| 摘要 |
The present invention is a method of making a coated optical fiber comprising a first step of obtaining a glass optical fiber by drawing an optical fiber glass preform, a second step of forming the glass optical fiber with two layers of coating, and a third step of applying a twist to the glass optical fiber by using a swinging guide roller; wherein the glass optical fiber has a tension T of at least 2.2 (N/fiber) in the first step; and wherein T/R is 28 to 100, where R (m) is the barrel radius of the swinging guide roller, and the number of swinging movements of the swinging guide roller is 0.33 to 3.33 (s-1) in the third step. According to the present invention, the polarization mode dispersion (PMD value) of thus obtained coated optical fiber can reliably be reduced.
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