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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Tm3+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.
The core-doped Tm3 + optical fiber preform with fiber core and high Ge-doped fibers was developed by “wet method” doping method on MCVD lathe and the optical fiber preform with hexagonal cross-section was made by side grinding and polishing process. After the inner layer is coated with low refractive index material, a cladding pumping optical fiber is made, the absorption spectrum is tested, and the optical fiber parameters are optimized.A linear optical resonant cavity is prepared by writing the fiber Bragg grating at both ends of the optical fiber, With a laser pumping at a working wavelength of 793 nm, a laser output with a working wavelength of 1947.1031 nm and a power of 2.05 W was obtained, thereby demonstrating that this optical fiber has excellent optical characteristics.