area double cladding Er3＋/Yb3＋ co-doped fiber and P-F cavity structure,the in- fluences of the operating temperature and fiber bending on the pumping absorption and laser output properties were studied in detail. The results show that the mode of output spectrum gradually increases with the increase of pumping power;the operating temperature of the pumping source determines the output spectrum characteristics and influences the output properties of the fiber laser; different fiber laser modes correspond to different fiber bending loss. The multi- mode output turns into the single mode output when the bending radius reduces to a certain extent,and the quality of output beam is improved.