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Catastrophic damage in hollow core optical fibers under high power laser radiation
Abstract:
The propagation of an optical discharge (OD) along hollow-core optical fibers (HCFs) is investigated experimentally. Silica-based revolver-type HCFs filled with atmospheric air were used as test samples. We observed that the average propagation velocity of an OD along the HCF (VAV) depends on the properties of the medium around the silica structure of the fiber. It is shown that the value of VAV changes by approximately a factor of three, depending on whether the optical discharge is moving along a polymer coated or uncoated fiber. The value of VAV practically does not change when the polymer is replaced by an immersion liquid (such as glycerol) or liquid gallium. By analyzing the destruction region's patterns that appear in the fiber cladding after an OD propagation, we propose the physical picture of the phenomenon.
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