Hollow-core microstructure optical fiber ribbon and preparation method thereof

Abstract

The invention discloses a hollow-core microstructure optical fiber ribbon and a preparation method thereof. The hollow-core microstructure optical fiber ribbon comprises a plurality of hollow-core microstructure optical fibers which are arranged side by side; the plurality of hollow-core microstructure optical fibers have the same end face structure and are coated with ribbon combining resin for fixing the positions of the hollow-core microstructure optical fibers; the plurality of anti-resonance microstructure units are distributed on the inner side of the glass sleeve; the glass sleeve is externally coated with the coating on the outermost side; the outermost coating is provided with at least one pair of parallel positioning surfaces; and the positioning surfaces of the adjacent hollow-core microstructure optical fibers are mutually registered and spliced, so that the plurality of hollow-core microstructure optical fibers which are arranged side by side are fixed in the ribbon combining resin in the same direction. According to the hollow-core microstructure optical fiber ribbon provided by the invention, the orientation of the hollow-core microstructure optical fiber is positioned through the non-circular optical fiber coating, and the optical fibers are arranged side by side through the parallel positioning surface, so that the end face orientations of all hollow-core structure optical fibers in the optical fiber ribbon are consistent, and therefore, the welding efficiency is improved, and the welding loss is reduced.

Description

Technical Field

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

[0002] Hollow microstructure optical fibers have ultra-low loss, low dispersion, low nonlinearity, and a propagation speed close to the speed of light. With the in-depth research on hollow fibers based on the anti-resonance principle, under reasonable structural design, hollow microstructure optical fibers can effectively reduce transmission loss, have the potential as ultra-long-distance communication optical fibers, and have the prospect of large-scale application. They are recognized as the optical fibers for the next-generation ultra-large-capacity, low-latency, high-speed optical communication systems.

[0003] Generally, the general user access network roughly consists of three parts of lines: feeder line, distribution line, and drop wire. Among these three parts of optical cables, the feeder line uses the largest number of cores, followed by the distribution line, and the drop wire has the least number. With the sharp increase in current data transmission requirements, optical cables are developing towards large core numbers and high fiber core densities. At the same time, to better reduce the splicing cost and splicing efficiency, the preferred structure mostly adopts fiber ribbon optical cables that can splice multiple optical fibers at one time. Because the core of traditional optical fibers is circular and the cladding is also circular, for the fiber ribbon made, only the core alignment of the optical fibers needs to be considered for splicing, and the splicing loss can be maintained at a low level. However, the current hollow microstructure optical fibers have rotational symmetry but do not have perfect circular symmetry. Therefore, they cannot be rotated randomly, otherwise the anti-resonance rings and the core regions cannot be well aligned, resulting in large splicing losses. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement requirements of the prior art, the present invention provides a hollow microstructure optical fiber ribbon and a preparation method thereof. The purpose is to splice hollow microstructure optical fibers with parallel positioning surfaces to keep the optical fibers arranged side by side in the fiber ribbon in the same orientation, so that each optical fiber in the fiber ribbon can match the anti-resonance microstructure during the splicing of the fiber ribbon, achieving precise end face matching, thereby solving the technical problems that it is difficult to match the end faces of each optical fiber in the hollow microstructure optical fiber ribbon one by one and the splicing loss of the hollow microstructure optical fiber ribbon is large.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a hollow microstructure optical fiber ribbon, which includes a plurality of hollow microstructure optical fibers arranged side by side; the plurality of hollow microstructure optical fibers have the same end face structure and are covered with a ribbon resin for fixing their positions;

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

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

[0008] 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.

[0009] Preferably, the positioning surface of the hollow-core microstructure optical fiber ribbon is a straight line on the cross section of the hollow-core microstructure optical fiber.

[0010] Preferably, the hollow-core microstructure optical fiber ribbon has asymmetric profiles on both sides of the outermost coating positioning surface.

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

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

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

[0014] Preferably, the hollow-core microstructure optical fiber ribbon has one or more coatings between the glass sleeve and the outermost coating; and the coatings have color markings.

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

[0016] Arranging a plurality of hollow-core microstructure optical fibers side by side so that the positioning surfaces of adjacent hollow-core microstructure optical fibers are aligned and spliced ​​with each other;

[0017] The outer sides of the plurality of hollow-core microstructure optical fibers arranged side by side are coated with a photocurable resin and cured to form a parallel band resin, so that the positions of the plurality of hollow-core microstructure optical fibers are fixed.

[0018] Preferably, the method for preparing the hollow-core microstructure optical fiber ribbon is such that the marks of the plurality of hollow-core 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 mark, and the multiple hollow microstructure optical fibers are arranged side by side in a preset order of color marks.

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

[0021] The hollow microstructure optical fiber ribbon provided by the present invention locates the orientation of the hollow microstructure optical fiber through the non-circular optical fiber coating, and arranges the optical fibers 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 one by one during the fusion splicing of the optical fiber ribbon, thereby improving the fusion splicing efficiency and reducing the fusion splicing loss.

[0022] In a preferred solution, through the marking of the hollow microstructure optical fiber, the geometric position of the mark and the positioning surface of the optical fiber coating is always kept consistent in the length direction and is in the same orientation relative to the arrangement direction of the optical fiber ribbon, so that the hollow microstructure optical fibers with a rotationally symmetric coating can also ensure consistent orientation in the optical fiber ribbon. For example, the hollow microstructure optical fiber with an octagonal coating. Description of the Drawings

[0023] Figure 1 FIG. 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 runway-shaped outer contour;

[0024] Figure 2 FIG. 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 runway-shaped outer contour;

[0025] Figure 3 FIG. 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] Figure 4 FIG. 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] Figure 5 FIG. 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] Figure 6 FIG. 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, wherein: 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 tape resin. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used 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 can be combined with each other as long as they do not conflict with each other.

[0031] The hollow-core microstructure optical fiber ribbon provided by the present invention comprises a plurality of hollow-core microstructure optical fibers arranged side by side; the plurality of hollow-core microstructure 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 comprises a glass sleeve, a plurality of anti-resonance microstructure units, and an outermost coating; the outer contour of the cross section of the glass sleeve is circular; the plurality of anti-resonance 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, so that the outer contour of the cross section of the hollow-core microstructure fiber is non-circular, and the positioning surface is consistent with the relative position of the multiple anti-resonance microstructure units in the length direction. To achieve mutual registration, the positioning surface on one side of the optical fiber can be spliced ​​with the positioning surface on the other side of the adjacent optical fiber. The positioning surface can present a >-shaped contour on the cross section of the hollow-core microstructure fiber, with one side convex and the other side concave so as to cooperate with each other. In order to facilitate processing, the positioning surface is preferably a straight line on the cross section of the hollow-core microstructure fiber, which can not only match each other and align, but also improve the flatness of the optical fiber ribbon by fine-tuning, avoiding the situation where the height of the optical fiber in the optical fiber ribbon is inconsistent due to processing accuracy. The outer contour of the cross section of the outermost coating is preferably a runway shape or an octagon. Further, the contours on both sides of the positioning surface of the outermost coating are preferably asymmetric, which is convenient for orientation identification during assembly of the optical fiber ribbon and reduces the situation where the upper and lower end faces are flipped due to the registration of the positioning surface. The typical outer contour of the cross section of the outermost coating is a 匚-shaped, and the contour is based on the straight edge of one side of the positioning surface, which is conveniently arranged neatly, which is a preferred solution.

[0034] For the glass part of the hollow-core microstructure optical fiber, the positioning surface of the coating is used to match the azimuth angle between the optical fibers. The positioning surface of the coating must be ensured to be consistent with the azimuth of the glass part of the hollow-core microstructure optical fiber. In a preferred embodiment, 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 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 microstructure 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 microstructure optical fibers arranged side by side can be fixed in the ribbon resin in the same orientation. By using this mark, not only the orientation of the hollow-core microstructure can be marked, but also the anti-resonance microstructure can be distinguished. For the hollow-core microstructure optical fibers produced by the same equipment process, the error of the azimuth alignment can be controlled as much as possible to improve the batch consistency.

[0035] The mark has an identifiable outline in the end face image of the hollow core microstructure optical fiber, and may 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 glass portion whose material refractive index is different from that of the surrounding materials. Since the refractive index is different from that of the surrounding materials, its outline can be identified in the end face image of the hollow-core microstructure optical fiber when the transmitted light or reflected light is imaged, and it has recognizability;

[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 outline of the wavelength marker is imaged under illumination of light of different wavelengths or mixed light, the end face image of the hollow-core microstructure optical fiber can be identified and has recognizability.

[0038] The structural mark is a shape structure that is recognizable in the end face image, including the additive structure of the hollow core microstructure fiber cladding and the subtractive structure of the hollow core microstructure fiber cladding, thereby increasing the asymmetry of the cladding to achieve the purpose of recognition. The additive structure of the hollow core microstructure fiber cladding is, for example, a tube, rod, ridge or other marker added to the cladding; the subtractive structure of the hollow core microstructure fiber cladding is, for example, a groove, a drill hole or other marker structure.

[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] General communication optical fibers have relatively perfect symmetry, with an end face structure of nested circular cores and circular claddings. No matter how the end face orientation is rotated, the splicing effect cannot be significantly affected. Therefore, when making fiber ribbons, the orientation differences between the side-by-side arranged optical fibers are not considered. However, hollow-core microstructure optical fibers are different from circular core-cladding optical fibers with perfect symmetry. The number and manufacturing quality of their microstructures affect their symmetry. Theoretically, hollow-core microstructure optical fibers have rotational symmetry, which is related to the number of their anti-resonant microstructure units. At the same time, since it is difficult to ensure that different anti-resonant microstructure units have exactly the same shape parameters during manufacturing, this further leads to the deterioration of symmetry. Therefore, orientation is one of the non-negligible influencing factors for splicing anti-resonant optical fibers. Usually, when splicing hollow-core microstructure optical fibers, the orientations of the end faces of the two-side optical fibers need to be adjusted to align the hollow-core microstructure units of the optical fibers as much as possible. For a hollow-core microstructure fiber ribbon, if the orientation consistency between the hollow-core microstructure optical fibers is poor, it will lead to a situation where it is difficult to take care of both sides when matching the orientation during fiber ribbon splicing, and even the orientation cannot be well matched. Therefore, for the splicing of hollow-core microstructure fiber ribbons, it is crucial that the fiber ribbon has a consistent orientation relative to the fiber arrangement direction. The present invention first marks the orientation of the hollow-core microstructure optical fiber through a positioning surface, and uses the registration between the positioning surfaces to keep the orientations of multiple optical fibers in the hollow-core microstructure fiber ribbon consistent, so as to achieve the splicing of the hollow-core microstructure optical fiber into a fiber ribbon.

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

[0042] The method for preparing a hollow-core microstructure fiber ribbon provided by the present invention includes the following steps:

[0043] Arrange multiple hollow-core microstructure optical fibers side by side, and register and splice the positioning surfaces of adjacent hollow-core microstructure optical fibers; the coating of the hollow-core microstructure optical fiber has a color mark, and the multiple hollow-core microstructure optical fibers are arranged side by side in a preset color mark order.

[0044] Apply and cure a photocurable resin outside the multiple side-by-side arranged hollow-core microstructure optical fibers to form a ribbon resin and fix the positions of the multiple hollow-core microstructure optical fibers.

[0045] The following are embodiments:

[0046] Embodiment 1

[0047] See Figure 1 , the 4-core fiber ribbon provided in this embodiment is composed of 4 hollow-core microstructure optical fibers with runway-shaped positioning surfaces.

[0048] The hollow-core microstructure optical fiber has an end face structure as Figure 2As shown, it includes a sleeve cladding, a plurality of anti-resonance microstructure units, and a coating; the outer contour of the cross section of the sleeve cladding is circular; the plurality of anti-resonance microstructure units are distributed on the inner side of the sleeve cladding; the coating is coated on the sleeve cladding;

[0049] The inner wall of the sleeve cladding has an additive auxiliary positioning mark 4, and the outer contour of the coating is in the shape of a racetrack, with a pair of parallel positioning surfaces 6. Five anti-resonance microstructure units and asymmetric additive auxiliary positioning marks 4 are arranged in the sleeve cladding. The anti-resonance microstructure unit has a first anti-resonance cladding ring 2 and a second anti-resonance cladding ring 3 nested in the first anti-resonance ring. The sleeve cladding 1 is wrapped with a coating 5 with a positioning surface. The positioning surface 6 is asymmetric with the end face of the hollow-core microstructure optical fiber, and the positioning surface has a definite geometric position relationship with the additive auxiliary positioning mark 4 on the inner wall of the cladding and the first anti-resonance cladding ring 2. The first anti-resonance cladding rings 2 are spaced from each other, evenly distributed circumferentially, and surround a core region 7.

[0050] The hollow core microstructure optical fiber provided in this embodiment is prepared according to the following method:

[0051] 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 last coating makes the optical fiber fixed in position by a mark. The mark 4 is adjusted to the same position, and the bare optical fiber passes through the racetrack-shaped coating mold in a preset posture, and is solidified to form a coating 5 with a racetrack-shaped profile, thereby obtaining the hollow-core microstructure optical fiber provided in this embodiment.

[0052] The hollow core microstructured optical fiber ribbon with a racetrack-shaped positioning surface and using subtractive assisted positioning marks differs from the additive assisted positioning only in the different marks.

[0053] The marks of the four hollow-core microstructure optical fibers arranged side by side 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.

[0054] Each optical fiber has a different color coating for identification.

[0055] Example 2

[0056] See also Figure 3 The 4-core optical fiber ribbon provided in this embodiment is composed of 4 hollow-core microstructure optical fibers with octagonal positioning surfaces.

[0057] The hollow core microstructure optical fiber has an end face structure such as Figure 4 As shown, it includes a sleeve cladding, a plurality of anti-resonance microstructure units, and a coating; the outer contour of the cross section of the sleeve cladding is circular; the plurality of anti-resonance microstructure units are distributed on the inner side of the sleeve cladding; the coating is coated on the sleeve cladding;

[0058] The inner wall of the sleeve cladding has an additive auxiliary positioning mark 4, and the outer contour of the coating is an octagon with four pairs of parallel positioning surfaces 6. Five anti-resonance microstructure units and asymmetric additive auxiliary positioning marks 4 are arranged in the sleeve cladding. The anti-resonance microstructure unit has a first anti-resonance cladding ring 2 and a second anti-resonance cladding ring 3 nested in the first anti-resonance ring. The sleeve cladding 1 is wrapped with a coating 5 with a positioning surface. The positioning surface 6 is asymmetric with the end face of the hollow-core microstructure optical fiber, and the positioning surface has a definite geometric position relationship with the additive auxiliary positioning mark 4 on the inner wall of the cladding and the first anti-resonance cladding ring 2. The first anti-resonance cladding rings 2 are spaced from each other, evenly distributed circumferentially, and surround a core region 7.

[0059] The hollow core microstructure optical fiber provided in this embodiment is prepared according to the following method:

[0060] 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 last coating makes the optical fiber fixed in position by a mark. 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 solidified to form a coating 5 with a runway-shaped profile, thereby obtaining the hollow-core microstructure optical fiber provided in this embodiment.

[0061] The hollow core microstructured optical fiber ribbon with an octagonal positioning surface and a subtractive assisted positioning mark is different from the additive assisted positioning only in the different marks.

[0062] One pair of the four pairs of positioning surfaces is selected for splicing, and the marks of the four side-by-side hollow-core microstructure 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.

[0063] Each optical fiber has a different color coating for identification.

[0064] Example 3

[0065] See also Figure 5 The 4-core optical fiber ribbon provided in this embodiment is composed of 4 hollow-core microstructure optical fibers with a 匚-shaped positioning surface.

[0066] The hollow core microstructure optical fiber has an end face structure such as Figure 6 As shown, it includes a sleeve cladding, a plurality of anti-resonance microstructure units, and a coating; the outer contour of the cross section of the sleeve cladding is circular; the plurality of anti-resonance microstructure units are distributed on the inner side of the sleeve cladding; the coating is coated on the sleeve cladding;

[0067] The inner wall of the sleeve cladding has an additive auxiliary positioning mark 4, and the outer contour of the coating is a 匚 shape with a pair of parallel positioning surfaces 6. Five anti-resonance microstructure units and asymmetric additive auxiliary positioning marks 4 are arranged in the sleeve cladding. The anti-resonance microstructure unit has a first anti-resonance cladding ring 2 and a second anti-resonance cladding ring 3 nested in the first anti-resonance ring. The sleeve cladding 1 is wrapped with a coating 5 with a positioning surface. The positioning surface 6 is asymmetric with the end face of the hollow-core microstructure optical fiber, and the positioning surface has a definite geometric position relationship with the additive auxiliary positioning mark 4 on the inner wall of the cladding and the first anti-resonance cladding ring 2. The first anti-resonance cladding rings 2 are spaced from each other, evenly distributed circumferentially, and surround to form a core region 7.

[0068] The hollow core microstructure optical fiber provided in this embodiment is prepared according to the following method:

[0069] 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 last coating makes the optical fiber fixed in position by a mark. The mark 4 is adjusted to the same position, and the bare optical fiber passes through the 匚-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.

[0070] The hollow core microstructure optical fiber ribbon with a 匚-shaped positioning surface and a subtractive assisted positioning mark is different from the additive assisted positioning only in the different marks.

[0071] The markings 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, and are arranged side by side with the plane of the 匚-shaped positioning surface facing downward. On the one hand, it is convenient for the optical fibers to be arranged neatly side by side, and on the other hand, the optical fibers are not prone to inversion and mismatch.

[0072] Each optical fiber has a different color coating for identification.

[0073] It will be easily understood by those skilled in the art 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 substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air-core microstructure optical fiber ribbon, characterized in that, It includes multiple hollow-core microstructure optical fibers arranged side by side; the multiple hollow-core microstructure optical fibers have the same end face structure and are covered with a ribbon resin for fixing their positions. The hollow-core 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 covered 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-core 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-core microstructure optical fibers are registered and spliced with each other, such that the multiple hollow-core 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, wherein, The positioning surfaces are straight lines on the cross-section of the hollow-core 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 forming 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-core microstructure optical fiber has a mark, and the mark makes the end face of the hollow-core 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-core 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, wherein, There is one or more layers of coatings between the glass sleeve and the outermost coating; the coatings have color marks.

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-core microstructure optical fibers side by side, and register and splice the positioning surfaces of adjacent hollow-core microstructure optical fibers with each other. Coat and cure a photocurable resin outside the multiple hollow-core microstructure optical fibers arranged side by side to form a ribbon resin, and fix the positions of the multiple hollow-core microstructure optical fibers.

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

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