中文摘要：

在MCVD车床上利用“湿法”掺杂方法研制出纤芯高掺Ge的石英基掺Tm^3＋光纤预制棒,采用侧面研磨和抛光工艺制成横截面为正六边形的光纤预制棒.经拉丝,内层涂覆低折射率材料后制成包层抽运光纤.测试其吸收谱,并对光纤参数进行优化.通过在光纤两端紫外写入光纤Bragg光栅,制成线形光学谐振腔,在工作波长793 nm的激光抽运下,获得工作波长1947.1031 nm、功率2.05 W的激光输出.由此证明这种光纤具有优异的光学特性.

英文摘要：

The silica based Tm^3 ＋ doped fiber preform with high Ge concentration in preform core area was manufactured by solution doping method. It was made into an optic fiber preform with cross section of a hexagon by side polishing process, and drawn in to cladding pumping Tm^3 ＋ doped fiber with inner coverage layer of lower refraction index polymer. The absorption spectrum was measured, and the technical parameters were optimized. The uniform fiber Bragg gratings with reflectivity of 90% and 40% were written in both ends of the fiber by UV light respectively, and the linear optic cavity was constructed. The laser with wavelength of 1947. 1031 nm and power of 2.05 W was emitted by pump laser excited with wavelength of 793 nm and power of 5.6 W. It shows that the fiber have excellent optical characteristics.