JPS6078410A - Adjustment type optical connector - Google Patents

Abstract

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

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an adjustable optical connector, and more particularly to an optical connector that can adjust the rotation of the plane of polarization of a constant polarization optical fiber.

Prior Art and Problems FIGS. 1 and 2 show a conventional adjustable optical connector. In the figure, there is a constant polarization optical fiber 3.4 inside.
Ferrules 5.6 are aligned and fixed at the ends of the two optical fiber cables 1.2, respectively. It is supported by the supporting material 7. Rotation adjustment knobs 8 and 9 are attached to the ferrule 5°6. Therefore, by turning these rotation adjustment knobs 8.9, the planes of polarization of the optical fibers 3.4 can be matched. However, the ferrule 5.6 is
The optical fiber 3
．． There was a risk that the polarization plane of 4 would shift.

Purpose of the Invention In view of the problems of the prior art described above, an object of the present invention is to provide an adjustable optical connector that allows adjustment of the plane of polarization of a constant polarization type optical fiber and locks a ferrule at an optimal position. With the goal.

According to the present invention, the above object is to provide a pair of ferrules each fixed to an end of a constant polarization type optical fiber, and supporting the pair of ferrules so that the end surfaces of the optical fibers abut each other. and a rotation adjustment plate fixed to at least one of the pair of ferrules, wherein the rotation adjustment plate is rotatably supported with respect to the support member together with the optical fiber, A number of positioning holes are arranged in the rotation adjustment plate along a circumference concentric with the rotation center of the rotation adjustment plate at a fixed angle pinch, and a positioning pin that can be inserted into the positioning holes is provided in the bracket provided on the support member. This is achieved by an adjustable optical connector characterized by a support.

Examples of the invention Hereinafter, the present invention will be described in detail with reference to the drawings.

3 to 7 show an embodiment of the present invention. First of all, referring to FIGS. 3 and 4, an optical fiber 11.
Ferrules 15 and 16 are aligned and fixed at the ends of the optical fibers 1 and 12, respectively.
3.14 are supported by the support member 17 so that their end faces coaxially abut each other. The support member 17 is a frame 18
and a cylindrical sleeve 19 fixed to the frame 18 with screws or the like, and the cylindrical tips of the ferrules 15 and 16 fit precisely into the sleeve 19. One ferrule 15 is rotatable with respect to the frame 18 and sleeve 19, and the other ferrule 16 is not rotatable with respect to the frame 18 by an engagement pin or the like. A rotation adjustment plate 20 is provided on the ferrule 15 which is rotatable with respect to the support member 17. The protrusion 21 provided on the rotation adjustment plate 20 engages with the axial groove 22 formed on the ferrule 15, and the rotation adjustment plate 20 and the ferrule 1 are connected to each other.
Relative rotation with 5 is regulated. Therefore, by rotating the rotation adjusting plate 20, the ferrule 15 can be rotated together with the optical fiber 13.

As shown in FIG. 7, a large number of positioning holes 23 are arranged in the rotation adjustment plate 20 at constant angular pitches along a circumference concentric with the rotation center of the rotation adjustment plate 20. As shown in FIG. Here, the positioning hole 23 is arranged in the rotation adjustment plate 20 so as to form three holes 24, 25, and 26 concentric with the rotation center of the rotation adjustment plate 20.
is placed on top. The angular pitch θ between the positioning holes 23 in each dog death 24, 25, 26 is the same (θ = 18°)
In addition, the positioning holes 23 at each dog death 24, 25, and 26 have the angle pitch 1,000 as the number of dog deaths (in this case, 3
) are sequentially shifted in the circumferential direction by an angle ψ (ψ=θ/3) equal to the value divided by .

On the other hand, as shown in FIGS. 3 to 6, the frame 18
is provided with a bracket 27, which is provided with positioning pins 28, 29, 30 in a number equal to the number of dead dogs in the positioning holes 23. Each positioning pin 28, 29.30 can be fitted into and removed from the positioning hole 23 of each dog death 24, 25.26, and each positioning pin 28, 29.
, 32° 33 in the direction of fitting into the positioning hole 23. As shown in FIG.
, 29, and 30 are arranged along the radial direction of the rotation adjustment plate 20, so that two or three positioning pins do not fit into the positioning hole 23 at the same time.

In the adjustable optical connector with the above configuration, the rotation adjustment plate 2
0 can be turned to match the polarization planes of the optical fibers 13 and 14. Moreover, by fitting either of the positioning pins 28, 29, or 30 into the positioning hole 23, the rotation adjustment plate 20 and the ferrule 15 can be fixed to the frame 18 of the support member 17 in a non-rotatable manner. In the adjustable optical connector with the above configuration, the rotation adjustment plate 20
can be rotated in 6° increments, so the polarization plane of the optical fibers 13 and 14 can be adjusted with almost sufficient accuracy. Can allow small angle adjustments.

FIG. 8 shows another embodiment of the invention.

In the figures, the same reference numerals are given to the same components as in the above embodiment.

Here, the support member 17 includes a substantially cylindrical sleeve 171 and two cap nuts 172 and 173,
The camp nuts '172 and 173 can be screwed into threaded portions formed on the outer periphery of both ends of the sleeve 171, respectively. One ferrule 15 is rotatable relative to the sleeve 171 and one of the gears 172, but is pushed toward the other ferrule 16 by a spring 174. The other ferrule 16 is prevented from rotating with respect to the other camp nut 173 by an engaging protrusion 175. A rotation adjustment plate 20 is attached to the ferrule 15 in a non-rotatable manner. A placket 27 is fixed to the cap nut 172, and the bracket 27 is provided with three positioning pins 28, 29, and 30. The configurations of the rotation adjustment plate 2o and the positioning pins 2B, 29.30 are the same as in the above embodiment. Therefore, in this embodiment as well, the same effects as in the above embodiment can be obtained.

Although two embodiments have been described above, the present invention is not limited only to the aspects of the embodiments described above; for example, various changes may be made to the form of the support member and ferrule, and rotation adjustment may be made. You can choose from a variety of options, such as the positioning holes provided in the board, the long sword, and the angle pinch of the holes.

Effects of the Invention As is clear from the above description, the present invention includes a pair of ferrules each fixed to an end of a constant polarization type optical fiber, and a pair of ferrules fixed to each end of a constant polarization type optical fiber, and a pair of ferrules fixed to each end of a polarization constant optical fiber. An adjustable light comprising a support member that supports a ferrule, and a rotation adjustment plate fixed to at least one of the pair of ferrules, wherein the rotation adjustment plate is rotatably supported with respect to the support member together with the optical fiber. In the connector, a large number of positioning holes are arranged in the rotation adjustment plate at a constant angular pitch along a circumference concentric with the rotation center of the rotation adjustment plate, and the bracket provided on the support member can be fitted into and removed from the positioning holes. The adjustable optical connector is characterized by supporting positioning pins that allow the polarization plane of the constant polarization type optical fiber to be adjusted and the ferrule can be locked at the optimal position. can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional plan view showing the structure of a conventional adjustable optical connector, Fig. 2 is a perspective view of the connector shown in Fig. 1, and Fig. 3 is an adjustable optical connector showing an embodiment of the present invention. 4 is a perspective view of the connector shown in FIG. 3, FIG. 5 is a partially enlarged schematic right side view of the connector shown in FIG. 3, and FIG.
The figure is a cross-sectional view taken along the line Vl-VI in Fig. 5.
This figure is a front view of the rotation adjustment plate in the connector shown in FIG. 3, and FIG. 8 is a front view in partial longitudinal section showing another embodiment of the present invention. In the figure, 11.12 is an optical fiber cable, 13.
14 is a constant polarization type optical fiber, 15.46 is a ferrule,
17 is a support member, 20 is a rotation adjustment plate, 23 is a positioning hole, 27 is a placket, 28, 29, 30 are positioning pins, and 31, 32, 33 are springs. Figure 1 Figure 2 Figure 3 Figure 4 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1. A pair of ferrules each fixed to an end of a constant polarization type optical fiber, and a support member that supports the pair of ferrules so that the end surfaces of the front light distribution fiber abut each other. and a rotation adjustment plate fixed to at least one of the pair of ferrules, wherein the rotation adjustment plate is rotatably supported with respect to the support member together with the optical fiber. A large number of positioning holes are arranged in the plate at a constant angular pitch along a circumference concentric with the rotation center of the rotation adjustment plate, and a bracket provided on the support member supports positioning pins that can be fitted into and removed from the positioning holes. 2. In the adjustable optical connector according to claim 1, the positioning hole is configured to form a plurality of holes concentric with the center of rotation of the rotation adjustment plate. are arranged at the same angular pitch along a plurality of circumferences concentric with the rotation center of the rotation adjustment plate, and the positioning holes for each dog death are arranged at an angle equal to the value obtained by dividing the angle pinch by the number of dog deaths. The adjustment type is characterized in that the positioning pins are sequentially shifted in the circumferential direction, and the positioning pins are arranged on the bracket in a number equal to the number of pins in the positioning holes along the radial direction of the rotation adjustment plate. optical connector. 3. The adjustable optical connector according to claim 1 or 2, wherein the positioning pin is biased by a spring in the direction of fitting into the positioning hole. .