Process for the manufacturing of optical waveguides with fusion of a sleeving tube onto a mother preform

US5127929A · kind A · utility

Assignee

• Alcatel N.V. · NL

Inventors

• Robert Gunther · Elzach, DE
• Ulrich Siemers · Lahnstein, DE
• Manfred Wittmann · Rutzenmoos, AT

Key dates

• Filing date: Sep 12, 1991
• Grant date: Jul 7, 1992
• Expiry date: Sep 12, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S65/16
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An optical waveguide preform is fabricated by inserting a rod inside a tube and collapsing the tube. The inner diameter of the tube is adjusted before inserting the rod to provide a predetermined gap width between the inner surface of the tube and the outer surface of the rod. The gap width is selected as a function of the cross sectional area of the tube in order to minimize core eccentricity in the finished waveguide.