Patent ID: 9031371
Filing Date: 2015-05-12
Classification: G02B

Abstract:
1. A multi-mode optical fiber, comprising: a core extending along an optical axis direction and doped with GeO a cladding provided to an outer periphery of the core and having a refractive index lower than that of the core, wherein, in a refractive index profile in a diametric direction of the multi-mode optical fiber, an α value of a portion corresponding to the core is 1.9 to 2.2, a maximum relative refractive index difference Δ of the core with respect to a reference region of the cladding is 0.8 to 2.4%, and a diameter wherein both maximum tensile stress and maximum compressive stress in the optical axis direction remaining in the core are 50 MPa or less, and wherein, in a residual stress distribution of the core, residual stress in a central region including the optical axis is one of the tensile stress and the compressive stress, and residual stress in a peripheral region surrounding the central region is the other of the tensile stress and the compressive stress.