Alcatel

Draka Comteq B.v.

John C Rosko

Leslie P Keller

Brian G Risch

Olivier Tatat

Neil Thomas Chabot

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

An optical fiber ribbon cable in which the edge fibers are protected from experience excessive stress from impact of the like during manufacturing, installation and use. The cable includes an optical fiber ribbon having a plurality of optical fibers arranged in parallel including edge fibers respectively located on opposite edges of the ribbon and interior fibers located between the edge fibers; and an optical fiber jacket surrounding the ribbon and defining a first space between said jacket and each of the edge fibers and a second space, contiguous with said first space, between said jacket and the interior fibers. The width of said first space adjacent the edge fibers is greater than a width of said second space adjacent the interior fibers.

Optical fiber ribbon in which the end fibers are protected from stress

A cable includes an optical fiber, a buffer tube having the optical fiber arranged therein, and a thermoset material for connecting the optical fiber to the buffer tube. The thermoset material will not melt or appreciably soften and will maintain basic elastomeric flexibility in a temperature range of &minus;40 to 70 degrees Celsius. The thermoset material may be a flame-retardant silicone elastomer, base and curing agent, as well as a liquid rubber molded compound, which is not flame-retardant. The thermoset material allows for fiber helix movement as the cable expands and contracts from &minus;40 to &plus;70 degrees Celsius, and is cyclically placed for connecting the optical fiber to the buffer tube at intervals of about every &frac12; meter, as well as at intervals of about every 10 meters. The cable is an indoor/outdoor flame retardant cable also having a fiberglass yarn matrix and a jacket, wherein either the buffer tube, the fiberglass yarn matrix, the jacket, or a combination thereof, is made from an optimal blend of polyvinylidene fluoride (PVDF) and flame retardant polyvinyl chloride (FRPVC). The indoor/outdoor flame retardant cable may have trace amounts of water swellable powder particles sprinkled on the optical fiber arranged inside the buffer tube.

Cycled fiber lock for cross-functional totally dry optical fiber loose tube cable

The present invention provides an indoor/outdoor cable having an optical fiber, a dry-loose tube, a fiberglass yarn matrix and a jacket, with water swellable powder. The dry-loose tube has the optical fiber arranged therein. The fiberglass yarn matrix has fiberglass yarns and is arranged about the dry-loose tube. The jacket is arranged about the fiberglass yarn matrix. Either the jacket, dry-loose tube, fiberglass yarn matrix or a combination thereof, is made from an optimum blend of FRPVC and PVDF in a ratio of 50% PVDF and 50% FRPVC. The ratio is in a range of 30-60% PVDF to 70-40% FRPVC. The diameter of the water swellable powder particles sprinkled on the optical fiber are less than 50 microns, are in a range of 10-50 microns, and are applied on the optical fiber with about 0.10-1.0 grams per meter. The indoor/outdoor flame-retardant cable also may have a cyclically-placed low viscosity elastomer for connecting the one or more optical fibers to the dry-loose buffer tube.

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Apex, NC, United States of America

John C Rosko