JPS60200210A - Photocoupler - Google Patents

Abstract

PURPOSE:To make a connection for demultiplexing and multiplexing, etc., easily by inserting plural optical fibers into insertion holes at both ends of the photocouplers at a time, and fitting an optical circuit block where a desired optical waveguide is formed in the fitting hole in the center. CONSTITUTION:The optical circuit block fitting hole 4 is formed in the center of the photocoupler body 3 and optical fiber insertion holes 5 are formed at both end parts. Plural optical fibers 8 are arranged laterally and inserted into an insertion hole 5 at a time through a connector 7 and the optical circuit block 7 where the desired optical waveguide is formed is fitted in the fitting hole 4 to attain optical coupling. A block 6 in a figure demultiplexes In2 into Out2 and Out3 and multiplexes and outputs In4 and In5. Consequently, said block 6 where the desired optical waveguide is formed is only fitted in the hole 4 to make a connection for demultiplexing, multiplexing, attenuation, etc., easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Summary) The present invention relates to an optical coupler that connects optical fibers and optical fibers, and particularly relates to an optical coupler that connects optical fibers and optical fibers. This invention relates to an optical coupler that can perform < connection, branch connection, attenuation connection, etc. to a container.

(Background Art) Fig. 1 and Fig. 2 show connection examples according to the conventional example, and the one shown in Fig. 1 is an example of two branches, and three optical fibers
+Q e O* has a connector (not shown)
are attached and connected to the turnout 1 via those connectors. Also, what is shown in Fig. 2 is what is called star fog, and in this example, there are six optical fibers ■1 + b...! 11% 01
*06 is attached and connected to the mixer 2 via a connector (not shown).

In such a case, the plurality of input signals are mixed in the mixer 2 and all input signals are connected to all receiving optical fibers O1.
, ...0. Evenly distributed.

As described above, when the number of optical fibers to be connected increases, the number of locations for attaching the connector increases, which takes time and effort.

In addition, in the case of star fog, all of the input signals enter the respective receiving optical fibers, which has the disadvantage that unnecessary data signals may be received, or conversely, the optical reception power of necessary data may be reduced. .

(Object of the Invention) The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to connect multiple optical 71 IPAs at once, to connect them at once, to connect them together, to connect them in a branching connection, to have a mixing connection, to have an attenuation connection. The purpose of the present invention is to provide an optical coupler that can easily perform the above operations.

(Disclosure of the Invention) The present invention will be described below based on Examples. FIG. 3 is a plan view showing the outline of the present invention, and FIG. 4 is a plan view showing the outline of the present invention.
It is a sectional view of Bf111. In the figure, 3 is a main body that has an optical circuit block fitting hole in the center and a plurality of optical fiber insertion holes 5 at both ends, and an optical circuit block 6, which will be described later, is fitted into the fitting hole 4. The insertion hole 5 is a rectangular parallelepiped recessed hole, and the insertion hole 5 communicates with the fitting hole 4 from both ends thereof, and is formed at a predetermined interval. Reference numeral 7 denotes an optical fiber connector, and a plurality of optical fibers 8 arranged side by side in a flat cord are attached to the connector 7, and the spacing between the optical fibers 8 is approximately the same as the spacing between the optical fiber insertion holes 5. It is fixed as shown in -. In addition, the optical fiber connector 7
The means for coupling the main body 3 to the main body 3 may be any known means, and in the embodiment described above, the protrusions 9 provided on the connector 7 are fitted into the recesses 1o provided at both ends of the main body 3, thereby fixing the connector.

FIG. 5 is a plan view showing an example of an optical circuit block that fits into the fitting hole 4, and the optical circuit block 6 includes various optical waveguides P! using a mask pattern on a photocurable resin. , P,
, P, are formed, and each optical waveguide P1. P2.
The input and output ends of Ps are formed at positions corresponding to the optical fiber insertion holes 5. In this example, there are five input/output end positions (Inl to In in the figure).

0ut1~Out @), and in such a case,
It is assumed that five optical fiber insertion holes 5 are formed in each end of the main body 3.

In this optical circuit block 6, when Inl to In5 are input sides and Out 1 to 0utB are output sides, ■ Town and Out 1 are connected, Ink is Out,, Out
t, and In4 and Ing are mixed and O
This circuit outputs signals to ut, , and 0utIl, respectively.

Also, for example, if you want to connect In4 to Out S,
Conventionally, as mentioned above, each optical fiber had a connector, so as shown in Figure 6, 1cout4 and OuL
I had to replace 6. In such a case, it is fine if the optical fibers are separated one by one, but as mentioned above, the optical fibers 8 with flat cords can be connected to one connector 7.
If you connect them all at once, it will not be possible to replace them. Therefore, by making the mixing length e of the crossed optical waveguide Pl shown in FIG. 5 as short as possible as shown in FIG.
The signal light travels almost straight, In, and Out 11, Ins.
This means that and Out4 are connected.

Furthermore, in the connection between In1 and Out 1 in FIG. 5, if the amount of received light is too large, the linear optical waveguide P1
By narrowing the line width, it is possible to increase packing loss and loss (loss caused by the difference between the cross-sectional shape of the optical fiber and the optical waveguide) on the input side, and to achieve an appropriate light reception level. .

(Effects of the Invention) As described above, the optical coupler according to the present invention has an optical circuit block fitting hole in the center, and both ends communicate with the fitting hole from each end and are arranged at a predetermined interval. The coupler body has a plurality of optical fiber insertion holes provided therein, and an input/output end that fits into the fitting hole and is located at a position corresponding to the insertion hole. It consists of an optical circuit block connected by optical waveguides and an optical fiber connector that inserts and fixes multiple optical fibers at the same time into the multiple insertion holes, so multiple optical fibers can be connected at once, and There is an effect that branch connections, mixing connections, attenuation connections, etc. can be easily made by simply fitting an optical circuit block containing a desired optical waveguide into a fitting hole.

[Brief explanation of drawings]

1 and 2 are simplified diagrams showing the conventional example, FIG. 3 is a plan view showing the outline of the present invention, and FIG. 4 is A-B in FIG. 3.
5 is a plan view showing an example of an optical circuit block used in the present invention, FIG. 6 is a simplified diagram showing a conventional example, and FIG. 7 is a diagram for explaining the cross-connection according to the present invention. be. 3... Main body, 4... Fitting hole, 5... Optical fiber insertion hole, 6... Optical circuit block, 7... Connector, 8
...Optical fiber. Patent applicant Matsushita Electric Works Co., Ltd. Representative patent attorney Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] +11 The optical circuit block has a fitting hole in the center, and a plurality of light beams 71 (through-holes) connected to the fitting hole from both ends at both ends and arranged in parallel at a predetermined interval. an optical circuit block that fits into the fitting hole and has input and output ends at positions corresponding to the insertion holes, and connects the input and output ends with a desired optical waveguide. and an optical fiber connector for inserting and fixing a plurality of optical fibers l< into the plurality of insertion holes at once.