Patent ID: 9400351
Filing Date: 2016-07-26
CPC Classification: G02B

Claim Text:
1. A multi-core fiber comprising: an even number of cores, wherein said even number is at least ten; and a cladding surrounding the core, wherein in the even number of cores, a half of the cores are disposed in a manner that centers are located on apexes of a regular polygon whose center is at an origin point in the cladding, in the even number of cores, other cores other than the half of the cores are disposed in a manner that centers are located on perpendicular bisectors of edges of the regular polygon on an inner side of the regular polygon, wherein no core is disposed at the origin point in the cladding, and an expression below is satisfied where a number of the even number of cores is defined as n and a size of an acute angle formed of a line connecting a center of a core on which attention is focused in the half of the cores to a center of a core in the other cores adjacent to the core on which attention is focused and a line connecting the center of the core on which attention is focused to the origin point is defined as φ, wherein the n is a number other than 12 and the φ is an angle other than 30°