WO2014041009A1

WO2014041009A1 - Method for creating a fiber-optic connection, use of a splicing device, and method for creating a connection protocol

Info

Publication number: WO2014041009A1
Application number: PCT/EP2013/068771
Authority: WO
Inventors: Victor Coggi; Francois Caloz; Alfio CERINI
Original assignee: Diamond Sa
Priority date: 2012-09-14
Filing date: 2013-09-11
Publication date: 2014-03-20
Also published as: CH706936B1; DE112013004499A5; CH706936A1

Abstract

The invention relates to a method for creating a fiber-optic connection between a first optical waveguide (21) and a second optical waveguide (22) assigned to the first optical waveguide, wherein the first and second optical waveguides (21, 22) are each connected or a connection is established to a coding that can be read out via the corresponding optical waveguide (21, 22), in particular in the form of a fiber Bragg grating (FBG1, FBG2), comprising the following steps: reading out the coding of the first optical waveguide (21), reading out the coding of the second optical waveguide (22), checking the association of the two read-out codings, connecting the two optical waveguides (21, 22) to each other.

Description

METHOD FOR CREATING A FIBER OPTIC CONNECTION, USE

A splicer and method for creating a connection protocol

The present invention relates to a method of creating a fiber optic connection and a connection protocol, the use of a splitter in such a method, and the use of a Spieissgeräts for temporary

Connecting an optical fiber to a measuring device.

In the course of the increased use of optical

Fiber optic cables for direct cabling of private households is commonly referred to as fiber-to-the-home (FTTH). In such FTTH applications, however, the need arises that the operator of the fiber-optic network wants to specifically address the individual private connection so as to enable or disconnect a single connection as required from the data network.

For example, WO 96/31022 A1 describes an optical

Fiber network between a service provider and a

End user. The individual end users and also the nodes are designed with a reflector, which a

created individual reflection pattern. The service provider can thus connect to each individual end user

check and make sure this connection is working properly. If necessary, disruptions or network disruptions can be easily located. It is disadvantageous that in the event of an interruption in the network, a multiplicity of end users are affected by such an interruption. If a single user is to be disconnected from the network, this separation must necessarily take place in the last node, where a fiber optic cable separates into several individual lines. The service provider must therefore have access to the road distributor or house connection box. It is also known that a service provider is a direct

Can provide connection to an end user. For example, the central office of a service provider has a main distributor, which has a fiber bundle with a plurality of individual glass fibers with the individual

Road distributors and further connected via a service line box directly to a telecommunications outlet of the end user. The benefits of having such a direct connection between the service provider and the end user are that one fault only affects a single one

End user affects. In addition, the service provider can connect the individual end user to the network directly in his main distributor or disconnect it if necessary. Access to the road distributor or house connection box for maneuvering connections is no longer necessary.

However, establishing and managing such individual connections is time-consuming, since it is necessary to keep a precise log of which connection leads to which end user. In case of mechanical damage of the connection, for example when a trunk cable or a distribution cable is cut with one or more fiber bundles during excavation work, it is difficult to restore the connections between the individual fibers correctly.

It is an object of the invention to create such

To be able to perform individual connection correctly and simply, in particular an address or a code of the

To connect the end user with the correct connection of the main distributor of the service provider and to create a connection protocol as simple as possible. This task is carried out by the independent

Claims defined method solved. Further

Embodiments emerge from the dependent ones

Claims.

An inventive method for creating a

fiber optic connection between a first

Optical waveguide and a second associated therewith

Optical waveguide, in particular for creating a

continuous fiber optic connection between a central office of a service provider and an optical

Telecommunications socket of an end user in a building comprises the steps:

- Reading a first coding of the first

Optical waveguide,

- Reading a second encoding of the second

Optical waveguide,

Checking the assignment of the two read codes,

- Connecting the first optical waveguide with the second

Optical fiber .

In this case, the first optical waveguide is connected to a first coding which can be read out via the first optical waveguide or can be connected to such an encoding. Also, the second optical fiber is one with the second

Optical waveguide readable second coding connected or can be connected to this. An exemplary coding is a fiber Bragg grating, which may be located directly in an end region of the fibers. It is also conceivable that the fiber Bragg grating in a connector of the optical

Telecommunication box is integrated. Not just a single fiber Bragg grating becomes a fiber Bragg grating but also a fiber Bragg grating array, so a combination of several fiber Bragg gratings, which

for example, are written close to each other in an optical waveguide. As an alternative to a fiber Bragg grating, a thin film filter or a reflection coating on a fiber end face or a combination of optical fibers may also be used

Components such as prisms, lenses, etc. are used for coding. By doing that, before joining the two

Fiber optic each the assignment of the two read codes is checked, it can be ensured that in each situation only two mutually associated optical waveguides are connected. This not only allows for the first time creating the fiber optic connection but also at

Maintenance after a fiber break the correct

Allocation between the central office of the service provider and the telecommunications socket of the end user. The connection of the two optical waveguides can be produced for example by means of a splice, mechanically or thermally, or else by a conventional plug connection.

For reading the coding of the first and / or the second

Optical waveguide can be connected in each case a measuring means to the first optical waveguide and / or to the second optical waveguide. In this case, the measuring means the

Characteristic of the encoding associated with the first optical waveguide and / or the second optical waveguide via a part of the measuring means reflected by the encoding

read out emitted signal. It goes without saying that the order of reading out the codings of the two optical waveguides has no influence on the method. It is also conceivable that with a suitable measuring means the

Coding of the first and the second optical waveguide

is read out at the same time. Accordingly, one would be synonymous simultaneous connection between the measuring equipment and the two optical fibers necessary. Due to the fact that the coding of the

Fiber optic cable can be read via the optical fiber, it is possible that the coding at one end of the

Fiber optic cable is connected to which the

Service provider or an installer has no access.

Accordingly, however, the coding is at any point in the

Fiber optic readable, especially at a break in the fiber optic connection.

The measuring means can by means of a fiber optic stub at the first optical waveguide and / or at the second

Fiber optic cables are connected. The use of a fiber optic stub allows one hand, that the

Measuring device is equipped with a standard standardized connector interface, for example, to which a fiber optic stub, for example in the form of a pigtail, is connected to the measuring means. If the fiber optic stub is worn or damaged, it may

Fiber optic stub to be replaced easily and inexpensively, without the measuring device must be brought to a repair shop for maintenance purposes. The use of a fiber optic stub is also advantageous because

for example, by connecting the

Optical fiber stub or the measuring means can be worn and / or damaged to an optical waveguide of the optical fiber stub connected to a code to be read. In particular, if a connection in the form of a thermal splice is created for the reading out of the coding, a part of the

Fiber optic stubs are cut off. Once the length of the fiber optic stub is no longer for another Connecting to an optical waveguide is suitable, the optical fiber stub can be replaced.

For connecting the measuring device to the first

Optical waveguide and / or to the second optical waveguide, an alignment of a Spieissgeräts can be used. Usually known Spieissgeräte are equipped with an alignment mechanism, which clamped two

Aligns fiber optic ends exactly to each other and keeps ready for the subsequent Spieissvorgang. Thus, for example, the end of the optical waveguide stub to be connected can be clamped in a first receptacle of the alignment mechanism, for example in a V-groove, and the end of the first and / or second optical waveguide to be connected into a second

Recording be clamped. Typically, the splitter will align the two optical fibers to each other such that the light-guiding cores of the two optical fibers are aligned with each other in both the X, Y and Z axes. Already by such an alignment becomes an optical connection

manufactured, and the meter, which am

Fiber optic stub is connected, the

Characteristic of the coding of the corresponding

Read out optical waveguide. Already enough for a reading a mechanical alignment and it can on the

thermal splicing of optical fibers are dispensed with. However, it is also conceivable that a thermal Spieissverbindung is preferred for certain applications, so that triggered as in normal Spieissvorgängen the arc and the two fibers of the optical waveguide and the fiber stub are welded together. As already mentioned above, for the subsequent release of such a compound of

Optical fiber stub or optical fiber

be severed. If the assignment of the two encodings read out of the first and second optical waveguides is recognized as coincident, a splitter can be used in the usual way for connecting the two optical waveguides. It is then created a thermal splice, so a weld connection between the two optical fibers. The connection of the two optical waveguides is thus produced as lossless as possible. Preferably this will use the same Spieissgerät, which already for the connection of the

Fiber optic cable was used to the measuring equipment. Alternatively, however, a connector can be made. This is particularly advantageous in the first installation, since then planned the connections and the corresponding connectors can be pre-assembled.

At least one of the two optical waveguides can be arranged in a fiber bundle. Accordingly, the step of reading out the coding until finding each other

each assigned to be connected and optical fiber to repeat with another optical fiber from the fiber bundle.

Another object of the present invention relates to the use of a Spieissgerätes in a method as described above.

Another inventive use of a Spieissgerätes serves the particular temporary connection of a

Fiber optic cable to a measuring device. In this case, the measuring means has a fiber optic stub for connection to the

Optical fiber on. One end of the optical waveguide and one end of the optical fiber stub are aligned with each other by means of an alignment mechanism of the splitter. It is sufficient that the fiber ends of the

Fiber optic stub and the optical waveguide only aligned and / or physically

be contacted. Only a temporary connection is made. A thermal splice, as it is usually made with a splitting device, is not absolutely necessary, but can be done depending on the application. By means of such

Then you can use measuring equipment for different purposes

be connected to an optical fiber at short notice, without being extensively equipped with a connector in advance.

The measuring means can read one with a

Fiber optic connected coding serve. Such coding is formed for example in the form of a fiber Bragg grating. However, other codings are conceivable.

A further aspect of the present invention relates to a method for establishing a connection protocol of a continuous fiber-optic connection line from a first to a second network node, in particular from a central office to a telecommunications socket in a building. In this case, the second network node or the first and the second network node are each connected to a coding which can be read out via a measuring line, in particular in the form of a first and a second fiber Bragg grating or are connected. The method comprises the steps:

Connecting a measuring device to the connecting line, in particular to the first network node, - Read the codes of the second network node or the codings of the first and the second

Network node, and

- Create a connection protocol that includes the

read encoding data of the second and possibly the first network node.

Here and below, a network node is understood to mean that point in an optical communication network where individual components are connected. For example, a network node may include the main distributor in a service provider's central office

Road distributor, a service connection box or the

Be telecommunications socket of the end user.

The present method is especially the first time

Creating an FTTH connection for use, where, for example, a blind connection of the individual network nodes, in particular the telecommunications outlets to the Central Office is possible. This is usually the case when several telecommunications outlets are to be connected simultaneously, for example, in the wiring of a

Lodgings or an apartment building. The connections do not have to be created according to predefined associated codings, but the affiliation of the individual network nodes, in particular of the individual telecommunication outlets with the central office, is read out and logged only after their connection. Due to the fact that the coding of the individual telecommunications sockets can be read from the central office, both the route integrity can be checked and the assignment of the individual connections can be made and logged. If both ends with a Coding are equipped, the codings of the interconnected network nodes, in particular the Central Office and the telecommunications outlet can be read directly and logged accordingly. At a later date can be exactly understood which

Network nodes with each other, in particular which

Telecommunications socket to which port is connected in the central office. If doing the individual

Connection lines of the Central Office are connected to a coding, can even be reconstructed, with which connection line of the Central Office the

Telecommunications socket is connected. It goes without saying that the individual network nodes,

In particular, the individual telecommunications sockets have an individual and one-to-one coding, so that this coding allows unambiguous identification. In addition to the pure coding data, the connection protocol can also contain information on the type of fiber used, the length, the

Transmission characteristics of the connection line, such as

For example, attenuation, reflection, dispersion, etc. included. In addition, data for local identification is possible.

The coding data of the second network node or both network nodes, in particular the Central Office and the telecommunications socket and in particular their

Hospitality can be stored in a database. Capturing and storing such data allows the individual fiber optic links to be disconnected

Fiber optic can be reassembled correctly.

The coding data of the database can be used to address the individual network nodes, in particular the individual ones

Use telecommunication socket in communication network become. Thus, for example, it is conceivable that certain information is sent only to network nodes that meet certain criteria. For example, a network access can be linked to the payment of a fee. However, it is also conceivable that certain information is only possible by ordering a corresponding subscription.

On the basis of figures, which represent only embodiments, the invention is explained in more detail below:

Figure 1: A schematic representation of a FTTH network, and

Figure 2: a schematic representation of a

according to the invention use of a Spieissgeräts.

FIG. 1 shows a schematic representation of an FTTH network. Starting from a Central Office CO of one

Service providers and a corresponding main distributor OMDF is to recognize a trunk cable 12, which leads from the main distributor OMDF to the road distributor DP. The trunk cable is

usually a multiple cable or fiber bundle. Each of the individual optical fibers from the trunk cable is connected to an individual fiber Bragg grating FBG2. For the sake of simplicity, however, only a single fiber Bragg grating is used

shown. These fiber Bragg gratings FBG2 allow the

individual identification of the individual fibers of the parent cable 12, which can be read out, for example, at the road distributor DP.

About a distribution cable 10, which also several

Optical waveguide, the road distributor DP is connected to a house connection box BEP a building 1. in the House connection box BEP will now be the individual

Optical fiber of the distribution cable 10 divided into individual Inhousekabel 2. In each case leads a Inhousekabel 2 from

House connection box BEP to a telecommunications socket OTO an end user or a single apartment. In order to be able to individually address the individual end user, the corresponding in-home cable 2 is connected to a coding in the form of a fiber Bragg grating FBG1. Again, this is the

For the sake of simplicity, a fiber Bragg grating is shown only by an end user. It goes without saying that each end user is assigned a corresponding coding in the form of a fiber Bragg grating. These fiber Bragg gratings can directly in the corresponding home cable 2 or in a

Connector of the indoor cable 2 is arranged in the

Telecommunications socket OTO or be installed in a coupling element of the telecommunications socket OTO. Starting from the telecommunication socket OTO of the end user is connected to a connection cable 3, a connection box 4 with the optical telecommunications socket OTO. The connection box 4, for example, converts an optical data signal into

electrical signal around. Thus, the end user can connect via a conventional internal LAN a telephone 6, a computer 7, a TV set 8 and other appropriately equipped devices. Shown in FIG. 1 is the LAN cabling as Ethernet cabling 5.

In the case of an initial connection of an end user to the Central Office CO of the service provider, for example, in the house connection box BEP an optical fiber from the

Distribution cable 10 identified, which with the corresponding coding in the form of a fiber Bragg grating FBG2 on the

Road distribution box DP and the trunk cable 12 is connected. Also identified is the one to be attached Optical waveguide or the corresponding Inhousekabel 2, which leads to the corresponding end user or to its coding in the form of the fiber Bragg grating FBG1. As soon as the two optical fibers to be assigned to each other with their corresponding

Codings are identified, these can be found in the

Domestic service box BEP be connected to each other. Such a connection usually takes place with a splitter and a thermal splice. But it is also conceivable one

Plug connection.

However, if the assignment of coding FBG2 of the Central

Offices CO with the coding FBG1 of each

Telecommunications socket OTO is not yet specified by the service provider, the connection can be made without prior assignment. After the connection has been established, however, it must be measured or its codes read out and logged accordingly.

FIG. 2 shows the schematic use of a splitting device 20 for connecting a first optical waveguide 21 to a second optical waveguide 22

Optical fiber 21 with an end user or better said with an optical telecommunications socket OTO of

Connected to the end user. At the same time, the optical waveguide 21 is connected to a unique coding in the form of a fiber Bragg grating FBG1. The optical waveguide 22 is either directly or for example via one or more

Street distributor DP (see Figure 1) connected to a main distributor OMDF a Central Office CO of a service provider. The optical waveguide 22 is also provided with an individual

Coding in the form of a fiber Bragg grating FBG2 connected. In the illustration according to FIG. 2, both optical waveguides 21 and 22 are each arranged in a fiber bundle 14. It goes without saying it goes without saying that each optical waveguide of the two fiber bundles 14 is each connected to an individual coding in the form of a fiber Bragg grating. For the sake of simplicity, however, only one fiber Bragg grating is ever shown.

To determine the correct to connect with each other

Optical fibers 21 and 22 are these by means of a

Spleissgerätes 20 temporarily connected to a measuring means 25. An optical waveguide stub 28 is connected to the measuring means 25 and is clamped by its free end in the splitting device 20 or in a first receptacle of an alignment mechanism of the splicing device 20. In a second shot of the

Alignment of the splicer 20, for example, the optical waveguide 21 is clamped. Now, the ends of the optical fiber stub 28 and the optical fiber 21 can be aligned with each other in the usual way. The

Spieissgerät this has a display 23, which

magnified represents the two ends, so that a precise alignment is possible. It does not matter if this alignment is done automatically or done manually. Once the two ends are aligned with each other, a signal 26 can be emitted by the measuring means, which along the optical fiber route through the

Optical fiber stub 28 over the aligned ends of the optical fiber stub 28 and the

Optical waveguide 21, is sent over the optical fiber 21 to the optical telecommunications socket OTO. Since the optical waveguide 21 is connected to a fiber Bragg grating FBG1, part of the signal 26 is reflected at this fiber Bragg grating FBG1 and, as a reflected portion 27 of the signal 26, again finds the way back along the optical waveguide path to the measuring means 25 , The measuring means 25 is corresponding to the read encoding on the basis of the reflected portion 27th recognize and display the signal 26. If the displayed coding is the desired encoding of the

act to be joined optical waveguide or the end user to be connected, the optical waveguide 21 can be marked accordingly by a fitter. However, should the

If the coding read out does not correspond to the correct value, then another optical waveguide can be pulled out of the fiber bundle, in the receptacle of the splitting device 20 with the

Fiber optic stub 28 connected and the coding are read out again. This step is then repeated until the read coding corresponds to the coding which is assigned to the end user to be connected.

Similarly, now the second optical waveguide 22 is connected to the measuring means 25 via the splitting device 20. The

Measuring means 25 in turn emits a signal 26 which, via the resulting optical waveguide route up to the

Main distributor OMDF of the service provider arrives. Of the

Optical waveguide 22 is in turn equipped in the region of the main distributor OMDF with a fiber Bragg grating FBG2, so that the signal 26 can in turn be partially reflected and correspondingly re-evaluated in the measuring means 25. Again, the evaluation of the coding of the optical waveguide 22 with

different fibers of the fiber bundle 14 repeated until the corresponding optical fiber to be connected

is identified. It goes without saying that the

Order of reading the coding of the optical waveguide (21, 22) has no effect on the process.

Subsequently, the fiber stub 28, which originates from the measuring means 25, removed from the splitter 20 and the two previously identified optical waveguides 21 and 22 each in

Spississgerät 20 clamped. There is a conventional Splicing process, for example, a thermal splicing process, wherein the orientation of the two optical waveguides 21, 22 in the display 23 of the splicer 20 can be checked.

Claims

claims

1. Method of Creating a Fiber Optic Connection

between a first optical waveguide (21) and a second optical waveguide (22) associated therewith,

especially for creating a continuous

Fiber-optic connection between a central office (CO) and an optical telecommunication socket (OTO) in a building (1), wherein the first optical waveguide (21) is provided with a first coding which can be read out via the first optical waveguide (21), in particular in the form of a first fiber optic cable. Bragg grating

(FBG1), is connected or connected, wherein the second optical waveguide (22) with a second optical waveguide (22) readable second

Coding, in particular in the form of a second fiber Bragg grating (FBG2), is connected or connected, comprising the steps

- reading the first coding of the first

Optical waveguide (21),

- Reading the second encoding of the second

Optical waveguide (22),

- Check the assignment of the two read out

encodings

- Connecting the first optical waveguide (21) with the second optical waveguide (22). A method according to claim 1, characterized in that for reading out the coding of the first and / or the second optical waveguide (21, 22) each have a measuring means (25) connected to the first optical waveguide (21) and / or to the second optical waveguide (22) is, the

Measuring means (25) the characteristic of the first

Optical waveguide (21) and / or the second

Optical waveguide (22) associated encoding via a reflected at the coding portion (27) of the

Reading means (25) emitted signal (26).

A method according to claim 2, characterized in that the measuring means (25) by means of an optical fiber stub (28) to the first optical waveguide (21) and / or to the second optical waveguide (22) is connected.

A method according to claim 3, characterized in that for the connection of the measuring means (25) to the first

Optical waveguide (21) and / or to the second

Optical waveguide (22) an alignment mechanism of a

Spississgerätes (20) is used.

Method according to one of claims 1 to 4, characterized

characterized in that for connecting the first

Optical waveguide (21) with the second optical waveguide (22) a splitter (22) is used.

Method according to one of claims 1 to 5, characterized

characterized in that at least one of the two

Optical waveguide (21, 22) in a fiber bundle (14) is arranged and the step of reading the

Codings until finding the associated and to be connected optical waveguide (21, 22) each with another optical fiber from the fiber bundle (14)

is repeated.

7. Use of a Spieissgerätes (20) in a process

according to one of claims 1 to 6.

8. Use of a Spieissgerätes (20) in particular

temporary connection of an optical waveguide (21, 22) to a measuring means (25), wherein the measuring means (25) comprises a light waveguide stub (28) for connecting the

Optical waveguide (21, 22), characterized

in that one end of the optical waveguide (21, 22) and one end of the optical waveguide stub (28) are aligned by means of an alignment mechanism of the splitting device (20).

be aligned with each other.

9. Use of a splitting device (20) according to claim 8, characterized in that the measuring means (25) for

select

a coding connected to an optical waveguide (21, 22), in particular in the form of a fiber Bragg grating (FBG1, FBG2), is used.

10. A method for establishing a connection protocol of a continuous fiber-optic connection line from a first to a second network node, in particular from a central office (CO) to one

Telecommunications socket (OTO) in a building, wherein the second network node or the first and the second network node each with a via a

Test lead readable coding, especially in shape a fiber Bragg grating (FBG1, FBG2) are connected or connected,

comprising the steps

- Connecting a measuring means (25) with the

Connecting line, in particular with the first

Network node,

- Reading the coding of the second

Network node or the encodings of the first and second network nodes,

- Creating a connection protocol comprising the read encoding data of the second or the first and second network node.

11. The method according to claim 10, characterized in that the coding data of the second network node or the first and the second network node and in particular their Zughörigkeit be stored in a database.

12. The method according to claim 11, characterized in that the coding data from the database will be used to address the individual network nodes.