Multicore optical fiber with reduced inter-core crosstalk
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United States of America Patent
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Aug 19, 2014
Grant Date -
May 30, 2013
app pub date -
Nov 30, 2011
filing date -
Nov 30, 2011
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Abstract
Various apparatus and methods for reducing inter-core crosstalk in a multicore optical fiber are disclosed. A multicore optical fiber may include a plurality of cores capable of transmitting optical signals, and a cladding surrounding the cores, the cladding having a heterogeneous refractive index such that the optical signals propagate at different velocities in different ones of the cores. A multicore optical fiber may include a first length including cores having heterogeneous modal velocities and a second length, adjacent to the first length, including cores having heterogeneous modal velocities, and the cores in the first length are aligned with cores in the second length having a different modal velocity. Inter-core cross talk in a multicore optical fiber may also be reduced by transmitting optical signals through cores of a multicore optical fiber and pumping light into the cores to create unequal modal velocities in the cores.
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