Abstract

While the cladding design of inhibited-coupling hollow-core photonic crystal fibers (IC-HCPCF) sets their transmission performance in the infrared wavelength range (λ>1μm), the limiting factor in their transmission loss at shorter wavelengths is set by surface scattering loss (SSL) [1]. As the SSL depends on the HCPCFs’ core surface roughness (SR) arising from thermally-induced surface capillary waves (SCW) occurring during fiber drawing, the characterization of its core surfaces, achieved by either atomic force microscopy (AFM) [2] or optical profilometry [3], becomes of paramount importance.

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