Low loss optical fiber and method of making the same
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United States of America Patent
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May 23, 2017
Grant Date -
Apr 21, 2016
app pub date -
Aug 13, 2015
filing date -
Oct 21, 2014
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Abstract
The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber).
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