JPH11352337A - Optical wiring board and optical component housing case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently branch and connect an optical cable side optical fiber to a transmitter at a low cost and to make line monitoring performable for all optical lines in an optical wiring system of a PDS(passive double star) system. SOLUTION: This case 21 houses optical splitters 29 and 29a and a photocoupler 31 inside and optical transmission lines for core wire monitoring are branched from the respective plural optical transmission lines 30 for connecting the optical splitters 29 and 29a and a multi-fiber optical connector 21a for switchably connecting the optical fiber 22a on the side of an optical cable 22. Also, the optical wiring is provided with a case housing part for housing the plural cases 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical distribution board and an optical component storage case for branching and connecting a plurality of optical fibers on an optical cable side to an optical line on a transmission apparatus for transmitting and receiving optical signals.

[0002]

2. Description of the Related Art For a transmission apparatus for transmitting and receiving an optical signal,
As a technology for connecting a large number of lines on the optical cable side (terminal side), a so-called PDS (Passive DoS) that has been put into practical use in recent years has been used.
In an optical wiring system of the (double star) type, it is common to connect an optical fiber on the transmission device side and the optical cable side to a switchable connector with an optical distribution board installed in the office together with the transmission device. Further, in this optical wiring system, an optical splitter inserted between both optical lines on the transmission device side and the optical cable side allows the optical line on the transmission device side to be
It has been proposed to branch and connect a plurality of optical fibers on the optical cable side to increase the number of lines corresponding to the transmission device.

FIGS. 6 and 7 are views showing an example of an optical wiring system having a conventional configuration. FIG. 6 is an overall view showing an optical wiring board structure installed near a transmission device, and FIG. 7 is an optical wiring system. FIG. In the optical wiring system of the conventional configuration shown in FIGS. 6 and 7, two optical wiring boards 2 and 3 installed in the office together with the transmission apparatus 1 are used, and the optical cable 4 on the transmission apparatus 1 side is used.
Are branched and connected to many optical fibers of the optical cable 5. The optical cable 5 is an external optical cable itself drawn from outside the office, or an optical cable connected to the external optical cable drawn into the office via a fusion bridge or the like.

[0006] As shown in FIG. 6, an optical cable 5, a cable storage section 7 into which an in-station optical cable 6 routed between the optical distribution board 2 is drawn, and an optical component storage case are provided in the optical distribution board 2. A shelf-shaped case storage portion 9 in which a large number of 8 are arranged and stored is provided. On the other hand, in the optical distribution board 3, a cable storage section 10 into which the optical cables 4 on the transmission apparatus 1 side and the optical cables such as the intra-office optical cable 6 are drawn in, and a shelf-like case storage in which a large number of optical component storage cases 11 are arranged and stored. A part 12 is provided.

As shown in FIGS. 6 and 7, the optical cable 5 has a plurality of optical fiber tape cores 5a exposed to the terminal, each of which is so-called terminated by an optical connector 5b so as to be connectable to a connector. An optical cable, and the optical fiber ribbon 5a is
Then, the optical connector 5b is connected to the optical connector 8a on the side of the optical component storage case 8 to be connected to the target optical component storage case 8. In the optical component storage case 8,
From the opposite side, a single-core optical cord 6 b branched from the terminal of the intra-office optical cable 6, which is a terminated optical cable, is connected to an optical connector 8.
b so that the optical line on the optical cable 5 side related to the optical fiber ribbon 5a and the target optical line on the local optical cable 6 side via the optical component storage case 8 in a pair. Connected to 1.

[0008] In the optical distribution board 3, the eight-core optical fiber ribbon 6 a of the terminal of the in-house optical cable 6 drawn into the cable housing 12 is drawn into the case housing 12, and the target optical component housing 11 is inserted into the case housing 12. The optical connection is made via the fusion portion 13. The fused part 1 of the optical component storage case 11
A single-core optical cord 4a branched from the terminal of the transmission-device-side optical cable 4 is connected to an optical connector 1
4 and an optical component storage case 1
Two 1-input 16-branch optical splitters 15 are accommodated in 1, and one optical splitter 15 is used to connect 16 optical fibers 6 on the local optical cable 6 side, for a total of 16 optical fibers 6.
a is connected to the optical line on the transmission device 1 side.

Each of the optical splitters 15 in the optical component storage case 11 has three photoelectric conversion devices 1 a built in the transmission device 1,
1b, 1c are connected via a single-core optical cord 4a, respectively, and the output optical signals from these photoelectric conversion devices 1a, 1b, 1c all have the same branch path in the optical splitter 15 and are connected to the local optical cable 6 side. The two optical fibers are branched into a total of 16 optical fiber ribbons 6a. Conversely, an optical signal transmitted from the optical cable 5 to the transmission device 1 via the intra-office optical cable 6 is transmitted from the optical splitter 15 to the three photoelectric conversion devices 1a, 1b, and 1c through the single-core optical code 4a. . Here, only the photoelectric conversion device 1c supports transmission and reception of video, and the other photoelectric conversion devices 1a, 1c.
“b” corresponds to transmission and reception of general communication signals. Only communication light of a specific wavelength is transmitted from the optical cable 5 to the photoelectric conversion devices 1a and 1b via the optical filter 16.

In the optical component housing case 8 housed in the optical distribution board 2, the optical fiber 8 c connecting the optical connectors 8 a and 8 b is connected to the optical fiber 18 via the optical coupler 17.
a and 18b are pulled out. This optical fiber 18
Optical fibers (not shown) on the side of the core selection device 19 that constitutes an optical line monitoring device that monitors an abnormality such as disconnection of the optical line using an optical pulse are connected to the connectors a and 18b by connectors.
An optical pulse output from the optical line monitoring device is sent. The optical pulse sent to the optical fiber 18a is transmitted to the optical fiber 8c via the optical coupler 17, and then transmitted to each optical transmission line of the optical fiber ribbon 5a on the optical cable 5 side. The optical pulse sent to the optical fiber 18b is transmitted to each single-core optical code 6b via the optical coupler 17 and the optical fiber 8c. The reflected light generated on the optical line on the optical cable 5 side and the optical line on the transmission device 1 side by the transmission of the optical pulse is in the reverse order of the transmission, that is, the optical fiber 8c, the optical coupler 17, and the optical fibers 18a and 18b.
In this order, the light returns to the optical line monitoring device, and is received and observed by the optical pulse tester of the optical line monitoring device. As a result, monitoring such as disconnection of the optical line is performed. The optical fiber cable monitoring device 19 of the optical line monitoring device is housed in each stage of the shelf-shaped case housing portion 9 of the optical distribution board 2 and connected to the optical component housing case 8 housed in each stage. All the optical lines on the transmission side and the transmission device 1 side can be monitored in single-core units.

In the optical distribution system constituted by using the optical distribution boards 2 and 3, for example, in order to correspond to the 8000 optical fibers 5, the optical fiber corresponding to the 8-core optical fiber is provided in the case storage section 9 of the optical distribution board 2. 1,000 component storage cases 8 are accommodated, and two optical splitters 15 are accommodated, and 250 optical component storage cases 11 corresponding to 32 cores are accommodated in the case storage section 12 of the optical wiring board 3. Then, in the optical distribution board 2, the single-core optical cord 6 b of the terminal in the office optical cable 6 is switched and connected to the optical component storage case 8, so that each optical line on the optical cable 5 side is connected to the transmission device 1. Can be switched in single-core units.

[0010]

However, in the optical wiring boards 2 and 3 as described above, the number of optical component storage cases 8 and 11 to be stored increases, so that an increase in size is unavoidable, and the installation space due to downsizing is inevitable. It has been difficult to save space and reduce costs. In addition, since two optical distribution boards 2 and 3 are required, and an intra-office optical cable 6 routed between them is also required, it is inevitable that the station is increased in size and cost reduction is difficult. Was. For this reason, it was difficult to further increase the number of corresponding hearts. Further, in the above-mentioned optical wiring system, in order for the optical line monitoring device to monitor all the optical lines on the optical cable 5 side and the transmission device 1 side, 8000 cores on one side and 16000 cores on both sides are monitored. That is, the monitoring of the optical line on the optical cable 5 side requires 8000 cores, and the monitoring of the optical line from the optical component storage case 8 to the transmission device 1 side requires the single-core optical cord 6b for the optical connector 8b of the optical component storage case 8. It is necessary to monitor the connection state of the optical fiber cable and disconnection of the intra-office optical cable 6, and the number of monitoring cores cannot be omitted. For this reason, in the optical distribution board 2, the core wire selecting device 1
9 increased the number of optical distribution boards 2 and increased the cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it has been made possible to reduce the size of an optical wiring board, to save space by reducing the number of installations, and to reduce the cost. It is another object of the present invention to provide an optical wiring board and an optical component storage case that can be simplified and reduced in cost by reducing the number of corresponding cores.

[0012]

The present invention has the following features to attain the object mentioned above. That is, according to the first aspect of the present invention, there are provided a cable storage portion into which a multi-core optical cable terminal is drawn, and a case storage portion in which a plurality of optical component storage cases each storing an optical splitter and an optical coupler are stored. The optical component storage case is configured to branch-connect an optical fiber on the transmission device side for transmitting and receiving an optical signal to the multi-core optical fiber on the optical cable side via the optical splitter; A multi-fiber optical connector to which the optical fiber on the side is switchably connected, and a monitor branched via the optical coupler from each of a plurality of optical transmission paths connecting the optical connector and the optical splitter. An optical wiring board, wherein a core selection device of an optical line monitoring device that monitors an optical line using an optical pulse can be connected to the optical transmission line for optical distribution. It was the solution. According to a second aspect of the present invention, in the optical distribution board according to the first aspect, a multi-fiber connection portion that is switchably connected to the multi-fiber optical fiber on the optical cable side by a connector,
A plurality of single-core optical fiber sections that are switchably connected to the optical connector of the optical component storage case, and a branch section that branches the multi-core connection section to the single-core optical fiber section. The multi-core optical fiber on the optical cable side and the optical connector of the optical component storage case are connected by a connection cord component, and the multi-core can be switched and connected collectively. According to the third aspect of the present invention, the main optical fiber is configured to be branched and connected to the multi-fiber branch optical fiber via the optical splitter housed therein, and the branch optical fiber is switchable. An optical line using an optical pulse is connected to a monitoring optical transmission line branched from each of a plurality of optical transmission lines connecting between the multi-fiber optical connector to be connected and the optical splitter via the optical coupler. An optical component storage case, characterized in that a core selection device of an optical line monitoring device for monitoring the optical line is connectable, is a means for solving the above problem. In each invention, a multi-core optical fiber and a multi-core branch optical fiber are, for example, multi-core optical fibers other than a configuration in which the optical fiber itself is a multi-core optical fiber such as a multi-core optical cable or a multi-core optical fiber tape. A configuration including a plurality of optical fibers is also included. Similarly, a multi-core optical connector also includes a configuration that is an optical connector itself that can handle multiple cores, and a configuration that includes, for example, a plurality of single-core optical connectors.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. FIG. 1 is a front view showing an optical wiring board 20 of the present embodiment, FIG. 2 is a rear view, FIG. 3 is a view showing an optical component storage case 21, (a) is a front view,
4B is a side view, and FIG. 4 is an optical wiring diagram near the optical distribution board 20. As shown in FIGS. 1 and 2, an optical cable 22 and an optical cable 2 on the transmission device 23 side are provided inside the optical distribution board 20.
The cable storage section 25 into which the cable 4 is drawn, and the shelf-shaped case storage section 2 in which a large number of optical component storage cases 21 are arranged and stored in multiple stages (for example, a total of 125 sheets are stored in five rows of 25 sheets).
6 and is installed in the station together with the transmission device 23.

As shown in FIGS. 1 and 4, the optical cable 22 is a so-called terminated optical cable, which is an external optical cable itself drawn from outside the office or connected to an external optical cable by a fusion splicer (not shown). is there. From the end of the optical cable 22 drawn into the cable housing portion 25, a large number of optical fibers 22a, which are eight-core optical fiber ribbons terminated by an optical connector 22b attached to the tip, are drawn out. These optical fibers 22a are switchably connected to an optical connector 27b that terminates the tip of a multi-core connection portion 27a corresponding to eight cores of the connection cord component 27 in the cable storage portion 25. In the present embodiment, as the optical connectors 22b and 27b, for example, an MT type optical connector (Mecanically Transferable) defined in JIS C5981 is employed. However, the present invention is not limited to this, and various optical connectors can be employed. is there.

The connection cord component 27 is a so-called converted core, and includes a plurality of forty multi-core connection portions 27a and a plurality of single-core branches from the multi-core connection portion 27a via a branch portion 27c. (320) single core optical fiber section 27d
(Such as a single-core optical cord). The tip of each single-core optical fiber section 27d terminated by the optical connector 27e is drawn into the case storage section 26 from the cable storage section 25, and the multi-core optical connector 21a corresponding to 16 fibers of the target optical component storage case 21 is provided. The terminal is switchably connected to the terminal. As the optical connector 21a, for example, a so-called MU
Miniature-Unit Coupling optical fiber
An SC type optical connector (Single fiber Coupling optical fiber connector) or the like is adopted as the optical connector 27e at the tip of the single-core optical fiber portion 27d.

In the cable housing portion 25, the optical fiber 22a of the optical cable 22 and the connecting cord component 27 are bent and stored with a bending radius larger than a specified value which does not always affect the optical characteristics, by a plurality of cable supporting portions 25a. Accordingly, the switching connection operation between the optical fiber 22a of the optical cable 22 and the multi-core connection portion 27a of the connection cord component 27 can be efficiently performed. That is, in the switching connection work performed by the dedicated switching device, the optical cable 2
The two optical fibers 22a and the multi-core connection portion 27a of the connection cord component 27 need to be pulled out from the cable storage portion 25. However, the connected optical connectors 22b and 27b are stored in the central portion of the cable storage portion 25. In addition, it is easy to carry out extra length processing at the time of pulling out and re-storing, and a work space can be easily secured around the drawer.

Further, since the branch portion 27c of the connecting cord component 27 is supported by the central portion of the case housing portion 26 by the cable supporting portion 25a, the branch portion 27c is connected to the optical connector 21a of the optical component housing case 21. Optical connector 27
The length of each single-core optical fiber portion 27d laid from e to the branch portion 27c can be made substantially equal. Connect the optical fiber 22a of the optical cable 22 to the connecting cord component 2
7, the optical connector 21a of the optical component storage case 21
, The length of the optical fiber 22a secured at the terminal of the optical cable 22 can be reduced to about half of the conventional length. The optical fiber 22a of the optical cable 22 is directly connected to the optical component storage case 21.
When the optical connector 21a is connected to the optical connector 21a, the entire length of the optical fiber 22a is moved during the switching connection.
At the time of the switching connection, only the single-core optical fiber portion 27d of the connection cord component 27 needs to be operated, so that a portion to be moved is small, and the workability of the switching connection is improved.

As shown in FIG. 3, the optical component storage case 21
Is a thin plate in appearance, and is a front side of the optical distribution board 20 (FIG. 3).
(A) On one side (terminated side) facing the left side (the front side in FIG. 1), four multicore optical connectors 21a (64 cores) are provided. The back side of the optical distribution board 20 (FIG. 3)
(A) On the other side of the optical component storage case 21 facing the right side (the front side in FIG. 2), optical connectors 21b, 21c,
21d. As shown in FIG. 4, two optical splitters 29 each having 6 inputs and 32 outputs and an optical transmission path for optically connecting between each optical splitter 29 and the optical connector 21 a are provided in the optical component storage case 21. 8 multi-core optical fibers 30 (such as an optical fiber ribbon) and two 1-core optical fibers 30
The 6ch optical coupler 31 is housed.

Each optical splitter 29 is composed of two elements 29a having three inputs and sixteen outputs. On the output side (the left side in FIG. 4) of each element 29a, two 8-core elements are connected via a fusion part 32. The core optical fibers 30 are connected, and four multi-core optical fibers 30 are connected per one optical splitter 29.
The three optical fibers 29b drawn from the input side (the right side in FIG. 4) of each element 29a of each optical splitter 29 are 3
And four optical fibers 29 connected to one optical connector 21b.
b, a four-fiber optical fiber 24a of the terminal of the optical cable 24 on the transmission device 23 side is switchably connected to the connector.

As shown in FIGS. 3 and 4, three optical connectors 21b are provided in the optical component storage case 21, and each of the optical connectors 21b has a cable storage portion 25 (on the rear side of the optical distribution board 20). The four-fiber optical fibers 24a (for example, four-fiber optical fiber ribbons, four-fiber optical cords, etc.) drawn out from the terminal of the transmission apparatus side optical cable 24 drawn in to the connector are switchably connected to the connector.

As shown in FIG. 4, two two-core optical fibers 24b branched from the optical fiber 24a at the transmission device 23 side terminal of the optical cable 24 are respectively connected to the transmission device 2a.
3 are connected to photoelectric conversion devices 23a and 23b mounted in the device. A pair of photoelectric conversion devices 23a connected to an optical fiber 24b branched from the same optical fiber 24a,
The communication unit 23b forms a communication signal by cooperating with the transmission signal of the 0 system and the 1 system to the optical signal. Also, the transmission device 2
The photoelectric conversion devices 23c and 23d mounted on the transmission / reception device 3 transmit and receive video transmission signals, and output signals from the photoelectric conversion devices 23c and 23d
4b, the optical fiber 24a, and the optical fiber 29b, the light is transmitted to each element 29a of each optical splitter 29,
The light is branched into 16 by 9a and transmitted to the optical cable 22 side. Conversely, the video transmission signal transmitted from the optical cable 5 side is transmitted from each element 29a of each optical splitter 29 to the photoelectric conversion devices 23c and 23d corresponding to the video transmission signal. Transmission to the corresponding photoelectric conversion devices 23a and 23b is blocked by the optical filter 29c provided in the optical splitter 29. For this reason, the photoelectric conversion devices 23a and 23 corresponding to the general communication signal
In b, the video transmission signal from the optical cable 22 side is not transmitted, and only the general communication signal can be transmitted and received with high accuracy. The optical component storage case 21 branches 64 optical fibers on the optical cable 22 side with respect to four optical fibers 24a of each pair of the photoelectric conversion devices 23a, 23b, 23c, and 23d of the transmission device 23. Can be connected.

As the optical connector 21b, for example,
A so-called MPO type optical connector (Multifiber Push On) or the like defined in JIS C5982 is adopted, and the optical fiber 24a on the transmission device 23 side is easily attached to and detached from the optical connector 21b by a plug having a distal end. The optical fiber 24a terminated by the MPO type optical connector is connected to an optical connector (not shown) attached to terminal plates 20a and 20b provided in the optical distribution board 20, as shown in FIGS. ), It is also possible to optically connect an external optical cable drawn into the optical distribution board 20 or another optical distribution board.

The optical coupler 31 is disposed in the middle of two multi-core optical fibers 30 for connecting between the same element 29a of the optical splitter 29 and the optical connector 21a. From multi-core optical fiber 30, total 1
Seven optical fibers 31a and 31b are branched. A total of four optical couplers 31 are provided for the eight multi-core optical fibers 30 in the optical component storage case 21. Of the 17 optical fibers 31a and 31b branched from the two multi-core optical fibers 30 by one optical coupler 31,
The 16 optical fibers 31a correspond to optical transmission from the multi-core optical fiber 30 to the optical cable 22.
One optical fiber 31b corresponds to optical transmission from the multi-core optical fiber 30 to the transmission device 23. Of the 64 optical fibers 31a branched from the eight multi-core optical fibers 30 by the four optical couplers 31, 56 are:
Seven 8-core optical fibers 21e (optical fiber ribbon)
And the remaining eight optical fibers 31a and 4
The one optical fiber 31b is a single 12-fiber optical fiber 21.
f (optical fiber ribbon).

As shown in FIG.
e and 21f are connected by optical connectors 21c and 21d so as to be connectable to the connectors.
1 is drawn out from the side. Optical connector 21
c is an 8-core MT optical connector, and 21d is a 12-core MT optical connector. In the optical fibers 21e and 21f, optical fibers 28a and 28b (see FIG. 4) drawn out from a core wire selecting device 28 ("fs" in FIGS. 1 and 2) housed in the lowermost stage of the case housing portion 26. The connector is switchably connected. Optical fiber 28a on the core wire selecting device 28 side
The optical fiber 28b has 12 cores, and the MT fiber optic connectors 28c and 28d are connected so as to be connectable. The optical connectors 21c and 21d are usually provided with connector housings 26 provided at respective stages of the case housing 26.
A is stored in a protective case, and it is taken out only at the time of work such as switching connection or the like, and the work is performed. When it is connected to the optical connectors 28c and 28d, it is stored in the connector storage section 26a together with the extra connection length of the optical connectors 28c and 28d and the optical fibers 21e, 21f, 21a and 28b.

FIG. 5 is a perspective view showing an optical connector 21d corresponding to 12 cores. As shown in FIG.
d at both ends in the longitudinal direction of the rectangular joining end surface 21g,
A guide pin hole 21h into which a guide pin for positioning defined in JIS C5981 is inserted is formed, and a total of 12 optical fibers 31 are provided at the center of the joint end face 21g.
a, 31b (bare fiber) are exposed. The 12 exposed at the center of the joint end face 21g of the optical connector 21d.
Of the books, the central eight are optical fibers 31a, and the two at both ends are optical fibers 31b, for a total of four. The 12-core optical connector 28d on the side of the core selection device 28 has the same configuration as the optical connector 21d. Guide pin holes 21h at both ends of joint end surface 21g of optical connector 21d
And the optical fiber 31 at the joint end face 21g
The exposed positions of the a and 31b coincide with the 12-fiber optical connector 28d on the side of the core selection device 28. However, the exposed position of the guide pin hole 21h and the center 8
The exposed position of the optical fiber 31a coincides with the eight-core optical connector 21c, and also coincides with the eight-core optical connector 28c on the core selection device 28 side.
Can also be connected to the optical connector 28c. At this time,
Functions as an 8-core optical connector. In addition, the optical connector 21
Connection is possible between c and 28d.

In FIG. 4, a cord selecting device 28 constitutes an optical line monitoring device using light pulses.
A specific optical fiber (one or more bare fibers) selected from a total of 68 optical fibers 28a, 28b,
An optical pulse output from an optical pulse tester (not shown) is incident. The optical pulse sent to the target optical fiber on the optical fiber 28a, 28b side is
Is input from the optical coupler 31 to the multi-core optical fiber 30 through the optical fibers 21e and 21f connected to the optical fiber 21e. The optical pulse incident on the multi-core optical fiber 30 through the optical fiber 31a is transmitted to the optical line on the optical cable 22 side, and the optical pulse incident on the multi-core optical fiber 30 via the optical fiber 31b is transmitted to the transmission device 23 side. To the optical line. The reflected light generated during transmission on the optical line on the optical cable 22 side and the optical line on the transmission device 23 side is transmitted from the multi-core optical fiber 30 via the optical coupler 31 to the optical fibers 21 e and 21 f in the reverse order of the incidence of the optical pulse. The optical fiber 28a, 28b, and the core selection device 28 return to the optical line monitoring device in this order, and are finally received and observed by an optical pulse tester, thereby monitoring whether there is an abnormality such as disconnection of the optical line. Is done. The optical fiber 3
1a, 31b, 21e and 21f form a monitoring optical transmission line according to the first and third aspects. Also, the optical connector 21a
As an optical transmission line between the optical splitter 29 and the optical transmission line for monitoring, various configurations such as a substrate type optical waveguide other than the optical fiber can be adopted.

The optical coupler 31 is used for all the optical fibers (optical fiber wires) of the related multi-core optical fiber 30.
Optical fiber 31a capable of transmitting light in the direction of optical cable 22
However, the optical fibers 31b branched to be able to transmit light in the direction of the transmission device 23 are connected to the same element 29a of the same optical splitter 29. There is only one optical fiber. That is, 2 connected to the same optical splitter element 29a
A total of 16 optical fibers of the multi-core optical fiber 30 are:
Same optical splitter element 29a, same optical connector 21
b, the optical component is connected to the optical line on the transmission device 23 side, so that only one arbitrary optical fiber in the two multi-core optical fibers 30 receives an optical pulse and When monitoring the optical line from the transmission line 23 to the transmission device 23, it is the same as monitoring the line of all the transmission device 23 side optical lines related to the two multi-core optical fibers 30.
Therefore, from the two multi-core optical fibers 30, via the optical coupler 31, 16 optical fibers 31a for monitoring the line on the optical cable 22 and one optical fiber 31b for monitoring the line on the transmission device 23 are provided. The optical component storage case 21 as a whole can be used for monitoring the optical cable 22 side.
It is only necessary to pull out optical fibers for a total of 68 cores for monitoring the number of hearts, that is, 4 for monitoring the transmission device 23 side.

When the optical connector 21d is connected to the 12-fiber optical connector 28d on the side of the optical fiber selecting device 28, all the optical fibers 31a, 3a on the joint end face 21g of the optical connector 21d are connected.
1b is an optical fiber 28b of the optical fiber selecting device 28 side.
It is optically connected to the whole of the heart and can monitor the optical line on the optical cable 22 side and the optical line on the transmission device 23 side by the optical pulse output from the optical line monitoring device. Optical connector 21d
Is connected to the optical connector 28c corresponding to the eight cores on the core selecting device 28 side, only the eight optical fibers 31a at the center of the joint end face 21g of the optical connector 21d are connected to the eight optical fibers 28a on the core selecting device 28 side. The optical fiber is connected to the optical fiber, and the optical fiber 31b on both sides of the optical fiber 31a is an optical fiber 28b.
a is not connected, and only the optical line on the optical cable 22 side can be monitored.

There is a possibility that an optical component storage case 21 that is not connected to the transmission device 23 side may be stored in the case storage section 26 of the optical distribution board 20. In such a case, only the optical line on the optical cable 22 side is provided. Can be monitored. At this time,
The optical connector 21d can be applied without any change. When only the optical line on the optical cable 22 side is monitored, the optical fiber 22a of the terminal of the optical cable 22 is pulled into the case storage section 26 of the optical distribution board 20, and the optical fiber 22a is connected without passing through the optical component storage case 21. It is also possible to directly connect to the optical fibers 28a and 28b on the selection device 28 side (so-called direct receipt). Optical fiber 2
The optical connector 22b (8-fiber MT optical connector) at the tip of 2a is an optical fiber 21e on the optical component storage case 21 side.
By using the same configuration as the optical connectors 21c and 21d at the distal end of the optical fiber 21f, the optical fiber
The optical connectors 28c, 28d (both MT optical connectors) at the tips of 8a, 28b can be freely switched and connected. Optical connectors 22b, 28c, 28 connected
d is protected and stored in the connector storage section 26a so that it can be taken out.

In the optical distribution system constituted by the optical distribution panel 20 and the optical component storage case 21, in order to correspond to the 8000-core optical cable 22 on the optical cable 22 side, the case storage section 26 of the optical distribution panel 20 must be A total of 125 optical component storage cases 21 corresponding to 64 cores are stored, and through these optical component storage cases 21 and the connecting cord components 27,
An optical connection may be made between the optical fiber 22a on the optical cable 22 side and the optical fiber 24a on the transmission device 23 side. Thus, by the action of the optical splitter 29 built in the optical component storage case 21, the four-fiber optical fiber 24a
Can be branched and connected to 8000 optical lines on the optical cable 22 side. Therefore, in the optical distribution board 20, the number of installations is only one, and the installation space is greatly reduced and the installation space is significantly reduced as compared with using two optical distribution boards 2 and 3 as in the conventional configuration. Cost reduction becomes possible.
Further, since the number of optical component storage cases 21 is significantly reduced (about one tenth) as compared with the conventional optical wiring board, the size is reduced, the workability of assembly is improved, and the number of components is reduced. Cost reduction is realized. Regarding the assembling workability, when assembling the optical component storage case 21,
2 is one of the advantages, and the workability can be greatly improved as compared with fusion splicing of the target optical fiber to the optical component storage case stored in the optical distribution board. .

To switch and connect a specific single optical fiber line of the optical fiber 22a on the optical cable 22 side to the optical fiber 24a on the transmission device 23 side, the single-core optical fiber portion 27d of the connecting cord component 27 is connected. It is sufficient to switch and connect to the optical connector 21a of the optical component storage case 21. Alternatively, the optical connector 27b of the multi-core connection portion 27a of the connection cord component 27 and the optical connector 22b at the tip of the optical fiber 22a on the optical cable 22 are switched and connected, and the optical lines for eight cores are switched collectively. It is also possible to connect. As described above, the switching connection of the optical line on the optical cable 22 side to the optical fiber 24a on the transmission device 23 side can be easily performed by operating the single-core optical fiber portion 27d and the multi-core connection portion 27a of the connection cord component 27. it can.

The optical cable 22 and the transmission device 2
In order to monitor all the optical lines on the three sides, 125 optical fibers 21e pulled out from each optical component storage case 21,
21f, the optical fibers 28 on the side of the core selection device 28
a and 28b are connected. For each optical component storage case 21, 64 cores on the optical cable 22 side, 4 cores on the transmission device 23 side,
Since a total of 68 optical fibers 21e and 21f are pulled out, the total number of optical fibers 21e and 21f pulled out from all 125 optical component storage cases 21 is 8 in total.
500 hearts. Therefore, the capability of the optical fiber selection device 28 of the optical line monitoring device only needs to be 8500 cores,
Compared to installing a plurality of core selection devices corresponding to 16000 cores in the case housing in the optical wiring board of the conventional configuration,
The number of corresponding hearts can be greatly reduced. For this reason, in the optical wiring board 20 of the present embodiment, only two core wire selection devices 28 need to be installed at the lowermost stage of the case housing section 26, and the optical wiring board 20 can be reduced in size and cost. Become.

The present invention is not limited to the above embodiment. For example, the number of cores and the number of optical cables, optical component storage cases, optical splitters, optical couplers, and other optical components housed in the optical component storage cases are provided. Needless to say, the type of the optical connector used for connecting the optical fibers can be appropriately changed. In addition, the application target of the optical component storage case is not limited to the optical distribution board 20, but can be applied to a place where a branch of an optical line is required in various optical distribution systems. The transmission device-side optical fiber 24 according to the present embodiment
“a” corresponds to the basic optical fiber described in claim 3, and the optical fiber 22 a on the optical cable 22 side or the connecting cord component 27 corresponds to the branch optical fiber described in claim 3.

[0034]

As described above, according to the optical distribution board of the first aspect, (a) the optical fiber of the transmission device side is provided with the optical fiber in the optical component storage case stored in the case storage portion. Optical splitter for branching connection to the multi-core optical fiber on the side, and an optical transmission path connecting the multi-core optical connector to which the optical fiber on the optical cable side is switchably connected and the optical splitter And an optical coupler for sending an optical pulse output from the optical line monitoring device, and a single unit, a function of an optical distribution board for branch connection of the optical line on the transmission device side and the optical cable side, and a light beam Since it also has the function of an optical distribution board for connection with a road monitoring device, the number of optical distribution boards to be installed can be reduced, installation space can be reduced, cost can be reduced by reducing the number of components, and the like. (B) The above (a) This eliminates the need for an optical cable for connecting the optical distribution boards, thereby further reducing the space and cost. (C) The above (a) and (b) eliminate the need for the optical cable of the optical distribution board. In addition, the number of optical component storage cases and the like is reduced, so that assembling becomes easy and cost reduction is possible. (D) To monitor the optical lines on both sides of the transmission device side and the optical cable side, The number of cores of the optical line monitoring device that sends the optical pulse is small, and the optical line monitoring device for sending the optical pulse to the selected target optical line can be reduced in size and the number of installed optical line monitoring devices. An excellent effect is achieved in that the entire optical wiring board can be reduced in size and cost.

According to the optical distribution board of the second aspect, the multi-core connection portion switchably connected to the multi-core optical fiber on the optical cable side and the optical connector of the optical component storage case are switched. A multi-core fiber on the side of the optical cable is provided by a connecting cord component comprising a plurality of single-core optical fiber portions that are connectably connected by a connector and a branch portion that branches the multi-core connection portion to the single-core optical fiber portion. Is connected between the optical fiber of the optical component storage case and the optical connector of the optical component storage case. By simply switching and connecting the optical fiber portions, the optical fiber on the optical cable side can be easily switched and connected to the target optical line on the transmission device side in a single fiber unit. (F) For the multi-core optical fiber on the optical cable side And multi-hearted Parts By switching connect and collectively optical line of the optical cable side a plurality center units, exhibits an excellent advantage of the ability to switch connection to the transmission device side optical path.

According to the optical component storage case of the third aspect, the main optical fiber is branched and connected to the multi-core branch optical fiber via the optical splitter housed therein. The monitoring optical transmission line branched via the optical coupler from each of a plurality of optical transmission lines connecting between the multi-fiber optical connector and the optical splitter to which the branch optical fiber is switchably connected, Since the optical fiber monitoring device that monitors the optical line using optical pulses can be connected to the optical fiber monitoring device, just by interposing the core optical fiber and the multi-core branch optical fiber, The two optical fibers can be easily switched and switchable between the two optical fibers.
Moreover, there is an excellent effect that the optical paths of both optical fibers can be monitored efficiently by the optical pulse of the optical line test apparatus.

[Brief description of the drawings]

FIG. 1 is a front view showing an optical distribution board according to an embodiment of the present invention.

FIG. 2 is a rear view of the optical distribution board of FIG. 1;

3A and 3B are views showing an optical component storage case according to one embodiment of the present invention, wherein FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is an optical wiring diagram near the optical wiring board and inside the optical component storage case.

FIG. 5 is a perspective view showing an optical connector terminating an optical fiber constituting a monitoring optical waveguide.

FIG. 6 is a front view showing a conventional optical wiring board structure.

FIG. 7 is an optical wiring diagram showing a configuration example of an optical wiring system using the optical wiring board of FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 20 ... Optical distribution board, 21 ... Optical component storage case, 21a ... Optical connector (MU type optical connector), 21e, 21f ... Monitoring optical transmission line (optical fiber ribbon), 22 ... Optical cable, 22a ... Optical fiber ( Branch optical fiber, optical fiber tape core), 23 ... Transmission device, 24 ... Optical cable (transmission device side optical cable), 24a ... Optical fiber (backbone optical fiber, optical fiber tape core), 25 ... Cable storage part, 26 ... Case storage part, 27 ... connecting cord parts, 2
7a: multi-core connection portion, 27c: branch portion, 27d: single-core optical fiber portion, 28: core selection device, 29: optical splitter,
29a: optical splitter (element), 30: optical fiber (multi-core optical fiber ribbon), 31: optical coupler, 31a,
31b ... Monitoring optical transmission line (optical fiber).

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshihiro Momitsu 1440 Mutsuzaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Plant

Claims (3)

[Claims] 1. A multi-core optical cable (22), a cable housing portion (25) into which a terminal is drawn, and an optical component housing case (21) housing therein optical splitters (29, 29a) and an optical coupler (31). And a case housing portion (26) for housing a plurality of optical components, wherein the optical component housing case is provided with an optical fiber (24, 24a) on the transmission device (23) side for transmitting and receiving an optical signal through the optical splitter. A multi-core optical connector (21a), which is configured to be branched and connected to the multi-core optical fiber (22a) on the optical cable side, and to which the optical fiber on the optical cable side is switchably connected. A plurality of optical transmission lines (3) connecting between the connector and the optical splitter.
0) to the monitoring optical transmission lines (31a, 31b, 21e, 21f) branched via the optical coupler, respectively.
An optical distribution board (20), characterized in that a core selection device (28) of an optical line monitoring device for monitoring an optical line using an optical pulse is connectable. 2. A multi-core connection section (27a) switchably connected to a multi-core optical fiber on the optical cable side.
And a plurality of single-core optical fiber portions (2) switchably connected to the optical connector of the optical component storage case.
7d) and a connection cord component (27) including a branching portion (27c) for branching the multi-core connection portion into the single-core optical fiber portion. 2. The optical wiring board according to claim 1, wherein the optical wiring board is connected to the optical connector of the component storage case so that the multiple cores can be switched and connected collectively. 3. An optical splitter (29, 2) housed therein.
9a), the trunk optical fiber (24a) is configured to be branched and connected to the multi-core branch optical fiber (22a), and the multi-core branch optical fiber is switchably connected. From each of the plurality of optical transmission lines (30) connecting between the optical connector (21a) and the optical splitter, a monitoring optical transmission line (31a, 31b, 21e, 21f) An optical component storage case (21), wherein a core selection device (28) of an optical line monitoring device that monitors an optical line using an optical pulse is connectable.