JPH0784140A - Clamping method for multi-core optical fiber - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a method for clamping a multi-fiber optical fiber, which enables all the optical fibers to be clamped under the same conditions and has a good cutting end face and a cutting end face with little variation. In a clamping method in which a plurality of optical fibers arranged in parallel on a clamp base are pressed from above by a clamp presser via an elastic body, an optical fiber is provided between the elastic body and the clamp base on both sides of the optical fiber array. A multi-fiber optical fiber clamping method in which a spacer with a thickness approximately the same as the fiber diameter is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for clamping a multi-core optical fiber when cutting the multi-core optical fiber at one time.

[0002]

2. Description of the Related Art FIG. 3 is a schematic explanatory view of cutting an optical fiber. As shown in the drawing, the coating near the end of the optical fiber core wire 12 is removed to remove the optical fiber, and the optical fiber core wire 12 is clamped by the coating clamp 13 and the optical fiber 11
Clamp with the clamp 14. And the optical fiber 11
While applying axial tension to the optical fiber 11 at the cutting edge 15,
Make initial scratches and cut.

FIG. 2 is a cross-sectional view of an essential part of a conventional clamping method for a multi-core optical fiber when the optical fiber is cut as described above. As shown in the drawing, a plurality of optical fibers 1 exposed by removing the coating are arranged in parallel on a clamp base 2 made of aluminum, iron or the like, and an elastic body 4 made of rubber, plastic or the like 4 is arranged inward from above. A method is used in which the clamp retainer 3 equipped with is pressed and clamped.

[0004]

In the above-mentioned conventional clamping method, as is apparent from the drawings, the optical fibers 1'located at both ends are different from the other optical fibers 1 in the clamped state. For this reason, there is a problem that variations in the clamping force, twisting of the optical fiber itself, and the like occur, and a good cut end face cannot be obtained.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a method for clamping a multi-fiber optical fiber in which all the optical fibers can be clamped under the same conditions. A spacer having a thickness approximately the same as the optical fiber diameter is arranged between the elastic body and the clamp base on both sides of the fiber array.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of the essential part of an embodiment of a method for clamping a multi-fiber optical fiber according to the present invention. The same reference numerals as in FIG. 2 represent the same parts. As shown in the drawing,
A plurality of optical fibers 1 are arranged in parallel on the clamp base 2. Then, on both sides thereof, spacers 5 made of metal such as aluminum having a thickness D substantially equal to the optical fiber diameter are arranged. It is preferable that the distance between the spacer 5 and the optical fibers at both ends is substantially equal to the arrangement pinch of the optical fibers 1. From the upper side of the optical fibers 1 arranged in this way, the elastic body 4 is inwardly formed in the same manner as in the conventional case. Clamp and clamp with the clamp foot 3 attached.

In such a clamping method, the elastic deformation of the elastic body with respect to the optical fibers located at both ends is the same as that of the other optical fibers, and all the optical fibers 1 are clamped under the same condition. And a good cut end surface can be obtained.

[0008]

[Experimental Example] An optical fiber with 10 fibers was cut, and the end face angle (angle with respect to the vertical plane in the axial direction) was investigated. The results are shown in Fig. 4. The solid line shows the clamping method of the present invention, and the dotted line shows the conventional clamping method. As is clear from FIG. 4, in the conventional method, the optical fibers located at both ends could not obtain a good cut surface due to twisting or the like, but in the clamping method of the present invention, the optical fibers at both ends are not It was confirmed that a good cut end face similar to that of the optical fiber was obtained.

[0009]

As described above, according to the method for clamping a multi-fiber optical fiber of the present invention, all the optical fibers are clamped under the same conditions, so that the optical fibers themselves are not twisted, so that the cut end face is Is good, and a constant clamping force is applied to all the optical fibers, so that the tension is constant, and there is no variation in the cut end face.

[Brief description of drawings]

FIG. 1 is a transverse cross-sectional view of a main part of an embodiment of a method for clamping a multi-core optical fiber according to the present invention.

FIG. 2 is a transverse cross-sectional view of a main part of a conventional method for clamping a multi-fiber optical fiber.

FIG. 3 is a schematic explanatory diagram of optical fiber cutting.

FIG. 4 is a diagram showing a result of measuring an end face angle due to a difference in a clamping method of an optical fiber, a solid line shows a clamping method of the present invention, and a dotted line shows a conventional clamping method.

[Explanation of symbols]

 1 Optical fiber 2 Clamp base 3 Clamp foot 4 Elastic body 5 Spacer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Ogawa 2-3-25 Yumikicho, Nada-ku, Kobe City, Hyogo Prefecture

Claims (1)

[Claims] 1. A method of clamping a multi-fiber optical fiber, comprising: pressing a plurality of optical fibers arranged in parallel on a clamp base from above by a clamp retainer via an elastic body to clamp the optical fibers; 2. A method for clamping a multi-fiber optical fiber, characterized in that a spacer having a thickness approximately the same as the optical fiber diameter is arranged between the elastic body and the clamp base.