Single mode optical fiber

US7623747B2 · kind B2 · utility

Assignee

• Draka Comteq B.V. · NL

Inventors

• Louis-Anne de Montmorillon · Paris, FR
• Pieter Matthijsse · Hapert, NL
• Pascale Nouchi · Palaiseau, FR
• Denis Molin · Draveil, FR
• Marianne Bigot-Astruc · Marcoussis, FR
• Pierre Sillard · Le Chesnay, FR
• Frans Gooijer · Sorocaba, BR
• Ivo Flammer · Paris, FR
• Yves Lumineau · Vierzon, FR

Key dates

• Filing date: Nov 6, 2006
• Grant date: Nov 24, 2009
• Expiry date: Nov 6, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03661
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical transmission fiber includes a central core having an index difference Δn1 with an outer optical cladding; a first inner cladding having an index difference Δn2 with the outer cladding; and a second buried inner cladding having an index difference Δn3 with the outer cladding of less than −3.10−3. The second buried inner cladding moreover contains Germanium in a weight concentration of between 0.5% and 7%. The fiber shows reduced bending and microbending losses whilst exhibiting the optical performances of a standard single-mode fiber (SSMF).