Patent ID: 9164228
Filing Date: 2015-10-20
Classification: G02B

Abstract:
1. A multi-core optical fiber comprising a plurality of core parts each extending along a predetermined axis, a cladding integrally covering each of the plurality of core parts, and a coating provided on an outer peripheral surface of the cladding, the multi-core optical fiber satisfying at least one of first to third conditions wherein A the first condition is defined in that: each of the core parts enables single-mode transmission at a predetermined wavelength, and wherein α wherein the second condition is defined in that: each of the core parts enables single-mode transmission at a predetermined wavelength, and wherein α and wherein the third condition is defined in that: a transmission loss of a spatial mode not guided with the transmission loss of not more than 1 dB/km at a predetermined wavelength, is not less than 0.9 dB/m, and wherein α