Bundle tube type optical cable
US6788858B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Feb 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/441
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A bundle tube type optical cable is disclosed. A bundle tube type optical cable comprises: a bundle of optical fiber tubes being arranged in the middle portion of the optical cable and each containing at least two optical fiber cores loosely arranged therein; a first water-blocking layer protecting the optical fiber cores in the optical fiber tube from external moisture by a water-blocking material filled in the inner space of the tube; an inner shell made of aluminum material enclosing the bundle of optical fiber tubes with a predetermined gap; a second water-blocking layer protecting the optical fiber tubes from external moisture by the water-blocking material filled in the inner space of the inner shell; and an outer sheath made of plastic material enclosing the outer surface of the inner shell. In this way, since the outer sheath layer enclosing the optical fiber tubes is constructed in a double layer structure of an inner shell of aluminum material and an outer sheath of polyethylene, the optical cable can be bent easily, can prevent moisture penetration into the optical fibers and can prevent shrinkage at low temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.