折射率的分布是光纤的重要测量参数之一,其测量的方法甚多。近年来,对于光纤的折射率分布的非破坏性测量已进行了不少工作。本文采用“光束偏折法”进行非破坏性测量,共分二部分。第一部分是测定预制棒包皮的折射率值,第二部分是对没有包皮的预制棒 The distribution of refractive index is one of the important measurement parameters of optical fiber. There are many ways to measure it. In recent years, a great deal of work has been done on the non-destructive measurement of the refractive index profile of optical fibers. In this paper, “beam deflection method” for non-destructive measurement, is divided into two parts. The first part is to measure the refractive index of the prepaints and the second part is to evaluate the prepack