制作中等损耗到低损耗的波导纤维有很多方法,其中有四种属于沉积掺杂二氧化硅法(DDS),即气相氧化法的变型。这些方法已用于工业生产,并被世界各国一些生产光纤的主要厂家采用。图1概略示出这四种方法,现进一步介绍如下。 There are many ways to make medium loss to low loss waveguide fibers, of which four are variations of DDS, a gas phase oxidation process. These methods have been used in industrial production and are adopted by some of the major manufacturers of optical fiber in various countries in the world. The four methods are schematically illustrated in FIG. 1, which are further described below.