Dispersion-shifted optical fiber

US8055111B2 · kind B2 · utility

Assignee

• Draka Comteq B.V. · NL

Inventors

• Pierre Sillard · Le Chesnay, FR
• Elise Regnier · Bièvres, FR
• Marianne Bigot-Astruc · Marcoussis, FR
• Denis Molin · Draveil, FR
• Louis-Anne de Montmorillon · Paris, FR
• Simon Richard · Palaiseau, FR

Key dates

• Filing date: Apr 3, 2009
• Grant date: Nov 8, 2011
• Expiry date: Nov 3, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/02271
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A dispersion-shifted optical fiber (NZDSF) includes a central core (r1, Dn1), an inner cladding having at least three zones with a first intermediate cladding zone (r2, Dn2), a second ring zone (r3, Dn3) and a third buried trench zone (Wtr, Dnt). The buried trench zone has an index difference (Dnt) with the optical cladding between −5·10−3 and −15·10−3 and has a width (Wtr) between 2.5 μm and 5.5 μm. The present optical fiber, at a wavelength of 1550 nm, has reduced Rayleigh scattering losses of less than 0.164 dB/km, with limited bending losses.