WO2009103174A1

WO2009103174A1 - Plug connection arrangement for optical waveguide

Info

Publication number: WO2009103174A1
Application number: PCT/CH2009/000060
Authority: WO
Inventors: Alois Bissig; Erich Zurfluh
Original assignee: Alplight
Priority date: 2008-02-20
Filing date: 2009-02-12
Publication date: 2009-08-27

Abstract

The invention relates to a plug connection arrangement for optical waveguides (13), comprising an input part (11) for incoming light, an output part (12) for outgoing light, and a connecting part (15), wherein the input part (11) and the output part (12) can be connected by way of the connecting part (15), a pivotally supported protective flap (16) is provided, which is disposed such that it prevents light from exiting the plug connection arrangement (10) when the output part (12) has been removed, and a status sensor (17) is provided, which detects a proper connection of the output part (12) to the input part (11).

Description

Connector assembly for optical fibers

Reference to related applications

This application claims the benefit of Swiss Patent Application 0241/08, filed on Feb. 20, 2008, the entire disclosure of which is hereby incorporated by reference.

background

The invention relates to a

Plug connection arrangement for optical waveguides according to the preamble of claim 1. The optical waveguides can also be referred to as optical fibers or optical fiber cables. The optical waveguides may be, for example, quartz glass fibers, sapphire glass fibers, other types of glass fibers, so-called HardClad silica fibers (HCS), polymer fibers (POF), waveguides and / or so-called photonic crystal fibers (PCF) a combination of optical fibers with one or more lenses is conceivable.

The inventive

Connector assembly is not limited to use with optical fibers, but can also be used in irradiation arrangements in which active and / or passive optical components of coherent and / or non-coherent type such as laser diodes, light emitting diodes (LEDs), halogen lamps and the like associated with an input and / or an output of the connector assembly. Furthermore, the inventive

Connector assembly suitable for irradiation arrangements in which detectors or beam modifying Components such as photodiodes, optical isolators, lens assemblies, prisms, non-linear optical components or components and the like are associated with the input and / or the output of the connector assembly.

The erf indungsgemässe

A connector assembly may be used, for example, in the medical device arts, particularly for exposure purposes, but is not limited to applications in the field.

State of the art

Irradiation arrangements or sources with a laser as the light source are used in medical technology in many ways. Such irradiation arrangements are used, for example, in photodynamic therapy (PDT), photodynamic disinfection (PDD) and in low-level light therapy (LLLT). Furthermore, such

Irradiation arrangements are also used for cutting tissue, drilling in or on teeth, for endodontic treatment, in veterinary medicine, for curing dental fillings, for tooth whitening (so-called Teeth Whitening) and the like. For certain of the enumerated applications, optical waveguides and connector assemblies or connectors for these optical waveguides are used in connection with the irradiation arrangement. FIG. 1 shows a known SMA plug connection arrangement 1 (sub-miniature A plug connection arrangement) with an SMA plug connector as the input part 2 and an SMA plug connector as the output part 3, such as two optical waveguides 4, one each the input part 2 and one connected to the output part 3, via a coupling 5 designed as a connecting part connects to each other (Figure Ia). In FIG. 1b shows the output part 3 and the optical waveguide 4 connected to the output part 3, and it can be seen how the light beam 6 can pass unhindered out of the optical waveguide 4 connected to the input part 2 and fall on a human eye 7 and damage it. The radiation exit can therefore not be prevented when the SMA plug connection arrangement 1 is open. In Figure 2, the input parts designed as connectors are further known

Connector assemblies, which can also act as output parts shown, which are basically suitable for optical fibers, but in which, when the connector is open, the radiation leakage can take place unhindered, i. the radiation emission can be made unprotected in this case. FIG. 2a shows a ST connector (straight tip connector), FIG. 2b shows a DIN connector (German industrial standard connector), FIG. 2c shows an SC connector (subscriber connector / standard connector connector) FIG. 2d shows an FC connector (ferrule connector connector) and FIG. 2e shows an SMA connector as in FIG.

Known irradiation arrangements with light outputs in the range of more than 1 milliwatt to over 5 watts, with the known

Connector assemblies are used, are often designed so that the radiation can escape unhindered and thus pose a danger to the user and the patient. such

Laser irradiation arrangements are therefore typically assigned according to laser classifications IEC 60825-1 and ANSI Z.136.1 of laser class 3B or 4, respectively, and correspondingly marked. The laser class 3B are associated with laser irradiation arrangements whose accessible laser radiation is dangerous to the eye and in special cases also to the skin is, with diffuse scattered light is generally harmless. Laser class 4 is assigned to laser irradiation arrangements whose accessible laser radiation is very dangerous to the eye and dangerous to the skin, whereby diffuse scattered light can be dangerous and the laser radiation can cause fire or explosion (compare http://de.wikipedia.org / wiki / laser).

For irradiation arrangements of these laser classes, protective devices must be provided according to the abovementioned laser classifications, such as a security lock, a security "interlock" plug, a "laser on" display, a "laser ready" display, a redundant timer electronics , an "emergency stop" button / switch, etc. Furthermore, the user and the patient must wear laser goggles, which can sometimes interfere with the field of vision, whereby the cost of the laser goggles increases with the danger of the irradiation arrangement and thus with the laser class. Known irradiation arrangements, in which the known connector assemblies are used, are therefore considered to be relatively dangerous for the user. Due to the additionally required protective measures, they are also relatively expensive. From the patent application US 2003/0147597 Al is an adapter or a fiber optic

Connection assembly with a light-blocking damper known that prevents light from exiting the optical fiber when the connection assembly is open, i. if no mating connector is inserted in the connection arrangement. The protective flap is pivotally mounted and can be pushed out of the light path by the mating connector.

In the patent US 5,675,682 A a connector assembly with at least two juxtaposed optical connectors is described (so-called duplex connector). It is a swiveling, protective flap provided for closing the open sides of the plug, which can be opened manually.

US Pat. No. 6,572,274 B1 discloses a safety flap module which fits onto a standard connector for optical waveguides and which interrupts a light path emanating from the connector for safety reasons. The module includes a cap-like structure and a protective shield on which a rectangular flap is mounted swingably at right angles.

However, by providing a protective flap, however, an insufficient plug contact, that is to say, a plug contact in which the radiation is not completely conducted from one optical waveguide into the other optical waveguide but at least partially past the other optical waveguide, can not be determined. The use of contaminated and / or insufficiently terminated or processed plugs and / or optical waveguides, which represents a potential risk of overheating, can not be recognized thereby. Thus, despite the protective flap, there may be an impairment of the radiation to be transported or even damage or destruction of the optical waveguide. In the case of overheating of an optical waveguide and / or the

Connector assembly, for example, the incoming light transporting and / or the outgoing light transporting (each viewed from the connector assembly) damaged or even destroyed, which would result in that only an insufficient radiation power is passed. When using the connector assembly together with optical fibers in photodynamic therapy (PDT) or in photodynamic disinfection (PDD), such a case would lead to an inefficient treatment, which in advance in the use of the known Connector assemblies would not readily be recognized and avoided.

Presentation of the invention

The present invention has for its object to provide a connector assembly for optical fibers, the application of which in connection with the transport of radiation / light is safer than the application known

Connector assemblies is. In particular, the combined use of the inventive connector assembly with a laser irradiation arrangement to allow a cost-effective reduction of the laser class 3B or 4 on the laser class 2M or an underlying, less dangerous laser class. In laser class 2M, the accessible laser radiation is only in the visible range (400 nanometers to 700 nanometers). It is also harmless to the eye with short-term radiation duration (up to 0.25 seconds) as long as no optical instruments such as magnifying glasses or binoculars are used (see http://de.wikipedia.org/wiki/Laser).

The object is achieved by a connector assembly with the features of claim 1.

The inventive

A connector assembly has an incoming light / incoming radiation input, an outgoing light / outgoing radiation output, and a connector, the input and output members being connectable via the connector. Of course, the input part can also be used for outgoing light and the output part for incoming light. In each case at least one optical waveguide can be coupled into the input part and into the output part. The Input part and the output part are preferably designed as a plug, wherein the input part can be designed as a so-called male plug and the output part as a female plug (or vice versa). The connector assembly has a pivotally mounted flap, which is arranged such that it prevents the exit of light or radiation from the connector assembly in remote from the connecting part output part. According to the invention, a condition sensor is provided which detects a proper connection of the output part and the input part.

The protective flap provides "passive" protection against light leaking out of the connector assembly, such as laser radiation, in the event that the connector assembly is open, ie, the output member is not attached The condition sensor detects a correct connection of the input member to the output member through the connector ie a correct plug connection.

According to a preferred embodiment, the connector assembly according to the invention comprises a temperature sensor which is arranged such that an impermissible temperature increase in the input part and / or in the output part can be detected by it. Of the

Temperature sensor is preferably arranged in the vicinity of both the input part and the output part, when the output part is connected to the input part. Inadmissible is considered a temperature increase, which could lead to damage or destruction of the input part and / or the output part and / or an optical waveguide coupled into the input part or the output part.

In this way it can be ensured that only then radiation through the inventive

Connector assembly is directed, if none to an inadmissible temperature increase and finally to a destruction leading conditions exist, such as contamination of an optical waveguide, the input part or the output part. The inventive

Connector assembly advantageously provides effective, simple, and cost effective protection against damage to a user caused by light leaking accidentally out of the connector assembly (eg, in an open connector assembly). As unintentionally emerging light such light is defined, which emerges when the connector assembly is opened.

Brief description of the drawings

Further advantageous embodiments of

Invention will become apparent from the dependent claims and the embodiments illustrated below with reference to the drawings. Show it:

Figure 1 is a schematic representation of a known SMA connector assembly in side view in the closed state (Figure Ia) and in the open state (Figure Ib), Figure 2 plug known

Connector assemblies in side view, namely an ST connector (Figure 2a), a DIN connector (Figure 2b), an SC connector (Figure 2c), a FC connector (Figure 2d) and an SMA connector (Figure 2e), Figure 3 is a schematic

Longitudinal view of a connector assembly according to the invention in the open state without output part (Figure 3a), in the open state with output part (Figure 3b) and in the closed state (Figure 3c),

Figure 4 is a schematic longitudinal sectional view of the inventive Connector assembly according to Figure 3a with emerging radiation,

Figure 5 is a schematic

Longitudinal view of the inventive connector assembly according to Figure 3 with

Contamination in the open state (FIG. 5a) and in the closed state (FIG. 5b),

Figure 6 is a schematic

Longitudinal view of a connector assembly according to the invention in the open state with a trained as a guide sleeve connecting part, which is assigned in Figure 6a the output part and in Figure 6b the input part,

FIG. 7 schematically shows a cross section (FIG. 7 a) and a longitudinal section (FIG. 7 b) through a light waveguide,

Figure 8 is a schematic

Longitudinal sectional view of an inventive connector assembly in the closed state with the optical waveguide shown in Figure 7 and

FIG. 9 shows the illustration according to FIG. 8 with a completely shown optical waveguide.

In the figures, like

Reference structurally or functionally equal or equivalent components.

Figures 1 and 2 are in the

Described description introduction and it is referred to the local text passages.

Way (s) for carrying out the invention

FIG. 3 shows an inventive device

Plug connection arrangement 10 with an input part 11 for an incoming optical waveguide 13 and an output part 12 for an outgoing optical waveguide 13. The input part 11 and the output part 12 are preferably in each case as a fiber guide, in particular as Ferrule with a guide for one or more optical fibers, executed.

The input part 11 and the output part 12 are preferably brought together in a housing 14, wherein a connecting part 15 for connecting the

Input part 11 is provided with the output part 12. By way of example, the connecting part 15 in FIG. 3 is mounted on the output part 12. On the inside of the housing 14, a protective flap 16 is provided near the output part-side opening of the housing 14, which, in particular resilient, is pivotally mounted.

In the open state of

Connector assembly 10, the output member 12 is not connected to the input part 11 and the protective flap is mounted so that it is perpendicular to the longitudinal direction and the radiation path or is positioned, extending in the transverse direction to the radiation path and thus a possible radiation from the output part side Housing opening prevents (Figure 3a). Now, if the output member 12 is inserted into the housing 14 for closing the connector assembly 10 and moved to the input part 11 (straight arrow in the longitudinal direction in Figure 3b), it moves (in the example shown on the connecting member 15 mounted thereon), the protective flap 16 out of the radiation path. The protective flap 16 is pivoted upward (curved arrow in Figure 3b) and finally comes on the proper connection of the input part 11 with the output part 12 on the

Connection member 15 for resting (Figure 3c), so that they can no longer obstruct the radiation path. The protective flap 16 is then substantially parallel to the radiation path. It is also conceivable embodiment in which the protective flap 16 comes to rest on the output part 12 and / or the input part 11. FIG. 4 shows the open, unplugged connector arrangement from which radiation 6 occurs. Without the protective flap 16, the radiation would strike the eye 7 and could injure it. However, the dimensions (or the extent) of the protective flap 16 in the transverse direction to the radiation are selected to be correspondingly large, so that the radiation can not also partially pass the protective flap 16 on the eye 7. Preferably, the protective flap 16 has a rectangular area extending perpendicular to the longitudinal direction.

A state sensor 17 is provided, which detects a proper connection of the input part 11 to the output part 12. That is, the state sensor 17 detects when a plug connection between the input part 11 and the output part 12 has come about as intended. The condition sensor is preferably an electrical sensor, for example a touch switch and / or a proximity switch. The state sensor 17 can be designed, for example, as a capacitive, inductive and / or optical sensor. In Figure 3, the state sensor 17 is exemplified as a switch with a unspecified button, which is actuated when attaching the output part 12 (here indirectly via the connecting part 15).

The state sensor 17 or its

Output / outputs are connected to an evaluation unit (not shown), in particular an evaluation electronics. If the evaluation unit receives an output signal from the state sensor 17, it interprets this to mean that a proper plug connection has been established and outputs a switch-on signal for a light source, for example a laser (not shown), which then injects radiation into the plug-in arrangement 10 Fiber optic cable 13 feeds. In this way it is ensured that only radiation passes through the connector assembly 10, if a proper plug connection is given. Thus, in addition to the protective flap 16, there is further protection against unintentionally emerging radiation.

The connector assembly 10 further preferably has a temperature sensor 18, by means of which an impermissible temperature rise, which leads to damage or at least partial destruction of the

Connector assembly 10 or one of the optical waveguide 13 can lead, can be detected. The temperature sensor 18 is preferably in the closed state of the connector assembly 10 both near the incoming and near the outgoing

Optical waveguide 13 and arranged both in the vicinity of the input part 11 and in the vicinity of the output part 12. In the open state, the temperature sensor 18 is preferably arranged in the vicinity of the incoming optical waveguide 13 or in the vicinity of the input part 11, namely near the point at which it comes to a coupling between the two optical waveguides 13 in the closed state. Under the incoming or incoming optical waveguide 13, the optical waveguide is understood, which is connected to the input part 11 and is guided via the radiation to the connector assembly 10. Under the outgoing optical waveguide 13, the optical waveguide 13 is understood, which is connected to the output part 12 and is discharged via the radiation from the connector assembly 10.

The temperature sensor 18 preferably comprises a heat-dependent resistor, a bimetallic strip and / or the like and may be designed as a so-called thermal switch. The output or the outputs of the temperature sensor 18 are connected to the evaluation unit (not shown). The Evaluation unit processes the output signal of the temperature sensor 18 and, with a corresponding output signal, outputs a switch-off signal to the light source, for example a laser (not shown), which then feeds no further radiation into the optical waveguide 13 entering into the connector assembly 10.

FIG. 5 illustrates the plug connection arrangement 10 shown in FIG. 3, in which an exemplary impurity 19 is located on the end face of the optical waveguide 13 coupled into the output part 12. In the closed state, the impurity 19 is then between the two optical waveguides 13. The impurity 19 leads due to insufficiently forwarded optical radiation to a temperature increase, which is detected by the temperature sensor 18, forwarded to the evaluation and processed by the latter, wherein the evaluation unit at corresponding increase in temperature, the light source as described above off. For example, an increase in temperature may also be due to the use of inadequately processed (e.g., inadequately polished) and / or defective optical fibers.

In this way, it is ensured that the radiation arriving in the connector assembly 10 is transmitted with low loss into the outgoing optical waveguide 13, since otherwise the light source is switched off. This is particularly relevant for applications in which high radiation powers (in particular radiation powers of more than 50

Milliwatts) are used. Furthermore, the detection of a temperature rise is of particular importance when sensitive optical waveguides such as polymer fibers (also called plastic fibers) are used. Polymer fibers are usually very susceptible to contamination and susceptible to damage or destruction as the material is they are very soft. Polymer fibers are used in many disposable medical applications.

The inventive

Connector assembly 10 can be used both as a single (simplex) and as a multiple (duplex)

) Connector assembly may be formed. In the duplex embodiment, the input part 11 and / or the output part 12 can accommodate more than one optical waveguide 13, so that there are several optical paths that can be connected to each other via the connector assembly 10. For the guidance of the respective optical waveguide 13 is preferably depending

Optical waveguide 13 provided a ferrule. Furthermore, in the case of the duplex embodiment, a protective flap 16 may be provided for each or all or part of the optical waveguide 13 coupled to the input part 11, in each case a protective flap 16, depending on the optical waveguide 13 coupled to the input part 11. The same applies to the temperature sensor 18, which may likewise be provided for each optical waveguide 13, for a part of the optical waveguides 13 or for all optical waveguides 13.

The connecting part 15 is preferably a guide sleeve, which is either on one or more as shown in Figure 6a

Optical waveguides 13 of the output part 12 or as shown in Figure 6b can be attached to one or more optical waveguides 13 of the input part 11, wherein the attachment is preferably carried out indirectly via the ferrules, in which the optical waveguides 13 are guided. The formed as a guide sleeve connecting part 15 protrudes in the attached state on the front side of the input or output part 11, 12 or of the one or more optical waveguides 13 addition to the other part (output or input part 12, 11) or to receive one or more optical fibers 13. If the connecting part 15 is attached to the output part 12 as shown in FIG. 6 a, then a state sensor 17 which is designed, for example, as a proximity switch or as a touch switch is arranged and aligned such that it passes through the

Connecting part 15, which also protrudes in the transverse direction over the output part 12, can be actuated. The to be actuated by the connecting part 15, unspecified button of the state sensor 17 is for this purpose on a front side of the state sensor 17, which is parallel to the transverse direction.

If the connecting part 15 is arranged on the input part 11, as shown in FIG. 6b, then a state sensor 17 designed, for example, as a proximity switch or as a touch switch is arranged and aligned in such a way that it can be actuated by the output part 12, that is to say the pushbutton to be actuated is located again at the end face of the state sensor 17, but here parallel to the longitudinal direction and radially equidistant from the unspecified longitudinal axis of the connector assembly 10 as the inner periphery of the connecting part 15. The state sensor 17 is preferably Iichtstromabwärts of the connecting part 15 in the housing 14 arranged.

The trained as a guide sleeve

Connecting part 15 is preferably mounted non-positively or floating. It may be a metal or a ceramic sleeve, which may be slotted. Preferably, a guide sleeve made of a material with a low thermal

Heat transfer resistance used, especially for applications with high optical performance. Therefore, a guide sleeve made of metal is preferably used as the connecting part 15.

Typical optical fibers 13, such as polymer optical fibers (POF), include a core 20, a jacket 21 surrounding the core 20, and a buffer 22 surrounding the jacket (see Figure 7a). The buffer 22 is also referred to as a buffer according to the corresponding English expression. As a material for the buffer 22, material is often used which has a lower thermal resistance (and thus a lower glass transition temperature) than the core and cladding materials.

In the case of the polymer optical fiber mentioned by way of example, with high optical powers it may happen that the power density is so high that the material of the buffer 22 and / or even the material of the core 20 and / or the jacket 21 are thermally destroyed or damaged If such optical waveguides 13 are to be used at high optical powers, it is therefore advisable to use the so-called cladding modes, which are defined as the light beams which propagate in the cladding 21 and which therefore penetrate the cladding Buffer 22 can go over when coupling the incoming

Optical fiber 13 to be coupled into the outgoing optical waveguide 13, since they usually lead to a thermal heating of those materials of the optical waveguide 13, which participate in the transmission of the optical power.

In order to prevent damage to the buffers 22 of the optical waveguide 13 to be coupled by the connector assembly 10, the buffer 22 is thus longitudinally extended from the end face, preferably by a length of, for example, a length of 2 at the ends of the optical fibers 13 to be coupled to 5 mm, away (see Figure 7b, reference numeral 23). In this way, the possibility of overheating can be reduced at the coupling point of the incoming optical waveguide 13 and the outgoing optical waveguide 13. A distance from 2 to 5 mm, for example, is sufficient for optical plastic fibers made by Toray.

FIG. 8 shows a plug connection arrangement 10 according to the invention with a simplified input, output and connection part 11, 12, 15 in the closed state, wherein an optical waveguide 13 is introduced into the input part 11 and into the output part 12. At the ends of the optical waveguide 13 to be coupled, the buffer 22 at the points 23 is removed by a certain length over the entire circumference in order to avoid overheating.

Although at the end remote from the connector assembly 10 end 24 of the optical waveguide 13, usually hardly occur on jacket modes. However, it may instead come at this end 24 to a so-called Fresnel reflection. The end 24 of the optical waveguide 13 forms the reflection point. Fresnel reflections usually occur at transitions from / to different refractive index materials, such as a transition from PMMA (polymethyl methacrylate) to air or from glass to air. In the present case, an optical waveguide 13 made of PMMA is preferably used. However, it is also possible to use an optical waveguide 13 made of glass. in the

As part of a Fresnel reflection, a part of the power is reflected at the reflection parts and therefore heating of the end 24 of the optical waveguide 13 can occur. For example, in a PMMA optical waveguide, the power reflected in this way may be more than 5% of the total transmitted optical power. If, for example, 2 watts of optical power are transmitted, then at least 100 milliwatts of this power will be reflected. To the unwanted effects of a

Fresnel reflection is preferably at the removed from the connector assembly 10 or distant ends 24 of the optical waveguide 13 each of the buffer 22 in the longitudinal direction, starting from the end face by a certain length (reference numeral 25), for example, by a length of 2 to 5 mm away. This is shown by way of example in FIG. 9 for one of the optical waveguides 13.

To control the propagation of light at the free end 24 of an optical waveguide 13, radially optical elements / components such as spheres, rods or the like can also be attached or provided at the end 24 over the length 25 of the removed buffer 22.

While preferred embodiments of the invention are described in the present application, it is to be understood that the invention is not limited thereto and may be embodied otherwise within the scope of the following claims.

Claims

claims

1. Connector assembly for

Optical waveguide (13) having an input part (11) for incoming light, with an output part (12) for outgoing light and a connecting part (15), wherein the input part (11) and the output part (12) via the connecting part (15) are connectable and a pivotally mounted protective flap (16) is provided, which is arranged so that it prevents the exit of light from the connector assembly (10) with the output part (12) removed, characterized in that a state sensor (17) is provided, which proper connection of the output part (12) with the input part (11) recognizes.

2. Plug connection arrangement according to claim 1, characterized in that it is the state sensor (17) is an electrical sensor, in particular a touch switch, a proximity switch and / or a capacitive, inductive and / or optical sensor.

3. Connector arrangement according to claim 1 or 2, characterized in that a temperature sensor

(18) is provided, which is arranged such that an impermissible temperature increase in the input part (11) and / or in the output part (12) and / or in one of the optical waveguide (13) to be coupled can be seen through it.

4. Plug connection arrangement according to claim 3, characterized in that the temperature sensor (18) comprises a heat-dependent resistor and / or a bimetallic strip.

5. Plug connection arrangement according to one of the preceding claims, that an evaluation unit is provided, through which the output signal of the state sensor (17) and / or the output signal of the temperature sensor (18) can be evaluated, wherein the

Evaluation unit is designed such that it outputs an activation signal for a light source at an output signal of the state sensor (17) and / or that it emits a switch-off signal for the light source at a corresponding output signal of the temperature sensor (18).

6. Plug connection arrangement according to one of the preceding claims, characterized in that with the input part (11) and the output part (12) in each case one or more optical waveguides (13) can be accommodated, wherein for the guidance of the one or more optical waveguides (13) both Ferrules are provided in the input part (11) as well as in the output part (12).

7. Connector assembly according to one of

Claims 1 to 5, characterized in that the connecting part (15) is designed as a guide sleeve which is attachable to one or more optical waveguides (13) of the input part (11) or on one or more optical waveguides (13) of the output part (12) and in the attached state over this (11; 12) protrudes to receive the one or more optical waveguides (13) of the output part (12) or of the input part (11).

8. Plug connection arrangement according to claim 7, characterized in that the connecting part (15) frictionally or floatingly mounted on the one or more optical waveguides (13) of the input part (11) or the output part (12) is attachable.

9. Plug connection arrangement according to one of the preceding claims, characterized in that the connecting part (15) is made of metal.

10. Plug connection arrangement according to one of the preceding claims, with one or more in the input part (11) and the output part (12) arranged optical waveguides (13), wherein the one or more optical waveguides (13) has a core (20), a core ( 20) surrounding the envelope (21) and a jacket (21) surrounding the buffer (22), characterized in that at the ends to be coupled of the one or more optical waveguides (13) of the buffer (22) in the longitudinal direction by a certain length, in particular by 2 to 5 mm, is removed.

11. Connector assembly according to claim 10, characterized in that at the radiation connection arrangement far end (24) of the one or more optical waveguides (13) of the buffer (22) in the longitudinal direction by a certain length (25), in particular by 2 to 5 mm, is removed.