Multi-core optical fiber

摘要

The present invention relates to a multi-core optical fiber that can realize suppression of crosstalk on an easy and inexpensive basis. The multi-core optical fiber is provided with a plurality of core portions extending along a central axis of the fiber, a common cladding portion integrally holding the core portions inside, a coating layer surrounding the common cladding portion, and a bend applying portion. The bend applying portion, as an example, is provided on a partial region of an outer periphery of the coating layer and applies bending stress to a glass region.

主权项

1. A multi-core optical fiber comprising:
a plurality of core portions extending along a central axis of the fiber; a common cladding portion constituted by a continuous region which is in direct contact with and surrounds outer peripheries of the respective core portions while the core portions within the common cladding portion are separated at predetermined intervals from each other, the common cladding portion being comprised of silica glass and having a refractive index lower than that of each of the core portions; a coating layer surrounding an outer periphery of the common cladding portion; and a microbend applying element provided outside an interface between the common cladding portion and the coating layer, the microbend applying element applying microbending stress to a glass region including the core portions and the common cladding portion.