OPTICAL FIBER WITH REDUCED STIMULATED BRILLOUIN SCATTERING AND LOW BENDING LOSS, AND OPTICAL TRANSMISSION LINE USING THE SAME, AND OPTICAL TRANSMISSION SYSTEM

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single mode optical fiber used in a signal transmission system. In particular, the present invention relates to an induction brillouin scattering and bending loss so that an analog signal having a high power can be transmitted with good characteristics even in a severe bending environment. The present invention relates to a reduced single mode optical fiber.;The optical fiber according to the present invention includes a core region having a radius r _core from the optical central axis and a clad region surrounding the core region. The core region is further divided into a first region and a second region, wherein the first region is located at the center of the core region, and the second region is located outside the first region. The first region has a refractive index distribution of a sine function, and the second region has a refractive index distribution of a Gaussian function.;Inductive Brillouin Scattering, Bending Loss, Singlemode Fiber