Lu Yao, Chen Zilun, Liu Wenguang, Jiang Man, Yang Junbo, Zhou Qiong, Zhang Jiangbin, Chai Junyu, Jiang Zongfu
Opt Express. 2022 Jun 20;30(13):22435-22441. doi: 10.1364/OE.458997.
We report on the generation of single transverse mode output in large-mode-area fiber with a core diameter of 50 µm using a 3×1 photonic-lantern-based adaptive spatial mode control system. We have designed and fabricated the photonic lantern composed of a single mode fibers bundle taper region and a multi-segment multimode fiber splicing region. From simulation and experiments, we demonstrate that the quality of the output beam is significantly influenced by the size of the fibers bundle's waist and the segmented splicing scheme of the multimode fiber. Stable single transverse mode output is achieved at 1064 nm with M ∼1.4, which will provide a possible technical solution to increase the mode instability threshold in high power large-mode-area fiber systems.
我们报道了使用基于3×1光子灯笼的自适应空间模式控制系统，在芯径为50μm的大模场面积光纤中产生单横向模式输出的情况。我们设计并制作了由单模光纤束锥区和多段多模光纤拼接区组成的光子灯笼。通过模拟和实验，我们证明了输出光束的质量受到光纤束腰尺寸和多模光纤的分段拼接方案的显著影响。在1064nm波长处实现了稳定的单横向模式输出，M约为1.4，这将为提高高功率大模场面积光纤系统中的模式不稳定性阈值提供一种可能的技术解决方案。
