JP5830454B2 - Optical fiber structure and method for manufacturing optical fiber structure - Google Patents

Description

  The present invention relates to an optical fiber structure and a method for manufacturing the optical fiber structure.

  As an optical fiber wiring, a so-called cross-connect wiring is known in which a plurality of fiber bundles in an input region are recombined into a desired arrangement in an output region by recombining the arrangement of each optical fiber single core. As an optical fiber structure that employs this structure, a plurality of fiber bundles in the input region, a plurality of fiber bundles in the output region, and a sequence recombination region, which is a location for recombining the arrangement of single optical fibers, are resin sheets. An optical fiber structure (optical fiber wiring sheet) arrayed and held by a wiring member such as the above is known (for example, see Patent Document 1).

In the optical fiber structure described in Patent Document 1, a plurality of fiber bundles in the input region and a plurality of fiber bundles in the output region are sandwiched between two resin sheets that are wiring members together with the rearrangement region. Is retained. In this optical fiber structure, the arrangement of the fiber bundles in the input region and the output region and the optical fiber single core in the rearrangement region are arranged so that three or more optical fiber cores in the rearrangement region do not cross multiple. The arrangement of is devised.
In other words, when three or more optical fiber cores in the rearrangement region are multiple crossed and held on the resin sheet, local bending (microbending) of the optical fiber core at the crossing portion becomes tight. Although the load acting on the single fiber becomes large, the optical fiber structure described in Patent Document 1 devised the arrangement of each fiber bundle and the arrangement of the single optical fiber in the rearrangement region, and the crossing in the rearrangement region. This problem is solved by having the parts scattered in various places.

By the way, there is a case where it is necessary to receive signals input to one end side of a plurality of optical fiber single cores of the optical fiber at the same timing on the other end side. In this case, even if the total length of each optical fiber is equal in design, if each optical fiber is bent and wired individually, the timing of the arriving signal varies for each optical fiber.
Therefore, in the optical fiber structure described in Patent Document 2, in order to eliminate variations in the optical path length of each optical fiber, the total length of the straight portions of each optical fiber is equal, and a plurality of bent portions are not included. The total length is designed to be equal. In addition, the optical fiber single core of this optical fiber structure is arranged and held on the adhesive layer of the substrate in almost the whole area except for the intersection.

Japanese Patent No. 3853600 Japanese Patent No. 3393101

  However, in the conventional optical fiber structure, a part of each fiber bundle in the input region and the output region and all the optical fiber single cores in the rearrangement region are between two resin sheets which are wiring members. Since the optical fiber including the rearrangement region occupies a wide plane space, it is difficult to install in a narrow space.

In the optical fiber structure described in Patent Document 2, since almost the entire area of a plurality of optical fiber single cores is arranged and held on the substrate, the optical fiber has a wide planar space like the optical fiber structure described in Patent Document 1. It becomes difficult to install in a narrow space.
Moreover, the optical fiber structure described in Patent Document 2 eliminates multiple intersections of three or more optical fiber single cores, further aligns the total length of the straight portions of each optical fiber single core, Since the total length must also be equalized, the wiring design becomes extremely complicated if the number of single optical fibers handled increases.

  Accordingly, the present invention can realize a compact design while suppressing the load on the single optical fiber, and can be easily designed to make the optical path lengths of all the single optical fibers equal. And a method of manufacturing the optical fiber structure.

In the invention of the optical fiber structure according to claim 1, the optical fiber single core of the plurality of fiber bundles is light that is recombined through the recombination region that reorders the sequence from the input region to the output region. An optical fiber structure including a fiber and a wiring member to which the optical fiber is attached, wherein the wiring member is a continuous annular shape that holds the plurality of fiber bundles radially arranged in an input region and an output region. a holding unit, all of the optical fiber single core of the sequence recombination region, said in an array holding position of the input area equal wiring distance to the array holding position of the output region, the holding portion of the annular It is arranged in a non-holding portion that does not hold the optical fiber single cores arranged on the inside.
As a result, the fiber bundle of the input region and the fiber bundle of the output region are arranged and held in the holding part on the wiring member , respectively, and all the optical fiber single cores in the rearrangement region are not held in the non-holding part. In addition, the wiring length is uniform. For this reason, the plurality of optical fiber single cores in the rearrangement region are three-dimensionally crossed with a uniform wiring length without causing local bending in the non-holding portion inside the holding portion.

The optical fiber structure according to claim 2 is the optical fiber structure according to claim 1, wherein the annular holding portion is provided on a holding base material.

The optical fiber structure according to claim 3 is the optical fiber structure according to claim 2, wherein the holding base is formed in a shape along the outer periphery of the annular holding portion. It is.

The optical fiber structure according to claim 4 is the optical fiber structure according to claim 2 or 3, wherein a space portion where the holding base material does not extend is provided inside the annular holding portion. It is characterized by being.

According to a fifth aspect of the invention, there is provided an optical fiber structure manufacturing method in which one end of an optical fiber is disposed such that the other end spaced apart from the one end passes through the center of a substantially annular holding portion of the wiring member. The optical fiber is held at the array holding position of the input region of the holding part, and the other end of the optical fiber single core and the wiring member are rotated relative to each other by a set angle around the center of the holding part. The other end of the single fiber is held at the array holding position where it is held as an optical fiber single fiber of the fiber bundle in the output region on the holding part , and thereafter, similarly, one end of the remaining optical fiber core is connected to the input region. The other end is sequentially held at the array holding position, and the other end is held at the array holding position of the output region.
An invention of a method for manufacturing an optical fiber structure according to claim 6 is the method for manufacturing an optical fiber structure according to claim 5, wherein one end and the other end of all of the optical fiber single cores are arranged in an array region holding position. And a bundle of optical fibers held at the array holding positions of the input area and the output area are bundled to form a fiber bundle. It is what.

According to the invention of the optical fiber structure according to any one of claims 1 to 4, the plurality of optical fiber single cores in the rearrangement region does not cause local bending in the non-holding portion inside the annular holding portion. Because the three-dimensional crossing with uniform wiring length reduces the local load acting on the optical fiber single core, the optical fiber including the rearranged region is compact without occupying a wide plane space. In addition, the wiring design for equalizing the optical path lengths of all the optical fiber single cores can be facilitated.

In particular, in the invention of the optical fiber structure according to claim 4, since the space portion where the holding substrate does not extend is provided inside the annular holding portion, the optical fiber unit in the rearrangement region is provided. A portion of the heart can be placed in the space inside the holding substrate. Therefore, according to the fourth aspect of the invention, the whole can be made more compact.

  According to the invention of the method for manufacturing an optical fiber structure according to claim 5, it is possible to hold the optical fiber compactly without occupying a wide plane space while reducing a local load acting on the single optical fiber, Moreover, it is possible to easily manufacture an optical fiber structure capable of facilitating wiring design for equalizing the optical path lengths of all optical fiber single cores.

It is a top view which shows the optical fiber structure of one Embodiment of this invention. It is a perspective view which shows the manufacturing apparatus of the optical fiber structure of one Embodiment of this invention. It is a fragmentary sectional side view which shows the manufacturing apparatus of the optical fiber structure of one Embodiment of this invention. It is a typical top view for demonstrating the manufacturing method of the optical fiber structure using the manufacturing apparatus of one Embodiment of this invention. It is a typical top view for demonstrating the manufacturing method of the optical fiber structure using the manufacturing apparatus of one Embodiment of this invention. It is a typical top view for demonstrating the manufacturing method of the optical fiber structure using the manufacturing apparatus of one Embodiment of this invention. It is a typical top view for demonstrating the manufacturing method of the optical fiber structure using the manufacturing apparatus of one Embodiment of this invention. It is a perspective view which shows another manufacturing apparatus for manufacturing the optical fiber structure of one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a top view of an optical fiber structure 100 according to an embodiment. As shown in the figure, the optical fiber structure 100 is configured by attaching an optical fiber 2 to a wiring member 3. The optical fiber 2 includes twelve optical fiber bundles 5A-1, 5A-2,... 5A-12 in which twelve optical fiber cores 4 are bundled, and fiber bundles 5A-1, 5A- in the input region. 2 ... 5A-12 optical fiber cores 4 are rearranged in the rearrangement region 6 and 12 optical fiber cores 4 recombined in the rearrangement region 6 are bundled again every twelve. Output region fiber bundles 5B-1, 5B-2... 5B-12. In addition, the fiber bundles 5A-1, 5A-2,... 5A-12 in the input region and the fiber bundles 5B-1, 5B-2,. The bundles 5A ... and the fiber bundles 5B ... are called.
In this embodiment, the arrangement is recombined so that the single optical fibers 4 of the fiber bundles 5A in the input region are evenly distributed one by one to the 12 fiber bundles 5B in the output region. Here, the single optical fibers 4 of the fiber bundles 5A in the 12 bundle input regions are recombined so as to be evenly distributed to the fiber bundles 5B in the 12 output regions. The number of bundles of fiber bundles 5A and 5B in the output region, the number of single optical fibers 4 per bundle, and the like are not limited to those in this embodiment.

In the wiring member 3 of this embodiment, an annular sheet 7 (holding base material) made of a resin such as polyimide, polyethylene terephthalate, polyethylene, or polypropylene is used as a wiring base material. The upper surface of the sheet 7 is coated with an adhesive to form an adhesive layer 8 (holding portion). Therefore, the sheet 7 as the holding base has a shape along the outer periphery of the adhesive layer 8 as the holding portion. Since the wiring member 3 has an annular shape, a circular non-holding portion 10 where the sheet 7 does not extend is provided on the inner side. The fiber bundles 5A in the input region and the fiber bundles 5B in the output region are radially arranged and held in the annular adhesive layer 8, and the rearranged region 6 in the fiber bundles 5A, 5B is in the annular adhesive layer. 8 is arranged in the upper region of the non-holding portion 10 inside.
In this embodiment, a substantially half region in the circumferential direction of the annular adhesive layer 8 is an input placement region 8F in which the fiber bundles 5A of the input region are arranged and held, and the remaining in the circumferential direction of the adhesive layer 8 The half of the region is an output arrangement region 8S in which the fiber bundles 5B of the output region are arranged and held.

The optical fiber single cores 4 of the fiber bundles 5A in the input region held in the input placement region 8F on the adhesive layer 8 are drawn out to the non-holding portion 10 side in the rearrangement region 6, and output placement region 8S The array is held at the corresponding location. In this optical fiber structure 100, all the optical fiber single cores 4 are thus held in the input arrangement area 8F and the output arrangement area 8S on the adhesive layer 8, so that the fiber bundles 5A in the input area are ... And the fiber bundles 5B in the output region are arranged and held on the adhesive layer 8 in a state where the arrangement of the optical fiber single cores 4 is recombined.
Here, all the optical fiber single cores 4 in the rearrangement region 6 of the optical fiber structure 100 have the same wiring length from the fixed position to the input placement region 8F to the fixed position to the output placement region 8S. And in the non-holding part 10, it mutually intersects three-dimensionally.

Further, the fiber bundles 5A, 5B,... Drawn out from the adhesive layer 8 of the wiring member 3 radially outward are covered with a covering member 21. In the fiber bundles 5A and 5B, it is desirable to arrange 12 optical fiber single cores 4 in a horizontal row and cover the peripheral area with a covering member 21 to form a tape core wire.
As a material used as the covering member 21, an acrylic resin, a rubber resin, a polyvinyl ether resin, or the like can be used. Among these, a rubber resin is suitable for the application. Furthermore, among rubber systems, silicone rubber is suitable because it has excellent environmental characteristics and has little influence on heat resistance and moisture resistance.

Silicone rubber is a polymer compound having a main skeleton formed by siloxane bonds, but modified silicone rubber in which various organic groups are introduced to add a new function to the excellent characteristics of silicone can also be used. The modified silicone rubber has almost no low-molecular-weight siloxane, which is considered to cause contact failure of electronic products, and is excellent in environmental properties.
Examples of the modified silicone rubber include those having an organic group introduced into the side chain of polysiloxane, those having an organic group introduced into both ends of polysiloxane, those having an organic group introduced into one end of polysiloxane, polysiloxane There are those in which an organic group is introduced into both the side chain and both ends, and those in which an organopolysiloxane is introduced into one end of an organic polymer. Moreover, you may make it give functionality to a tape core wire by giving a flame retardance and heat resistance to a silicone rubber. In addition, when curing, it is preferable to use a moisture curing type in which distortion such as warpage or shrinkage hardly occurs during curing and is cured by moisture at room temperature.

2 and 3 are diagrams showing an embodiment of a manufacturing apparatus 1 for manufacturing the optical fiber structure 100. FIG.
As shown in these drawings, the manufacturing apparatus 1 includes a rotary table 12 having a bottomed cylindrical table body 12a on which a wiring member 3 is fixed to an upper surface, and a first gripping member having two pairs of chuck claws 13a. A device 13A and a second gripping device 13B and moving devices 14A and 14B for moving the first and second gripping devices 13A and 13B, respectively, are provided.

The rotary table 12 is configured such that the table body 12a on which the wiring member 3 is placed and fixed on the upper surface can be rotated about the annular center portion of the adhesive layer 8 (holding portion). The rotation and stop of the rotary table 12 are controlled by a controller (not shown).
The first and second gripping devices 13A and 13B are capable of gripping two locations separated in the axial direction of the optical fiber single core 4 by two pairs of chuck claws 13a. The holding posture of the optical fiber single core 4 by the first and second holding devices 13A and 13B is such that the optical fiber single core 4 passes through the center of the annular shape of the adhesive layer 8 from one end to the other end. Yes. Therefore, when the first and second gripping devices 13A and 13B that grip the optical fiber single core 4 are moved down above the adhesive layer 8, the gripped optical fiber single core 4 becomes an annular ring of the adhesive layer 8. Fixed in a posture that passes through the center of the shape.

  Next, a manufacturing method of the optical fiber structure 100 using the manufacturing apparatus 1 will be described with reference to FIGS. When manufacturing the optical fiber structure 100, the wiring member 3 is fixedly installed in advance on the table body 12a of the rotary table 12 with the adhesive layer 8 facing up.

  FIG. 4 is a diagram illustrating a wiring state of the first optical fiber single core 4 of the first fiber bundle 5A-1. In the drawing, reference numerals 1a to 12a are assigned to portions of the input arrangement region 8F where the fiber bundles 5A-1, 5A-2,... 5A-12 of the input region are actually held. In addition, the portions where the optical fiber single cores 4 of the fiber bundles 5B-1, 5B-2,... 5B-12 in the output region are actually held are denoted by reference numerals 1b to 12b. The numerals 1a to 12a and 1b to 12b represent the wiring positions. These symbols are the same in other drawings.

  First, the first optical fiber single core 4 of the first fiber bundle 5A-1 is gripped by the chuck claws 13a of the first and second gripping devices 13A and 13B above the rotary table 12, respectively. At this time, the first gripping device 13A is disposed above the portion 1a in the input placement region 8F of the adhesive layer 8, and the second gripping device 13B is disposed in the output placement region 8S of the adhesive layer 8. It is arranged above the 1b portion. Thus, the first optical fiber single core 4 extends linearly above the adhesive layer 8 so as to pass through the center of the annular shape of the adhesive layer 8.

  In this state, one moving device 14A lowers the first gripping device 13A by a predetermined amount. Thereby, the optical fiber single core 4 gripped by the chuck claw 13a of the first gripping device 13A is arrayed and held in the 1a portion of the input arrangement region 8F on the adhesive layer 8. Thereafter, the chuck claw 13a of the first gripping device 13A releases the gripping of the optical fiber single core 4, and one moving device 14A raises the first gripping device 13A to the initial position.

Subsequently, the other moving device 14B similarly lowers the second gripping device 13B by a predetermined amount. Thereby, the optical fiber single core 4 gripped by the chuck claw 13a of the second gripping device 13B is adhesively held by the 1b portion of the output arrangement region 8S on the adhesive layer 8. Thereafter, the chuck claw 13a of the second gripping device 13B releases the grip of the optical fiber single core 4, and the other moving device 14B raises the second gripping device 13B to the initial position.
As a result, the first optical fiber single core 4 is arrayed and held on the adhesive layer 8 in a state of extending linearly so as to pass through the annular center of the adhesive layer 8, and the wiring in the non-holding portion 10. The length is the same length as the inner peripheral diameter of the adhesive layer 8.
In the case of this embodiment, in the wiring of the first optical fiber single core 4, the rotary table 12 is not actually rotated as described above, but the wiring member 3 is rotated by 0 ° as the set angle. Become.

FIG. 5A and FIG. 5B are diagrams showing the wiring state of the second optical fiber single core 4 of the first fiber bundle 5A-1.
In the wiring of the second optical fiber single core 4, as shown in FIG. 5A, the optical fiber single core 4 is first gripped by the first gripping device 13A and the second gripping device 13B at the initial position. From this state, one moving device 14A lowers the first gripping device 13A by a predetermined amount. Thereby, the optical fiber single core 4 gripped by the chuck claw 13a of the first gripping device 13A is held in the 1a portion of the input arrangement region 8F on the adhesive layer 8. In addition, when the wiring of the optical fiber single core 4 is sequentially switched from the first to the second, the second to the third, in order to sequentially arrange the optical fiber single cores 4 on the input arrangement region 8F, Actually, the arrangement holding position of the adhesive layer 8 is adjusted by a minute amount by the rotary table 12 by the diameter of the optical fiber single core 4.
Thereafter, the chuck claw 13a of the first gripping device 13A releases the gripping of the second optical fiber single core 4, and one moving device 14A raises the first gripping device 13A to the initial position.

Next, while the second gripping device 13B grips the second optical fiber single core 4 from this state, as shown in FIG. 5B, the turntable 12 has the fiber bundles 5A, 5B,. Rotate clockwise. The gripping position of the optical fiber single core 4 by the second gripping device 13B is relatively moved to the position above the 2b portion of the output arrangement region 8S on the adhesive layer 8. From this state, the other moving device 14B lowers the second gripping device 13B by a predetermined amount. Thereby, the optical fiber single core 4 gripped by the chuck claws 13a of the second gripping device 13B is adhesively held by the 2b portion of the output arrangement region 8S on the adhesive layer 8.
As a result, the second optical fiber single core 4 is slightly curved and bent on the non-holding portion 10, and both ends are held by the 1a portion on the input placement region 8F and the 2b portion on the output placement region 8S. . In addition, the wiring length of the optical fiber single core 4 between 1a and 2b at this time becomes the same as the wiring length of the first optical fiber single core 4.
Thereafter, the second gripping device 13B releases the gripping of the second optical fiber single core 4 by the chuck claws 13a.

Thereafter, the remaining optical fiber single cores 4... Of the first fiber bundle 5A-1 are the same as described above, of the 1a portion of the input arrangement area 8F on the adhesive layer 8 and the output arrangement area 8S. 3b to 12b are respectively adhered and held.
FIG. 6 shows the wiring of the twelfth optical fiber core 4 of the first fiber bundle 5A-1.

  Through the steps so far, the input region of each optical fiber single core 4 of the first fiber bundle 5A-1 is held in the 1a portion of the input arrangement region 8F on the adhesive layer 8, and the rearrangement region 6 is non- The output region is distributed and held in each of the locations 1b to 12b of the output arrangement region 8S on the adhesive layer 8 while keeping the wiring length in the holding unit 10 constant.

When wiring the second and subsequent fiber bundles 5A-2, 5A-3,... 5A-12, the initial rotation position of the rotary table 12 is below the first gripping device 13A, and the input arrangement area 8F on the adhesive layer 8 is located below. Are sequentially changed from the position where the 1a portion is disposed to the position where the 2a portion is disposed, the position where the 3a portion is disposed, the position where the 12a portion is disposed.
And each optical fiber single fiber 4 of the second and subsequent fiber bundles 5A-2, 5A-3,... 5A-12 has an end portion on the adhesive layer 8 as in the case of the first bundle. The 2a portion, 3a portion... 12a portion of the arrangement area 8F is adhesively held, and the other end side is arranged and held in the 1b portion, 2b portion, 3b portion. The In the case of each optical fiber single fiber 4 of the second and subsequent fiber bundles, the optical fiber single fibers 4 are arranged and held on the adhesive layer 8 in a state of extending linearly so as to pass through the center of the annular shape of the adhesive layer 8. The wiring length in the non-holding portion 10 is the same as the inner peripheral diameter of the adhesive layer 8.

When the wiring of all the optical fiber single cores 4 is completed in this way, a total of 24 fiber bundles 5A, 5B,... Of the input region and the output region are radially arranged and held on the annular adhesive layer 8, and the rearrangement region. All the optical fiber single cores 4 of 6 are arranged three-dimensionally in the non-holding portion 10 inside the annular adhesive layer 8 and the lengths of all the optical fiber single cores 4 in the rearrangement region 6 Becomes uniform.
Thereafter, the optical fiber single cores 4... Arranged and held in the 1a, 2a,... 12a portion of the input arrangement region 8F on the wiring member 3 and the 1b, 2b,. The fiber bundles 5A, 5B,... Are bundled and covered with the covering member 21. Thereby, the optical fiber structure 100 shown in FIG. 1 is completed.

In the optical fiber structure 100 configured as described above, all the optical fiber single cores 4 in the rearrangement region 6 are locally bent at the non-holding portion 10 inside the annular adhesive layer 8. Without crossing in a three-dimensional manner with a uniform wiring length, the optical fiber 2 including the sequence recombination region 6 can be provided with a wide plane space while reducing the local load acting on the optical fiber single cores 4. It can be kept compact without occupying.
The optical fiber structure 100 is arranged in such a manner that all the optical fiber single cores 4 are spanned over a uniform length between the input arrangement area 8F and the output arrangement area 8S provided in the annular adhesive layer 8. Because of the simple structure held, the optical path lengths of all the optical fiber single cores 4 can be easily made uniform without complicating the wiring design.

  Further, in this optical fiber structure 100, the wiring member 3 is formed in an annular shape, and the non-holding portion 10 where the sheet 7 does not extend is provided on the inner side thereof. A part of the cores 4 can be arranged in the non-holding portion 10 inside the wiring member 3, and the whole can be made thin and compact.

  By the way, although this optical fiber structure 100 can be used as it is, a plurality of optical fiber single cores 4... In the rearrangement region 6 are molded with resin, or the outside is covered with a separate casing. You may do it. In this case, the optical fiber single cores 4 in the rearrangement region 6 can be reliably protected from the outside, and the optical characteristics of the optical fiber can always be maintained in a stable state.

The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention.

  Further, when the optical fiber structure 100 is manufactured by the manufacturing apparatus 1 described above, the extending end side of the optical fiber single core 4 is held at a fixed position, and the wiring member 3 (adhesive layer 8) side is held on the rotary table 12. However, conversely, the wiring member 3 (adhesive layer 8) side may be fixed and the extended end side of the optical fiber single core 4 may be rotated with respect to the wiring member 3.

Furthermore, the gripping device of the manufacturing apparatus 1 is not limited as long as the optical fiber single core 4 can maintain a constant distance between chuck claws gripping from one end to the other end.
For example, like the manufacturing apparatus 101 shown in FIG. 7, a single gripping device 13 is used, and one end side of the optical fiber single core 4 is gripped by the chuck claws 13 a and 13 a of the gripping device 13. The arrangement is held at the arrangement holding position of the input region, and then the drawing portion of the optical fiber single core 4 is slidably held by the gripping device 13, and the arrangement holding position on one end side of the optical fiber single core 4 as the gripping device 13 moves. It is also possible to measure the length of the optical fiber single core 4 so that the specific position on the other end side of the optical fiber core 4 can be gripped by the chuck claws 13a and 13a of the gripping device 13. In this case, the specific position of the optical fiber single core 4 gripped by the chuck claws 13a and 13a is aligned and held at an appropriate position on the adhesive layer 8 after the alignment holding position of the adhesive layer 8 is adjusted by the rotary table 12. .
In this specification, the center when the wiring member 3 (adhesive layer 8) is rotated relative to the extending end side (the other end) of the optical fiber single core 4 is the wiring member 3 (adhesive layer 8). Means the position of the center of gravity.

2 Optical fiber 3 Wiring member 4 Optical fiber single core 6 Rearrangement region 7 Sheet (holding substrate)
8 Adhesive layer (holding part)
10 Non-holding part 100 Optical fiber structure

Claims (6)

An optical fiber in which a single optical fiber of a plurality of fiber bundles is recombined through a sequence recombination region in which the sequence is recombined sequentially from the input region to the output region;
In an optical fiber structure comprising a wiring member to which the optical fiber is attached,
The wiring member includes a continuous annular holding portion that radially holds the plurality of fiber bundles in an input region and an output region,
All the optical fiber single cores in the rearrangement region are located inside the annular holding portion with the same wiring distance from the arrangement holding position of the input region to the arrangement holding position of the output region. An optical fiber structure, characterized in that the optical fiber structure is disposed in a non-holding portion that does not hold the optical fiber single core. The optical fiber structure according to claim 1, wherein the annular holding portion is provided on a holding base material. The optical fiber structure according to claim 2, wherein the holding base is formed in a shape along an outer periphery of the annular holding portion. The optical fiber structure according to claim 2 or 3, wherein a space portion where the holding base does not extend is provided inside the annular holding portion. One end of the optical fiber is held at the array holding position of the input region of the holding portion, with the other end spaced apart from the one end passing through the center of the annular holding portion of the wiring member,
After rotating the other end of the optical fiber single core and the wiring member relative to each other with a set angle around the center of the holding portion,
To hold the other end of the optical fiber single core in the array holding position is retained as an optical fiber single-core fiber bundle of the output region on the holding portion,
Thereafter, similarly, the remaining optical fiber single core is sequentially held at one end at the array region holding position of the input region and at the other end at the array region holding position of the output region. One end and the other end of all the optical fiber single cores were held at the arrangement holding position of the input area and the arrangement holding position of the output area, and then held at the respective arrangement holding positions of the input area and the output area. 6. The method of manufacturing an optical fiber structure according to claim 5 , wherein each bundle constituted by a single optical fiber is bundled into a fiber bundle.

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