Fluorine-doped optical fiber

US7526177B2 · kind B2 · utility

Assignee

• Draka Comteq B.V. · NL

Inventors

• Pieter Matthijsse · Hapert, NL
• Frans Gooijer · Sorocaba, BR
• Ivo Flammer · Paris, FR
• Elise Regnier · Bièvres, FR
• Gerard Kuyt · Eindhoven, NL

Key dates

• Filing date: Jul 3, 2007
• Grant date: Apr 28, 2009
• Expiry date: Jul 3, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03633
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A single mode optical transmission fiber comprises a depressed core having at least 0.41 weight percent fluorine and an index difference (|Δn1|) with pure silica greater than 1.5×10−3, a depressed cladding having at least 1.2 weight percent fluorine and an index difference (|Δn2|) with pure silica greater than 4.5×10−3 and an index difference (|Δn2|−|Δn1|) with the depressed core greater than or equal to 3×10−3.