Abstract: A device for making up a plurality of synchronously produced individual optical fibers includes a drawing installation for drawing the fibers and a take-up winder for winding up the fibers on a take-up spool. The drawing installation provides an identical and constant drawing rate for each of the fibers. The take-up winder has a compensating device to compensate for differences in speed of the fibers between the drawing installation and the take-up spool. Fluctuations of the fiber diameter during production of the fibers are avoided and the fibers are passed at a substantially constant rate to the take-up winder. A fiber bundle can be made up without influencing the drawing rate, thereby also avoiding reactions on the melting process when drawing the fibers from a heated preform. A method for making up a plurality of synchronously produced individual optical fibers is also provided.

Abstract: Step-index optical waveguides are made of multicomponent glass containing a core glass and an outer glass which entirely surrounds the core class. A fiber-optic cable for conducting electromagnetic radiation, contains at least one bundle of individual fibers which encompass the step-index optical waveguides that are made of multicomponent glass containing a core glass and an outer glass that entirely surrounds the core glass on the circumferential wall thereof. These step-index optical waveguides provide great transmission capacity for transmitting data while keeping the transfer characteristics sufficiently durable. Furthermore, the fiber-optic cable is resistant against physical and chemical environmental influences and be protected against radical ambient chemicals.

Abstract: Step-index optical waveguides are made of multicomponent glass containing a core glass and an outer glass which entirely surrounds the core class. A fiber-optic cable for conducting electromagnetic radiation, contains at least one bundle of individual fibers which encompass the step-index optical waveguides that are made of multicomponent glass containing a core glass and an outer glass that entirely surrounds the core glass on the circumferential wall thereof. These step-index optical waveguides provide great transmission capacity for transmitting data while keeping the transfer characteristics sufficiently durable. Furthermore, the fiber-optic cable is resistant against physical and chemical environmental influences and be protected against radical ambient chemicals.

Abstract: A device and a method for producing glass fibers from preforms use a fiber furnace having heating bushes and a follow-up device for holding and feeding the preforms. The glass fibers are passed on to a drawing and sizing installation and wound as fiber bundles on take-up spools. The heating bushes are disposed in a matrix-like configuration for receiving a number of preforms. The glass fibers are provided as a band such that the glass fibers are disposed next to one another when they are received by the drawing and sizing installation. The principal matrix axes have a given offset angle in relation to one another, such that the matrix-like configuration is preferably a rhomboid-shaped configuration. A flow device creates a predetermined air flow in the heating bushes. A temperature and cooling control creates predetermined temperature profiles in the heating bushes.

Abstract: The invention relates to a device (1) and a method for making up a multiplicity of synchronously produced individual optical fibers (2), in particular multicomponent glass fibers, from a multifiber drawing installation, with a drawing installation (3) and a take-up winder (4) for winding up the fibers as a fiber bundle (2) on a take-up spool (17). In order to produce and make up the fiber bundle (2) from a multiplicity of simultaneously drawn individual fibers (2) with little effort and at low cost while maintaining predetermined quality requirements, it is proposed according to the invention that the drawing installation (3) has means for producing an identical, constant drawing rate of the fibers (2) and that the take-up winder (4) has a compensating device (5) to compensate for differences in speed of the fibers (2) between the drawing installation (3) and the take-up spool (17). This achieves the effect that each individual fiber (2) is produced under the same conditions.

Abstract: Fiber end sleeve for fiber optic bundle and a method for the production of a metal end sleeve for a flexible fiber-optic light guide are provided. The method includes the steps of inserting a fiber bundle into a metal sleeve, and using a magnetic pulse-forming apparatus for deforming said metal sleeve radially inward onto said fiber bundle.