Multi-core plastic optical fiber, optical communication cable, and optical communication system

Abstract

The present invention addresses the problem of providing a multi-core plastic optical fiber, an optical communication cable, and an optical communication system, all which have a wide transmission band.　The present invention is a multi-core plastic optical fiber having a cross-sectional form comprising two or more island portions and a sea portion surrounding the island portions. The island portions each comprise a single core and cladding that surrounds the core in a one-to-one correspondence with the core. Each cladding is independent of other cladding. The refractive index (N2) of the cladding is lower than the refractive index (N1) of the core. The refractive index (N3) of the sea portion is higher than the refractive index (N2) of the cladding.