| 摘要 |
<p>Provided is an apparatus and method for manufacturing an optical fiber preform by supplying a high-frequency induction thermal plasma torch (1,2) with at least glass raw material, dopant raw material, and oxygen, and depositing the glass particles synthesized in the plasma flame onto a surface of a glass rod (6) that moves backward and forward relative to the plasma torch while rotating, wherein deposition of the glass particles is performed while cooling the glass rod. As a result, the concentration of fluorine doped in the cladding increase, thereby improving the relative refractive index of the preform.</p> |
