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采用掺杂粉末直拉棒工艺制备了一种小芯径的掺镱光子晶体光纤。以此光纤为增益介质,抽运波长为976 nm,实现了波长为1045 nm激光连续输出。并研究了抽运功率与光纤长度对激光性能的影响。受限于光纤的小芯径尺寸,该光纤激光器系统激光输出功率最大仅为0.42 W,激光斜率效率仅为33%。实验结果表明,利用掺杂石英粉末直拉棒工艺制备的掺镱光子晶体光纤有望应用于高功率光纤激光器的研制。
A small-diameter, ytterbium-doped photonic crystal fiber was prepared by doping powder rod. Taking this fiber as the gain medium, the pump wavelength is 976 nm, realizing the continuous output of 1045 nm laser wavelength. The effects of pumping power and fiber length on laser performance were also studied. Subject to the small core diameter of the fiber, the laser output power of this fiber laser system is only 0.42 W maximum and the laser slope efficiency is only 33%. The experimental results show that the Ytterbium-doped photonic crystal fiber fabricated by doping quartz powder direct pull rod technology is expected to be used in the development of high-power fiber laser.