以973 nm半导体激光器(LD)为抽运源,高掺杂浓度Yb~(3+)光纤为增益介质,构建了一套环形腔光纤激光器,通过调整腔内由普通光纤和偏振器件构成的偏振态滤波器,得到连续调谐宽度24 nm(1030～1054 nm)、激光阈值为49 mW的激光输出。通过对部分腔体光纤施加均匀应力的方法较大地扩展了激光器的调谐范围,实现了宽达57 nm(1021～1078 nm)的可调谐激光输出。与文献报道的基于偏振滤波原理的其他可调谐Yb~(3+)光纤激光器相比,构建的激光器实现了更大范围的可调谐性。 A ring cavity fiber laser was constructed by using a 973 nm laser diode (LD) as a pump source and a high doping Yb ~ (3+) fiber as a gain medium. By adjusting the polarization of the common fiber and the polarizer in the cavity, State filter to obtain a laser output with a continuous tuning width of 24 nm (1030 nm to 1054 nm) and a laser threshold of 49 mW. By applying uniform stress to some of the cavity fibers, the tuning range of the laser is greatly expanded, and tunable laser output is widened to 57 nm (1021 ~ 1078 nm). Compared with other tunable Yb ~ (3+) fiber lasers based on the principle of polarization filtering reported in the literature, the constructed laser achieves a wider range of tunability.