Abstract
We numerically investigate the effect of scaling two key structural parameters in antiresonant hollow-core fibers—dielectric wall thickness of the cladding elements and core size—in view of low-loss mid-infrared beam delivery. We demonstrate that there exists an additional resonance-like loss peak in the long-wavelength limit of the first transmission band in antiresonant hollow-core fibers. We also find that the confinement loss in tubular-type hollow-core fibers depends strongly on the core size, where the degree of the dependence varies with the cladding tube size. The loss scales with the core diameter to the power of approximately −5.4 for commonly used tubular-type hollow-core fiber designs.
Highlights
Antiresonant hollow core fibers (AR-HCFs) have attracted significant attention from researchers in optics community in recent years
We present comprehensive numerical study on the effect of scaling two key structural parameters of AR-HCFs—dielectric wall thickness of the cladding elements and core diameter—in view of low-loss mid-IR beam delivery
We show for the first time the appearance of resonance-like loss peak in the long-wavelength limit of the first transmission band in AR-HCF
Summary
Antiresonant hollow core fibers (AR-HCFs) have attracted significant attention from researchers in optics community in recent years. The locations of the high-loss bands in AR-HCFs are dictated by the dielectric wall thickness of cladding elements. Two most influential structural parameters that govern the light guidance in ARHCF are the dielectric wall thickness of the cladding elements and core diameter.
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