Patent ID: 6776012
Filing Date: 2004-08-17
Classification: C03B,C03C,G02B,Y02P

Abstract:
A method for making optical fiber, the method comprising the steps of:forming a glass core rod by soot deposition, the glass core rod having a core region surrounded by a cladding region; dehydrating the glass core rod in a first environment including oxygen and at least one of chlorine-containing gases, fluorine-containing gases and carbon monoxide; adjusting the oxygen stoichiometry of the first environment in such a way that it is neither oxygen-rich nor oxygen-deficient; consolidating the glass core rod; forming an overclad region around the glass core rod to form an overclad optical fiber preform; drawing fiber from the overclad optical fiber preform; and exposing the drawn optical fiber to an atmosphere containing deuterium.