JPH04109204A - Ferrule of optical connector - Google Patents

Abstract

PURPOSE:To shorten the time for grinding and to speed up an outdoor connection work by projecting only the periphery of an optical fiber and reducing the part worked to a round shape. CONSTITUTION:A capillary 2 consisting of oxidized aluminum inserted with the ferrule 1 consisting of a metal is formed to the length at which the capillary projects from the ferrule 1. Only the front end part of this capillary 2 is polished to the round part 4. Then, the polishing area is reduced to <=1/6 the polishing area of the conventional ferrules. Further, the problem that the metallic material and oxidized aluminum of different values (varying in hardness) need be simultaneously ground is solved. The life of the grinding wheel of the polishing machine is prolonged in this way and the time for the outdoor connecting work of the optical connector is drastically shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connector for connecting optical communication fibers, and more particularly to the shape of the end face of a capillary or ferrule constituting the end face of the connector.

[Summary of the invention]

The periphery of the fiber at the connection end was made to protrude, and this part was polished into an R shape for selective contact.

[Conventional technology]

Conventionally, the tip of the ferrule applied to optical connectors is
As shown in Fig. 2, the entire tip including the capillary 2 is polished into a large 8 part 8, and the cross-sectional opening of the fiber (not shown) is exposed on the same plane at the apex of the radius. I was trying to make contact and connect.

[Problem to be solved by the invention]

According to the conventional method, for example, the entire middle 2,499 mm of the tip, that is, the metal material and the ceramic, must be polished at the same time, which takes time, and it is difficult to polish the grindstone of the polishing machine, especially for outdoor connection work. It had such a drawback that it became a bottleneck in speeding up the process.

[Means to solve problems]

In order to solve the above-mentioned problems, the present invention makes only the periphery of the optical fiber protrude to reduce the size of the rounded portion.

[Effect]

According to the above connector shape, an optical connector can be obtained in which the R-shaped processed portion is as small as one-sixth in area.

[Example〕 The present invention will be explained below based on examples.

(Embodiment 1) Fig. 1 is a cross-sectional view of a part of a ferrule applied to an optical connector showing one embodiment of the present invention. 1, and only the tip portion of this capillary 2 is polished into an R portion 4. According to this embodiment, the polishing area is 6
Furthermore, the problem of having to simultaneously polish metal materials and alumina materials with different values (different hardnesses) is also solved. The same effect can be obtained even if partially stabilized zirconia is used in place of alumina 2 in the gear pillar material.

(Embodiment 2) FIG. 3 is a sectional view of a ferrule showing another embodiment of the present invention, in which the capillary of the first embodiment is integrally constructed with an integral ferrule 6 made of partially stabilized zirconia. A protrusion 7 is provided at the end, and this protrusion 7 is polished into the R portion 4. According to this embodiment, the polishing area is reduced to one-sixth or less of the conventional polishing area, and the problem of having to simultaneously polish the foreign matter chambers of metal 1 and alumina 2 (which have different hardnesses) is also solved. Furthermore, compared to the first embodiment, the size of the protruding portion 7 can be made smaller. As mentioned above, Table 1 compares the life of the R-section polishing time grindstone of Example 1.2 and the conventional method.

Table 1: Relative comparison (Effects) with conventional technology set as 1 [Effects] As described above, according to the shape of the present invention, the shape processing of the R portion at the tip of the ferrule can be significantly shortened compared to the conventional method, and the life of the grinding wheel of the polishing machine can be extended. This has the effect of making it possible to significantly shorten the time required for connection work using optical connectors outdoors.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a dual-noise ferrule made of metal-ceramics, showing Embodiment 1 of the present invention, FIG. 2 is a sectional view of a conventional ferrule, and FIG. 3 is Embodiment 2 of the present invention. It is a cross-section V of a ceramic integrated ferrule showing. Book 15g173'KEffi I VI = (Type 1 h IL-L ('imd row G Fig. 1 Ferrule Capillary protrusion R section Fiber insertion part Integrated ferrule (Cross-sectional view of water ferrule Fig. 2 and above Applicant Seiko Electronic Industry Co., Ltd.

Claims (1)

[Claims] The connection end face of the capillary or ferrule that is fixedly inserted through the optical fiber in the center protrudes only around the optical fiber, only the protruding part is polished into an R shape, and the protruding parts are connected to each other. Optical connector ferrule.