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The optical performance characteristics of anti‐resonant hollow‐core fibers (known as AR‐HCFs or ARFs) are improving rapidly, but the polarization maintaining issue with these fibers remains unresolved. Although a regular nonbirefringent ARF can maintain high polarization purity under static conditions, it cannot resist mechanical disturbances. In this work, by designing a bi‐thickness semi‐tube ARF...
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...
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