Hollow-core microstructured optical fiber ribbon and preparation method therefor

Abstract

Disclosed in the present invention are a hollow-core microstructured optical fiber ribbon and a preparation method therefor. The hollow-core microstructured optical fiber ribbon comprises a plurality of hollow-core microstructured optical fibers arranged side by side; the plurality of hollow-core microstructured optical fibers have the same end face structure and are externally covered with a ribboning resin used for fixing the positions thereof; a plurality of anti-resonance microstructured units are distributed on an inner side of a glass ferrule; an outermost coating externally covers the glass ferrule; the outermost coating has at least one pair of parallel positioning faces; the positioning faces of adjacent hollow-core microstructured optical fibers are mutually aligned and joined together, causing the plurality of hollow-core microstructured optical fibers arranged side by side to be fixed in the ribboning resin in the same orientation. In the hollow-core microstructured optical fiber ribbon provided by the present invention, the orientations of the hollow-core microstructured optical fibers are positioned by means of non-circular optical fiber coatings, and the optical fibers are arranged side by side by means of the parallel positioning faces, ensuring that the end face orientations of all of the hollow-core microstructured optical fibers in the optical fiber ribbon are consistent, thereby improving fusion splicing efficiency and reducing fusion splicing loss.

Description

A hollow-core microstructure optical fiber ribbon and its preparation method Technical Field

[0001] The present invention belongs to the field of optical communications, and more specifically, relates to a hollow-core microstructure optical fiber ribbon and a preparation method thereof. Background Art

[0002] Hollow-core microstructured optical fibers offer ultra-low loss, low dispersion, low nonlinearity, and propagation speeds close to the speed of light. With the deepening of research on hollow-core optical fibers based on the principle of antiresonance, hollow-core microstructured optical fibers with appropriate structural design can effectively reduce transmission losses. They have the potential to serve as optical fibers for ultra-long-distance communications and have the prospect of large-scale application. They are recognized as the next generation of optical fibers for ultra-high-capacity, low-latency, and high-speed optical communication systems.

[0003] A general user access network generally consists of three parts: feeder lines, distribution lines, and drop lines. Among these three parts of optical cables, the feeder line uses the most cores, followed by the distribution line, and the drop line uses the least. With the current rapid growth in data transmission demand, optical cables are developing in the direction of large core count and high core density. At the same time, in order to better reduce the cost and efficiency of fusion splicing, the preferred structure mostly uses optical fiber ribbon cables that can fusion splice multiple optical fibers at a time. Because traditional optical fibers have a circular core and a circular cladding, the optical fiber ribbons produced only need to consider the core alignment of the optical fibers for fusion splicing, and the fusion loss can be kept at a low level. Hollow-core microstructured optical fibers currently have rotational symmetry, but do not have perfect circular symmetry, so they cannot be rotated relative to each other at will. Otherwise, the antiresonance ring and the core area will not be well aligned, resulting in high fusion loss. Summary of the Invention

[0004] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a hollow-core microstructured optical fiber ribbon and a preparation method thereof, the purpose of which is to splice hollow-core microstructured optical fibers with parallel positioning surfaces to maintain the consistent orientation of the optical fibers arranged side by side in the optical fiber ribbon, so that each optical fiber in the optical fiber ribbon can be matched with the anti-resonant microstructure during fusion matching of the optical fiber ribbon, thereby achieving precise end face matching, thereby solving the technical problems that it is difficult to match the optical fiber end face of each optical fiber in the hollow-core microstructured optical fiber ribbon one by one and the fusion loss of the hollow-core microstructured optical fiber ribbon is large.

[0005] To achieve the above objectives, according to one aspect of the present invention, a hollow-core microstructured optical fiber ribbon is provided, comprising a plurality of hollow-core microstructured optical fibers arranged side by side; the plurality of hollow-core microstructured optical fibers have the same end face structure and are coated with a ribbon resin for fixing their positions;

[0006] The hollow-core microstructure optical fiber includes a glass sleeve, a plurality of anti-resonant microstructure units, and an outermost coating; the outer contour of the cross-section of the glass sleeve is circular; the plurality of anti-resonant microstructure units are distributed inside the glass sleeve; the outermost coating is coated on the glass sleeve;

[0007] The outermost coating has at least a pair of parallel positioning surfaces, such that the outer contour of the cross-section of the hollow-core microstructure optical fiber is non-circular, and the relative positions of the positioning surfaces and the plurality of anti-resonant microstructure units are consistent in the length direction;

[0008] The positioning surfaces of adjacent hollow-core microstructure optical fibers are registered and spliced with each other, such that the plurality of并排 arranged hollow-core microstructure optical fibers are fixed in the ribbon resin in the same orientation.

[0009] Preferably, for the hollow-core microstructure optical fiber ribbon, the positioning surfaces are straight lines on the cross-section of the hollow-core microstructure optical fiber.

[0010] Preferably, for the hollow-core microstructure optical fiber ribbon, the contours on both sides of the positioning surface of the outermost coating have asymmetry.

[0011] Preferably, for the hollow-core microstructure optical fiber ribbon, the outer contour of the cross-section of the optical fiber coating forming the optical fiber ribbon is a runway shape, an octagon, or a C shape.

[0012] Preferably, for the hollow-core microstructure optical fiber ribbon, the sleeve or the inner side of the sleeve of the hollow-core microstructure optical fiber has a mark, and the mark makes the end face of the hollow-core microstructure optical fiber have asymmetry.

[0013] Preferably, for the hollow-core microstructure optical fiber ribbon, the marks of the plurality of并排 arranged hollow-core microstructure optical fibers are in the same orientation relative to the arrangement direction of the optical fiber ribbon.

[0014] Preferably, for the hollow-core microstructure optical fiber ribbon, there is one or more layers of coating between the glass sleeve and the outermost coating; the coating has a color mark.

[0015] According to another aspect of the present invention, there is provided a method for preparing the hollow-core microstructure optical fiber ribbon, which includes the following steps:

[0016] Arrange a plurality of hollow-core microstructure optical fibers side by side, and register and splice the positioning surfaces of adjacent hollow-core microstructure optical fibers;

[0017] Coat and cure a photocurable resin outside the plurality of并排 arranged hollow-core microstructure optical fibers to form a ribbon resin, and fix the positions of the plurality of hollow-core microstructure optical fibers.

[0018] Preferably, in the method for manufacturing the hollow microstructure optical fiber ribbon, the markings of the multiple hollow microstructure optical fibers arranged side by side are in the same orientation relative to the arrangement direction of the optical fiber ribbon.

[0019] Preferably, in the method for manufacturing the hollow microstructure optical fiber ribbon, the coating of the hollow microstructure optical fiber has a color marking, and the multiple hollow microstructure optical fibers are arranged side by side according to a preset color marking sequence.

[0020] Generally speaking, compared with the prior art, the above technical solution conceived by the present invention can achieve the following beneficial effects:

[0021] For the hollow microstructure optical fiber ribbon provided by the present invention, the orientation of the hollow microstructure optical fiber is positioned by the non-circular optical fiber coating, and the optical fibers are arranged side by side through parallel positioning surfaces, ensuring that the end face orientations of all the hollow microstructure optical fibers in the optical fiber ribbon are consistent, facilitating the anti-resonant microstructure matching of the hollow microstructure optical fibers in the optical fiber ribbon one by one during fusion splicing, thereby improving the fusion splicing efficiency and reducing the fusion splicing loss.

[0022] In a preferred solution, through the markings of the hollow microstructure optical fiber, the geometric positions of the markings and the positioning surface of the optical fiber coating are always kept consistent in the length direction and are in the same orientation relative to the arrangement direction of the optical fiber ribbon, enabling the hollow microstructure optical fibers with rotationally symmetric coatings to also ensure consistent orientations in the optical fiber ribbon, such as the hollow microstructure optical fiber with an octagonal coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic structural diagram of a hollow microstructure optical fiber ribbon provided by the present invention, with additive-assisted positioning on the inner wall of the cladding and a racetrack-shaped outer contour;

[0024] FIG. 2 is a schematic structural diagram of a hollow microstructure optical fiber provided by the present invention, with additive-assisted positioning on the inner wall of the cladding and a racetrack-shaped outer contour;

[0025] FIG. 3 is a schematic structural diagram of a hollow microstructure optical fiber ribbon provided by the present invention, with additive-assisted positioning on the inner wall of the cladding and an octagonal outer contour;

[0026] FIG. 4 is a schematic structural diagram of a hollow microstructure optical fiber provided by the present invention, with additive-assisted positioning on the inner wall of the cladding and an octagonal outer contour;

[0027] FIG. 5 is a schematic structural diagram of a hollow microstructure optical fiber ribbon provided by the present invention, with additive-assisted positioning on the inner wall of the cladding and a U-shaped outer contour;

[0028] FIG. 6 is a schematic structural diagram of a hollow microstructure optical fiber provided by the present invention, with additive-assisted positioning on the inner wall of the cladding and a U-shaped outer contour;

[0029] In all the drawings, the same figure marks are used to represent the same elements or structures, where: 1 is the sleeve cladding, 2 is the first antiresonant cladding ring of the antiresonant microstructure unit, 3 is the second antiresonant cladding ring of the antiresonant microstructure unit, 4 is the mark, 5 is the coating, 6 is the positioning surface, 7 is the core region, and 8 is the parallel resin. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0031] The hollow-core microstructured optical fiber ribbon provided by the present invention comprises a plurality of hollow-core microstructured optical fibers arranged side by side; the plurality of hollow-core microstructured optical fibers have the same end face structure and are coated with a ribbon resin for fixing their positions;

[0032] The hollow core microstructure optical fiber includes a glass sleeve, a plurality of antiresonance microstructure units, and an outermost coating; the outer contour of the cross section of the glass sleeve is circular; the plurality of antiresonance microstructure units are distributed inside the glass sleeve; the outermost coating is coated on the glass sleeve;

[0033] The outermost coating has at least one pair of parallel positioning surfaces, resulting in a non-circular cross-sectional profile of the hollow-core microstructured fiber. The positioning surfaces are aligned longitudinally with the relative positions of the multiple antiresonant microstructured units. To achieve mutual registration, the positioning surfaces on one side of the optical fiber can be spliced ​​with the positioning surfaces on the other side of the adjacent optical fiber. The positioning surfaces can have a >-shaped profile in the cross-section of the hollow-core microstructured fiber, with one side convex and the other concave, thereby cooperating with each other. For ease of processing, the positioning surfaces are preferably straight lines in the cross-section of the hollow-core microstructured fiber. This not only allows for mutual alignment and registration, but also improves the flatness of the fiber ribbon through fine-tuning, avoiding the problem of inconsistent fiber heights within the fiber ribbon due to processing accuracy. Preferred cross-sectional profiles of the outermost coating include a runway or octagonal shape. Furthermore, the profiles on both sides of the outermost coating positioning surfaces are preferably asymmetrical, facilitating orientation identification during fiber ribbon assembly and reducing the possibility of flipping the upper and lower end faces due to positioning surface registration. A typical outer cross-sectional profile of the outermost coating is a ⌚-shaped profile, with the straight edge of one side of the positioning surface as the base, which facilitates neat arrangement and is a preferred solution.

[0034] For the glass portion of the hollow-core microstructured optical fiber, the positioning surface of the coating is used to match the azimuth angles between the optical fibers. The positioning surface of the coating must be ensured to be consistent with the orientation of the glass portion of the hollow-core microstructured optical fiber. In a preferred embodiment, the sleeve or the inner side of the sleeve of the hollow-core microstructured optical fiber has a mark, and the mark makes the end face of the hollow-core microstructured optical fiber asymmetric. Since the anti-resonance microstructure unit inside the optical fiber is not easy to observe, when assembling the optical fiber ribbon, as long as the marks of the multiple hollow-core microstructured optical fibers arranged side by side are in the same orientation relative to the arrangement direction of the optical fiber ribbon, the multiple hollow-core microstructured optical fibers arranged side by side can be fixed in the ribbon resin in the same orientation. By using this mark, not only can the orientation of the hollow-core microstructure be marked, but the anti-resonance microstructure can also be distinguished. For the hollow-core microstructured optical fibers produced by the same equipment and process, the error of the azimuth alignment can be controlled as much as possible, thereby improving batch consistency.

[0035] The mark has an identifiable outline in the end face image of the hollow-core microstructured optical fiber and can be a refractive index mark, a wavelength mark, or a structure mark;

[0036] The refractive index mark is a glass portion of the optical fiber whose material refractive index is different from that of the surrounding materials. Due to the difference in refractive index from the surrounding materials, its outline can be identified in the end face image of the hollow-core microstructured optical fiber when imaging with transmitted light or reflected light, and has identifiability;

[0037] The wavelength marker is a glass portion of the optical fiber whose transmittance to light of different wavelengths is different from that of the surrounding material. When the wavelength marker is imaged under illumination of light of different wavelengths or mixed light, the outline of the wavelength marker can be identified in the end face image of the hollow-core microstructured optical fiber and has identifiability.

[0038] The structural markers are recognizable in end-face images, including additive and subtractive structures within the hollow-core microstructured optical fiber cladding, which increase the asymmetry of the cladding and achieve recognition. The additive structures within the hollow-core microstructured optical fiber cladding include markers such as tubes, rods, and ridges; the subtractive structures within the hollow-core microstructured optical fiber cladding include markers such as grooves and drilled holes.

[0039] The positioning surfaces of adjacent hollow-core microstructure optical fibers are aligned and spliced ​​with each other, so that the plurality of hollow-core microstructure optical fibers arranged side by side are fixed in the ribbon resin in the same orientation.

[0040] Typical communication optical fibers have relatively perfect symmetry, with end-face structures consisting of nested circular cores and claddings. Rotating the end-face orientations does not significantly affect the splicing results, so fiber ribbon production does not consider orientation differences between parallel fibers. However, hollow-core microstructured fibers differ from circular core-clad fibers in that they possess perfect symmetry. The number of microstructures and the quality of their manufacturing affect their symmetry. Theoretically, the rotational symmetry of hollow-core microstructured fibers is related to the number of antiresonant microstructure units. Furthermore, since it is difficult to ensure that different antiresonant microstructure units have identical shape parameters during manufacturing, this further deteriorates symmetry. Therefore, orientation is a crucial factor in the splicing of antiresonant fibers. Typically, when splicing hollow-core microstructured fibers, the orientation of the fiber end faces on both sides must be adjusted to ensure that the hollow-core microstructure units are aligned as much as possible. For hollow-core microstructured fiber ribbons, poor orientation consistency between the hollow-core microstructured fibers can lead to compromised orientation matching during splicing, or even incomplete orientation matching. Therefore, for hollow-core microstructured optical fiber ribbon splicing, it is crucial that the ribbon maintains a consistent orientation relative to the optical fiber arrangement. The present invention first marks the orientation of the hollow-core microstructured optical fiber with positioning surfaces. By aligning the positioning surfaces, the multiple optical fibers within the hollow-core microstructured optical fiber ribbon maintain consistent orientation, enabling hollow-core microstructured optical fiber ribbon splicing.

[0041] In some embodiments, the optical fiber has one or more coating layers between the glass sleeve and the outermost coating layer; the coating layer or one of the coating layers has a color mark to distinguish different optical fibers.

[0042] The present invention provides a method for preparing a hollow-core microstructured optical fiber ribbon, comprising the following steps:

[0043] Multiple hollow-core microstructured optical fibers are arranged side by side so that the positioning surfaces of adjacent hollow-core microstructured optical fibers are aligned and spliced ​​with each other; the coatings of the hollow-core microstructured optical fibers have color markings, and the multiple hollow-core microstructured optical fibers are arranged side by side according to a preset color marking sequence.

[0044] A light-curable resin is coated on the outer sides of the plurality of hollow-core microstructure optical fibers arranged side by side and then cured to form a parallel resin, thereby fixing the positions of the plurality of hollow-core microstructure optical fibers.

[0045] The following are examples: Example 1

[0046] 1 , the four-core optical fiber ribbon provided in this embodiment comprises four hollow-core microstructured optical fibers with racetrack-shaped positioning surfaces.

[0047] The hollow core microstructure optical fiber has an end face structure as shown in FIG2 , comprising a sleeve cladding, a plurality of antiresonant microstructure units, and a coating; the outer contour of the cross section of the sleeve cladding is circular; the plurality of antiresonant microstructure units are distributed inside the sleeve cladding; the coating is coated on the sleeve cladding;

[0048] The inner wall of the sleeve cladding is provided with additive-assisted positioning marks 4, and the outer contour of the coating is runway-shaped, with a pair of parallel positioning surfaces 6. Five antiresonant microstructure units and asymmetric additive-assisted positioning marks 4 are arranged within the sleeve cladding. The antiresonant microstructure unit comprises a first antiresonant cladding ring 2 and a second antiresonant cladding ring 3 nested within the first antiresonant ring. The sleeve cladding 1 is wrapped with a coating 5 having positioning surfaces. The positioning surfaces 6 are asymmetric with the end face of the hollow-core microstructure fiber and have a defined geometric positional relationship with the additive-assisted positioning marks 4 on the inner wall of the cladding and the first antiresonant cladding ring 2. The first antiresonant cladding rings 2 are spaced apart from each other, evenly distributed circumferentially, and surround a core region 7.

[0049] The hollow-core microstructured optical fiber provided in this embodiment is prepared according to the following method:

[0050] The bare optical fiber of the hollow-core microstructure optical fiber obtained by drawing is coated once or multiple times through a coating mold. The optical fiber is fixed in position by a mark in the last coating. The mark 4 is adjusted to the same position, and the bare optical fiber passes through the runway-shaped coating mold in a preset posture, and is solidified to form a coating 5 with a runway-shaped profile, thereby obtaining the hollow-core microstructure optical fiber provided in this embodiment.

[0051] The hollow core microstructured optical fiber ribbon having a racetrack-shaped positioning surface and using subtractive assisted positioning marks differs from the additive assisted positioning only in the different marks.

[0052] The marks of the four side-by-side hollow-core microstructured optical fibers are in the same orientation relative to the arrangement direction of the optical fiber ribbon, that is, at the same height relative to one of the long sides of the optical fiber ribbon.

[0053] Each optical fiber has a different color coating for identification. Example 2

[0054] 3 , the four-core optical fiber ribbon provided in this embodiment comprises four hollow-core microstructured optical fibers with octagonal positioning surfaces.

[0055] The hollow core microstructure optical fiber has an end face structure as shown in FIG4 , comprising a sleeve cladding, a plurality of antiresonant microstructure units, and a coating; the outer contour of the cross section of the sleeve cladding is circular; the plurality of antiresonant microstructure units are distributed inside the sleeve cladding; the coating is coated on the sleeve cladding;

[0056] The inner wall of the sleeve cladding is provided with additively assisted positioning marks 4, and the outer contour of the coating is octagonal, with four pairs of parallel positioning surfaces 6. Five antiresonant microstructure units and asymmetric additively assisted positioning marks 4 are arranged within the sleeve cladding. The antiresonant microstructure unit comprises a first antiresonant cladding ring 2 and a second antiresonant cladding ring 3 nested within the first antiresonant ring. The sleeve cladding 1 is wrapped with a coating 5 having positioning surfaces. The positioning surfaces 6 are asymmetric with the end face of the hollow-core microstructure fiber and have a defined geometric positional relationship with the additively assisted positioning marks 4 on the inner wall of the cladding and the first antiresonant cladding ring 2. The first antiresonant cladding rings 2 are spaced apart from each other, evenly distributed circumferentially, and surround a core region 7.

[0057] The hollow-core microstructured optical fiber provided in this embodiment is prepared according to the following method:

[0058] The bare optical fiber of the hollow-core microstructure optical fiber obtained by drawing is coated once or multiple times through a coating mold. The optical fiber is fixed in position by a mark in the last coating. The mark 4 is adjusted to the same position, and the bare optical fiber passes through the octagonal coating mold in a preset posture and is cured to form a coating 5 with a runway-shaped profile, thereby obtaining the hollow-core microstructure optical fiber provided in this embodiment.

[0059] The hollow core microstructured optical fiber ribbon with an octagonal positioning surface and a subtractive assisted positioning mark differs from the additive assisted positioning only in the different marks.

[0060] One of the four pairs of positioning surfaces is selected for splicing, and the marks of the four side-by-side hollow-core microstructured optical fibers are in the same orientation relative to the arrangement direction of the optical fiber ribbon, that is, at the same height relative to one of the long sides of the optical fiber ribbon.

[0061] Each optical fiber has a different color coating for identification. Example 3

[0062] 5 , the four-core optical fiber ribbon provided in this embodiment comprises four hollow-core microstructured optical fibers with a ⌚-shaped positioning surface.

[0063] The hollow core microstructure optical fiber has an end face structure as shown in FIG6 , comprising a sleeve cladding, a plurality of antiresonant microstructure units, and a coating; the outer contour of the cross section of the sleeve cladding is circular; the plurality of antiresonant microstructure units are distributed inside the sleeve cladding; the coating is coated on the sleeve cladding;

[0064] The inner wall of the sleeve cladding has an additive-assisted positioning mark 4. The outer contour of the coating is in a C shape and has a pair of parallel positioning surfaces 6. Five anti-resonant microstructure units and an asymmetric additive-assisted positioning mark 4 are arranged inside the sleeve cladding. The anti-resonant microstructure unit has a first anti-resonant cladding ring 2 and a second anti-resonant cladding ring 3 nested inside the first anti-resonant ring. The sleeve cladding 1 is wrapped with a coating 5 having a positioning surface. The positioning surface 6 has asymmetry with respect to the end face of the hollow microstructure optical fiber. There is a definite geometric position relationship between the positioning surface, the additive-assisted positioning mark 4 on the inner wall of the cladding, and the first anti-resonant cladding ring 2. The first anti-resonant cladding rings 2 are spaced apart from each other and are evenly circumferentially distributed, and enclose to form a core region 7.

[0065] The hollow microstructure optical fiber provided in this embodiment is prepared according to the following method:

[0066] The bare fiber of the hollow microstructure optical fiber obtained by wire drawing is coated one or more times through a coating die. The last coating fixes the fiber with a mark. The mark 4 is adjusted to the same position, and the bare fiber passes through the C-shaped coating die in a preset posture, and is cured to form a coating 5 with a runway-shaped contour, thus obtaining the hollow microstructure optical fiber provided in this embodiment.

[0067] The difference between the hollow microstructure optical fiber ribbon with a C-shaped positioning surface and using a subtractive-assisted positioning mark and the additive-assisted positioning is only the difference in the mark.

[0068] The marks of 4并排设置的空芯微结构光纤 (the four并排设置的空芯微结构光纤 (并排 arranged side by side hollow microstructure optical fibers) are in the same orientation with respect to the arrangement direction of the optical fiber ribbon, that is, at the same height with respect to one of the long sides of the optical fiber ribbon. The plane of the C-shaped positioning surface faces down and is arranged side by side. On the one hand, it is convenient for the optical fibers to be neatly arranged side by side. On the other hand, it is not easy for the optical fibers to be reversed and mismatched.

[0069] Each optical fiber has a coating of a different color for marking.

[0070] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that the Chinese phrase "并排设置的空芯微结构光纤" in your original text seems to be an incomplete or incorrect expression. I translated it as "并排 arranged side by side hollow microstructure optical fibers" for the purpose of translation, but it may need to be adjusted according to the correct content.

Claims

1. A hollow core microstructure optical fiber ribbon, characterized in that: It includes multiple hollow microstructure optical fibers arranged side by side; the multiple hollow microstructure optical fibers have the same end face structure and are coated with a ribbon resin for fixing their positions. The hollow microstructure optical fiber includes a glass sleeve, multiple anti-resonant microstructure units, and an outermost coating; the outer contour of the cross-section of the glass sleeve is circular; the multiple anti-resonant microstructure units are distributed inside the glass sleeve; the outermost coating is coated on the glass sleeve. The outermost coating has at least a pair of parallel positioning surfaces, such that the outer contour of the cross-section of the hollow microstructure optical fiber is non-circular, and the relative positions of the positioning surfaces and the multiple anti-resonant microstructure units are consistent in the length direction. The positioning surfaces of adjacent hollow microstructure optical fibers are registered and spliced with each other, such that the multiple hollow microstructure optical fibers arranged side by side are fixed in the ribbon resin in the same orientation.

2. The hollow core microstructure optical fiber ribbon according to claim 1, characterized in that: The positioning surfaces are straight lines on the cross-section of the hollow microstructure optical fiber.

3. The hollow core microstructure optical fiber ribbon according to claim 1 or 2, characterized in that: The contours on both sides of the positioning surface of the outermost coating are asymmetrical.

4. The hollow core microstructure optical fiber ribbon according to claim 1 or 2, characterized in that: The outer contour of the cross-section of the optical fiber coating for making the fiber ribbon is a runway shape, an octagon, or a C shape.

5. The hollow core microstructure optical fiber ribbon according to claim 1 or 2, characterized in that: The sleeve or the inside of the sleeve of the hollow microstructure optical fiber has a mark, and the mark makes the end face of the hollow microstructure optical fiber asymmetrical.

6. The hollow core microstructure optical fiber ribbon according to claim 5, characterized in that: The marks of the multiple hollow microstructure optical fibers arranged side by side are in the same orientation relative to the arrangement direction of the fiber ribbon.

7. The hollow core microstructure optical fiber ribbon according to claim 1, characterized in that: There is one or more layers of coating between the glass sleeve and the outermost coating; the coating has a color mark.

8. A method for preparing a hollow core microstructure optical fiber ribbon according to any one of claims 1 to 7, characterized in that: It includes the following steps: Arrange multiple hollow microstructure optical fibers side by side, and register and splice the positioning surfaces of adjacent hollow microstructure optical fibers. On the outside of the multiple hollow microstructure optical fibers arranged side by side, apply and cure a photocurable resin to form a ribbon resin, and fix the positions of the multiple hollow microstructure optical fibers.

9. The method for preparing the hollow microstructure optical fiber ribbon according to claim 8, characterized in that: Make the marks of the multiple hollow microstructure optical fibers arranged side by side be in the same orientation relative to the arrangement direction of the fiber ribbon.

10. The method for preparing the hollow microstructure optical fiber ribbon according to claim 8, characterized in that: The coating of the hollow microstructure optical fiber has a color mark, and the multiple hollow microstructure optical fibers are arranged side by side in a preset color mark order.

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