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采用四氯化硅水解掺杂结合高频等离子体粉末熔融法制备了掺Yb~(3+)石英玻璃,以此玻璃作为光纤纤芯,通过堆积-拉丝法拉制了掺Yb~(3+)大模场微结构光纤。光纤的纤芯直径达到了130μm,并且研究了光纤的吸收光谱、发射光谱、损耗特性和激光特性。以此光纤为增益介质,当泵浦波长为970nm时,实现了波长为1 033nm的连续激光输出,激光输出的最大功率为3.6 W以及激光斜率效率为42.1%。测试结果表明,利用水解工艺制备的掺Yb~(3+)大模场微结构光纤有望应用于高功率光纤激光器的研制。
Yb ~ (3+) doped silica glass was prepared by hydrolysis of silicon tetrachloride combined with high frequency plasma powder melting method. Glass was used as the fiber core. Large mode field microstructured fiber. The diameter of the core of the optical fiber reached 130 μm, and the absorption spectrum, the emission spectrum, the loss characteristic and the laser characteristic of the optical fiber were studied. Using this optical fiber as the gain medium, a continuous laser with a wavelength of 1033 nm was realized at a pump wavelength of 970 nm, with a maximum laser power of 3.6 W and a laser slope efficiency of 42.1%. The test results show that the Yb ~ (3 +) large mode field microstructured fiber prepared by hydrolysis process is expected to be used in the development of high power fiber lasers.