Multi-core optical fiber and method of optical transmission
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United States of America Patent
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Sep 1, 2015
Grant Date -
Nov 14, 2013
app pub date -
Jul 11, 2013
filing date -
Sep 7, 2011
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Abstract
A multi-core optical fiber has: a plurality of core portions; a cladding portion that is positioned around each of the plurality of core portions and has a refractive index lower than that of each of the plurality of core portions; and a separation distance between adjacent ones of the plurality of core portions being set so that crosstalk of light between the adjacent core portions over an entire length thereof becomes −15 dB or greater at a wavelength of 1550 nm and a cable cut-off wavelength becomes 1530 nm or less.
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