SINGLE MODE OPTICAL FIBER HAVING REDUCED MACROBENDING AND ATTENUATION LOSS AND METHOD FOR MANUFACTURING THE SAME

摘要

A method for manufacturing an optical fiber having uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss is provided comprising controlling one or more of parameters including concentration of dopant in outer region and inner region of the core region with respect to middle region of the core region of the optical fiber preform duration of dehydration process step concentration of chlorine gas to control refractive index of outer region and inner region of the core region for achieving a fiber having substantially uniform refractive index profile and substantially reduced macrobending loss and attenuation loss.