Method of measuring characteristics of optical fiber and method of rewinding optical fiber

摘要

An optical fiber is immersed in a liquid having a low viscosity of not more than 1 Pa.s at 20° C., so that the liquid can permeate into gaps between turns of the optical fiber, and stresses, caused by a result of contact between the turns of the optical fiber, are eliminated, and in this state transmission characteristics of the optical fiber are measured.