Doped quartz glass preparation method

A fluorine-containing low refractive index Yb3 + doped Shi Ying glass preparation method, the method using the sol-gel method from a solution, prepared by uniformly doped silicon oxide powder; powder decarburization, dehydroxylation, and finally calcined glass. Application of this method can be effectively incorporated F-, to obtain high uniformity, low hydroxyl content and a refractive index of pure Shi Ying glass almost the same rare earth doped Shi Ying glass. This process can produce a large-mode Shi Ying fiber high luminance is applied to the mandrel.