Draka Comteq B.v.

Jan Wigger Jonker

Jean-Pierre Bonicel

Olivier Tatat

Willem Greven

Alain Lavenne

Jan Hennink

Arnoldus Gertrudis Wilhelmus Berkers

Tyler Louis Angers

Oliver Tatat

Mark Edmund Lowell

An exemplary optical cable comprises a sheath surrounding a cavity and a plurality of modules arranged within the cavity with a filling ratio between 20 and 50%. Exemplary modules include four to twelve optical fibers and a tube surrounding the optical fibers. An exemplary tube has a layered structure including an inner layer of polycarbonate and an outer layer of low friction polymer, such as polyamide and/or fluorinated polymer. An exemplary tube has a ratio between its inner diameter (di) and its outer diameter (d) between 0.45 and 0.55, and its outer layer has a thickness between 0.05 and 0.15 mm. The filling ratio of the module is typically 55% or greater.

Optical cable with retractable modules and a method for producing said modules

An optical cable () comprises a sheath () surrounding a cavity () and a plurality of substantially parallel modules () arranged into said cavity () with a filling ratio between 20 and 50%; each of said modules () comprises: &#x2022;four to twelve fibers (), &#x2022;A tube () surrounding the fibers () that comprises a mix of polycarbonate and a low friction polymer, chosen from the group of fluorinated polymers and polyamide; said tube () having a ratio between its inner dand outer ddiameters between 0.45 and 0.55, and comprising an outer low friction polymer layer () having a thickness between 0.05 and 0.15 mm, &#x2022;A filling ratio of said modulegreater than 55%.

The present invention relates to loose-tube optical-fiber cables that are capable of operating in high-temperature environments.

Loose-tube optical-fiber cable

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Delft, Netherlands

Jan Wigger Jonker