百瓦级全光纤双包层光子晶体光纤放大器

发布时间：2018-05-07 07:57

本文选题：光纤光学 + 光纤放大器　；参考：《中国激光》2017年11期

【摘要】：利用双包层掺镱光子晶体光纤(DC-PCF)作为增益光纤,设计制作了全光纤双包层光子晶体光纤放大器。实验制作了匹配DC-PCF的(6+1)×1端面抽运耦合器,6根抽运光纤采用包层直径、纤芯直径分别为105μm和125μm(数值孔径为0.22)的多模光纤,信号光纤采用普通单模光纤。利用套管法制作端面抽运耦合器,并将制作完成的耦合器与DC-PCF直接熔接,再对光子晶体光纤进行锥棒熔接,锥棒输出端面镀1000~1100nm的增透膜,以防止激光反馈对整个放大系统产生影响。对全光纤双包层光子晶体光纤放大器进行测试,使用976nm的抽运源提供能量,信号光使用波长为1064nm、功率为2 W的连续光。当抽运功率达到最大值151.83 W时,最大输出功率为108.1 W,斜率效率为72.7%。输出光斑为很好的基模光斑,体现了光子晶体光纤在具有大模场面积的同时仍能保持基模传输的优良特性。
[Abstract]:Using double-clad ytterbium-doped photonic crystal fiber DC-PCF as gain fiber, an all-fiber double-clad photonic crystal fiber amplifier is designed and fabricated. Six pumped optical fibers with cladding diameter and core diameter of 105 渭 m and 125 渭 m (numerical aperture 0.22) were fabricated by experiments. The signal fibers were composed of ordinary single-mode fibers. The end pumped coupler is fabricated by casing method, and the finished coupler is welded directly with DC-PCF, then the photonic crystal fiber is fused with the cone rod, and the end surface of the cone rod is coated with the antireflection film of 1000~1100nm. To prevent the effect of laser feedback on the whole amplification system. The all-fiber double-cladding photonic crystal fiber amplifier is tested. The pump source of 976nm is used to provide energy. The signal wavelength is 1064 nm and the power is 2 W continuous light. When the pump power reaches the maximum value of 151.83 W, the maximum output power is 108.1 W and the slope efficiency is 72.7 W. The output spot is a good fundamental mode spot, which shows that the photonic crystal fiber can keep the fundamental mode transmission at the same time of large mode field area.
【作者单位】：国防科学技术大学光电科学与工程学院;
【基金】：国家自然科学基金(61370045)
【分类号】：TN248

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