DE2237445A1 - FASTENING DEVICE FOR FIBER OPERATING FIBERS - Google Patents

Description

LIOENTIA
¹ Patent-Verwaltungs-GmbH
6000! Frankfurt (Main) 70, Theodor-Stern-Kai 1

Ulm (Danube), July 26, 1972 PT / üL / Bs / rß UL 72/97

for optical fibers

The invention relates to a fastening device for optical fibers.

Optical fibers serve as a transmission medium for the transmission of light, especially modulated light signals from a light transmitter to a light receiver.

Such optical fibers are usually made of glass, the refractive index of the glass in the core of the Optical fiber deviates from the refractive index of the one surrounding the core Coat. Optical fibers in which the diameter of the core is of the order of magnitude are particularly advantageous Light wavelength lies. ,.

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Optical fibers cannot be produced in any length. For reasons of easier laying, individual optical fiber sections are required for longer transmission routes to be provided. Isolation points are also required for light amplifiers in the transmission path.

To allow easy coupling of the optical fiber sections reach, plug-in connections have been constructed that allow ~ Τ "_ΊΙ7-3 ~~" alignment of the coupled fiber optic ends on a common optical axis and at a short distance from each other.

Due to the small diameter of the optical fibers throws their ßefestigung within such connectors big problems.

So far, the end of the optical fiber to be attached was in a glass capillary with an inner diameter that is about Outer diameter of the optical fiber corresponds, introduced and glued to her.

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This mounting of the optical fiber in a G-laskapillare is lengthy, as always a certain drying time of the adhesive must be _waited% for optimum coupling the optical fiber ends in the interface must / have no greater distance than a few u. In order to be able to maintain this small distance, the end face of the optical fibers embedded in the glass capillary must be polished after the gluing.

Another disadvantage is that after the adhesive has cured, this fastening of the optical fiber becomes loose is no longer possible. ~.

The invention is based on the object of a fastening device for optical fibers to be specified, which are the seams avoids an adhesive connection.

According to the invention, this fastening device consists of a cylindrical body, which is used to hold the optical fiber, is pierced in the direction of its longitudinal axis in the center, one end of which is conical, and in which by pressing on the cone-shaped end a optical fiber introduced into the bore can be clamped.

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Particularly advantageous also with regard to a lighter one It is the introduction of the optical fiber when the bore is in the direction of the longitudinal axis of the cylindrical body over * weighs a larger diameter than the Außenäurchmeeser the optical fiber and only on part of the conically ground end corresponds to the outer diameter of the optical fiber

The advantages of the fastening device according to the invention are in particular that the optical fiber without large expenditure of time can be attached. In contrast to known adhesive connections, this fastening can also be released again at any time. If a communication link made up of optical fibers should be interrupted due to damage to an optical fiber, needs In each case, only the damaged optical fiber is replaced

will.

The invention is through some exemplary embodiments with the Figures 1 to 6 explained in more detail.

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Part 'a) of Figures 1 to 3 represents ^ each a longitudinal section, Part b) shows a cross section of the relevant exemplary embodiment of the fastening device.

Figure 1 a shows a section in the longitudinal direction of the cylindrical Body 1 with the cone-shaped End 2. The bore 3 »the one in the longitudinal direction of the cylindrical Body runs in the center, serves to accommodate the optical fiber to be introduced from the left, To the To facilitate the introduction of the optical fiber into this hole, the diameter of the bore can be significantly larger than the outer diameter of the optical fiber. Cure in In a partial area 4- of the conical end 2, the bore 3 should be approximately the outer diameter of the lidite guide fiber correspond.

Figure 1b shows a cross section of this embodiment.

Figures 2 and 3 represent developments of the fastening device Here, the cylindrical body 1 is at its conical end 2 with a slot 5 provided.

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As shown in FIG. 2, this slot can be perpendicular to the face of the body in the direction of the diameter be performed or, as in Figure 3, in the manner of opposite one another Circular sectors be formed.

The slot depth in the longitudinal direction of the cylindrical Body 1 should be over the tapered end 2 don't go out. A slot designed according to FIGS. 2 or 3 is to be provided if the cylindrical slot Body 1 is made of a metal. If the cylindrical body 1 is made of plastic the exemplary embodiment according to FIG. 1 is suitable for this, since a slot of the type described is then not is absolutely necessary.

It is by no means necessary that the cylindrical body 1 consists of one piece. If it consisted of two Parts whose separation area bisects the body in the longitudinal direction could open the optical fiber to be fastened easily inserted into one of the parts.

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When pressure is exerted on the conical end 2 of the zyXinder-shaped body 1 is inserted into the bore 3 Introduced optical fiber in the area of the hole 3 / where their Diameter about the outer diameter of the fiber optic fiber corresponds, clamped »* ■.

The pressure on the cone-shaped end 2 can be exerted, for example, in that the end 2 is inserted into a correspondingly shaped bore in a plate 6, J ¹ Ig. 5.

The cylindrical body 1 can also, as in FIG. 6 shown at its the cone-shaped end the opposite end should be provided with a thread θ

By screwing on a sleeve 7 provided with a thread 9 can then also just attach the optical fiber the required pressure must be exerted on the conical end 2 «

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Claims (5)

- 8 - UL 72/97 Claims Fastening device for an optical fiber, characterized in that the fastening device consists of a cylindrical body which is drilled through to receive the optical fiber in the direction of its longitudinal axis in the center, one end of which is conical and which is conical by pressure formed end is an inserted into the bore optical fiber can be clamped. 2. Fastening device according to claim "), characterized by Ke -___ indicates that the bore in the direction of the longitudinal axis of the cylindrical body has the outer diameter only in part of its conical end corresponds to the optical fiber to be fastened, but has a larger diameter over the remaining length. 3. Fastening device according to claim 1 and 2, dajd.ux £ h_j; ekennzeich net « that the cylindrical body at its conical end with a slot - 9 -309886/0739 -9 - HL 72/97 is provided that is parallel to the bore and perpendicular to the The end face of the cylindrical body runs 4. Fastening device according to claim 1 and 2, characterized characterized in that the cylindrical body consists of two Parts can be assembled, the separation area between these parts is such that the longitudinal axis of the " cylindrical body lies in this interface, 5. Fastening device according to claim 1 and 2, characterized characterized in that the cylindrical body at that end which is opposite the conical end, on its outer jacket. is provided with a thread, one with a corresponding internal thread provided, the outer jacket of the cylindrical Body and its conical end narrow surrounding sleeve are screwed on. can.. • ■ ■ '■■ -. ■■ · -. ■■ ?. y 309886/0739