| 摘要 |
PURPOSE:To decrease the trimming loss of an optical fiber preform at both ends based on the whole length, and to improve the yield of the preform, by growing a porous glass preform on a seed rod, vitrifying the preform to a transparent glass to form an optical fiber preform, and forming the second optical fiber preform similar to the above optical fiber preform to the end of the preform. CONSTITUTION:A porous glass preform grown to the seed rod 10 is vitrified to a transparent glass to obtain the first optical fiber preform 14. Another porous glass preform 12' is grown to the tip of the preform 14. The grown preform 12' is vitrified to transparent glass to form the second optical fiber preform 14'. The trimming loss of the optical fiber preform 16 at both ends based on the whole length can be decreased, and the yield of the optical fiber can be improved by this process. |
