OPTICAL FIBER PREFORM, OPTICAL FIBER, AND METHOD OF MANUFACTURING OPTICAL FIBER
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United States of America Patent
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Oct 5, 2017
app pub date -
Jun 10, 2016
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Jul 15, 2015
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Abstract
An optical fiber preform includes: a core formed of silica glass which does not contain Ge, wherein the core has at least one of characteristics in spectrometry of (1) an absorption peak is present at a wavelength of 240 nm to 255 nm, and (2) a wavelength at which an ultraviolet transmittance is 50% or lower is longer than 170 nm.
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