Single-mode optical fiber

US6529666B1 · kind B1 · utility

Assignee

• DEUTSCHE TELEKOM AG · DE

Inventors

• Wolfgang Dultz · Frankfurt am Main, DE
• Reiner Boness · Coswig, DE
• Joachim Vobian · Heilbad Heiligenstadt, DE

Key dates

• Filing date: Mar 2, 2001
• Grant date: Mar 4, 2003
• Expiry date: Mar 2, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03644
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The present invention relates to an optical single-mode fiber having low dispersion for the wavelength division multiplex operation (WDM) of an optical transmission path, which is made of a central fiber core having the radius r1, two inner fiber cladding layers having the outer radius r2 and a, respectively, where a>r2, and an outer fiber cladding layer, the refractive index profile n(r) of the fiber not being constant as a function of the fiber radius r (triple-clad fiber). By properly selecting the profile form and the refractive index differences between the core layers and cladding layers, respectively, conventional fabrication methods can be used to manufacture a fiber having low dispersion within the wavelength range of about 1400 to 1700 nm and, thus, in the third optical window, fiber attenuation not being increased thereby.