JPS61156104A - Structure of optical connector ferrule - Google Patents

Abstract

PURPOSE:To easily bond and fix and optical fiber to a ferrule by only inserting the optical fiber into the narrow hole of the ferrule and heating the ferule from the outside, by providing a groove filled with a brazing material to the narrow hole for inserting optical fiber of the ferrule in the axial direction. CONSTITUTION:At least one groove 12 is provided to the narrow hole 11 of a ferrule 10 in the axial direction and the groove 12 is filled with a metallic brazing material 13 of a special solder, etc., which can bond glass to stainless steel. When an optical fiber is inserted fiber is inserted into the hole 11 and the ferrule 10 is heated from the outside, the brazing material in the groove 12 is melted and, when the brazing material is cooled, the optical fiber can be bonded and fixed to the narrow hole 11 by means of the brazing material penetrating into the clearance between the hole 11 and optical fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical connector for connecting optical fibers, and particularly to its ferrule structure.

[Conventional technology]

FIG. 5 is a diagram showing a conventional optical connector. In this case, ferrules 3 and 4, each having an optical fiber 1.2 fixed thereto, are inserted into a sleeve 5 with their end surfaces abutting each other, and are secured by tightening with a cap nut 6.7.

[Problem that the invention seeks to solve]

In the structure described above, adhesive or solder is used to fix the optical fiber 1.2 to the ferrule 3.4. However, the former method requires preparation, stirring, and filling operations, requires a long curing time, and has the disadvantage that air bubbles are mixed into the fiber insertion portion, reducing the reliability of adhesion. In the latter case, as shown in FIG. 6, the ferrule 3 into which the optical fiber l is inserted in advance is immersed in a special solder 8.
Since the specific gravity of the solder is large, sufficient reliability can be expected if the structure is free from air bubbles and has good filling properties, but if the filling (the gap between the ferrule microhole and the outer circumference of the optical fiber) is small, This method has the disadvantage of causing incomplete filling, and also requires a device for performing solder dipping, both of which are inaccessible to on-site work.

[Means for solving problems]

The present invention provides an optical connector ferrule structure that solves the above-mentioned problems.The present invention provides an optical connector ferrule structure in which an optical fiber is precisely positioned and fixed at the center of the optical connector ferrule. The optical connector ferrule structure is characterized in that at least one groove is provided in the direction, and the liquid groove is filled with a metal brazing material for bonding an optical fiber to the ferrule.

[For production]

The optical connector ferrule structure described above has at least one groove filled with a metal brazing material in the longitudinal direction of the microhole into which the optical fiber is inserted, so that the optical fiber is inserted into the microhole and heated. As a result, the brazing material melts and penetrates into the gap between the microhole and the optical fiber, allowing the two to be easily adhesively fixed.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, in which a is a perspective view and b is an enlarged front view of section B in diagram a.

In this embodiment, as shown in FIG.
At least one groove 12 (three grooves in the figure) is provided in the axial direction of the liquid groove, and the liquid groove is filled with a metal brazing material 13 such as a special solder capable of bonding stainless steel and glass.

An example of the manufacturing method of this example is shown in FIG. In this method, as shown in FIG. As shown in Figure 2, after compressing the hole by pressing from three sides, the wire 22 is pulled out to form a microhole 23.

Moreover, FIG. 3 is a diagram showing another manufacturing method. In this method, an axial groove 31 is first provided around the microhole 30 into which the fiber is inserted, as shown in Figure 3a, and then an optical fiber or wire 32 coated with a release agent is inserted as shown in Figure 3. death,
The molten brazing filler metal 33 is infiltrated from the end face, cooled and solidified, and then the optical fiber or wire 32 is pulled out to form the optical fiber or wire 32 as shown in FIG. 3C.

This embodiment thus formed is used as shown in FIG. First, as shown in FIG. 4a, the optical fiber 41 is inserted into the ferrule 40 formed as described above, and then, as shown in FIG. After cooling, micropores 4
The optical fiber can be adhesively fixed to the microhole by the brazing material that has entered the gap between the optical fiber and the optical fiber.

〔Effect of the invention〕

As explained above, according to the present invention, by providing a groove filled with brazing material in the axial direction of the microhole of the ferrule for inserting the optical fiber, it is possible to easily insert the optical fiber and heat it from the outside. The optical fiber can be adhesively fixed to the ferrule, which is extremely advantageous for on-site work, and can be adhesively fixed with high reliability.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the optical connector ferrule structure of the present invention, FIGS. 2 and 3 are diagrams for explaining the method for creating the ferrule of the optical connector ferrule structure of the present invention, and FIG. Diagram explaining how to use it, No. 5
The figure is a sectional view for explaining a conventional optical connector, and FIG. 6 is a diagram for explaining a conventional method of fixing an optical fiber to a ferrule. In the figure, 10 indicates a ferrule, 11 indicates a microhole into which an optical fiber is inserted, 12 indicates a groove, and 13 indicates a brazing material.

Claims (1)

[Claims] 1. In the ferrule of an optical connector that accurately positions and fixes the optical fiber in the center, at least one groove is provided in the axial direction of the microhole into which the optical fiber is inserted, and the optical fiber is bonded to the ferrule in the groove. An optical connector ferrule structure characterized by being filled with a metal brazing material.