JPH04366804A - two-way optical outlet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-way optical outlet with an optical plug insertion type used for connecting various optical terminal devices in the middle of an optical transmission line.

0002

2. Description of the Related Art In the case of the optical outlet and optical plug disclosed in Japanese Patent Application Laid-Open No. 61-267709, as shown in FIG. A coupling optical plug 3 can be inserted therein, and a reflection mirror 4 is installed inside the optical plug.
and an intermediate input/output fiber 5 are built in. Necessary optical terminal equipment 6 was connected using these optical outlets and optical plugs.

However, the present optical outlet and optical plug can only be applied to a unidirectional optical transmission system, and cannot be bypassed in a bidirectional optical transmission system.

0004

[Problem to be Solved by the Invention] In the case of the optical outlet and optical plug shown in FIG. There is a problem in terms of dimensional accuracy in that the plug 3 must be moved by a distance that allows the plug 3 to be inserted. Furthermore, the optical plug 3 also requires two or more reflecting mirrors 4 to be provided inside, which poses a problem in that the structure becomes quite complex.

[0005] Furthermore, the present optical outlet and optical plug are for unidirectional optical transmission, and when applied to bidirectional optical transmission, the structure becomes more complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bidirectional optical outlet that can reduce the amount of movement of input/output fibers and can switch optical paths in response to insertion of an optical plug.

[0007]

[Means for Solving the Problems] The present invention provides a bidirectional optical outlet that solves the above-mentioned problems, and the optical outlet has four input optical fiber end faces and four output optical fiber end faces. The gist is a configuration in which optical fiber end face movable parts are arranged facing each other, and the optical fiber end face movable parts slide in response to an optical plug insertion operation to switch the bidirectional optical path.

[0008]

[Function] According to this configuration, since the input and output optical fiber end faces are arranged opposite each other, the amount of movement of the optical fiber end face movable part required for switching the optical path can be reduced, so the structure is simple and the optical plug By simply inserting the , the optical path can be switched in response to the operation.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an embodiment of the optical outlet according to the present invention, and FIG. 3 shows a diagram when an optical plug is inserted into the optical outlet.

The outlet 7 has a four-input optical fiber 9 and a four-output optical fiber 10 mounted on two optical fiber end face movable parts 11 and 12 at equal intervals in an outlet box 8, and facing each other. It has an arranged configuration. At least one of these two optical fiber end face movable parts 11 and 12 is movable, and is in a state where the input and output optical fiber end faces are directly optically coupled at the closest position. Furthermore, the movable optical fiber end face movable part 11
, 12 are connected to a slide mechanism 15 consisting of one or more connecting bars 13 and an operating pin 14, and are arranged to face the optical plug insertion opening 16. Further, a spring 18 is suspended between the optical fiber end face movable portion 11 on the opposite side of the connection bar 13 and the inner wall 17 of the outlet box, and the spring force is used to maintain the optimum position for switching the bidirectional optical path. is given great power. Also,
The other two ends of each of the four-input optical fiber 9 and the four-output optical fiber 10 are connected to an inserted optical plug 20 by an adapter using a ferrule 19 or the like.

In this configuration, first, in a normal loop transmission state, the two-core trunk fibers 21 are directly optically coupled to each other at their closest positions, as shown in FIG. At that time, when it is necessary to connect a certain optical terminal device, when the optical plug 20 is inserted from the optical plug insertion port 16 as shown in FIG.
By sliding the optical fiber end face movable part 11 and the end face of the optical fiber mounted thereon through the connection bar 13 while pressing the spring 18, the transmitted light is taken out from the two-core trunk fiber 21 and transmitted to the two-core trunk fiber 21. This creates a so-called bypass state in which light is sent back, allowing bypass in a bidirectional transmission system.

Furthermore, when the optical plug 20 is removed, the optical fiber end face movable portion 11 returns to its original closest position due to the pushing force of the spring 18, and the input and output optical fibers 9 and 10 of the two-core trunk fiber 21 are directly connected. state and returns to the original bidirectional loop transmission state.

[0013]

[Effects of the Invention] By arranging the input and output optical fiber end faces facing each other, the amount of movement of the movable part of the optical fiber end face required for switching the optical path can be reduced, and furthermore, the operation can be performed simply by inserting an optical plug. Since it is possible to switch the bidirectional optical path in response, it is extremely effective when it is desired to easily connect optical terminal equipment or the like when necessary.

[Brief explanation of drawings]

[Fig. 1] A plan view showing a conventional optical outlet.

FIG. 2 is a plan view of an embodiment of a two-way optical outlet according to the present invention;

FIG. 3 is a plan view showing a state when an optical plug is inserted into the two-way optical outlet of FIG. 2;

[Explanation of symbols]

9...Four input optical fiber, 10...Four output optical fiber, 11
, 12... Optical fiber end face movable part, 13... Connection bar, 14
...Operating pin, 15...Slide mechanism, 18...Spring,
19...ferrule.

Claims (3)

[Claims] Claim 1: An input optical fiber end face and an output optical fiber end face are arranged opposite each other so that at least one of them can slide, and the optical fiber end face is comprised of a movable part capable of optical coupling sufficient for bypassing. A two-way optical outlet featuring 2. The bidirectional optical outlet according to claim 1, wherein a moving mechanism responsive to insertion of an optical plug is connected to the optical fiber end face movable portion. 3. The bidirectional optical outlet according to claim 1, which is connected to enable bypass in the bidirectional optical transmission line.