Patent ID: 9733424
Date: 2017-08-15
CPC Classifications: C03B,G02B

Claim:
1. A multicore fiber comprising: a plurality of cores; and a cladding enclosing the plurality of the cores, wherein an external form of the cladding in a cross section is formed of an arc portion that is formed in an arc shape relative to a center axis of the cladding and a non-arc portion that is not formed in an arc shape and pinched between both ends of the arc portion relative to the center axis of the cladding, and the non-arc portion is formed with a pair of projections projecting from the both ends of the arc portion on an opposite side of the center axis relative to a straight line connecting the both ends of the arc portion and one or more of recesses pinched between the pair of the projections, wherein an intermediate projection is formed between the pair of the projections, the intermediate projection projecting on an opposite side of the center axis relative to a straight line connecting tip ends of the pair of the projections.