Patent · US Expired

Manufacture of optical fiber preforms using modified VAD

US6834516B2 · kind B2 · utility

1Cited by

1References

11Claims

0Family size

Assignee

Furukawa Electric North America, Inc. · US

Inventors

Donald Jablonowski · Dunwoody, US
Thomas E. McDonald · Acworth, US
Fengqing Wu · 流花街道, CN

Key dates

Filing date	Apr 24, 2002
Grant date	Dec 28, 2004
Priority date	—
Expiry date	Jan 18, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03B2207/70
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Dynamically controlling the reaction temperature at the tip of a soot preform by controlling the flow of hydrogen gas to the core torch provides a wide latitude of control over the temperature range necessary to produce uniform composition of the preform.

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