Staggered-ring cladding hollow-core anti-resonance optical fiber and manufacturing method thereof

Abstract

The invention provides a staggered-ring cladding hollow-core anti-resonance optical fiber and a manufacturing method thereof, and belongs to the technical field of optical fibers. The optical fiber comprises a fiber core area formed by air, a plurality of anti-resonance tube units periodically arranged around the fiber core area, and a protective outer cladding covering the outside. Each anti-resonance tube unit comprises an outer cladding tube, a polygonal star-shaped inner supporting structure arranged in the outer cladding tube, and capillary tubes arranged in sub-regions divided by the inner supporting structure. The manufacturing method mainly comprises the following steps: preparing anti-resonance tube unit preforms, assembling and consolidating a plurality of unit preforms into a composite preform, carrying out wire drawing molding on the composite preform, coating the composite preform with a protective outer cladding, and the like. Accurate positioning and spatial arrangement of the capillary tubes are realized through the star-shaped inner support structure, and a strong and uniform anti-resonance interface can be constructed around the fiber core, so that the transmission bandwidth and the mode purity of the optical fiber are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of optical fiber technology, and more specifically to a fault-loop cladding hollow-core anti-resonant optical fiber and its manufacturing method. Background Technology

[0002] As optical communication systems continue to develop towards ultra-high speed and ultra-large capacity, the limitations of traditional silica optical fiber due to factors such as material nonlinearity, dispersion, and environmental stability are becoming increasingly prominent. Hollow-core optical fiber, using air as the light guiding medium, can significantly reduce nonlinear effects and material dispersion in principle, and is considered one of the key technologies to overcome existing transmission bottlenecks, especially suitable for high-power laser transmission and communication scenarios in harsh environments.

[0003] Among various hollow-core optical fibers, antiresonant hollow-core fiber has attracted much attention due to its low-loss potential. However, existing technologies mostly employ simple concentric tubes or finite nesting structures, which face inherent challenges in pursuing wider bandwidth and higher mode purity: increasing the number of resonant layers easily leads to structural redundancy and a decrease in the cladding air ratio, weakening the suppression capability of higher-order modes and increasing bending loss; at the same time, the precision manufacturing of complex structures places extremely high demands on the consistency of the fiber drawing process, restricting its large-scale application. Therefore, there is an urgent need in this field for a novel hollow-core optical fiber solution that can achieve synergistic optimization of bandwidth, mode purity, and process robustness in structural design. Summary of the Invention

[0004] This invention provides a hollow anti-resonant optical fiber with a staggered cladding and its manufacturing method, which solves the problems of bandwidth limitation, insufficient mode purity and difficulty in fabricating complex structures caused by the simple structure of the anti-resonant layer in the prior art.

[0005] To achieve the above objectives, one embodiment of the present invention provides a staggered cladding hollow-core anti-resonant optical fiber and a method for manufacturing the same, comprising: a core region composed of air; anti-resonant tube units, wherein a plurality of anti-resonant tube units are periodically arranged around the core region, each anti-resonant tube unit comprising an outer cladding tube, a polygonal star-shaped inner support structure, and a first capillary tube, wherein the polygonal star-shaped inner support structure is disposed inside the outer cladding tube, and the first capillary tube is disposed within a sub-region divided by the polygonal star-shaped inner support structure; and a protective outer cladding layer covering the outside of the anti-resonant tube units.

[0006] Furthermore, the outer wall of the first capillary is tangent to the two adjacent sides of the polygonal star-shaped inner support structure and the inner wall of the outer cladding tube.

[0007] Furthermore, the polygonal star-shaped inner support structure is a regular pentagonal star structure, which divides the internal space of the outer cladding tube into five triangular sub-regions, and the first capillary is provided in each sub-region.

[0008] Furthermore, the sub-regions of each triangle are congruent, and the diameters of each of the first capillaries are equal.

[0009] Furthermore, the anti-resonant tube unit also includes a second capillary tube, which is disposed in the corner region of a regular polygon defined by the internal contour of the polygonal star-shaped inner support structure.

[0010] Furthermore, the anti-resonance tube unit also includes a third capillary tube, which is disposed in the region near the connection point between the outer corner of the polygonal star-shaped inner support structure and the inner wall of the outer cladding tube.

[0011] Furthermore, multiple anti-resonant tube units are arranged in a polygonal or ring array around the fiber core region.

[0012] Furthermore, the protective outer layer is a polymer protective coating.

[0013] On the other hand, a method for manufacturing a staggered cladding hollow-core anti-resonant optical fiber is also provided, for use in the aforementioned staggered cladding hollow-core anti-resonant optical fiber. The manufacturing method includes: Step S1: preparing an anti-resonant tube unit preform, the anti-resonant tube unit preform comprising an outer cladding tube, a polygonal star-shaped inner support structure, and a first capillary, the polygonal star-shaped inner support structure being disposed inside the outer cladding tube, and the first capillary being disposed within a sub-region divided by the polygonal star-shaped inner support structure; Step S2: assembling and fixing multiple anti-resonant tube unit preforms around a central axis to form a composite preform; Step S3: drawing the composite preform to form an optical fiber prototype; Step S4: coating the surface of the optical fiber prototype with a protective outer cladding and curing it.

[0014] Furthermore, in step S1, a positioning fixture is used to make the outer wall of the first capillary tangent to the adjacent two sides of the polygonal star-shaped inner support structure and the inner wall of the outer cladding tube.

[0015] This invention provides a hollow-core antiresonant fiber with a staggered cladding. By introducing a modular cladding unit design of "star-shaped internal support structure + internally tangential capillary," it successfully resolves the contradictions between bandwidth, mode purity, and fabrication process in existing hollow-core antiresonant fibers. This structure utilizes a star-shaped skeleton to achieve precise positioning and optimized spatial arrangement of the capillary, constructing a strong, uniform, and highly symmetrical antiresonant interface around the fiber core. This significantly widens the low-loss transmission window and effectively suppresses higher-order modes. Simultaneously, the modular "unit-first, then overall" manufacturing strategy prioritizes the precision assembly of the complex structure, reducing the stringent requirements on the final fiber drawing process. This significantly improves the feasibility and consistency of fabricating complex fiber structures while ensuring high performance, providing a reliable optical waveguide foundation for next-generation ultra-high-speed optical communication and high-power laser transmission. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of a single-layer misloop fiber structure provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of another single-layer misloop fiber structure provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of another single-layer misloop fiber structure provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the double-layer misloop fiber structure provided in Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of another double-layer misloop fiber structure provided in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of another double-layer misloop fiber structure provided in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the three-layer staggered ring structure provided in Embodiment 3 of the present invention; Among them, 1. outer cladding layer; 2. fiber core region; 3. first capillary; 4. polygonal star-shaped inner support structure; 5. second capillary; 6. third capillary. Detailed Implementation

[0017] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0018] As optical fiber communication systems continue to evolve towards ultra-high speed and ultra-large capacity, the performance potential of hollow-core antiresonant optical fibers is becoming increasingly prominent. However, existing technologies struggle to construct high-density and spatially optimized antiresonant structures around the fiber core, generally facing core challenges such as the difficulty in balancing bandwidth expansion and mode purity, and the cumbersome and inconsistent fabrication processes for complex microstructures. Therefore, developing a novel hollow-core optical fiber design and fabrication method capable of achieving precise arrangement and efficient control of the antiresonant interface is crucial.

[0019] To address this issue, this invention proposes a staggered-loop cladding hollow-core anti-resonant optical fiber and its manufacturing method. By introducing a polygonal star-shaped internal support structure as a fixed skeleton, the interior of the cladding tube is divided into multiple regular sub-regions, providing a geometric basis for the precise positioning of the capillary glass tube. Utilizing the tangential relationship between the outer wall of the capillary tube and the star-shaped arms and the inner wall of the cladding tube, a high-symmetry construction of the anti-resonant unit is achieved, significantly enhancing the optical field confinement and mode control capabilities. Finally, by configuring single-layer, double-layer, or triple-layer capillary tubes in different sub-regions, flexible adjustment of the anti-resonance intensity and effective bandwidth expansion are achieved, providing a high-performance optical waveguide solution for next-generation high-speed optical communication systems.

[0020] The following is combined with Figures 1-7 This invention is described in detail.

[0021] Example 1 like Figures 1 to 3 As shown, this embodiment of the invention provides a staggered cladding hollow-core anti-resonant optical fiber and its manufacturing method, comprising: a core region 2, the core region 2 being composed of air; anti-resonant tube units, a plurality of anti-resonant tube units being periodically arranged around the core region 2, each anti-resonant tube unit including an outer cladding tube, a polygonal star-shaped inner support structure 4 and a first capillary tube 3, the polygonal star-shaped inner support structure 4 being disposed inside the outer cladding tube, and the first capillary tube 3 being disposed in a sub-region divided by the polygonal star-shaped inner support structure 4; and a protective outer cladding 1, the protective outer cladding 1 covering the outside of the anti-resonant tube units.

[0022] Specifically, the first capillary 3 can be disposed in other sub-regions divided by the pentagonal star structure 4 to achieve different optical properties, such as: Figure 2 As shown, the first capillary 3 can be positioned in the corner region of the regular pentagon formed by the inner contour of the regular polygonal star-shaped inner support structure 4. For example... Figure 3 As shown, the first capillary 3 can be positioned within a fan-shaped region near the connection point between each outer apex of the polygonal star-shaped inner support structure 4 and the inner wall of the outer cladding tube. The thickness of the wall of the polygonal star-shaped inner support structure 4 can be the same as the wall thickness of the capillary, or they can be designed independently to differ from each other according to different requirements, in order to meet specific mechanical support strength and optical anti-resonance effects.

[0023] This invention employs a modular design with a "polygonal star-shaped internal support structure 4 positioning the first capillary 3," forming a uniform and highly symmetrical anti-resonant interface around the fiber core. This structure effectively suppresses the excitation and transmission of higher-order modes, thereby achieving low-loss transmission of the fundamental mode optical field. Due to its simple structure, it reduces the stringent requirements for subsequent fiber drawing processes, exhibiting good process feasibility and consistency, and providing a feasible path for the large-scale production of high-performance hollow-core optical fibers.

[0024] Preferably, the outer wall of the first capillary 3 is tangent to the two adjacent sides of the polygonal star-shaped inner support structure 4 and the inner wall of the outer cladding tube.

[0025] Further preferably, the polygonal star-shaped inner support structure 4 is a regular pentagonal star structure, which divides the internal space of the outer cladding tube into five triangular sub-regions, and each sub-region is provided with a first capillary 3.

[0026] Further preferably, the sub-regions of each triangle are congruent, and the diameters of each first capillary 3 are equal.

[0027] Specifically, the first capillary 3 is preferably a quartz glass capillary with a circular cross-section. To ensure that its outer wall is simultaneously tangent to the adjacent two sides of the polygonal star-shaped inner support structure 4 and the inner wall of the outer cladding tube, the polygonal star-shaped inner support structure 4 is specifically designed as a regular pentagonal star structure. The five interior angles of this regular pentagonal star structure are all 36 degrees, dividing the internal space of the outer cladding tube into five congruent isosceles triangular sub-regions. Each triangle has two base angles of 72 degrees and a vertex angle of 36 degrees. The diameter of the first capillary 3 is precisely designed to be equal to the diameter of the inscribed circle of the triangle, with its center located at the center of the inscribed circle. During assembly, a positioning mold with a specific cavity is used to precisely constrain the first capillary 3 within the triangular sub-region, and micro-pressure is applied to ensure that its outer wall achieves gapless line contact with the three boundaries of the triangle—namely, the two arms of the regular pentagonal star structure and the inner wall of the outer cladding tube—thus forming a stable and precise tangential relationship. Each triangular subregion is congruent due to the symmetry of the regular pentagon, thus ensuring that the diameters of all five first capillaries 3 are also consistent, thus ensuring the uniformity of the anti-resonance interface.

[0028] The preferred embodiment of this invention provides a design scheme that ensures extremely high geometric symmetry and uniform distribution of the anti-resonant interface around the fiber core. This highly regular structure generates strong and consistent optical field modulation, thereby significantly improving the suppression capability of higher-order modes and achieving excellent mode purity. At the same time, symmetry helps reduce polarization-dependent loss and greatly reduces the sensitivity of the fiber's transmission characteristics to process fluctuations and external bending stress, ultimately achieving low-loss, high-stability single-mode transmission.

[0029] Preferably, multiple anti-resonant tube units are arranged in a polygonal or ring array around the fiber core region 2.

[0030] More preferably, the protective outer layer 1 is a polymer protective coating.

[0031] Specifically, the arrangement of multiple anti-resonant tube units around the fiber core region 2 can be selected according to the target optical performance. To achieve highly symmetrical optical field confinement, they can be arranged in a pentagonal array, where the centers of the five anti-resonant tube units are located at the five vertices of a regular pentagon. This structure provides good fivefold rotational symmetry. For higher symmetry or different performance, hexagonal or other polygonal arrays or ring arrays can also be used. When more emphasis is placed on process tolerance or specific mechanical properties, a ring array can be used, where the centers of multiple anti-resonant tube units are equally spaced on the same circumference. The function of the protective cladding layer 1 is to provide mechanical protection and environmental isolation for the internal precision anti-resonant structure. Its material is preferably a low-refractive-index, highly flexible UV-curable acrylate coating. This material is applied to the surface of the drawn fiber prototype through a dip-coating process and rapidly cured under UV light to form a dense and tough protective film. The coating thickness is typically on the order of tens to hundreds of micrometers to ensure sufficient mechanical strength while avoiding the introduction of excessive additional losses.

[0032] In preferred embodiments of this invention, the polygonal or ring array arrangement imparts higher symmetry and mechanical stability to the optical fiber structure, effectively resisting bending loss. Simultaneously, a specific polymer protective coating provides a robust physical barrier and environmental isolation for the internal precision structure. The combination of these two elements ensures the long-term reliability and durability of the optical fiber's transmission performance in complex environments.

[0033] This invention also provides a method for manufacturing a staggered cladding hollow-core anti-resonant optical fiber, used for the aforementioned staggered cladding hollow-core anti-resonant optical fiber. The manufacturing method includes: Step S1: Preparing an anti-resonant tube unit preform, the anti-resonant tube unit preform comprising an outer cladding tube, a polygonal star-shaped inner support structure 4, and a first capillary tube 3, the polygonal star-shaped inner support structure 4 being disposed inside the outer cladding tube, and the first capillary tube 3 being disposed within a sub-region divided by the polygonal star-shaped inner support structure 4; Step S2: Assembling and fixing multiple anti-resonant tube unit preforms around a central axis to form a composite preform; Step S3: Drawing the composite preform into a fiber prototype; Step S4: Coating the surface of the fiber prototype with a protective outer cladding 1 and curing it.

[0034] In step S1, a positioning fixture is used to make the outer wall of the first capillary 3 tangent to the adjacent two sides of the polygonal star-shaped inner support structure 4 and the inner wall of the outer cladding tube.

[0035] Specifically, the manufacturing process begins with the preparation of the anti-resonance tube unit preform. First, a high-purity quartz glass tube is selected as the outer cladding tube blank. Using ultra-precision laser processing or thermoforming technology, a polygonal star-shaped inner support structure 4 is integrally formed or subsequently fused into the tube blank. Subsequently, the key step is the positioning of the first capillary 3: a special positioning fixture made of high-strength ceramic or special alloy is used, which has a microstructure profile matching the target tangential position. Under an inert gas protective environment, a micro-manipulator precisely feeds the pre-drawn circular first capillary 3 into the fixture cavity for positioning, and a controllable slight pressure is applied to ensure that its outer wall fits seamlessly with the two arms of the star-shaped structure 4 and the inner wall of the outer cladding tube, thus forming a precise tangential relationship. Afterwards, the contact points are briefly melted by localized CO2 laser heating to achieve pre-fixation of the first capillary 3. After completing multiple such unit preforms, they are arranged in a polygonal array around a central quartz rod or tube, and temporarily fixed at both ends using high-temperature resistant clamps. The entire assembly is placed in a high-temperature furnace and shrunk at a temperature above the glass softening point, bonding the outer cladding tubes of adjacent units together to form a robust composite preform. Finally, the composite preform is heated and softened in a standard fiber drawing tower, and stretched to the desired diameter by controlling tension and speed to form a fiber optic prototype. Immediately afterward, a UV-curable acrylate is coated onto the surface of the fiber prototype as a protective outer cladding layer 1 and cured, thus completing the fiber manufacturing process.

[0036] Example 2 This embodiment enhances the single-layer structure of Embodiment 1, providing various double-layer staggered cladding hollow-core anti-resonant optical fibers. Its core lies in selectively combining two layers of capillaries within different sub-regions divided by the polygonal star-shaped inner support structure 4 to create a stronger anti-resonance effect.

[0037] Specifically, the fiber optic basic structure of this embodiment is the same as that of Embodiment 1, including a protective outer cladding 1, an air core region 2, and an anti-resonant tube unit composed of an outer cladding tube and a polygonal star-shaped inner support structure 4. The enhanced feature of this embodiment is that the anti-resonant tube unit includes two layers of capillaries, and the specific implementation methods include the following three: First implementation method: such as Figure 4 As shown, a first capillary tube 3 is disposed within the outer triangular sub-region of the regular pentagonal star structure, with its outer wall tangent to the star-shaped arm and the inner wall of the outer cladding tube. Simultaneously, a second capillary tube 5 is disposed within the corner region of the regular pentagon formed by the inner contour of the star structure, with its outer wall tangent to two adjacent sides of the regular pentagon. This structure forms two anti-resonant interfaces in the near field and mid field of the fiber core.

[0038] The second implementation method: as follows Figure 5As shown, a first capillary tube 3 is arranged in the outer triangular sub-region of the pentagonal star structure, and a second capillary tube 5 is arranged in the fan-shaped region near the connection point between the outer apex of the star structure and the inner wall of the outer cladding tube. This structure forms two anti-resonant interfaces at the mid-field of the fiber core and the edge of the cladding.

[0039] The third implementation method: such as Figure 6 As shown, a first capillary tube 3 is disposed in the corner region of the regular pentagon inside the regular pentagonal star structure, and a second capillary tube 5 is disposed in the fan-shaped region near the outer apex of the star structure. This structure forms two anti-resonant interfaces in the near field of the fiber core and the edge of the cladding.

[0040] By combining different bilayer capillary layers as described above, strong anti-resonant interfaces can be formed at different radial positions around the fiber core. These capillary layers located at different positions can produce a synergistic effect, and their reflection spectra superimpose, effectively widening the low-loss transmission window of the optical fiber. Simultaneously, the bilayer structure can more effectively suppress higher-order modes of different orders, thereby achieving better bandwidth and mode purity than a single-layer structure. Different combinations have their own focuses, providing flexibility for optimizing fiber design to meet specific application requirements, such as wider bandwidth and better bending performance. This embodiment fully demonstrates the scalability and design freedom of the invention's structure.

[0041] Example 3 This embodiment provides a three-layer staggered cladding hollow-core anti-resonant optical fiber with optimized performance. It maximizes the anti-resonance effect by setting capillaries in all available key sub-regions of the polygonal star-shaped inner support structure 4.

[0042] like Figure 7 As shown, specifically, the optical fiber in this embodiment, based on the double-layer capillary structure described in Embodiment 2, further adds a third layer of capillary. That is, each anti-resonant tube unit simultaneously includes a first capillary 3, a second capillary 5, and a third capillary 6. The first capillary 3 is disposed in the outer triangular sub-region enclosed by the two adjacent arms of the polygonal star-shaped inner support structure 4 and the inner wall of the outer cladding tube, and its outer wall is tangent to the star-shaped arms and the inner wall of the outer cladding tube. The second capillary 5 is disposed in the corner region of the regular pentagon defined by the inner contour of the polygonal star-shaped inner support structure 4, and its outer wall is tangent to two adjacent sides of the regular pentagon. The third capillary 6 is disposed in the fan-shaped region near the connection point between each outer apex corner of the polygonal star-shaped inner support structure 4 and the inner wall of the outer cladding tube. Multiple anti-resonant tube units containing three layers of capillary are arranged in a high-density ring array or polygonal array around the fiber core region 2. Finally, the entire structure is wrapped by the protective outer cladding 1, and after drawing, a three-layer staggered-ring hollow-core anti-resonant optical fiber is obtained.

[0043] This embodiment introduces a third capillary 6, forming strong anti-resonant interfaces at three radial positions around the fiber core: near-field, mid-field, and far-field. This dense and spatially optimized three-layer structure generates extremely powerful optical field confinement and mode manipulation capabilities. The anti-resonant frequencies generated by the capillaries at different positions can couple and superimpose, thus merging into an extremely wide and flat ultra-wide low-loss transmission window. Simultaneously, this structure achieves maximum suppression of higher-order modes, realizing near-ideal single-mode transmission characteristics. Despite its highly complex structure, this design is technologically feasible using the "unit prefabrication-overall assembly" method described in this invention. This embodiment is suitable for applications with extremely demanding performance requirements, such as ultra-high-speed coherent communication, quantum information transmission, and high-precision sensing systems.

[0044] In summary, the staggered cladding hollow-core antiresonant fiber provided by this invention, based on the core design of "star-shaped internal support structure with partitioned positioning capillary," successfully achieves on-demand customization and step-by-step optimization of the antiresonant performance of hollow-core fiber. This structure, by constructing a highly symmetrical and spatially controllable antiresonant interface around the fiber core, not only effectively broadens the low-loss bandwidth and significantly suppresses higher-order modes to improve mode purity, but also, through a "pre-fabrication of individual units followed by overall fiber drawing" manufacturing method, prioritizes the precise control of the complex structure, fundamentally resolving the contradiction between structural design and fabrication feasibility in high-performance hollow-core fiber. This provides a reliable and flexible solution to meet the stringent requirements of various scenarios, from conventional communication to ultra-high-speed, high-power transmission.

[0045] The above description is merely a preferred embodiment of the technical solution of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A misaligned ring-clad hollow-core anti-resonant optical fiber and a method of manufacturing the same, characterized in that, The application relates to a misaligned cladding hollow core anti-resonant optical fiber, comprising: a core region (2) composed of air; a plurality of anti-resonant tube units arranged periodically around the core region (2), each of the anti-resonant tube units comprising an outer cladding tube, a multi-angle star-shaped inner support structure (4) arranged inside the outer cladding tube, and a first capillary tube (3) arranged in a sub-region divided by the multi-angle star-shaped inner support structure (4); a protective outer cladding (1) covering the outside of the anti-resonant tube units.

2. The misrouted cladded hollow core anti-resonant optical fiber of claim 1, wherein, The outer wall of the first capillary tube (3) is tangent to the adjacent two sides of the multi-angle star-shaped inner support structure (4) and the inner wall of the outer cladding tube.

3. The misrouted cladded hollow core anti-resonant optical fiber of claim 2, wherein, The multi-angle star-shaped inner support structure (4) is a regular pentagonal star-shaped structure, which divides the inner space of the outer cladding tube into five triangular sub-regions, and each of the sub-regions is provided with the first capillary tube (3).

4. The misrouted cladded hollow core anti-resonant optical fiber of claim 3, wherein, Each of the triangular sub-regions is congruent, and the diameters of the first capillary tubes (3) are equal.

5. The misr ingly cladded hollow core anti-resonant optical fiber of claim 3, wherein, The anti-resonant tube unit further comprises a second capillary tube (5) arranged in a corner region of a regular polygon defined by the inner contour of the multi-angle star-shaped inner support structure (4).

6. The misrouted cladded hollow core anti-resonant optical fiber of claim 5, wherein, The anti-resonant tube unit further comprises a third capillary tube (6) arranged in a region near the connection point between the outer corner of the multi-angle star-shaped inner support structure (4) and the inner wall of the outer cladding tube.

7. The misrouted cladded hollow core anti-resonant optical fiber of claim 1, wherein, The plurality of anti-resonant tube units are arranged in a polygonal array or a ring array around the core region (2).

8. The misrouted cladded hollow core anti-resonant optical fiber of claim 1, wherein, The protective outer cladding (1) is a polymer protective coating.

9. A method of manufacturing a misaligned ring-clad hollow-core anti-resonant optical fiber, characterized by, A manufacturing method for the misaligned cladding hollow core anti-resonant optical fiber of any one of claims 1 to 8, the manufacturing method comprising: Step S1: preparing an anti-resonant tube unit preform rod comprising an outer cladding tube, a multi-angle star-shaped inner support structure (4) arranged inside the outer cladding tube, and a first capillary tube (3) arranged in a sub-region divided by the multi-angle star-shaped inner support structure (4); Step S2: assembling and consolidating a plurality of the anti-resonant tube unit preform rods around a center axis to form a composite preform rod; Step S3: performing wire drawing treatment on the composite preform rod to form a fiber preform; Step S4: coating a protective outer cladding (1) on the surface of the fiber preform and solidifying.

10. The manufacturing method according to claim 9, wherein In step S1, a positioning tool is used to make the outer wall of the first capillary tube (3) tangent to the adjacent two sides of the multi-angle star-shaped inner support structure (4) and the inner wall of the outer cladding tube.

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