Large bandwidth multimode optical fiber having a reduced cladding effect

US8867880B2 · kind B2 · utility

Assignee

• Draka Comteq B.V. · NL

Inventors

• Denis Molin · Draveil, FR
• Koen de Jongh · Son en Breugel, NL
• Pierre Sillard · Le Chesnay, FR
• Yves Lumineau · Vierzon, FR

Key dates

• Filing date: Jun 4, 2010
• Grant date: Oct 21, 2014
• Expiry date: Jul 13, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03627
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A multimode optical fiber includes a central core having a radius (r1) and an alpha-index profile. The multimode optical fiber further includes a depressed trench, which surrounds the central core, that has a width (wt) and a refractive index difference (Δnt) with an outer optical cladding. Typically, the central core's diameter is between about 47 and 53 microns, and the depressed trench's width (wt) is between 0.5 micron and 2 microns. The depressed trench's refractive index difference (Δnt) with the outer optical cladding is typically between −4×10−3 and −1×10−3.