Patent · US Expired

Method of manufacturing optical fibres

US5188648A · kind A · utility

14Cited by

16References

5Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Peter E. E. Geittner · Aachen, DE
Hans-Jurgen E. Hagemann · Aachen, DE
Jacques Warnier · Eijsden, NL

Key dates

Filing date	Oct 16, 1991
Grant date	Feb 23, 1993
Priority date	—
Expiry date	Oct 16, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P40/57
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In the PCVD method glass is deposited in layers on the inner wall of a glass tube by heating the tube to a temperature between 1100.degree. and 1300.degree. C., by passing a reactive gas mixture through the glass tube from a gas inlet side at a pressure between 1 and 30 hPa, by forming a plasma in the interior of the glass tube, and by reciprocating the plasma between two reversal points. After a quantity of glass corresponding to the desired fiber optical construction has been deposited, the tube is collapsed to form a solid preform from which optical fiber are draw. The range of nonconstant deposition geometry at the preform entrance, (i.e. on the gas inlet side), is reduced by interrupting the reciprocating movement of the plasma at the reversal point on the gas inlet side.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.