DE2451883A1 - ACTIVE BRANCH DEVICES FOR A GLASS FIBER DISTRIBUTION SYSTEM - Google Patents

Description

Active tapping device for one
Fiber optic distribution system

The invention relates to abs / exgvorricüitungen with several incoming optical signals leading waveguides, or several of these. Signals leading Y / ellenleitem and with coupling devices.

In the older registration P 2 415 046.7 a simple interception device for a fiber optic distribution system suggested, in the event of multiple marriages, emanating from several transmitters Optical fibers these are connected to the receiver via several distributors. There are passive components as distributors used, which the recipients cannot influence »

Erfindimg object of it is to provide a _s active Abaweigvorrichtungen -Grlasfaserverteilsystein over which each receiver can be fed in the leading to this waveguide a desired program.

These. According to the invention, the object is achieved by one optoelectronic each Converter for each incoming optical waveguide, one amplifier at the output of each converter and at least solved a coupling device, whose input with the outputs of the amplifier and their outputs via electro-optical ^ Converters are connected to the outgoing optical waveguides, which lead to multiple receivers.

VPA.9 / H 0/4059 Yffi / Hth

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609819/0629

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To create a distribution network, it is advantageous each electro-optical converter with several outgoing waveguides In a further expansion stage, such a network can be created by simply exchanging components be changed to a switched network.

For this purpose, the branching devices are both to the receiving leading optical channels as or also electrical return lines connected by the receivers. In this case, in particular, each electro-optical converter has only one further Waveguide connected. In this way a communication network arises, in which either a narrowband Return channel for program selection or a broadband one Return channel for broadband communication is realized, through which the recipient also feeds special progx * amme can be.

One advantage of the above-mentioned active branching devices is that when converting an existing broadband distribution system to a communication network at least in the lowest network level parts of the broadband distribution network can also be used or re-used, thus keeping investments lower when introducing communication services. Is a Return channel, e.g. a telephone channel, is available for an intended exchange, this can advantageously be used at Transition from a pure distribution network to a switched network may be used.

A predetermined program is assigned to a specific receiver by controlling the respective receiver connected to it Light transmitter fed.

For the transmission of programs by the receivers, these are connected to a circuit of the coupling device, which e.g. is part of the electronic amplifier.

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VPA 9/710/4059 * -3-

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This is advantageously integrated together with the subsequent light transmitters and with the coupling device Technology built up.

The light transmitters are connected to the optical waveguides in particular connected by connectors which are constructed so that crosstalk between adjacent optical Channels is avoided.

The invention is based on the following Aus £, ührungsbei ~ games in the description of the figures. explained in more detail.

Figure 1 shows a junction device according to the invention, Figures 2 and 3 each a connection structure of the light transmitter with connecting fiber optics for a distribution network or for a switched network.

In FIG. 1, a branching device 1 is shown schematically, to which optical waveguides 2 are led. The branching device contains η optoelectronic transducers 3> just as many electronic amplifiers 4 connected to it and coupling devices 5 connected thereto, shown schematically and connected to electro-optical converters 6. From each of these transducers, ρ glass fibers lead to ρ. Recipients E ₁ , Eg) ο. E.

In a distribution network, each coupling device 5 is only through one of the electrical lines 12 shown ρ is connected to a subsequent electro-optical converter 6. The administration 14 for the switching signals are not in this case necessary. In this case, only one program is forwarded to all receivers E by each electro-optical converter 6.

In a switched network, however, each coupling device is 5 connected by the drawn ρ electrical lines 12 to each subsequent electro-optical converter 6. aside from that Each receiver is connected to the coupling devices 5 via the lines 14 for the switching signals.

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Everyone electro-optical «? Converter 6 has at its output p Luminescence diodes each with a plug connection for the further fiber optics on »

Via the waveguide 2, a television program, for example, each supplied onto the group consisting of photodiodes opto-electric converter 3, _r wherein the light output into electrical currents or voltages uragewandlet v / ground. These are amplified in the electronic amplifiers according to known measures to such an extent that the signal energy is sufficient to supply ρ receiver with the program supplied in a channel 2.

Any receiver that is connected to the switching station via the optical fiber ρ now wants the Connected to grounding the transmitter of any program, he can switch this appropriately by himself via the return line ρ. The receiver, which is connected to the branching device via the optical fiber ρ, can also be used, for example separate programs on his line that cannot reach other recipients.

The electronic amplifiers 4 and the coupling device 5 or else the entire branching device is constructed using a known, integrated technology.

In relation to FIG. 2, there is an exemplary embodiment for a connection an electro-optical converter 6 with several outgoing glass fibers in a distribution network. on A luminescent diode 9 kit with a large emission surface is applied to a substrate 11 using integrated technology. The light-emitting diode is activated by an electrical line 12 through the substrate 11. Multiple fibers 8 are connected to the luminescent diode by a multiple plug connection 15.

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To create a switched network, according to FIG. 3 each fiber optic 8 leading to the receivers wit one each Luminescent diode 13 via the Vielfexh plug connection 10 tied together. The connector should Lurnineszeiizdioden and Coupling pasers with little loss and a crosstalk of the optical · see signals between adjacent optical fibers 8 prevent.

The advantage is that when converting a distribution network Mediated operation only the light emitting diode !! exchanged v / earth need (many small light emitting diodes !! on one common substrate instead of a large-area light emitting diode), but not the glass fibers.

The Lujninessenzdioöen 13 are also integrated Lechiiik arranged on a substrate 11 and are on the electrical supply lines 12 controlled.

3 figures

3 claims

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Claims (3)

Pate ntansp rü before Junction devices with several incoming optical Signals .-. Leading waveguides and several of these Signals leading waveguides and with coupling devices, marked. by one optoelectronic) converter for each incoming optical waveguide, one amplifier each at the output j§of the converter and at least one coupling device> their inputs with the outputs of the amplifier and their outputs via electro-optical converters with outgoing optical waveguides are connected, which lead to multiple receivers. 2. Abzweigvorriehtamgen for a distribution network according to claim 1, characterized in that each electro-optical Converter connected to multiple outgoing waveguides. 3. Junction devices for a mediated Hetz according to claim 1, characterized in that each electro-optical ^ converter with an outgoing Waveguide is connected. VPA 9/710/4059 6098 19/06 29
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