JP4299823B2 - Unbalanced waveguide splitter - Google Patents

Description

The present invention relates to provision of a line to an optical subscriber in an optical communication service.

  Conventionally, when an unbalanced splitter is required, there is a conventional technique in which a fiber-type splitter is used and configured by multistage connection of an unbalanced splitter 1 × 2 and a balanced splitter 1 × 2 according to the required number of output ports.

At this time, the output optical fiber has a conventional technique in which a required number of single-core wires or a required number of single-core wires are later arranged in a ribbon shape to form a tape. Further, when an unbalanced splitter is required, there is a conventional technique in which an unbalanced fiber type splitter and a balanced waveguide splitter are connected in combination.

Further, according to, for example, Japanese Patent Application Laid-Open No. 9-33740, an unbalanced waveguide splitter is used as a Y-branch structure of a waveguide that realizes unbalance, and the central axis between one input waveguide and both branch waveguides is There is a conventional technique to shift.

First page of JP-A-9-33740

When an unbalanced splitter is provided by the fiber type splitter described in Patent Document 1, a multistage connection of an unbalanced splitter 1 × 2 and a balanced splitter 1 × 2 is required depending on the required number of outputs. Connection is common.

For this reason, it is generally necessary to store these in some case. The unbalanced connection is made in multiple stages from the fixing / accommodating space of the fiber-type splitter and the fixing / accommodating space of the fusion protection sleeve at the fusion-bonded location. As a splitter, the case is relatively large, and there is a problem that the cost for realizing multi-stage connection increases.

Further, it is difficult to store the unbalanced splitters connected in multiple stages in the closure when they are stored in the case.

Furthermore, since the output fiber form of the fiber splitter is, for example, a single core wire with an outer diameter of 0.25 mm, in order to connect to the tape core wire, the tape core wire is separated into a single core wire at the site and connected together When connecting to the tape core, the single fiber of the fiber-type splitter fiber is placed in a ribbon shape and is not taped or taped on site, but is ribboned on the fusion holder on site. It must be fixed or connected to the tape core by either arranging the single fiber of the output fiber of the fiber-type splitter in the form of a ribbon and making it into a tape at the factory.

Therefore, in addition to cost or work time, there are problems such as requiring skills for the work of separating or tapering on a single core in the field.

The present invention solves the above problems and improves the efficiency of a single optical fiber.
The object of the present invention is to realize minimization and improve storage by adopting a structure in which a conventional waveguide type tap element is used and the output optical fiber form is composed of a combination of a single core wire and a tape core wire. It is to provide an ideal connection work time without requiring special skills at the time of connection.

In order to achieve the above-mentioned problem, the present invention has an unbalanced power branching ratio between the n output 1 port of the 1 × n branching waveguide type splitter and the other port of n−1. In a waveguide splitter in which the power branching ratio of the ports is balanced, the n-output optical fiber form is branched in the waveguide tap element, and an independent n-output 1 port is connected to one single core wire. another plurality of ports of n-1 that branches in the waveguide tap element is characterized by being constituted by connecting a plurality of optical fibers constituting the optical fiber ribbon.

In the unbalanced waveguide type splitter of the present invention, an optical fiber single-core wire is arranged in an unbalanced branch circuit of a waveguide type tap element, and a four-fiber optical fiber tape is arranged in a balanced branch circuit of a waveguide type tap element. The structure composed of a combination of a single core wire and a tape core wire achieves minimization, improves storage, and does not require special skills at the time of connection. Is possible.

Hereinafter, an embodiment of an unbalanced waveguide splitter according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is an internal structure diagram of an embodiment of an unbalanced waveguide splitter according to the present invention.
FIG. 1 is a structural diagram showing an embodiment of a 1 × 5 unbalanced waveguide splitter of the present invention in FIG. 1, wherein 1 is an optical fiber single core wire, 2 is an optical fiber tape core wire, 3 is a sealant, and 4 is a core wire. Fixing agent, 5 V-groove base, 6 optical fiber, 7 presser lid, 8 waveguide tap element, 9 case, 10 boot, 11 single-core protection pipe, 12 balanced branch circuit, 13 Is an unbalanced branch circuit.

Here, the optical fiber single fiber 1 may be a normal optical fiber, and the material, shape, and form thereof are not limited to those illustrated in the explanatory drawings.
Here, the optical fiber tape core 2 has four cores, but the optical fiber tape core 2 is a normal tape core in which optical fiber strands are arranged in a ribbon shape, and depending on the number of branches. The material, shape, and form are not limited to those illustrated in the explanatory diagram.

Further, the sealant 3, the core wire fixing agent 4, the V-groove base 5, the optical fiber 6, the presser lid 7, the waveguide type tap element 8, the case 9, the boot 10, and the single core wire protection pipe 11 are usually used for manufacturing a splitter. The materials, shapes, and forms used are not limited to those illustrated in the explanatory drawings.

Furthermore, the branch ratio between the unbalanced branch circuit 13 and the balanced branch circuit 12 of the waveguide tap element 8 and the number of branches of the balanced branch circuit may be selected according to the application, and are exemplified in the description. It is not limited to what was done.

1 (a) uses an optical fiber single core wire 1a, a V-groove base 5a, a presser lid 7a, a sealant 3a and a core wire fixing agent 4a for a generally processed waveguide tap element 8. The processed so-called 1FA is connected by a aligning device, and further, an optical fiber single core wire 1b, a 4-core optical fiber tape core wire 2, a V-groove base 5b, a presser lid 7b, a sealant 3b, and a core wire fixing agent 4b. The so-called 5FA used is prepared for processing and connected by a aligning device.

Here, the optical fiber single core wire 1b, the optical fiber single core wire 1b in the 5FA configured using the optical fiber tape core wire 2 of the four cores, the V groove base 5b, the presser lid 7b, the sealant 3b and the core wire fixing agent 4b. Are connected to the unbalanced branch circuit 13 of the waveguide type tap element 8, and the four-fiber optical fiber ribbon 2 is connected to the balanced branch circuits 12a, 12b, 12c and 12d of the waveguide type tap element 8. The structure is arranged in the V-groove of the groove base 5b.

FIG. 1B shows an external structure of an unbalanced waveguide splitter in which the unbalanced waveguide splitter shown in FIG. 1A is protected and accommodated by a case 9, a boot 10 and a single-core protection pipe 11. In the figure, the inside of the case 9 may be filled with a compound such as resin or oil, if necessary, and the core wire protection pipe 11 may be omitted if necessary. The ten materials, shapes, and forms are not limited to those illustrated in the explanatory drawings.

(A) It is an internal structure figure which showed one Embodiment of the 1 * 5 unbalanced waveguide type | mold splitter of this invention, (b) It is an external-structure figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Optical fiber single core wire 2 Optical fiber tape core wire 3a, 3b Sealant 4a, 4b Core wire fixing agent 5a, 5b V-groove base 6a, 6b Optical fiber 7a, 7b Holding lid 8 Waveguide type tap element 9 Case 10 Boot 11 Single core protection pipe 12a, 12b, 12c, 12d Balanced branch circuit 13 Unbalanced branch circuit

Claims (1)

A waveguide splitter in which the power branching ratio between the n output 1 port of the 1 × n branching waveguide splitter and the other ports of n−1 is unbalanced, and the power branching ratio of the other ports of n−1 is balanced. In
The n-output optical fiber form is branched in the waveguide tap element and the independent n output 1 port is connected to one single core wire, and the other n-1 branches in the waveguide tap element. unbalanced waveguide splitter, characterized in that it is constituted by connecting a plurality of optical fibers are a plurality of ports that constitute the optical fiber ribbon.

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