Draka Comteq B.v.

Alcatel

Alain Lavenne

Jean-Pierre Bonicel

Olivier Tatat

Jan Wigger Jonker

Jan Hennink

Arnoldus Gertrudis Wilhelmus Berkers

Vincent Bourget

Alain Avrons

Serge Pouilly

Oliver Tatat

Hubert Prunayre

Tatat Olivier

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 cable () includes a cable outer sheath () surrounding a cable core () and at least a ring () surrounding partly the cable outer sheath () so that the ring () presses the cable outer sheath () on the cable core () in a way adapted to increase a transfer, on the cable core (), of a pulling effort exerted on the cable outer sheath ().

Cable and cable pulling method

A method is proposed for access to optical fibers contained in an optical module, with a flexible structure for example, of an optical fiber transmission cable. The optical module includes a protective sheath in which the optical fibers are housed. Such a method includes: extracting the optical module from the transmission cable; degrading a portion to be stripped of the sheath of the optical module by heating to a specific temperature, for a predetermined duration; and accessing the optical fibers by stripping the portion to be stripped that has been degraded.

Method for accessing optical fibres included in an optical module of an optical fibre transmission cable

A cutter tool for cutting at least one optical fiber arranged freely in a cavity of a telecommunications cable, the tool including a cutting element and a tube, the cutting element being adapted to form a snare around at least one optical fiber to be cut, the snare providing two strands of filament adapted to be introduced in the tube, and the tool enabling an optical fiber branch connection to be made over a long distance through an existing tapping window.

Cutter tool and a method of making a branch connection with at least one optical fiber of a telecommunications cable

Disclosed is a method accessing one or more optical fibers in a telecommunication cable in a way that considerably reduces the risk of damaging the optical fibers. To avoid inadvertent damage caused by a cutting tool, the method includes moving optical fibers and/or micromodules away from the area on the cable that is to be cut.

Method for accessing optical fibers within a telecommunication cable

An optical fiber cable ( ) type comprises at least one tube ( ) having optical fibers ( ) housed therein. The optical fibers ( ) extend helically in a longitudinal direction inside the tube ( ). In the method of the invention, the tube ( ) is fed to the die for manufacturing the cable ( ) by unreeling the tube ( ) from the storage reel ( ) while the storage reel ( ) is held stationary, thereby conferring longitudinal twist on the tube ( ) constraining the optical fibers ( ) it contains to follow a helical path of pitch substantially equal to the length of one turn of the tube ( ) wound on the storage reel ( ).

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Calais, France

Alain Lavenne