Polyimide coated heavy metal fluoride glass fiber and method of manufacture
US5567219A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1994 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Jul 20, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/245
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of making a polyimide coated heavy metal fluorinated fiber includes the steps of drawing an optical fiber through a low-temperature curing polyimide solution to form a polyimide coating which cures in a range of about 200.degree. and 390.degree. C. A low curing temperature enables a low temperature profile to be used for curing the coating. The low-temperature curing conditions provide a maximum fiber exposure temperature above the glass transition temperature of the fiber but minimize crystallization of the fiber during curing. The method is also applicable to chalcogenide fibers which carry optical signals in the infrared region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.