Draka Comteq B.v.

Alcatel

Alcatel Alsthom Compagnie Generale D'electricite

Les Cables De Lyon

Olivier Tatat

Jean-Pierre Bonicel

Alain Lavenne

Jean-Marc Testu

Brian G Risch

Bob J Overton

Klaus Nothofer

Peter Elisson

John C Rosko

Michael Yang

Jan Wigger Jonker

Christopher W McNutt

Jan Hennink

Arnoldus Gertrudis Wilhelmus Berkers

Magnus Gunnarsson

Jeffrey W Auton

Alain Avrons

Pierre Gaillard

Jean Marc Testu

The invention concerns a method of SZ stranding into one strand a bundle of two or more flexible micromodules, each micromodule comprising one or more optical fibers. A first pulley is located with its winding surface adjacent to a longitudinal axis of a cabling line. The bundle of micromodules is guided over the winding surface of the first pulley, the first pulley being rotating around the longitudinal axis of the cabling line. The rotational speed, or the rotational direction of the first pulley, is alternating.

Method of SZ stranding flexible micromodules

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%.

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

A method of manufacturing an aerial micromodule cable with excess length of an optical core is disclosed, the cable comprising a cable jacket defining a cavity in which the optical core is arranged, said cable having two rigid strength members embedded in the wall of the jacket; the method comprising guiding the cable over a wheel; wherein a first plane (P) intersecting the center of gravity (C) of the cable cavity is parallel to a second plane (P) intersecting the two rigid strength members, said first and second planes (P, P) being offset from each other, and wherein, during said guiding, the two rigid strength members are positioned closer to the wheel than the first plane (P) so as to cause the optical core to have a core excess length of at least 0.05%.

Aerial micromodule optical cable and a method of manufacturing said cable

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

An optical-fiber interconnect cable includes one or more optical fibers and one or more electrical conductors surrounded by an outer jacket. The optical fibers, such as multimode optical fibers, are typically enclosed within a flexible polymeric tube to form a flexible subunit.

Optical-fiber interconnect cable

The invention relates to a cable () that includes an outer sheath () defining a longitudinal cavity (). The cable () also includes a plurality of elements () extending within the cavity. Typically, the elements are at least partially coated with a lubricant film.

Cable having lubricated, extractable elements

Disclosed is a reduced-diameter optical-fiber cable that possesses a high fiber count and a high cable fiber density.

Optical-fiber cable having high fiber count and high fiber density

A buffered optical fiber () comprises a central core () surrounded by an optical cladding (), a coating () surrounding the optical cladding, a protective buffer () surrounding the coating and an intermediate layer () between the coating and the protective buffer. The intermediate layer consists of hot melt seal and peel material. The intermediate layer () may be extruded in tandem with the outer protective buffer ().

Buffered optical fiber and telecommunications cable

The present invention relates to optical-fiber modules having improved accessibility. In a typical embodiment, the optical-fiber module includes one or more optical fibers surrounded by an intermediate layer. The intermediate layer typically includes a polymeric medium with a liquid lubricant dispersed therein. A buffer tube encloses the optical fibers and the intermediate layer.

Optical-fiber module having improved accessibility

The invention relates to a flat telecommunication cable in which optical fibers are positioned within micromodules. The micromodules are coupled to a surrounding, ribbon-like cable jacket, thereby preventing the micromodules from sagging within the cable during vertical installations. The invention also relates to a method of extracting optical fibers from such a cable.

Optical fiber telecommunication cable

Disclosed is an improved optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optical fibers in accordance in the present invention may be incorporated into a reduced-diameter optical-fiber cable that possesses a high fiber count and a high cable fiber density. The high-fiber-density optical-fiber cable, which is suitable for deployments in ducts, is capable of achieving outstanding attenuation performance when subjected to temperature variations of between about &#x2212;40&#xb0; C. and 70&#xb0; C.

High-fiber-density optical-fiber cable

A buffered optical fiber structure includes an optical fiber, a mechanical reinforcement member extending along the optical fiber, a protective sheath having a cavity containing the optical fiber and the mechanical reinforcement member, and an intermediate material contacting the protective sheath and surrounding the optical fiber and the mechanical reinforcement member.

Buffered optical fiber

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

A telecommunication optical fiber cable possesses a longitudinal central cavity that receives micromodules of optical fibers positioned in parallel. A jacket surrounds the central cavity and a sheath is positioned on the inner periphery of the jacket. A lubricant is provided in the central cavity. The cable, which may contain more than 100 optical fibers, is suitable for an outdoor installation and enables a micromodule to be extracted over substantial lengths.

Growing community of inventors

Sangatte, France

Olivier Tatat