We report here the low-loss double-end coupling of an anti-resonant hollow-core fiber (AR-HCF) with a solid-core single-mode fiber by the fiber tapering technique for the first time. The double-end coupling model is established by the beam propagation method, and the various influences, such as those of insertion depth, tapered waist offset, tapered waist bending, etc, on the coupling efficiency are simulated in detail. Results show that the coupling efficiency can be optimized by choosing proper waist diameters of the tapered solid-core fibers at both ends; meanwhile, the output taped fiber must be inserted into the proper depth. The calculated maximum coupling efficiency is 70.8% for AR-HCF of the core diameter 46 μ m at the 1.5 μ m band, and the measured value is ∼52.3%, which is hoped to be further increased by improving the performance of the tapered fibers and the coupling system. This work opens new opportunities for all-fiber structured gas lasers, which is v...

中文翻译：

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反共振空心光纤与实心单模光纤的双端低损耗锥形化技术

我们在这里首次报告了通过纤维锥度技术将反谐振空心光纤（AR-HCF）与实芯单模光纤的低损耗双端耦合。通过光束传播方法建立了双端耦合模型，并详细模拟了插入深度，锥形腰部偏移，锥形腰部弯曲等对耦合效率的影响。结果表明，可以通过选择两端的锥形实心纤维的适当腰部直径来优化耦合效率。同时，必须将输出的绑扎光纤插入适当的深度。对于1.5μm波段的磁芯直径为46μm的AR-HCF，计算出的最大耦合效率为70.8％，测量值为〜52.3％，希望通过改善锥形光纤和耦合系统的性能来进一步提高它。这项工作为全光纤结构的气体激光器开辟了新的机遇，这是...