Patent ID: 7603008

Claim:
A method of manufacturing an optical fiber coupling part, comprising: mixing a silicon alkoxide, an alcohol, an acid or a base as a solvent, and a refractive index regulating substance to make a wet gel, wherein the refractive index regulating substance includes tantalum, antimony and zirconium; providing a concentration distribution of the refractive index regulating substance in the wet gel; drying the wet gel to make a dry gel; baking the dry gel to make a glass body; spinning the glass body into a thread; cutting the spun thread into a cycle length of ¼ as long as a zigzag cycle of a light propagated through the thread or a length that is an odd number times a length of ¼ of the zigzag cycle to make a GRIN lens; and fusing an optical fiber to one end of the GRIN lens.