DE3039347A1 - CONNECTION FOR HIGH-POLE LIGHTWAVE GUIDES - Google Patents

Description

BUNKER RAMO CORPORATION, 900 Commerce Drive, Oak Brook, rilinois 60521, V.St.A.

Connection for multi-pole fiber optic cables

The invention relates to a connection for high-pole single-ended conductors.

Recently, communication lines have been made from optical fibers for the parallel transmission of light pulses from one place to another increasingly. The areas of application have changed, although a special one significant scope the transmission of data from from one place to another by modulating a light source, at one end of the fiber optic cable being transmitted Enter data and at the other end of the cable this data can be retrieved with a photosensitive detector. Since the data is not transmitted in the radio wave range, the fiber optic cables are particularly suitable for applications that require a high level of security, as is the case in the field of data processing.

With the growing use of fiber-optic transmission lines is also the need has arisen connections to sheep IQ fen, which cable parts or cable ends with the least possible disadvantage in terms can be connected to the optical transmission. It has been shown that a precise axial and correct angular alignment between two fiber optic cables can be achieved by connecting the optical fibers of the

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Cables in connector assemblies in such a way that the optical fibers with respect to the outer dimension of the connector pins are arranged concentrically in alignment. When two connector pins are concentrically aligned, the final result is that the optical fibers are equally angularly and axially aligned are to transmit light waves efficiently.

While the state of the art in the field of connections has been developed, initially the emphasis on the development of connections of a small number of Channels laid. Recently there has been a growing interest and recognition of the need for suitable fiber optic connections for the optical connection of two multi-pole fiber optic cables, especially for individual fiber cables. For the sake of understanding it should be said that this interest developed out of the assessment of the fact that the extremely high capacities associated with fiber optic cables are expanded in a dramatic manner can be achieved by using multi-pole fiber optic cables. In particular, there is a growing need for development fiber optic connections that increase or expand capacity by several orders of magnitude. In addition, should such optical connections low attenuation losses and low have running crosstalk characteristics.

While the benefits of fiber optic connections for high-pole applications are appreciated, great importance is attached to them on the creation of practicable forms. So far it is not known or suggested as the goal of one fiber optic connection for the optical connection of two multi-pole optical waveguides with low damping losses and Crosstalk characteristics could be achieved. As a result, there have been no fiber optic connections for high-pole connections Applications, although there was a need for this and the need for such a need was known for a long time.

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The invention is therefore directed in the broadest sense to a connection of optical fibers for multi-pole optical waveguides, in particular to a process for the preparation of such compounds. The compound of the invention includes two connectors each having a rear end and a front, interengageable end exhibit. The connection according to the invention further comprises means at the front end of each connector to Connection of a multi-pole optical waveguide are arranged or formed. Each connector includes devices for arranging the optical fibers of a multi-pole optical waveguide in a very specific grid. The connector further comprises means for securing the connectors together at their front, in engagement with-

IS mutually bringable adjacent ends. With these design features η the connection is good for the optically aligned connection of two multi-pole optical waveguides suitable.

In particular, each connector preferably comprises a connector housing, which is provided with an opening which is suitable in size and shape, a multi-pole optical waveguide to take them in the longitudinal direction from their rear end to their front end entirely interspersed. The connector housings may have integrally formed devices which seal the connection. The sealing devices in turn comprise means which are connected to the rear ends and to those connected to the front ends Facilities are connected when the connector

SO attached to each other. The connection devices can in each case a surface for arranging the optical fibers of a multi-pole optical waveguide in a very specific beforehand have a fixed grid. The surface arranges the optical fibers of the two multi-pole optical waveguides in a suitable manner in parallel planes. In addition, the surfaces preferably each include an alignment element with

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sem formed holes receiving the optical fibers, which are arranged according to a very specific, predetermined grid. The number of holes is at least as large that they can accommodate the optical fibers of a multi-pole optical waveguide.

In one embodiment, the connection comprises a device device, which is arranged on at least one connector, to the connection means of the connector resiliently forward to press. The connector also suitably comprises a stop to prevent the forward movement of the connecting means, caused by the resilient device, limit. The resilient device is preferably a spring and the stop is preferably a retaining ring. The connector has a ring receiving a arranged in front of the connecting device Groove for receiving the retaining ring. Furthermore, behind the connection surface it has a spring supporting or bearing surface. The attachment means preferably comprises a first disposed on a connector Coupling element and a second coupling element arranged on the other connector. The first coupling element acts with the second coupling element together in such a way that they can fasten the connector housings to one another. Additionally the fastening device optionally has a device for limiting the interaction of the first coupling element with the second coupling element to control and / or control the separation of the optical fibers of two multi-pole optical waveguides to be able to control.

Other features of this embodiment of the invention include means for orienting the two Connector in such a way that the optical fibers of two multi-pole optical waveguides are optically aligned with one another when the connector are attached to one another with their front, adjacent ends. The means of orientation or alignment can also at least two on the connection device one

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pins attached to the two connectors and a corresponding number of pins receiving the pins on the connector of the other connector has formed openings.

The optical connection of two multi-pole optical waveguides can also be achieved by means of a further embodiment of the subject matter of the invention. The connection comprises two connector housings each having a rear end and a front end. They are provided with openings that completely penetrate them in the longitudinal direction and extend from their rear end to their front end, the opening in each connector housing being designed in terms of size ¹ and shape so that it can accommodate a multi-pole optical waveguide. The connection further comprises means which are connected to the front end of each connector housing for connecting a multi-pole optical waveguide to each connection device. The connecting device comprises a surface for arranging the optical fibers of a multi-pole optical waveguide in a predetermined grid, which is determined by holes formed in the surface, the number of which is large enough to accommodate the optical fibers of a multi-polar optical waveguide. The connection further includes means connected behind the face to each of the connector housings for providing stress relief to the optical fibers of a multi-pole optical fiber. Furthermore, a device is provided for fastening the front ends of the two connector housings to one another. When connecting optical light waveguides with such design features, care must be taken that two multi-pole light waveguides are optically aligned after their connection.

Other features of this embodiment include connector housings each having a device connected to them for their sealing. The sealing device has preferably one at the rear ends of the connector

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housing arranged device and one at the front Ended device when the connectors are attached to one another, in the form of a resilient O-ring, which is arranged in a circumferential groove formed in a connector housing. The connection device preferably comprises an alignment plate covering the aforementioned surface and one behind the alignment plate has arranged back plate, which serves the surface as a hold or as a support. In addition, the alignment plates are preferred attached to the back panels.

In particular, the back plates each have a bore that corresponds to the corresponding bores of the optical fibers receiving holes at least matches or covers them.

The optical fibers of a multi-pole optical fiber then go through the enlarged bores of each of the back plates through to the corresponding hole in the alignment plates, where they are attached. The connection facility suitably comprises means for orienting or arranging the two connector housings such that the optical fibers of two multi-pole optical waveguides are optically aligned with one another when the connector housing with its front, facing ends are attached to one another. The device for orientation or for alignment has at least two pins which are arranged on the terminal device of a connector housing. Furthermore is on the connecting device of the other connector housing has a corresponding number of openings receiving the pins intended. The pins are preferably formed in the alignment plate and in the back plate of a connector housing, the pin-receiving holes attached. The alignment plate and the back plate of the other connector housing have a corresponding number of openings receiving the pins. In one embodiment, they have the pins receiving openings an escape hole and an escape slot on. The escape hole and slot can

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the pens for their alignment university? and to align the Record interlocking connector housing.

Further details of this embodiment can be a rigid insert in at least one connector housing which is secured against backward movement in the latter. One in A groove running around the circumference serves as a support surface for a tongue. The spring support surface is provided to one between the rigid insert and the back plate arranged spring to serve as a support that holds the back plate within of the connector housing pushes forward and on the other hand presses against a retaining ring which is formed in a connector housing, the ring receiving groove is arranged. It should be particularly emphasized that the use is therefore preferred is spaced behind the back plate, and that furthermore the optical fibers in the area between the back plate and the rigid insert can preferably bend freely. The back plate and the alignment plate preferably comprise two with corresponding slots in the rigid insert cooperating pins which couple the terminal device to the connector housing such that they are relatively can move to each other in the axial direction. In addition, the connection preferably has a spacer in the form a flat sheet which is provided with an opening penetrating it and at least the optical fibers covering the receiving holes. The spacer works together with the spring to separate the two high poles To be able to make optical waveguides in a controlled or controlled manner. The connection device is arranged so that it contacts the spacer when the connector housings are secured together.

Other advantageous features may include an element located and secured behind the backplate of each connector housing to support the backplate. The connection devices can each comprise a block, one of said Has a front surface that forms a surface as well as a varielLeaeu Kücks £ itige surface which is completely penetrating with it.

These holes penetrate the blocks from their rear surface to their front surface. The blocks are also each manufactured with high precision, the optical fiber receiving holes provided in the front surface, which with the above-mentioned holes in Connected. The compound according to the invention can also a device for orienting or aligning the connector housings in the form of a connection device formed projection on the one hand and one formed on the other connecting device, the projection receiving groove on the other hand, so that the optical fibers of two multi-pole optical waveguides optically with each other align, .wenn the projection is arranged in the groove receiving it. The device for stress relief can consist of a potting compound which is connected to each of the two connector housings, with an elastic potting compound is preferably located near the rear ends of the connector housing, while in front of the elastic Potting compound a rigid resin compound is arranged. The inventive Connection may be one formed on a connector housing and provided with an internal thread Have coupling ring and an externally threaded surface formed on the other connector housing is. Optionally, a device for limiting the screw-in depth of the two to be screwed into one another can also be used Coupling parts may be provided to control the separation of the optical fibers of two multi-pole optical waveguides or to be able to control. Finally, the predetermined grid can be defined by at least one series of the optical fiber receiving holes. Preferably, however, the grid should consist of a large number of rows and this transverse or perpendicular transverse rows of the optical fibers receiving holes be determined, the surfaces each one consisting of a metal perforated escape plate, which is arranged with rows and transverse rows of the optical fiber receiving holes is provided.

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The inventive method for producing a fiber optic Connection for the optical connection of two multi-pole optical fibers with one another consists of the following Procedural steps: first, connectors with a rear end and a front end that can be brought into engagement with one another. Second is a connector created for connection to the front end of each connector. Third, in every connection facility optical fiber receiving holes are formed. Fourth, one of the connector devices in the front end becomes each Connector arranged or attached. Fifth, the optical fibers of a multi-pole optical waveguide are inserted into the optical fiber receiving holes in each of the terminal devices attached. The connection devices are preferably made of metal. The ones receiving the optical fibers Holes are preferably made with the help of a metal etch process trained.

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Further features, details and advantages emerge from the following description of preferred embodiments of the invention as well as from the attached drawing. Here show:
5

Fig. 1 is a longitudinal section through a connection for connection

optical fibers according to the invention; 1A shows a longitudinal section through a further embodiment a connector according to the invention; 2 shows an enlarged illustration of a detail of a

Connector according to Figure 1;
3 shows an enlarged illustration of a detail of a connector according to FIG. 1;

Figure 3A is an enlarged view of a detail of the connector according to FIG. 1A;

Fig. 3 is a front view of one form of alignment plate; a front view of another embodiment of FIG Alignment plate;

Fig. 3 is a front view of one shape of a back plate; 7 is a front view of another embodiment of FIG

back plate;
8 shows a front view of a further embodiment of the connection device;

9 is a longitudinal section through a further embodiment of the · Connection device;

FIG. 10 shows an enlarged illustration of a detail of the FIG

Fig. 9 shown connecting device; 11 shows an enlarged illustration of a detail of the FIG Fig. 9 shown connecting device; 12 shows an enlarged illustration of a detail of a

further embodiment for control or control the separation of the connection device; 13 shows a partially sectioned illustration of splice boxes and fusion splicing for use in connectors for the optical connection of two multi-pole fiber optic cables according to the invention;

14 is a front view of an alignment plate for use

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Fig. 4th Fig. 5 Fig. 6th Fig. 7th

with multi-pole light waveguide ^ and Fig. 15 is a front view of another alignment plate for use in a multi-pole light waveguide.
5

According to Fig. 1, the connection 20 for the optical connection of two multi-pole light waveguides according to the invention two connectors 22,24, each having a rear end 26,28 and a front end that can be brought into mutual engagement Have end 30,32. The connection 20 includes devices 34 or 36, which are connected to the front ends 30 and 32 of the Connector - 22,24 for connecting a multi-pole optical waveguide (About the light waveguide 38 and 40) are connected, the connecting devices 34 and 36 IS in turn means 42, 44 for arranging the multi-pole optical waveguides (about 38.40) in a very specific position. The connection 20 also includes a device 46 for fastening the connectors 22 and 24 to one another, the front of which can be brought into operative connection with one another Ends 30 and 32 lie against one another. With these design features, the two multi-pole optical waveguides are in the connector 20 38 and 40 brought into flight.

Referring to FIGS. 2 and 3, connectors 22 and 24 include connector housings 48 and 50 formed with openings 52 and 54 are provided, the size and shape of which is such that they a full length from their rear ends 26 and 2 8 up to their front ends 30 and 32 penetrating high-pole optical waveguides can accommodate. The connector housings 48 and 50 each have a device formed in one piece with these for creating a tight Connection on. This device comprises means 56 and 58 attached to the rear of the front ends 30 and 32, and means 60 connected to the front ends 30 and 32.55 when the connectors 22 and 24 are fastened together

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are. The connection devices 34 and 36 each have means 42 and 44 for the arrangement of multi-pole light waveguides in a predetermined grid. The means 42 and 44 are each provided with an alignment part, the holes 62 and 64 for receiving optical fibers (as shown in Figs. 4 and 5), the number of which is dimensioned at least so large that they accommodate the optical fibers of a multi-pole optical waveguide can. In addition, the means or alignment members 42 and 44 preferably provide that the optical fibers of the two multi-pole optical waveguides 38 and 40 come to lie in parallel planes and that the previously determined The grid is determined by the holes 62 and 64 in the alignment parts 42 which accommodate the optical fibers and 44.

Referring now to FIG. 3, connector 20 preferably further includes means 66 which connect to at least one connector 24 is to resiliently press the connector 36 forward therein. The connector 24 also includes a Stop 68, which limits the forward movement of the connecting device 36 caused by the resilient device 66 will. The resilient device 66 is preferably a spring, while the stop 68 is preferably of a Retaining ring is formed. In this construction, the connector 24 preferably has a ring receiving groove 70 for the retaining ring 68 on the outside of the connection device 36 as well as a surface which carries or supports a spring 72 for the one arranged on the rear side of the connection device 36 Spring 66 on.

With reference to Fig. 1, Rs is particularly pointed out, that the fastening device 46 preferably has a first coupling part 74 connected to one of the connectors 22 as well as

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a second connected to the other connector 24 Has coupling part 76. The first coupling part 74 can with. brought the second coupling part 76 in operative connection to secure connector housings 48 and 50 together. In addition, the fastening device 46 advantageously a device 80, which the interaction of the first coupling part 74 is limited to the second coupling part 76. This limiting device 80 preferably comprises a device for controlling the separation of the optical fibers of the multi-polar light waveguide 38 and 40.

Referring to Figures 2 and 3, the connectors 22 and 24 preferably include means 82 for aligning the two Connector 22 and 24, so that the optical fibers of two multi-pole optical waveguides are in optical alignment when connectors 22 and 24 are secured together with their forward ends 30 and 32 butted together. In a preferred embodiment of the invention has the means 82 for aligning the two connectors

22 and 24 have at least two pins 84 which are connected to the connecting device 36 of one of the two connectors 24 are connected. The device for aligning the connectors 22,24 also has a corresponding number of the Pins 84 receiving openings 86 in the connecting device 84 of the other connector S 22 are formed,

In particular, the connection comprises devices 88 and 90, which are provided with the connector housings 48 and 50 behind the means or surfaces 42 and 44 to relieve stress for the optical fibers of a multi-pole optical waveguide 38 and 40 to form. The means for stress relief 88 and 90 preferably comprise a casting compound, connected to each of the connector housings 48 and 50

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is. A potting compound preferably works with each of the Connector housings 48 and 50 together and preferably includes a resilient mass (such as 88 'and 90') attached to their rear ends 26 and 28 are connected. Furthermore, the potting compound 88 comprises a rigid or solid resin compound 88 ″

and 90 "in front of the elastic mass 88" and 90 ". The stress relief devices 88 and 90 can also be used to separate the individual components within the connector 22 and 24 to be connected tightly to one another. As can be seen from Fig. 1, the elastic mass 88 'acts with the rear End 26 of the connector 22 together, while the elastic mass 90 'with the rear end 28 of the connector

24 and in particular with the retaining groove 92 cooperates to the individual components or parts within the To hold connector 22 and 24 together.

As FIGS. 2 and 3 show, the connection devices comprise 34 and 36 alignment plates 42 and 44 and back plates 94 and 96. The alignment plates 42 and 44 have the alignment surfaces on. The back plates 94 and 96 are positioned behind the alignment plates 42 and 44 to act as a stop or stop for them. The back plates 94 and 96 have enlarged openings 98 and 100 (FIGS. 6 and 7). The openings 98 and 100 should be made at least so large that they accommodate the corresponding openings of the optical fibers Holes 62 and 64 correspond, which are shown in Figs. 4 and 5, respectively. In addition, the optical fibers prevail a multi-pole optical fiber * (38 or 40) the enlarged openings 98 and 100 of the back plate 94 or 96 up to the corresponding openings of one of the two alignment plates 42 and 44 attached to the back plates 94 and 96, with the optical fibers in turn attached to the alignment plates are attached.

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It should be particularly emphasized that the alignment plate 44 and the back plate 96 of one of the two connector housings 50 has at least two bores 102 receiving the pins 84, with the pins 84 secured therein. The alignment plate 42 and the back plate 94 of the other connector housing 48 comprise a corresponding number of openings 86 in front of the pins 84. The openings preferably have 86 an escape hole 86 'and an escape slot 86 "in of the alignment plate 42 and the back plate 94 of the connector housing 48, with the alignment hole 86 'and the alignment slot 86 "which can accommodate pins 84 to make the interlocking Align connector housings 48 and 50 and align them.

According to Pig. 3, the connector housing 50 can have a rigid or fixed insert 104 on the inside. The insert 104 is preferably secured against rearward movement (FIG. 1) within connector housing 50. The insert 104 preferably a circumferential groove 106, which the tongue 66

> 0 supporting surface 72, as shown in FIG. 3. The use 104 is preferably spaced from the rear of the back plate 96, which is why the optical fibers 40 can bend freely in the area between the back plate 96 and the insert 104, as shown in FIGS. 1 and 3

> 5 is. The insert 104 preferably has two slots 108 and 108 110, which cooperate with the pins 84 such that the terminal device 36 is fixed to the connector housing 50 is that it can move axially with respect to the latter, as shown in FIG. The insert 104 also includes one

■, 0 at the opening 114 circumferential groove 112 to a resilient seal or to accept an O-ring 58. One of the optical fibers every light wave! 122 provided optical fiber optic cables is arranged opening 114 in insert 104 along at least a portion

; 5 its length provided with a sufficiently large diameter to the outer jacket 122 of the fiber optic cable 118 to accommodate. The eye ring or O-ring 58 works with the outer envelope of the fiber optic cable 118 "so that it forms a seal

130Q2Q / 06S8

forms.

As best seen in FIG. 3, the connection 20 a spacer 124 connected to at least one of the alignment plates 44. The spacer 124 acts with the spring 66 together in such a way that there is a controlled separation of the two multi-pole optical waveguides' 38 and 40 of the optical fibers allowed. The connecting means 16 and 36 are preferably arranged so that they are with the spacer means 124 come into contact when the connector housings 48 and 50 are secured together. The spacers 24 comprise a flat sheet that is attached to one of the two alignment plates 44 and one that penetrates it (not here has shown) opening which at least coincides with the holes 64 receiving the optical fibers. Alternatively can the planar spacer 124 consist of a transparent film separator, in which case no opening in the Area of the optical fiber receiving holes is required.

Referring to FIG. 2, the connector 20 may include means 128 for supporting at least one of the back plates 94. The support device 128 is preferably a component arranged on the rear side of the back plate 94. It should be emphasized here that the ^ tückplatte 94 supporting support device 128, as shown in FIG. 2, is substantially a cylindrical member, which is just sized to it in which the solidified resin mass 88 · ^f in the opening 52 female connector housing '48 fits in. The support means 128 for the back plate 94 preferably has two diametrically opposed holes 130 which lie exactly in line with two diametrically opposed holes 132 in the connector housing in this construction. The support device 128 can be secured within the connector housing 48 by means of pins 134.

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1A and 3A is an alternative embodiment of the connector S 24 of FIGS. 1 and 3 is shown in its entirety. The connector 24 'is entirely identical to the connector 24, but with one significant difference. It should be particularly emphasized here that the resilient device or spring 66 according to FIGS. 1 and 3 in FIGS. 1A and 3A in favor of one rigid construction has been omitted. The connector 24 ' therefore has a fixed in this alternative embodiment or rigid insert 104 'with a slightly different shape. In particular is the insert 104 'between an inner shoulder 136' formed in the connector housing 50 and the backplate 96 'arranged.

It should be noted that the backplate 96 'and insert 104' are secured in the connector housing 50 'by means of the retaining ring 68'. be held. The back plate 96 'and insert 104' are sized and shaped to fit together in the connector housing 50 'against the inner shoulder 136' comfortably fit. In contrast, it should be emphasized that the back plate 96 and the Insert 104 of the embodiment shown in FIGS. 1 and 3 have a distance from one another, the insert 104 abuts inner shoulder 136 formed in connector housing 50. The insert 104 ', however, lies on the back plate 96 'rigidly. Accordingly, connector 24 'represents a different alternative to connector 24, albeit with the same basic techniques can be used in the connection of multi-pole optical waveguides.

Other details of the embodiment according to FIGS. 1A and M) 3A are essentially the same as in the embodiment according to FIGS. 1 and 3 with small exceptions. One exception is the shape of the insert 104 ′, which has a larger diameter for the opening 138 and a smaller diameter for the opening 140. The opening with the larger diameter and the opening with the smaller diameter are with

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filled with a rigid casting resin in order to secure the optical waveguide 40 ^f at a considerable distance behind the back plate 96 '. Another exception is that the location at which the outer covering 122 'is stripped from the optical waveguide 40' is on the rear side of the insert 104 '. In this construction, the fiber optic cable 118 'is secured entirely within the rigid resin, and not in the insert 104'.

According to FIGS. 2 and 3, the enlarged openings 98 and 100 filled with epoxy resin 142 and 144. In this way, the bundles of optical fibers 38 and 40 are within the backplates 94 and 96 secured or attached. It should be particularly emphasized here that the illustrated in FIGS. 1A and 3A alternative embodiment also an enlarged one opening 100 'that is covered with epoxy 144' in the backplate 96 is filled, whereby the optical waveguide 40 'is fixed within the backplate 96' in a similar manner is. As a result of this measure, the optical waveguide 40 'is inserted at a point directly behind the alignment part 44' Provides support. Of course, the epoxy resin 142 and 144 in Figures 2 and 3 also provides support and support, respectively the optical fibers immediately behind the alignment members 42 and 44.

As previously indicated, the optical fibers 38 and 40 are sealed within the back plates 94 and 96 with epoxy 142 and 142 attached. This provides the optical fibers within the enlarged ones formed in the back plates 94 and 96 Bores 98 and 100 a support, wherein the epoxy resin forms a strain relief for the optical fibers. Furthermore are the optical fibers in each of the optical fibers on the corresponding alignment members or plates 42 and 42 44 fixed inside the optical fiber receiving holes 62 and 64 by means of epoxy resin.

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8 to 10 is a further embodiment the connection devices shown. The connection devices 146 and 148 comprise blocks with front faces 150 and 152, which define or delimit surface parts. Blocks 146 and 148 also have rear portions or surfaces 154 and 156 and are with them substantially from the rear surfaces 154 and 156 up to Bores 158 and 160 penetrating through the front surfaces 150 and 152 are provided. Blocks 146 and 148 instruct Their front surfaces 150 and 152 also have holes 162 and 164 made with high precision for receiving the optical Fibers, which are in communication with the bores 158 and 160 (FIG. 10). In addition, the bores 158 and 160 have larger diameter regions 158 'and 160'. The areas in between 158 ″ and 160 ″ of the bores 158 and 160 lead very close to the front surfaces 150 and 152, in which the high Precision molded optical fiber receiving holes 162 and 164 are machined.

Referring now to Figures 9 and 11, there is shown means for aligning connector housing parts 48 and 50. Alignment means or centering device 166, which is an alternative solution to that shown in FIGS The solution of the pins 84 engaging in the openings 86 can be a projection 168 on one of the connecting devices 148 as well as a groove 170 receiving the projection 168 on the other connecting device 146. In this construction, the optical fibers of the two multi-pole optical waveguides 38 and 40 are optical aligned when the protrusion 168 is in the receiving it Groove 170 comes to rest. The projection 168 and the groove 170 can be sized so that a gap 172 between the two connection devices 146 and 148 arises to to control the separation between the optical fibers of two optical waveguides.

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Referring to Figure 12, there is an alternative means of controlling the separation of the optical fibers of two multi-pole optical fiber shown on an enlarged scale. This embodiment can take the place of the Protrusion 68 and the protrusion receiving groove 170 step in FIG. 11. Here, a transparent film 174 is simply used between the connectors 146 and 148. However, this is not a means of aligning the precision-made optical fibers receiving holes 162 and 164 in the front surfaces 150 and 152 of blocks 146 and 148 are provided. As a result, could means other than those mentioned above can be used to achieve this end.

According to FIG. 1, the fastening device 46 has a an internally threaded coupling ring 74 having a connector housing 48 and one on the connector housing arranged external thread can be connected. The one with. The coupling ring 74 provided with the internal thread is suitable screwed to the external thread 76 in a suitable manner to become. It should be emphasized that the fastening device 46 also has devices for limiting the screw-in depth of the two parts 74 and 76 to be screwed together. The limiting device 80 has control means or to control the separation of the optical fibers of the two high-polarity Optical waveguides 38 and 40. In particular, the limiting device 80 can optionally be a suitable one Dimensioning of the front ends of the connectors 22 and 24 so that the surface 176 of the connector 24 cooperates with surface 178 of connector 22 to facilitate separation of the alignment members or plates 42 and 44 check. Referring to Fig. 13, the optical fibers of each optical waveguide 38 and 40 can be suitably integrated into one Splice box 180 can be connected. The splice box has openings 182 at each of its ends for receiving the optical fibers of an optical fiber optic cable. It

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It should be emphasized that the splice box has tubular extensions 184 through which the optical fibers in the Splice box 180 can be inserted for fusion splicing. The extensions or projections T84 act with the Bend 186 together so that the outer sheath of the fiber optic cable is clamped to relieve stress will. A splice box having such constructional features enables the optical fibers to be easily assembled Manner to be joined together by fusion splicing in a manner that protects the splice connection.

In particular, the splice box 180 allows the ... most critical components to be machined. It should be emphasized that the connection according to the invention can be fully assembled with the fiber optic cables 116 and 118 connected in the connectors 22 and 24. The splice trays 180 may at the ends of optical fiber cables 116 and 118 _n from the connector be applied removed 22 and 24 to the optic light guide cable 116 and 118 in much larger quantities with each other to be connected, depending on the requirements of a particular application. This enables a maximum of quality control both in the highly critical assembly and in the connection of the multi-pole optical waveguides.

In Figures 4 and 5, the predetermined grid is defined by at least one row of optical fiber receiving holes 62 and 64 determined. However, the subject matter of the invention is in particular advantageous for pre-established grids, which are created by a multitude of rows and transverse rows of the optical Fiber receiving holes 62 and 64 are defined as shown in Figures 14 and 15 where eight rows and eight transverse rows are shown for purposes of illustration only, as the exact number of rows and Ouer-rows will be varied

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can, depending on the needs of a particular application. The surfaces 42 and 44 perforated metal alignment plates that align with the rows and columns of the optical Fibers receiving holes are provided.

In the manufacturing process of an optical fiber connector for the optical connection of two multi-pole optical fiber bundles follow the steps below. First, two connectors 22, 24 are created, each one on the rear End and a forward, mutually engageable end. Second, a connector is used for connection of the front end of each connector. Third, holes are made in each connector for receiving of the optical fiber formed in a very specific grid. Fourth, there is a connector in the front Attached to the end of each connector. Fifth, the optical fibers of a multi-pole optical waveguide are used in attached to the optical fiber receiving holes in each connector. The connection devices are preferably made of metal. The holes receiving the optical fibers are formed by means of metal etching.

With the connection for multi-pole fiber optic cables according to Invention it is possible to create a light guide density that covers hundreds of channels within commercially available Fittings can be expanded. The loss of attenuation at the junction and the maximum crosstalk between Channels is extremely low. Means for closing or splicing the fiber optic cable connectors within of the running cable are available, as well as means for potting light guides in commercially available Fittings.

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at
The loss of attenuation of the connection point can be further reduced by optical anti-reflection coatings on the factory-made connection points. Although screw connections have been described, other couplings, for example with a bayonet lock, can of course also be used in accordance with this invention.

With respect to the joint, the alignment members or plates are highly effective. These plates are suitably made of very thin precision machined stainless steel and are provided with holes for receiving the optical fibers, as well as with holes for the pins to align the connection and with precision machined slots. The connectors can suitably be provided with connection ends one meter in length for fusion splicing to form a cable harness. With this type of approach, factory manufacturing is possible so that the very critical assembly and inspection operations are located in the place with the most talented workforce. Only the fusion splicing is left to the less talented staff. In the alternative embodiment according to the representations in FIGS. 8 to 12, the production of the surfaces that are operatively connected to one another can be carried out in the following work steps. First, a photolithographic mask is prepared from a fiber optic assembly. Second, a plate is made from base material (e.g. copper). Third, the plate is provided with pilot holes on its rear side, very close to the front of the plate. Fourth, the front of the plate is given a mirror finish by means of rags and the photolithographic mask is placed on it in order to apply an absorbent material to it. Fifth, a laser drill is focused on the darkened areas of the absorbent material to burn through the remainder of the plate from the front surface until the holes drilled from the front and the back are in communication. Although he-

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it can be waited that the holes drilled from the front and from the rear do not quite coincide in their axes agree, this will not be large enough to rule out that the align Fibers introduced from the rear are passed through the front of the plate.

With the various concepts and techniques practiced here, a connection is made for multi-pole fiber optic cables and a method for making such compounds has been provided. The invention includes design features which are well suited for the optical connection of two high-polarity optical waveguides, one of which is surprising advantageous combination and arrangement of the components and alternatives to this are used, which make it possible to increase the capacity of the known optical waveguides by several orders of magnitude. Accordingly, it is particularly emphasized that the goal of creating a multi-pole optical waveguide, in which the in the optical waveguide technology very substantial problems of loss and of Cross-talk characteristics have been resolved, has been achieved.

130020/0658

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Claims (38)

BUNKER RAMO CORPORATION RP 78008 LW / de 900 Commerce Drive
Oak Brook, 111. 60521
United States PATENT CLAIMS C \ .j connection for multi-pole optical waveguides, characterized by two each, one rear end (26, 28) and one in
Interlocking front end (30,32) having connectors (22,24) through each of the front ends
End (30,32) of each connector (22,24) connected means (34,36) for connecting the optical fiber bundles (38,40) to one another, which means (34,36) in turn means (42,44) for arranging a have multi-pole fiber bundles (38,40) with a very specific grid, and by means (46) for fastening the connectors (22,24) to their front ends (30,32) which can be brought into engagement with one another in such a way that the
optical fibers of the two multi-pole fiber bundles (38,40)
visually align with each other. 2. Connection according to claim 1, characterized in that the connectors (22,24) each have a connector housing (48,50) which is connected to one of their rear ends (26,28)
up to its front end (30,32) completely penetrating opening (52,54) is provided, wherein the opening (52,54) is dimensioned and shaped such that it can accommodate a multi-pole optical waveguide. 3. A connection according to claim 2, characterized in that the connector housings (48.50) each have associated with them devices (56,58) for sealing, which are partially with
the rear ends (26,28), and partially with the front
Ends (30,32) are connected when the connectors (22,24) are fastened together. 130020/0658 4. A compound according to claim 3, characterized in that the device (56,58) for sealing a behind the front end (30) of at least one connector housing (48) arranged resilient O-ring and one with the front end (30) with each other connected housing parts (48,50) co-operating second resilient O-ring, wherein the resilient O-rings are each arranged in a circumferential groove. 5. A connection according to claim 2, characterized in that means (88, 90) are provided which are connected behind the surfaces (42, 44) to each connector housing (48, 50) in order for the multi-pole optical waveguides (38, 40) to create a stress relief. 6. A connection according to claim 5, characterized in that the stress relief devices (88, 90) comprise a potting compound connected to each of the housing parts (48, 50). 7. A connection according to claim 6, characterized in that the potting compound is arranged in each of the connector housings (48, 50) and an elastic mass (88 ', 90') near the rear ends (26, 28) of the same and a rigid resin compound ( 88 ″, 9O ¹¹ ) in front of the elastic mass (88 ', 9O'). 8. A compound according to claim 2, characterized in that the means for arranging the optical waveguides (38,40) comprise surfaces (42,44) by means of which the optical fibers of two multi-polar optical waveguides can be arranged in parallel planes. 9. A connection according to claim 8, characterized in that the surfaces (42,44) each have an alignment plate with holes (62 ^, ^{1 fe4 v} ? * ^{Sen formed} therein, receiving the optical fibers, the number of which is at least sufficient for the optical fibers a multi-pole optical waveguide, whereby through 130020/0658 the optical fiber receiving holes (62,64) in the Area (42,44) a very specific grid is defined or determined. 10. A connection according to claim 9, characterized in that the connection devices (34,36) furthermore have rear plates (94,96) which are arranged behind the alignment plates (42,44) in order to offer them a support or a hold, wherein the alignment plates (42,44) are connected to the rear plates (94,96) (or parts of the latter). 11. A connection according to claim 10, characterized in that the back plates (94, 96) each have enlarged openings (98, 100) which cover at least the holes (62, 64) receiving the optical fibers, the optical fibers of each multi-pole optical waveguide (38,40) these enlarged openings (98,100) penetrate each of the back plates (94,96) up to the corresponding alignment plates (42,44) and wherein the optical fibers are connected or connected to the alignment plates (42,44). are appropriate. 12. A connection according to claim 11, characterized in that the optical fibers are embedded in the enlarged openings (98,100) of the back plates (94,96) by means of epoxy resin (142,144), the epoxy resin (142,144) providing stress relief to the optical fibers and the optical fibers with the alignment plates (42,44) connects. 13. A compound according to claim 10, characterized in that the connection devices (42,44) means (84,86) for orientation; or for centering the two connector housings (48, 50) such that the optical fibers of two multi-pole optical waveguides are optically aligned with one another when the connector housing (48,50) are connected to one another with their front ends (30,32). 14. A compound according to claim 13, characterized in that 130020/0658 the orientation device (84, 86) at least two with the connection devices (42, 44) of one of the two connector housings (48, 50) has connected pins (84) and a corresponding number of openings (86) receiving the pins (84), which are formed in the connection devices (42, 44) of the other of the two connector housings (48, 50). 15. Connector according to claim 14, characterized in that the alignment plate (42,44) and the back plate (94,96) of one of the two connector housings (48,50) has two bores (86) receiving the pins (84), the Pins (84) are arranged in these bores (86) and the alignment plate (42, 44) and the back plate (94, 96) of the other of the two connector housings (48, 50) have a corresponding number of openings (84) receiving the pins (84). 86). 16. A connector according to claim 15, characterized in that the openings (86) receiving the pins (84) have an alignment hole (86 ') and an alignment ^{slot (86 11} ) in the alignment plate (42, 44) and in the back plate (94, 96) of the other of the two connector housings (48, 50), the alignment hole (86 ') and the alignment slot (86'') being designed so that they the pins (84) for orientation or for centering the in alignment to be arranged connector housing (48,50) can accommodate. 17. A compound according to claim 13, characterized in that the orientation or centering device has a projection (168) formed on the connection device (148) and a groove (170) which is formed on the other connection device (146) and which receives the projection (168) and that the optical fibers of the two multi-polar optical waveguides (38, 40) are optically aligned with one another when the projection (168) is arranged in the groove (170) that receives it. 18. A compound according to claim 10, characterized in that one with at least one of the two connectors (24) ver 130020/0658 Bound device (66) is provided for resilient loading of the connecting device (36) in the forward direction and that the connector housing (50) is provided with a stop (68) which is caused by the device (66) Forward movement of the connecting device (36) is limited, 19. Connection according to claim 18, characterized in that the device (66) is a spring and the stop (68) is a retaining ring, and that the connector housing (50) has a retaining ring (68) receiving groove for the retaining ring (68) outside the alignment plate 44 and a spring (66) carrying or supporting surface (72) behind the back plate (96). 20. A compound according to claim 19, characterized in that in the connector housing (50) a rigid or fixed insert (104) is provided which is secured in the housing (50) against backward movement and a circumferential groove (106) as a support surface (72) for the spring (66). 21. A connection according to claim 20, characterized in that the rigid insert (1C4) is arranged at a distance behind the back plate (96), and that the optical fibers are located in the area between the back plate (96) and the rigid insert (104) can bend freely. 22. A connection according to claim 20, characterized in that the rigid insert (104) has two slots (108) which connect the connecting means (36) to the connector housing (50) with one another in such a way that they allow relative axial movement. 23. A connection according to claim 20, characterized in that the optical fibers of each multi-pole optical waveguide (38,40) in an optical fiber optic cable (116,118) one 130020/0658 outer casing (120,122), and that the rigid insert (104) is provided with an opening (114) extending through it over its entire length, the diameter of which is at least part of its length is so large that it accommodate the outer sheath (122) of the optical fiber cable (118) can. 24. A connection according to claim 23, characterized in that the rigid insert (104) has a circumferential groove (112) running around the opening (114) for receiving an elastic sealing ring or O-ring (58) which is connected with the outer jacket (122) of the fiber optic cable (118) cooperates in such a way that they form a seal with one another. 25. A compound according to claim 18, characterized in that a spacer (124) is connected to at least one of the alignment plates (44) which cooperates with the resilient device or spring (66) in such a way that a controlled separation of the two multi-pole optical waveguide is enabled, and that the connection devices (34, 36) are arranged such that they come into contact with the spacer (124) when the connector housings (48, 50) are connected to one another. 26. A compound according to claim 25, characterized in that the spacer (124) is a flat sheet metal fastened to one of the alignment plates (44) and is provided with an opening passing through it which is at least large enough to accommodate the optical fibers Covered holes (64). 27. A connection according to claim 10, characterized in that a device (128) is provided for supporting the back plate (94), which has a support element arranged behind the back plate (94) in each of the connector parts (48, 50) and with the corresponding one Connector housing (48) is connected. 130020/0658 28. A connection according to claim 9, characterized in that the predetermined grid is defined or determined by at least one row of holes (62,64) receiving the optical fibers. 29. A connection according to claim 28, characterized in that the predetermined grid is defined by a plurality of rows and rows of holes receiving the optical fibers. 30. A compound according to claim 29, characterized in that the alignment plates (42, 44) provided with holes arranged in rows and rows of rows are made of metal. 31. A connection according to claim 1, characterized in that the connection devices (146, 148) each comprise a block having a front surface (150, 152), that the blocks (146, 148) each substantially penetrate them, from their rear end surfaces (154, 156) to their Front surfaces (150,152) have bores (158,160) running, and that the blocks (146,148) moreover each have holes (162,164) which are formed with great precision and which receive optical fibers and which are in communication with the bores (158, 160). 32. A connection according to claim 1, characterized in that the fastening device (46) has a first coupling part (74) formed on one connector (48) and a second coupling part (76) formed on the other connector (50), and that the two coupling parts (74,76) for fastening the two connector housings (48,50) can be brought into operative connection with one another. 33. A connection according to claim 32, characterized in that the fastening device (46) has a device for limiting the depth of engagement of the coupling parts (74, 76) connected to one another, and that the limiting device (80) Means of controlling or controlling the separation of the 130020/0658 having optical fibers of the two multi-pole optical waveguides (38,40). 34. Connection according to claim 32, characterized in that the coupling parts (74, 76) are formed from a coupling ring (74) provided with an internal thread and a coupling ring (76) provided with an external thread and can be brought into operative connection with one another by screwing into one another. 35. A compound according to claim 34, characterized in that the fastening device (46) has a device (80) for limiting the screw-in depth of the coupling rings (74, 76) to be screwed together, and that the device (80) has means for checking or for Control of the separation of the optical fibers of the two multi-polar optical waveguides includes. 36. A connection according to claim 1, characterized in that the optical fibers of each multi-pole optical waveguide are connected in a splice box or a splice box. 37. A method for producing a connection of optical fibers for the optical connection of two multi-pole optical waveguides, characterized by the following method steps: two connectors, each with a rear end and a front linden that can be brought into mutual engagement with one another, are created; connecting parts are made for connection to the front end of each connector part; holes for receiving optical fibers are formed in each of the connection parts according to a very specific, predetermined grid; one of the terminal parts is attached to the front end of each connector; finally, the optical fibers of a multi-polar optical waveguide are fixed in the optical fiber receiving holes in each of the connector parts. 130020/0658 38. The method according to claim 37, characterized in that the connecting parts are made of metal, and that the holes receiving the optical fibers are formed by means of Metallätzuni *. 130020/0658