A hollow anti-resonant fiber with nested and double cladding structure is proposed. By optimizing the structural parameters, the confinement loss reaches 4 × 10 − 4 dB / km at 1.55 μm, and the ratio of high-order mode loss to fundamental mode loss also reaches 20,000. In the O + E + S + C + L + U band, the loss is <0.01 dB / km and the ratio of high-order mode loss to fundamental mode loss is >103, indicating that the designed fiber has excellent single-mode characteristics and wide bandwidth. In addition, the manufacturing tolerance of the fiber is also discussed. It is found that the loss can still be maintained below 0.01 dB / km within the tolerance range of 8%. Therefore, we believe that the fiber has potential applications in near-infrared communication and data transmission.

中文翻译：

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覆盖O+E+S+C+L+U频段的低约束损耗单模空芯抗谐振光纤

提出了一种具有嵌套和双包层结构的空心反谐振光纤。通过优化结构参数，1.55μm处的限制损耗达到4×10−4dB/km，高阶模损耗与基模损耗之比也达到20000。在O+E+S+C+L+U频段，损耗<0.01dB/km，高阶模损耗与基模损耗之比>103，表明所设计的光纤具有优异的单模性能特性和宽带宽。此外，还讨论了光纤的制造公差。发现在8%的容差范围内，损耗仍可保持在0.01dB/km以下。因此，我们相信该光纤在近红外通信和数据传输方面具有潜在的应用前景。