JPH04281408A - Optical fiber splicer - Google Patents

Abstract

PURPOSE:To prevent a glass part from curving owing to the shrinkage of the jacket part of an optical fiber. CONSTITUTION:The optical fiber splicer has an abutment connection fixation part 11 and jacket fixation parts 12a and 12b, a connection fixation substrate 13 of the abutment connection fixation part 11 is provided with a guide 14, and jacket fixation substrates 15a and 15b of the jacket fixation parts 12a and 12b are provided with guide holes at positions corresponding to the guide 14.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber splicer used to connect optical fibers together.

0002

2. Description of the Related Art Conventionally, this type of optical fiber splicer has a V-groove 22 formed in a substrate 21 as shown in FIG. The end face and the end face of the optical fiber 24 are abutted against each other, and the optical fiber 24 is fixed by being sandwiched between the holding plates 25, 26a, and 26b and the substrate 21. Here, presser plates 25 and 26
a and 26b are fixed to the substrate 21 with bolts 27, the holding plate 25 fixes the optical fiber abutting part, and the holding plates 26a and 26b fix the optical fiber coating part. There is also an optical fiber splicer that fixes only the abutting part of the optical fiber and does not hold the coating part.

0003

[Problem to be solved by the invention] An optical fiber has a core,
It consists of a glass part called a cladding and a covering part, and nylon is usually used for the covering. By the way, nylon shrinks at low temperatures, especially at temperatures below 0°C. In this conventional optical fiber splicer, since the nylon coating is strongly held, shrinkage of the nylon at low temperatures is suppressed, and the glass portion relatively protrudes. As a result, severe bending with a radius of curvature of several millimeters occurs in the glass portion, increasing connection (bending) loss and eventually causing wire breakage. In addition, with optical fiber splicers that do not hold the coating, torsional stress caused by bending caused by processing the extra length after splicing will be concentrated on the glass part at the end of the optical fiber splicer, which will reduce long-term reliability. There's a problem. An object of the present invention is to provide an optical fiber splicer that can reduce the adverse effects associated with shrinkage of the covering portion and the adverse effects associated with surplus length processing.

0004

[Means for Solving the Problems] According to the present invention, there is provided an optical fiber splicer for connecting two optical fibers to each other, wherein the end surfaces of the two optical fibers are aligned with each other so that the central axes of the optical fibers are aligned with each other. an abutting connection fixing part that abuts and fixes the two optical fibers, and two covering fixing parts that are located on both sides of the abutting connection fixing part and fix the covering parts of each of the two optical fibers, respectively. An optical fiber splicer is obtained in which the covering fixing portion is movable in a predetermined direction.

[0005]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view (partially transparent view) of an embodiment of the present invention. The optical fiber splicer of this embodiment is divided into a butt connection fixing section 11 and covering fixing sections 12a and 12b. Two guides 14 are provided from the butt connection fixing board 13 of the butt connection fixing part 11 in the left and right direction in the figure, and furthermore, two guides 14 are provided on the covering fixing boards 15a and 15b of the covering fixing parts 12a and 12b.
Guide holes 16 are provided at positions corresponding to 4, respectively. With such a structure, the covering fixing parts 12a and 12
b can move only in one direction along the guide 14 with respect to the abutting connection fixing part 11.

[0006] When connecting optical fibers, the covering fixing part 1
The optical fibers 17a and 12b are brought together until they come into contact with the connection fixing part 11 side, and the optical fibers 17a and 12b are inserted into the V-groove as in the conventional case.
7b, and fix the optical fiber abutment connection part and the coating part with the holding plate 18 using bolts on the abutment connection fixing board 13 and the coating fixing part boards 15a and 15b.

According to such a structure, even if the nylon of the coating part contracts at low temperatures, the coating fixing parts 12a and 12b move along the guide in the axial direction of the optical fiber, so that the glass part of the optical fiber is not damaged. There is no bending.

[0008]

Effects of the Invention As explained above, in the optical fiber splicer of the present invention, the part that fixes the left and right coating parts moves in the axial direction of the optical fiber due to the protrusion of the optical fiber as the nylon coating contracts. No increase in connection loss or disconnection. Furthermore, since the covering is also held by the holding plate, the influence of stress on the glass portion due to twisting caused by extra length processing can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of an optical fiber splicer of the present invention.

FIG. 2 is a perspective view of a conventional optical fiber splicer.

[Explanation of symbols]

11 Butt connection fixing part 12a, 12b Covering fixing part 13 Butt connection fixed board 14 Guide 15a, 15b Covered fixed board 16 Guide hole 17a, 17b Optical fiber 18 Holding plate

Claims (2)

[Claims] 1. An optical fiber splicer for connecting two optical fibers to each other, the abutment for fixing the end surfaces of the two optical fibers by abutting each other so that the central axes of the optical fibers coincide. An optical fiber splicer comprising a connection fixing part and two coating fixing parts located on both sides of the butt connection fixing part and fixing the coating parts of each of the two optical fibers, wherein the coating fixing part An optical fiber splicer characterized by being movable in a predetermined direction. 2. The butt connection fixing part has guide means extending in the extending direction of the two optical fibers, and the two covering fixing parts each have a guided part guided by the guide means. 2. The optical fiber splicer according to claim 1, wherein said two covering fixing parts are guided by said guide means and are movable only in one axis along said extending direction.