Optical fiber protection structure and method for producing optical element

Abstract

The present invention provides: an optical fiber protection structure which is capable of reducing deterioration of the optical characteristics of an optical fiber in a high temperature environment; and a method for producing an optical element, which uses this optical fiber protection structure. An optical combiner structure (1) protects strand exposed parts (17, 18) in which strands (15, 16) areexposed from claddings (13, 14) of optical fibers. The optical combiner structure (1) is provided with: a fiber containing part (20) that is provided with a fiber containing groove (21) which internally contains the strand exposed parts (17, 18); fixation resins (40A, 40B) that are filled into the fiber containing groove (21) so as to affix parts of the claddings (13, 14) within the fiber containing groove (21); and sealing resins (42A, 42B) that seal the spaces between the strands (15, 16) and the claddings (13, 14) at the ends of the strand exposed parts (17, 18). The sealing resins (42A, 42B) are formed at a distance from the inner surface of the fiber containing groove (21).

Description

technical field [0001] The present invention relates to an optical fiber protection structure and a method of manufacturing an optical element, and more particularly to an optical fiber protection structure in which at least a part of an optical fiber is accommodated, and an optical combination structure using the optical fiber protection structure. Background technique [0002] For example, when connecting optical fibers, it is often necessary to remove the coating of the optical fiber and fuse the plain wires of the optical fiber to connect. , may break. In order to prevent such a problem, for example, the optical fiber protection structure disclosed in Patent Document 1 may be applied. figure 1 It is a plan view showing an optical combination structure 500 to which such a conventional optical fiber protection structure is applied. Such as figure 1 As shown, according to the optical combined path structure 500, the fused portion 519 of the optical fibers 511, 512 and th...

AI Technical Summary

Problems solved by technology

However, there are currently few materials that have both physical properties of low cure shrinkage and low refractive index. Therefore, in order to prevent the light guided by the optical fibers 611 and 612 from leaking in the structure 600, the resin is made of a low refractive index material. For 640A and 640B, it is difficult to use materials with low cure shrinkage

In other words, in the optical combination structure 600, it is difficult to solve both the problems of the generation of micro-vents and the prevention of light leakage. From this point, the problem of deterioration of the optical characteristics of the optical fiber also occurs.

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