Multicore fiber
View Patent ↗A multicore fiber includes cores located at vertexes of a polygonal ring and a cladding including sub medium regions and covering the cores. A refractive index of the cladding is lower than a refractive index of the cores and higher than a refractive index of the sub medium regions. The sub medium regions are arranged at positions to reduce a crosstalk between adjacent cores of the cores.
1. A multicore fiber comprising:
cores located at vertexes of a polygonal ring; and
a cladding including sub medium regions and covering the cores, a refractive index of the cladding being lower than a refractive index of the cores and higher than a refractive index of the sub medium regions;
wherein the sub medium regions are arranged at positions to reduce a crosstalk between adjacent cores of the cores,
wherein a shape of each of the sub medium regions is an ellipse that crosses a first line segment linking the adjacent cores, and
wherein a longitudinal direction of the ellipse crosses a direction of the first line segment.
2. The multicore fiber according to claim 1 ,
wherein no core is included inside the polygonal ring.
3. The multicore fiber according to claim 1 ,
wherein the cores comprise first cores having a first optical characteristic and second cores having a second optical characteristic which is different from the first optical characteristic,
wherein the first cores and the second cores are located on the vertexes of the polygonal ring alternately.