Optical fiber preform, method for manufacturing optical fiber preform, and method for setting striae pitch of optical fiber preform
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United States of America Patent
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Jul 5, 2022
Grant Date -
Aug 6, 2020
app pub date -
Oct 3, 2018
filing date -
Oct 6, 2017
priority date (Note) -
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Abstract
An optical fiber preform including a glass material and a refractive index adjusting additive is disclosed. This preform has striae due to difference in concentration of the additive and the striae have concentric refractive index periodicity in at least a part thereof from a radial center of the preform to an outer periphery thereof. The respective striae pitches each indicating a period of the refractive index periodicity increase from the center of the preform to the outer periphery thereof.
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