Large-mode-area anti-resonant fibers (LMA ARF) with high beam quality have the potential to revolutionize mid-infrared high-power laser delivery by mitigating mode instabilities and nonlinear degradation. However, their tens-of-microns mode field diameters and small numerical aperture significantly increase the mode field mismatch and coupling complexity, respectively. In this work, an LMA all-solid anti-resonant fiber-microlens with a robust operation of high beam quality in the mid-infrared region was designed and prepared. It can significantly stabilize the efficiencies of coupling and transmission at a large radial offset. Consequently, this AS-ARF demonstrates substantial potential for advancing mid-infrared laser power delivery via fiber, ensuring exceptional beam quality throughout the process.

中文翻译：

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中红外全固体反谐振硫属化物光纤，具有较大的模面积和耦合容差


具有高光束质量的大模面积反谐振光纤 （LMA ARF） 有可能通过减轻模式不稳定性和非线性退化来彻底改变中红外高功率激光传输。然而，它们的数十微米模场直径和小数值孔径分别显著增加了模场失配和耦合复杂性。本工作设计并制备了一种在中红外区域具有高光束质量鲁棒性工作的 LMA 全固态反谐振光纤微透镜。它可以在较大的径向偏移下显着稳定耦合和传输的效率。因此，这种 AS-ARF 在推进通过光纤传输中红外激光功率方面表现出了巨大潜力，可确保整个过程中的卓越光束质量。