JP4097113B2 - Fiber optic connectors and composite structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical fiber connector for connecting an optical fiber embedded in a composite material structure to an optical fiber outside the composite material structure.
[0002]
[Prior art]
In recent years, research has been actively conducted on a health monitoring technique in which an optical fiber sensor is embedded in a structure such as an aircraft body to detect the distortion and temperature of the structure and monitor the soundness of the structure. In addition, composite materials are often used as structural materials for applying health monitoring technology, and laminate sheets of fiber reinforced composite materials using carbon fibers or aramid fibers as reinforcing materials are often used. Therefore, in the case of this health monitoring technology, an important technical issue is how to draw out the optical fiber embedded in the composite material structure to the outside of the composite material structure and connect it to the measuring device. Several connection methods have been proposed.
[0003]
One example thereof is described in US Pat. No. 5,299,273. FIG. 12 shows a conventional optical fiber connector described in this publication, and FIG. 13 shows a state in which the conventional optical fiber connector is aligned and fixed to a composite material structure using a dedicated jig. FIG. 12 and 13, reference numeral 110 denotes a composite material structure in which an optical fiber is embedded, 112 denotes an optical fiber embedded in the composite material structure 110, and 122 denotes an optical fiber connector.
[0004]
Such an optical fiber connector is connected by the following method. After cutting the end portion of the composite material structure 110 in which the optical fiber 112 is embedded, the end surface of the connection end portion of the optical fiber 112 is optically polished, and then the optical fiber 112 and the optical fiber connector 122 are Are fixed as shown in FIG. 12, and the optical fiber connector 122 is attached to the composite material structure 110. In this way, the optical fiber 112 embedded in the composite material structure 110 can be connected to an optical fiber outside the composite material structure 110 via the optical fiber connector 122.
[0005]
[Problems to be solved by the invention]
However, in a conventional optical fiber connector 122 for connecting an optical fiber 112 embedded in the composite structure 110 to an optical fiber external to the composite structure 110, the optical fiber 112 exposed at the end of the composite structure 110 It is necessary to optically polish the end face 126 of the connecting end portion, and a dedicated jig 128 for accurately aligning the optical fiber 112 and the optical fiber connector 122 is required. Therefore, such an optical fiber connection method is a very precise operation, requires a lot of labor, and is difficult to say when it is intended to manufacture an actual composite material structure. .
[0006]
The present invention has been made to solve the above-described problems, and an optical fiber for easily connecting an optical fiber embedded in a composite material structure to an optical fiber outside the composite material structure. An object is to provide a connector.
[0007]
[Means for Solving the Problems]
An optical fiber connector according to the present invention is an optical fiber connector for connecting a connection end portion of an optical fiber embedded in a composite material structure and a connection end portion of an optical fiber outside the composite material structure. A connection substrate having a cross-sectional V-shaped groove for placing the connection end of the optical fiber embedded in the structure and the connection end of the optical fiber outside the composite material structure in abutting state, and the connection substrate A fixing mechanism for fixing the connection substrate and the two connection end portions so as to press the both connection end portions onto the V-shaped groove of the cross section and hold the both connection end portions in abutting state. A guide component for guiding the optical fiber embedded in the composite material structure to the connection board and reinforcing and holding the connection board in strength. Have The fixing mechanism is Embedded in the composite material structure Side Fix optical fiber did portion But Embeddable in the composite structure Has been It is characterized by this.
[0009]
In this case, the guide component and the connection board may be integrated.
[0010]
Moreover, it is preferable that the said guide component and the said connection board shall have a hole for inject | pouring an adhesive agent into the butt | matching part of the both connection end parts of the said optical fiber.
[0011]
Also, An optical fiber connector according to the present invention is an optical fiber connector for connecting a connection end portion of an optical fiber embedded in a composite material structure and a connection end portion of an optical fiber outside the composite material structure. A connection substrate having a cross-sectional V-shaped groove for placing the connection end of the optical fiber embedded in the structure and the connection end of the optical fiber outside the composite material structure in abutting state, and the connection substrate A fixing mechanism for fixing the connection substrate and the two connection end portions so as to press the both connection end portions onto the V-shaped groove of the cross section and hold the both connection end portions in abutting state; The fixing mechanism is The portion where the optical fiber on the side embedded in the composite material structure is fixed can be embedded in the composite material structure, The optical fiber outside the composite material structure is detachably pressed against the V-shaped groove of the connection substrate by a sliding mechanism that slides a sliding fixing bracket in the axial direction of the optical fiber. It is characterized by .
[0012]
Moreover, the composite material structure of the present invention is characterized in that an optical fiber is embedded using any one of the optical fiber connectors described above.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
First, the first embodiment will be described with reference to FIGS. Here, FIG. 1 is an exploded perspective view of the optical fiber connector according to the first embodiment, and FIG. 2 is a cross-sectional view of the optical fiber connector according to the first embodiment in a state of being embedded in a composite material structure. 3 is a view taken in the direction of arrow A in FIG.
[0014]
1 to 3, reference numeral 1 denotes a composite material structure, 2 denotes an optical fiber embedded in the composite material structure 1, and 3 denotes an optical fiber outside the composite material structure 1. The diameter is the same, and those having a diameter of 40 μm to 250 μm are usually used. Reference numeral 4 denotes a flat connection substrate for connecting the end faces of the optical fiber 2 and the optical fiber 3 together. The connection substrate 4 is made of a material capable of precision processing such as ceramics or glass, and has a V-shaped cross section. Has grooves on the surface.
[0015]
Reference numeral 5 denotes a fixing bracket for pressing and fixing the optical fiber 2 and the optical fiber 3 to the connection substrate 4. The central portion is formed on a flat plate, but has a structure that is bent into a cross-sectional gate shape on both sides thereof. . And the tip side half of this both-side piece comprises the bending piece parts 5a and 5b bent when fixing the optical fibers 2 and 3 to the connection board | substrate 4 so that it may mention later. Moreover, since these bending piece parts 5a and 5b are isolate | separated in the center part, they can be bent separately, respectively.
[0016]
6 is a cushioning material disposed between the fixture 5 and the optical fibers 2 and 3, for example, thermally and chemically stable like silicon rubber, and without damaging the optical fibers 2 and 3. Moreover, a plate-like material having an appropriate softness is used for fixing with a sufficient force. In the optical fiber connector according to the first embodiment, the above-described fixing bracket and buffer material 6 constitute a fixing mechanism for fixing the optical fibers 2 and 3 to the connection substrate 4.
[0017]
In embedding the optical fiber 2 in the composite material structure 1, the following procedure is performed. First, the optical fiber 2 is placed along the V-shaped groove of the connection substrate 4 and the buffer material 6 is placed thereon. Then, the fixing bracket 5 is covered, and the bent piece portion 5a of the fixing bracket 5 is bent to elastically press the buffer member 6. In a state where pressure is applied and the optical fiber 2 is pressed against the connection substrate 4, the connection substrate 4, the optical fiber 2, and the buffer material 6 are fixed to each other (see FIG. 3). In this state, the connection end portion of the optical fiber 2 comes to the position of the bent piece portion 5b of the fixing bracket 5, and the optical fiber 2 side portion of this optical fiber connector is formed into the composite material structure 1 as shown in FIG. The part on the side where the optical fiber 3 is embedded is fixed to the outside of the composite material structure 1. After that, when connecting the optical fiber 3 outside the composite material structure 1, the connection end of the optical fiber 3 is inserted between the connection substrate 4 and the buffer material 6, and the V-shaped groove on the surface of the connection substrate 4 is inserted. The end faces of both connection end portions of the optical fiber 2 and the optical fiber 3 are butted together, and the bent piece 5b is bent (see FIG. 3), and the optical fiber 3 is pressed against the connection substrate 4 via the buffer material 6. Then, the optical fiber 2 and the optical fiber 3 are fixed so as to maintain the attached state.
[0018]
According to the optical fiber connector as described above, the connection end portion of the optical fiber 2 and the optical fiber 3 is pressed into the V-shaped groove of the connection substrate 4 via the buffer material 6 in a state where the end faces are butted together. By doing so, the end faces of both connection end portions are abutted with high precision, so that accurate connection can be realized without axial alignment of the optical fibers. Further, if the connection ends of the optical fiber 2 and the optical fiber 3 are cut in advance with a dedicated instrument such as a fiber cleaver, it is not necessary to perform an operation such as optical polishing, so a large number of optical fibers 2 are embedded. Even in such a case, the optical fibers 2 and 3 can be efficiently connected. Further, since the optical fibers 2 and 3 are pressed against the connection substrate 4 through the buffer material 6, the optical fibers 2 and 3 are not damaged, and the manufacturing accuracy of the fixing metal 5 does not need to be so severe. .
[0019]
Embodiment 2. FIG.
Next, the second embodiment will be described with reference to FIGS. 4 is an exploded perspective view of the optical fiber connector according to the second embodiment, and FIG. 5 is a cross-sectional view of the optical fiber connector according to the second embodiment in a state of being embedded in a composite material structure. 4 and 5, the same elements as those of the first embodiment are denoted by the same reference numerals, and the description thereof is simplified.
[0020]
In the second embodiment, the case where the optical fiber 2 is led out in a direction different from the arrangement direction of the optical fiber 2 inside the composite material structure 1, for example, in a right angle direction and connected to the optical fiber 3 outside the composite material structure 1 is taken as an example. However, in such a case, in order to improve the strength of the optical fiber connector, a guide component 17 described later is used as a strength member.
[0021]
4 and 5, reference numeral 17 denotes a guide component that guides the optical fiber 2 to the outside of the composite material structure 1 and reinforces and holds the connection substrate 14, and places the optical fiber 2 along the surface to the connection substrate 14. Has a groove for guiding. In addition, if this groove | channel can fix the optical fiber 2 stably, it is not necessary to ask | require the cross-sectional shape in particular. The material of the guide component 17 may be anything as long as it can withstand the heat and solvent applied when molding the composite material structure 1 such as metal or plastic. Note that the guide component 17 according to the second embodiment bends the optical fiber 2 at a right angle and guides it to the outside of the composite material structure 1, but this angle shows an example, which is an acute angle or an obtuse angle. Even in the case of such an angle, the idea of the second embodiment can be applied.
[0022]
Reference numeral 14 denotes a flat connection board similar to that of the first embodiment, but is attached to a flat plate portion protruding from the composite material structure 1 in the guide component 17 and is therefore shorter than that of the first embodiment. Also good. Reference numeral 15 is the same as the fixture 5 in the first embodiment, and this fixture 5 is bent at a right angle with a large radius of curvature at a flat plate portion at the center. Reference numeral 16 denotes a shock-absorbing material molded in a substantially L shape by using the same material as that of the shock-absorbing material 6 in the first embodiment.
[0023]
Then, when the optical fiber 2 is embedded in the composite material structure 1, the following procedure is performed. First, the connection substrate 14 is fixed on the guide component 17 as shown in FIG. Next, the optical fiber 2 is placed along the groove of the guide component 17, and the connection end portion of the optical fiber 2 is guided onto the V-shaped groove on the surface of the connection substrate 14 as in the first embodiment. Thereafter, similarly to the case of the first embodiment, the buffer material 16 is placed, the fixing metal 15 is covered, and the fixing metal 15 is bent so as to wrap the buffer material 16, the optical fiber 2, the connection substrate 14, and the guide component 17. The piece 15a is bent. By doing so, an elastic pressing force is applied to the buffer material 16, and the optical fiber 2 is pressed against the connection substrate 14 and fixed. At this time, the connection end portion of the optical fiber 2 enters the V-shaped groove of the connection substrate 14, and the bent piece portion 15 of the fixing bracket 15. b I am at the position. In this state, the portion of the optical fiber connector on the optical fiber 3 side protrudes from the composite material structure 1 in the vertical direction, and the portion of the optical fiber connector on the optical fiber 2 side is embedded in the composite material structure 1 (see FIG. 5). After that, when connecting the optical fiber 3 outside the composite material structure 1 to this optical fiber connector, the connecting end of the optical fiber 3 outside the composite material structure 1 is inserted between the connection substrate 14 and the buffer material 16. The end faces of the connection end portions of the optical fiber 2 and the optical fiber 3 are brought into contact with each other in the V-shaped groove of the connection substrate 14, the bent piece portion 15 b of the fixing bracket 15 is bent, and an elastic pressing force is applied to the buffer material 16. Then, the optical fiber 3 is pressed against the connection substrate 14 and the optical fiber 3 is fixed to the optical fiber 2 in a butted state.
[0024]
Since the second embodiment is configured as described above, the same effect as that of the first embodiment can be obtained, and at the same time, the optical fiber can be taken out from the surface of the composite material structure 1 at a free angle. Without cutting the optical fiber, the connecting end portion of the composite material structure 1 can be freely cut to adjust the shape.
[0025]
Embodiment 3 FIG.
Next, Embodiment 3 will be described with reference to FIGS. FIG. 6 is an exploded perspective view of the optical fiber connector according to the third embodiment, and FIG. 7 is a cross-sectional view of the optical fiber connector according to the third embodiment in a state embedded in a composite material structure. 6 and 7, the same elements as those of the second embodiment are denoted by the same reference numerals, and the description thereof is simplified.
[0026]
In the third embodiment, the guide component 17 and the connection substrate 14 in the second embodiment are formed as a connection substrate integrated guide component 27 as shown in FIGS. In Embodiment 2, the shape is substantially the same as when the connection substrate 14 is fixed to the guide component 17.
[0027]
Note that the connection board integrated guide component 27 is suitably made of ceramic from the viewpoint of being capable of precision processing and having an appropriate strength.
[0028]
Since the third embodiment is configured as described above, the same effect as that of the second embodiment can be obtained. At the same time, the structure is simplified because the guide component and the connection board are integrated, and the connection board integrated guide is provided. The part 27 becomes thinner and can be easily embedded in a thinner composite structure.
[0029]
Embodiment 4 FIG.
Next, a fourth embodiment will be described with reference to FIGS. FIG. 8 is an exploded perspective view of the optical fiber connector according to the fourth embodiment, and FIG. 9 is a cross-sectional view of the optical fiber connector according to the fourth embodiment in a state of being embedded in a composite material structure. 8 and 9, the same reference numerals are given to the same elements as those in the second embodiment, and the description thereof is simplified.
[0030]
In the fourth embodiment, an adhesive injection hole 39 for injecting an adhesive is provided in the connection substrate 14 and the guide component 17 so that an adhesive can be injected into the abutting surface of the optical fiber 2 and the optical fiber 3. It is. Other configurations are the same as those of the second embodiment.
[0031]
In the fourth embodiment, after the optical fiber 2 and the optical fiber 3 are fixed on the connection substrate 14, for example, an ultraviolet curable adhesive for optical fiber connection is injected from the adhesive injection hole 39, and ultraviolet rays are injected. The adhesive can be cured by irradiation, and the connection end portions of the optical fiber 2 and the optical fiber 3 can be securely fixed in a butt-joined state.
[0032]
Since the fourth embodiment is configured as described above, the same effect as that of the second embodiment can be obtained, and at the same time, both the connection end portions of the optical fiber 2 and the optical fiber 3 are butt-joined by an adhesive and completely Fixed to. As a result, it is possible to obtain a more reliable connection with the optical fibers 2 and 3 with lower loss.
[0033]
In the fourth embodiment, the example in which the injection hole for injecting the adhesive is provided in the optical fiber connector of the second embodiment is shown. Similarly, the optical fiber connector of the third embodiment is provided. In this case, the same effect can be obtained even if an adhesive injection hole is provided in the connection board integrated guide component 27.
[0034]
Embodiment 5. FIG.
Next, a fifth embodiment will be described with reference to FIGS. FIG. 10 is an exploded perspective view of the optical fiber connector according to the fifth embodiment, and FIG. 11 is a cross-sectional view of the optical fiber connector according to the fifth embodiment in a state of being embedded in a composite material structure. 10 and 11, the same elements as those in the second embodiment are denoted by the same reference numerals, and the description thereof is simplified.
[0035]
In the fifth embodiment, a taper surface is provided on the back surface of the guide component 17 in the second embodiment to attach a slide type fixing bracket.
That is, in FIGS. 10 and 11, reference numeral 40 denotes a slide-type fixing bracket made of metal, ceramics, or plastic, for pressing and fixing the optical fiber 3 into the V-shaped groove of the connection substrate 4. Reference numeral 41 denotes a fixing pin for fixing the slide-type fixing bracket 40. The guide component 17, the connection board 14, the cushioning material 16, and the sliding-type fixing bracket 40 have holes 42, 43, through which the fixing pin 41 passes. 44 and 45 are revealed. In addition, here, a taper surface 17 a that tapers the protruding portion is provided on the back side most part of the portion protruding outside the composite material structure 1 of the guide component 17. Further, the slide-type fixing bracket 40 is formed as a cylindrical body having a tapered surface 40a for sliding while being joined to the tapered surface 17a. Accordingly, the taper surface 40a of the slide-type fixing metal fitting 40 slides on the taper surface 17a. Therefore, the fixing metal fitting 15b can be bent so as to avoid the taper surface 17a. The size of 15 on the optical fiber 3 side is set short. The above is the configuration different from the second embodiment, and the other configuration is the same as the second embodiment.
[0036]
Next, when the optical fiber is embedded in the composite material structure 1, the following procedure is performed. First, the connection substrate 14 is fixed on the guide component 17 as shown in FIG. Next, after placing the optical fiber 2 in the groove of the guide component 17 and placing the cushioning material 16, the fixing bracket 15 is put on, and the bent pieces 15 a and 15 b of the fixing bracket 15 are bent. Similarly, the optical fiber 2 is elastically pressed onto the V-shaped groove of the connection substrate 14 through the buffer material 16 to fix the optical fiber 2 to the optical fiber connector. At this time, in the fifth embodiment, since the bent piece 15b of the fixing bracket 15 is shorter than in the second to fourth embodiments, the connection end of the optical fiber 2 is more than the bent piece 15b. You are in the upper position.
[0037]
In this state, the optical fiber 2 side portion of the optical fiber connector is embedded in the composite material structure 1 as shown in FIG. Thereafter, when connecting the optical fiber 3 outside the composite material structure 1, the connection end of the optical fiber 3 is inserted between the connection substrate 14 and the buffer material 16, and the V-shaped groove on the surface of the connection substrate 14 is inserted. The end surfaces of both connection end portions of the optical fiber 2 and the optical fiber 3 are butted together. Then, the taper surface 40a of the slide-type fixing metal fitting 40 is provided from the outside of the composite material structure 1 to the outside of the cushioning material 16 and the guide component 17 temporarily held by the fixing metal fitting 15, as shown in FIG. The slide type fixing metal fitting is put on the slide type while being slid in the axial direction of the optical fiber 3, and fixed by the fixing pin 41. At this time, the optical fiber 3 is elastically pressed against the connection substrate 4 via the buffer material 16 and is fixed since the end portion of the guide component 17 is the tapered surface 17a.
[0038]
Since the optical fiber connector according to the fifth embodiment is configured as described above, the optical fiber 3 can be freely attached and detached by inserting and removing the slide-type fixing bracket 40 at the same time as achieving the same effects as the second embodiment. It becomes possible to do.
In addition, although the example which used the slide-type fixing metal fitting was shown with respect to the optical fiber connector of Embodiment 2, here, it applied to this Embodiment 5 also about the optical fiber connector of Embodiment 3. Depending on the configuration, the same effect can be obtained by using the slide-type fixing bracket 40.
[0039]
As is clear from the above description, the composite material structure 1 in which the optical fiber is embedded is the light embedded in the composite material structure 1 by using any one of the optical fiber connectors of the first to fifth embodiments. The fiber 2 and the optical fiber 3 outside the composite material structure 1 can be easily connected.
[0040]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
An optical fiber connector according to the present invention is an optical fiber connector for connecting a connection end portion of an optical fiber embedded in a composite material structure and a connection end portion of an optical fiber outside the composite material structure. A connection substrate having a cross-sectional V-shaped groove for placing the connection end of the optical fiber embedded in the structure and the connection end of the optical fiber outside the composite material structure in abutting state, and the connection substrate A fixing mechanism for fixing the connection substrate and the two connection end portions so as to press the both connection end portions onto the V-shaped groove of the cross section and hold the both connection end portions in abutting state. A guide component for guiding the optical fiber embedded in the composite material structure to the connection board and reinforcing and holding the connection board in strength. Have The fixing mechanism is Embedded in the composite material structure Side Fix optical fiber did portion But Embeddable in the composite structure Has been Therefore, the optical fibers can be easily connected to each other without performing optical polishing or precise alignment work on the end faces of the connection ends of the optical fibers. Furthermore, it is possible to trim the end of the composite material structure freely without cutting the connection end of the optical fiber embedded in the composite material structure. The
[0042]
In addition, the present invention 2 According to this invention, since the guide component and the connection substrate have an integral structure, the structure of the optical fiber connector becomes simple and thin. Therefore, it becomes possible to embed the optical fiber in a thinner composite material structure.
[0043]
No. 1 of this invention 3 According to the invention, since the guide component and the connection substrate have holes for injecting the adhesive into the abutting portions of both the connecting end portions of the optical fiber, the adhesive is injected into the abutting portion of the optical fiber. As a result, the butted surfaces are reliably joined, and a more reliable and lower loss optical fiber connection can be obtained.
[0044]
In addition, the present invention 4 Departure Tomorrow , An optical fiber connector for connecting a connection end of an optical fiber embedded in a composite material structure and a connection end of an optical fiber outside the composite material structure, the optical fiber connector embedded in the composite material structure A connection substrate having a cross-sectional V-shaped groove for placing the connection end portion and the connection end portion of the optical fiber outside the composite material structure in abutting state, and the cross-sectional V-shaped groove of the connection substrate on the cross-sectional V-shaped groove A fixing mechanism for fixing the connection board and the both connection ends so as to press both connection ends and hold the both connection ends in a butted state; The fixing mechanism is The portion to which the optical fiber on the side embedded in the composite material structure is fixed can be embedded in the composite material structure. Since the optical fiber outside the composite material structure is detachably pressed against the V-shaped groove of the connection board by a slide mechanism that slides the slide-type fixing bracket in the direction of the arrangement axis of the optical fiber. By attaching and detaching the optical fiber, the optical fiber can be attached and detached freely.
[0045]
In addition, the present invention 5 According to the composite material structure of the present invention, 4 Since the optical fiber is embedded using any one of the optical fiber connectors according to the invention, the optical fiber embedded in the composite material structure and the optical fiber outside the composite material structure can be easily connected.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an optical fiber connector according to a first embodiment.
FIG. 2 is a cross-sectional view of the optical fiber connector according to Embodiment 1 in a state embedded in a composite material structure.
FIG. 3 is a view taken along arrow A in FIG. 2;
4 is an exploded perspective view of an optical fiber connector according to Embodiment 2. FIG.
FIG. 5 is a cross-sectional view of the optical fiber connector according to Embodiment 2 in a state of being embedded in a composite material structure.
6 is an exploded perspective view of an optical fiber connector according to Embodiment 3. FIG.
FIG. 7 is a cross-sectional view of an optical fiber connector according to Embodiment 3 in a state of being embedded in a composite material structure.
8 is an exploded perspective view of an optical fiber connector according to Embodiment 4. FIG.
FIG. 9 is a cross-sectional view of an optical fiber connector according to Embodiment 4 in a state embedded in a composite material structure.
10 is an exploded perspective view of an optical fiber connector according to Embodiment 5. FIG.
FIG. 11 is a cross-sectional view of an optical fiber connector according to a fifth embodiment in a state embedded in a composite material structure.
FIG. 12 is an explanatory view showing an example of a conventional optical fiber connector.
13 is a view showing a state in which the optical fiber connector of FIG. 12 is aligned and fixed to a composite material structure using a dedicated jig.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Composite material structure, 2 Optical fiber, 3 Optical fiber, 4, 14 Connection board | substrate 5, 15 Optical fiber fixing metal fittings, 5a, 15a Optical fiber fixing bending piece part, 5b, 15b Optical fiber fixing bending piece part, 6 , 16 cushioning material, 7, 17 guide part, 17a taper surface, 27 connection board integrated guide part, 39 adhesive injection hole, 40 slide type fixing bracket, 41 fixing pin.

Claims (5)

An optical fiber connector for connecting a connection end of an optical fiber embedded in a composite material structure and a connection end of an optical fiber outside the composite material structure,
A connection substrate having a cross-sectional V-shaped groove for placing the connection end of the optical fiber embedded in the composite material structure and the connection end of the optical fiber outside the composite material structure in a butted state;
A fixing mechanism that fixes the connection board and the two connection ends so as to press the connection ends onto the V-shaped groove of the connection board and hold the connection ends in abutting state ;
A guide part for guiding the optical fiber embedded in the composite material structure to the connection substrate and reinforcing and holding the connection substrate in strength ,
The fixing mechanism, the optical fiber connector, characterized in that said composite material structure implanted fixation portion optical fiber on the side that is capable embedded with respect to the composite structure. Optical fiber connector according to claim 1, wherein said guide part and said connection substrate is characterized in that it is an integral structure. The guide part and the connection substrate, the optical fiber connector of claim 1, wherein it has a hole for injecting an adhesive to the abutting portions of the connection end portion of the optical fiber. An optical fiber connector for connecting a connection end of an optical fiber embedded in a composite material structure and a connection end of an optical fiber outside the composite material structure,
A connection substrate having a cross-sectional V-shaped groove for placing the connection end of the optical fiber embedded in the composite material structure and the connection end of the optical fiber outside the composite material structure in a butted state;
A fixing mechanism for fixing the connection board and the two connection ends so as to press the connection ends on the V-shaped groove of the connection board and hold the connection ends in abutting state; Have
The fixing mechanism is configured such that a portion where the optical fiber on the side embedded in the composite material structure is fixed can be embedded in the composite material structure, and a slide-type fixing bracket is slid in the arrangement direction of the optical fiber. An optical fiber connector characterized in that an optical fiber outside the composite material structure is detachably pressed into a V-shaped groove of the connection substrate by a sliding mechanism . Composite structure characterized in that the optical fiber is embedded by using an optical fiber connector according to any one of claims 1 to 4.

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