Optical cable

US4496214A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ulrich Oestreich · Munich, DE
• Werner Schubert · Wiesloch, DE

Key dates

• Filing date: Feb 17, 1982
• Grant date: Jan 29, 1985
• Expiry date: Feb 17, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4475
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The optical cable having an outer jacket and a plurality of optical transmission elements and auxiliary elements for receiving tensile loading, each of said optical transmission elements containing one or more fiber optical waveguides characterized by the optical transmission elements and auxiliary elements being stranded together around a central core with an alternating direction of twist, and a thin intermediate layer holding the elements in their place at a point of separation but allowing unstranding of the elements once the auxiliary elements are subjected to a longitudinal pull. Thus, the stranding of both the optical transmission elements as well as the auxiliary elements can be cancelled over a limited length for each element to produce an excess length for each of the elements.