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Ultrahigh-speed photographs of fiber-fuse propagation in single-mode silica fibers revealed a new factor, other than pumping laser power that affects the morphology of damage sites: the length of the running optical discharge. Nine W pumping of 1480 nm light generated a discharge of ~130 um in half-width moving rapidly and leaving discrete voids along the fiber core, whereas 2-W-pumped discharge was ~27 um long, moved slowly and left nearly continuous thin voids. This is because 9-W-pumped discharge takes a longer time to travel its half-width, about 5/3 times longer than that of the 2-W-pumped discharge, which provides longer interaction time for modifying the fiber core.

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Date published: 2005-06-01

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Manuscript type: Author's version (Submitted manuscript)

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First published URL: https://doi.org/10.1143/JJAP.44.4022

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Updated at: 2024-01-05 22:12:02 +0900

Published on MDR: 2021-08-14 03:56:12 +0900