The performance of optical fiber communication, laser, and sensing systems is ultimately limited by the attenuation of optical fiber, which cannot be lower than the barrier set by Rayleigh scattering in bulk silica glass. In this work, the longstanding Rayleigh scattering limit is conquered by using a hollow‐core fiber (HCF). Two visible‐guiding hollow‐core conjoined‐tube anti‐resonant fibers are successfully fabricated and exhibit overall losses of 3.8 dB km⁻¹ at 680 nm and 4.9 dB km⁻¹ at 558 nm, respectively. The latter surpasses the Rayleigh scattering limit of silica glass fiber by 2 dB km⁻¹ at the corresponding wavelength. Numerical simulations indicate that the loss level the authors achieve is still much higher than the ultimate loss limit caused by surface scattering of this HCF geometry, leaving plenty of room for further refinement.

中文翻译：

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用空心纤芯方法克服可见光波长下石英玻璃纤维的瑞利散射极限

光纤通信，激光和传感系统的性能最终受到光纤衰减的限制，光纤衰减不能低于散装石英玻璃中瑞利散射设定的势垒。在这项工作中，使用空心光纤（HCF）克服了长期的瑞利散射极限。成功制造了两根可见导引的空心纤芯连管反谐振光纤，它们在680 nm处的总损耗分别为3.8 dB km ^-1和在558 nm处的总损耗为4.9 dB km ^-1。后者比石英玻璃纤维的瑞利散射极限高出2 dB km ^-1在相应的波长。数值模拟表明，作者达到的损耗水平仍远高于由这种HCF几何形状的表面散射引起的最终损耗极限，为进一步改进留有足够的空间。