Radiation-resistant fluorine doped optical fiber

摘要

A single mode optical transmission fiber comprises a depressed core having at least 0.41 wt% of Fluorine and an index difference (”n 1 ) with pure silica greater than 1.5.10 -3 , a depressed cladding having at least 1-2wt% of Fluorine and an index difference (”n 2 ) with pure silica greater than 4.5.10 -3 and an index difference (”n 2 -”n 1 ) with the depressed core greater than or equal to 3.10 -3 .