Abstract

We report on inhibited-coupling hollow-core optical fibers exhibiting specific modal operation and low loss in the short-wavelength range. We show that judicious choice of the fiber cladding structure allows obtaining fibers that favor the propagation of higher-order modes and fibers which combine effective single-mode operation and low loss. Moreover, we report on recent improvements in hollow-core fibers with ultralow loss in the visible and ultraviolet range.

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