Abstract: An optical transmission element comprises optical waveguides embedded into a UV-curing protective layer. The optical waveguides and the UV-curing protective layer are surrounded by a sheath, on which spherical elements are arranged. A conductive layer is applied on the sheath and the spherical elements arranged thereon, said conductive layer having a resistivity. of an order of magnitude of 5·1010 ohms per meter measured at a temperature of between 18 degrees Celsius and 24 degrees Celsius and a relative humidity of 45 percent. In the case of an optical transmission element of this type, electrostatic charging when the optical transmission element is blown into an empty conduit is avoided to the greatest possible extent, such that possible blowing-in lengths within a range of between 500 meters and 1000 meters are obtained.

Abstract: An optical cable comprises a swelling yarn, around which several optical transmission elements in the form of micromodules are arranged. A micromodule comprises a bundle of optic fibers, which are surrounded by a sleeve made from a material of plastic. Further swelling yarns are arranged around the optical transmission elements. The optical transmission elements and the swelling yarns are surrounded by a sleeve of paper. The paper sleeve is surrounded by a cable jacket made from a material of plastic. When an optic fiber is exposed, the cable jacket is pulled off, whereupon the paper sleeve tears off and can consequently be easily removed.

Abstract: An optical cable comprises a tight-buffered optical cable and a protective sleeve which surrounds the tight-buffered optical cable. An intermediate layer surrounds the protective sleeve has tension-resistant elements. Furthermore, the optical cable contains a cable sheath which surrounds the intermediate layer, and a transitional area facing its inner surface. In this transitional area, the material of the cable sheath is mixed with the tension-resistant elements of the intermediate layer.

Abstract: An optical cable comprises a cable core (100) containing at least one optical transmission element (10a, 10b). The cable core (100) is free of filler composition. It contains, as optical transmission elements, a plurality of tight-buffered conductors (10a) or a plurality of bundle conductors (10b) which are arranged around a centrally arranged strain relief element (20). The cable core (100) is surrounded by a sleeve (200), which is extruded or pumped around the cable core. The sleeve layer (200) contains a plastic material with which swellable materials, for example acrylates, are mixed as filler. A cable sheath (300) is extruded around the sleeve layer (200). The swellable filler embedded in the sleeve layer brings about an increase in the volume of the sleeve layer (200) upon contact with water, whereby the cable core (100) is sealed against penetrating moisture.

Abstract: In addition to the mechanical stresses caused by wind, icing, etc., the manufacturer of an optical aerial cable has to consider the electrical stress mechanisms (corona discharge, “tracking” effect) which lead to premature aging of the outer jacket by considering constructive measures and the use of special jacket materials. The outer jacket of the aerial cable contains several PE fusible fibers embedded into the jacketing material, whose conductivity is based on the content of carbon black in the amount of 10% of weight to 40% of weight. The resistance of these fusible fibers manufactured by coextrusion with the outer jacket is sufficiently low at 105 &OHgr;/m-109 &OHgr;/m, to discharge the induced electrical charges to the anchoring spirals fastened to the pole. No large potential differences in the longitudinal direction of the cable can occur on the wet, only partially dried jacket surface.

Abstract: A cable, which is suitable for installation into a canal or pipe, has a cable core (ZE, OA) and a cable jacket (KM1, KM2) surrounding the cable core. The cable jacket (KM2) has discrete elevations (LSA) on a base material of the cable jacket, which are formed as longitudinal strips stretching in the longitudinal direction of the cable (OC1). By providing the longitudinal strips (LS), the gliding friction during insertion of the cable into a canal or pipe is reduced, so that the cable can be inserted with comparatively lower force into the canal or pipe.

Abstract: In addition to the mechanical stresses caused by wind, icing, etc., the manufacturer of an optical aerial cable has to consider the electrical stress mechanisms (corona discharge, “tracking” effect) which lead to premature aging of the outer jacket by considering constructive measures and the use of special jacket materials. The outer jacket of the aerial cable contains several PE fusible fibers embedded into the jacketing material, whose conductivity is based on the content of carbon black in the amount of 10% of weight to 40% of weight. The resistance of these fusible fibers manufactured by coextrusion with the outer jacket is sufficiently low at 105 &OHgr;/m-109 &OHgr;/m, to discharge the induced electrical charges to the anchoring spirals fastened to the pole. No large potential differences in the longitudinal direction of the cable can occur on the wet, only partially dried jacket surface.

Abstract: In order to reduce the polarization-mode dispersion, disturbance mechanisms are provided along the length of the respective optical waveguide in a statistically distributed manner. The disturbance mechanisms bring about additional polarization-mode couplings for transmission light in the optical waveguide interior.

Abstract: A method and device for on-site producing a cable at the location for placing the cable includes a mobile device supporting an arrangement for forming a protective sheath of the cable and an arrangement for inserting the optical fibers or electrical leads into the sheath and then discharging the sheath into a cable laying position. The device may include an arrangement for forming a trench for receiving the cable, an arrangement for inserting a filling compound into the interior of the sheath as the leads or fibers are introduced therein and means for supplying a filling material for filling the trench subsequent to insertion of the cable therein.

Abstract: A method and device for on-site producing a cable at the location for placing the cable includes a mobile device supporting an arrangement for forming a protective sheath of the cable and an arrangement for inserting the optical fibers or electrical leads into the sheath and then discharging the sheath into a cable laying position. The device may include an arrangement for forming a trench for receiving the cable, an arrangement for inserting a filling compound into the interior of the sheath as the leads or fibers are introduced therein and means for supplying a filling material for filling the trench subsequent to insertion of the cable therein.