Optical fibre having low splice loss and method for making it

US7849713B2 · kind B2 · utility

Assignee

• PRYSMIAN CAVI E SISTEMI ENERGIA S.R.L. · IT

Inventors

• Antonio Collaro · Torre del Greco, IT
• Giuseppe Ferri · Partanna, IT
• Alfonso Pannullo · Battipaglia, IT

Key dates

• Filing date: Dec 24, 2002
• Grant date: Dec 14, 2010
• Expiry date: Nov 1, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03611
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A process for making a non-zero dispersion shifted optical fiber having low splice loss and low attenuation and to an optical fiber produced by this process. A reduction of the splice loss is observed with decreasing drawing tension. The optical fiber has a core region that includes three segments and an inner cladding segment, each having a maximum refractive index percent difference, Δdeltai %, i=0-3, the subscript i referring to a particular refractive index, the core segments being selected such that Δdelta0%>Δdelta2%>Δdelta1%≧0 and Δdelta2%>Δdelta3%≧0. Optical fibers exhibiting low splice loss were drawn at tensions not larger than 150 g, preferably not larger than 100 g.