| 摘要 |
<p>A method of manufacturing a fluorine-containing optical fiber base material through a sintering process includes dehydrating a porous glass stack by heating it under a chlorine-based gas atmosphere, adding fluorine into the porous glass stack by heating it under a fluorine source gas atmosphere, and making the porous glass stack transparent by heating it under a fluorine source gas atmosphere at a higher temperature than a temperature at which the porous glass stack is heated in the adding. Here, process temperatures in the dehydrating, adding and making are T 1 , T 2 and T 3 (K) respectively, concentrations of the fluorine source gas in the adding and making are C 2 and C 3 (%) respectively, a parameter Q is represented by the formula: Q = C 2 ×exp(-T 2 /T 1 ) + C 3 ×exp(-T 2 /T 1 ), and the process temperatures and the concentrations of the fluorine source gas satisfy the relation Q > 0.14. The fluorine-containing optical fiber base material is also claimed.</p> |
