Patent ID: 8824848
Filing Date: 2014-09-02
Classification: G02B

Abstract:
1. A multimode optical fiber comprising: a core extending along a predetermined axis and having a maximum refractive index n 1 and an outer diameter 2 a , and a cladding provided on an outer peripheral surface of the core and having a refractive index n 0 (<n 1 ) at an interface to the core, wherein in a cross section of the multimode optical fiber perpendicular to the predetermined axis, the core has a refractive-index profile n(r) a shape of which is defined by an exponent α(r) that varies with a distance r (0≦r≦a) in a radial direction from a center of the core, wherein the refractive-index profile n(r) of the core is defined by Expression (1) below: wherein when Δ wherein an average of variation d(α(r))/dr of the exponent along the radial direction satisfies Expression (3) below in a standard range in which the distance r is not less than 0.4 a and not more than 0.6 a