Optical transmission link, optical transmission system and optical transmission method
AssigneeNTT, Inc.
InventorsKoki SHIBAHARA, Megumi HOSHI, Yutaka MIYAMOTO
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Abstract
The optical transmission link has a configuration in which a plurality of multicore fibers having the same characteristics and the same length are connected. When N is an integer of 2 or more, each multicore fiber has N pieces of cores arranged at equal intervals in an annular shape in a cross section thereof. When p is an integer of 0 or more to N−1 or less and an angular rotation of the multicore fiber with respect to a predetermined reference is (2π/N)×p, N pieces of the multicore fibers are connected by (N−1) pieces of connection points at a rotation angle at which p is not used repeatedly between N pieces of the multicore fibers.
Claims6
An optical transmission link comprising a plurality of multicore fibers connected to each other, each of the multicore fibers having same characteristics and a same length, wherein,
- when N is an integer of 2 or more, each of the multicore fibers has N pieces of cores arranged at equal intervals in an annular shape in its cross section,
- when p is an integer of 0 or more to N−1 or less and an angular rotation of each of the multicore fibers with respect to a predetermined reference is (2π/N)×p, N pieces of the multicore fibers are connected by (N−1) pieces of connection points at a rotation angle at which p is not used repeatedly between N pieces of the multicore fibers.
An optical transmission system comprising:
- a plurality of optical transmitters that transmits an optical signal;
- a spatial multiplexing multiplexer that multiplexes a plurality of the optical signals into a spatial multiplexing signal, the plurality of the optical signals having been respectively transmitted from the plurality of optical transmitters;
- the optical transmission link that transmits the spatial multiplexing signal;
- a spatial multiplexing demultiplexer unit that divides the spatial multiplexing signal into a plurality of optical signals;
- a plurality of optical receivers that converts each of the plurality of the optical signals into a plurality of analog electrical signals, respectively, the plurality of the optical signals having been obtained after dividing by the spatial demultiplexing demultiplexer;
- and
- a signal processor that compensates for crosstalk of each of the plurality of the analog electrical signals by using another analog electrical signal included in the plurality of the analog electrical signals, wherein
- the optical transmission link is provided by connecting a plurality of multicore fibers having same characteristics and a same length,
- when N is an integer of 2 or more, each of the multicore fibers has N pieces of cores arranged at equal intervals in an annular shape in its cross section, and
- when p is an integer of 0 or more to N−1 or less and an angular rotation of each of the multicore fibers with respect to a predetermined reference is (2π/N)×p, N pieces of the multicore fibers are connected by (N−1) pieces of connection points at a rotation angle at which p is not used repeatedly between N pieces of the multicore fibers.
An optical transmission method comprising
- transmitting, by an optical transmission link provided by connecting a plurality of multicore fibers having same characteristics and a same length, a plurality of optical signals which has been spatial multiplexed, wherein,
- when N is an integer of 2 or more, each of the multicore fibers has N pieces of cores arranged at equal intervals in an annular shape in its cross section, and
- when p is an integer of 0 or more to N−1 or less and an angular rotation of each of the multicore fibers with respect to a predetermined reference is (2π/N)×p, N pieces of the multicore fibers are connected by (N−1) pieces of connection points at a rotation angle at which p is not used repeatedly between N pieces of the multicore fibers.
Dependencies are inferred from the claim text.