A hollow and solid core fiber hybrid fiber bundle and optical cable comprising the same

Abstract

The application discloses a kind of hollow and solid core fiber hybrid fiber bundle and cable comprising it, belong to optical fiber communication technical field, including hollow optical fiber, solid core optical fiber (solid core optical fiber can be G.652D, G.654E or G.655 etc.), first layer resin and second layer resin;It is arranged at the center position of fiber bundle by hollow optical fiber, to ensure that the bending radius of hollow optical fiber is maximum when fiber bundle bends, reduce the bending loss of hollow optical fiber, while a layer of low modulus resin is coated on the outer periphery of hollow optical fiber to reduce the bending stress of hollow optical fiber;At the same time, high modulus resin is filled in the outer periphery of low modulus resin to ensure the mechanical properties of fiber bundle, and the multiple solid core optical fibers mixed in the fiber bundle are arranged as annular distribution on the outer side of hollow optical fiber by setting, to protect the middle hollow optical fiber by solid core optical fiber, further improve the mechanical strength of the whole fiber bundle.

Description

Technical Field

[0001] This invention belongs to the field of optical fiber communication technology, specifically relating to a hybrid optical fiber bundle of hollow and solid optical fibers and an optical cable containing therein. Background Technology

[0002] Currently, most optical fibers used for communication are solid-core fibers. However, the transmission rate of solid-core fibers is limited by the nonlinear effects of the glass material itself, and there is a threshold for transmission power. Furthermore, the speed of light in glass is approximately two-thirds that in a vacuum, making it difficult to further reduce its inherent transmission latency. With the exponential growth in requirements for information transmission capacity, speed, and quality from emerging fields such as high-frequency financial trading, hyperscale data center interconnection, artificial intelligence computing clusters, real-time big data processing, and cloud computing, the bottlenecks of existing solid-core fiber technology in terms of low latency and high power carrying capacity are becoming increasingly prominent.

[0003] To overcome the aforementioned physical limitations, hollow-core optical fiber, using air as the transmission medium, was developed. Hollow-core optical fiber confines light within an air core through microstructures such as photonic bandgap or anti-resonance. Since the speed of light in air is close to the speed of light in a vacuum, and air exhibits extremely low nonlinear effects, hollow-core optical fiber theoretically possesses significant advantages such as ultra-low transmission delay, extremely low nonlinear attenuation, and a high laser damage threshold. These characteristics make it extremely promising for applications in specific scenarios where there is an urgent need to reduce transmission delay and carry extremely high optical power.

[0004] However, due to the complex structure of hollow optical fibers, structural stress and micro-loss defects are easily introduced during manufacturing and cabling. Compared to solid optical fibers with uniform structure, hollow optical fibers are more sensitive to bending, and their additional bending loss is significantly higher than that of solid optical fibers at the same bending radius, and the additional attenuation during cabling is also greater. Summary of the Invention

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a hybrid fiber bundle of hollow and solid optical fibers and an optical cable containing the bundle, which can realize the co-mixing of hollow and solid optical fibers, greatly reduce the bending stress of hollow optical fibers, and ensure the mechanical properties of hollow optical fibers.

[0006] To achieve the above objectives, one aspect of the present invention provides a hybrid fiber bundle of hollow and solid optical fibers, comprising hollow optical fibers, solid optical fibers, a first layer of resin, and a second layer of resin.

[0007] The hollow optical fiber is configured as at least one and is positioned at the center of the optical fiber bundle;

[0008] The solid optical fiber is configured as multiple fibers, and is distributed circumferentially at intervals on the outside of the hollow optical fiber.

[0009] The first layer of resin is wrapped around the outer periphery of at least one of the hollow optical fibers, and the elastic modulus of the first layer of resin is 50~200 MPa;

[0010] The second layer of resin is wrapped around the outer periphery of the first layer of resin, and the solid optical fiber is embedded in the second layer of resin. The elastic modulus of the second layer of resin is 500~1000 MPa.

[0011] As a further improvement of the present invention, the thickness of the first resin layer is 20~40um, and the cross-sectional area of ​​the second resin layer accounts for 40%~60% of the total cross-sectional area of ​​the optical fiber bundle.

[0012] As a further improvement of the present invention, the first layer resin comprises: 20-50 parts of a first prepolymer, 30-50 parts of a first diluent, and 1-5 parts of a first additive; the second layer resin comprises: 50-85 parts of a second prepolymer, 15-30 parts of a second diluent, and 1-5 parts of a second additive.

[0013] As a further improvement of the present invention, the first prepolymer is one or more of polyurethane acrylate and polyester acrylate; the first diluent and the second diluent are monofunctional or difunctional acrylates.

[0014] The second prepolymer is one or more of epoxy acrylate and polyester acrylate; the second diluent is a difunctional or multifunctional acrylate.

[0015] The first additive and the second additive are one or more of the following: defoamer and leveling agent.

[0016] As a further improvement of the present invention, the distance between two adjacent solid optical fibers is 20~80um, and the distance between the outer wall of the solid optical fiber and the outer wall of the first resin layer is 20~50um.

[0017] As a further improvement of the present invention, the diameter of the hollow optical fiber is 200~400um, the diameter of the solid optical fiber is 160~250um, and the diameter of the optical fiber bundle is 800~1300um.

[0018] As a further improvement of the present invention, the first layer of resin extends continuously along the longitudinal direction of the optical fiber bundle or is spaced out in multiple segments; and / or, the second layer of resin extends continuously along the longitudinal direction of the optical fiber bundle or is spaced out in multiple segments.

[0019] In another aspect, the present invention provides a hybrid optical cable of hollow and solid optical fibers, comprising the above-described hybrid optical fiber bundle of hollow and solid optical fibers.

[0020] As a further improvement of the present invention, the hybrid optical cable also includes a water-blocking material, a reinforcing member, and a sheath;

[0021] The hybrid optical fiber bundle is configured as multiple strands, and the water-blocking material covers the outer periphery of the multiple hybrid optical fiber bundles; the sheath covers the outer periphery of the water-blocking material, and the reinforcing member is embedded in the outer sheath.

[0022] As a further improvement of the present invention, the duty cycle of the hybrid optical fiber bundle under the inner circle of the water-blocking material is not greater than 50%;

[0023] The ratio of the diameter of the space formed by the water-blocking material coating to the diameter of the cable core formed by the stranding of the optical fiber bundle is greater than 1.25;

[0024] The excess length of the hybrid optical fiber bundle in the hybrid optical cable is 0.05% to 0.5%.

[0025] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0026] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0027] (1) The hollow and solid fiber hybrid fiber bundle of the present invention has hollow fiber set at the center of the fiber bundle to ensure that the bending radius of the hollow fiber is maximized when the fiber bundle is bent, thereby reducing the bending loss of the hollow fiber. At the same time, a layer of low modulus resin is wrapped around the hollow fiber to reduce the bending stress of the hollow fiber. Meanwhile, high modulus resin is filled around the low modulus resin to ensure the mechanical properties of the fiber bundle. Furthermore, multiple solid fibers mixed in the fiber bundle are arranged in a circumferential distribution on the outside of the hollow fiber to protect the hollow fiber in the middle through the solid fiber, thereby further improving the overall mechanical strength of the fiber bundle.

[0028] (2) The hollow and solid fiber hybrid fiber bundle of the present invention ensures that the outer layer of the fiber bundle has sufficient mechanical strength by setting the spacing between the solid fiber and the first layer of resin between 20 and 50 μm; and by setting the spacing between two adjacent solid fibers arranged in a circumferential manner between 20 and 80 μm to ensure that the separation of the fiber does not affect the surrounding fiber, while avoiding excessive filling of high modulus resin leading to excessive shrinkage stress.

[0029] (3) The hybrid optical fiber cable of the present invention is characterized by covering the hybrid optical fiber bundle with water-blocking material, and setting the duty cycle of the hybrid optical fiber bundle under the inner circle formed by the water-blocking material to be no more than 50%, setting the ratio of the diameter of the space formed by the water-blocking material to the diameter of the cable core formed by the twisting of the optical fiber bundle to be greater than 1.25, and setting the excess length of the hybrid optical fiber bundle in the hybrid optical cable to be 0.05%~0.5%, so that the optical fiber bundle has sufficient movement space and sliding length when the optical cable is bent, so as to reduce its own bending radius through the movement of the optical fiber bundle, thereby reducing the bending stress. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic cross-sectional view of a hybrid fiber bundle containing hollow and solid optical fibers in an embodiment of the present invention.

[0032] Figure 2 This is a schematic cross-sectional view of a hybrid optical cable containing hollow and solid optical fibers in an embodiment of the present invention.

[0033] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1, fiber bundle; 101, hollow fiber; 102, solid fiber; 103, first layer of resin; 104, second layer of resin; 2, water-blocking material; 3, reinforcing member; 4, outer sheath. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Example:

[0040] Please see Figures 1-2In a preferred embodiment of the present invention, the hybrid fiber bundle of hollow and solid optical fibers includes a hollow optical fiber 101, a solid optical fiber 102, a first layer of resin 103, and a second layer of resin 104. At least one hollow optical fiber 101 is provided, the first layer of resin 103 covers the outer periphery of at least one hollow optical fiber 101, the second layer of resin 104 wraps around the outer periphery of the first layer of resin 103, and the solid optical fiber 102 is embedded within the second layer of resin 104. The solid optical fiber can be G.652D, G.654E, or G.655, etc.

[0041] Specifically, in the preferred embodiment of the present invention, the hollow fiber 101 is disposed at the center of the fiber bundle 1, so that when the fiber bundle 1 bends, the bending radius of the hollow fiber 101 is maximized, thereby reducing the bending loss of the hollow fiber 101.

[0042] Furthermore, in the preferred embodiment of the present invention, the first layer of resin 103 is a low-modulus resin with an elastic modulus of 50~200MPa and a thickness of 20~40um, so as to provide a buffer for the hollow optical fiber 101 through the low-modulus resin, reduce bending stress, and thus reduce bending loss.

[0043] Preferably, the precursor components of the first layer resin 103 include: 20-50 parts of a first prepolymer, 30-50 parts of a first diluent, and 1-5 parts of a first additive; wherein the first prepolymer can be one or more of polyurethane acrylate and polyester acrylate; the first diluent is a monofunctional or bifunctional acrylate; and the first additive is one or more of an defoamer and a leveling agent.

[0044] In actual production, the aforementioned precursor coated on the hollow optical fiber 101 can be cured by photocuring to form the first layer of resin 103. By controlling the content of each component in the precursor, the elastic modulus of the first layer of resin 103 formed after curing is in the range of 50~200MPa.

[0045] Furthermore, in a preferred embodiment of the present invention, the second resin layer 104 is disposed on the outer periphery of the first resin layer 103. The second resin layer 104 is a high-modulus resin with an elastic modulus of 500~1000MPa, providing the necessary mechanical strength for the optical fiber bundle 1. More preferably, the cross-sectional area of ​​the second resin layer 104 accounts for 40%~60% of the total cross-sectional area of ​​the optical fiber bundle 1, so as to ensure mechanical performance while avoiding excessive mechanical stress caused by excessive shrinkage stress of the second resin layer 104, thereby reducing optical fiber signal attenuation.

[0046] Preferably, the precursor components of the second layer resin 104 include: 50-85 parts of a second prepolymer, 15-30 parts of a second diluent, and 1-5 parts of a second additive; wherein the second prepolymer can be one or more of epoxy acrylate and polyester acrylate; the second diluent is a bifunctional or multifunctional acrylate; and the second additive is one or more of defoamer and leveling agent.

[0047] Furthermore, in the preferred embodiment of the present invention, multiple solid optical fibers 102 are distributed circumferentially at intervals on the outside of hollow optical fibers 101 and embedded in the second layer of resin 104, realizing the hybrid cabling of hollow optical fibers 101 and solid optical fibers 102. The purpose is twofold: firstly, the use of hollow optical fibers 101 is not yet widespread, and existing equipment may not be compatible with them; by co-producing hollow optical fibers 101 and solid optical fibers 102, network services can be provided using solid optical fibers 102 initially, while hollow optical fibers 101 are laid in advance. When installed in network cabling, hollow fiber 101 can quickly replace solid fiber 102 as related equipment and services become more widespread. This improves network transmission efficiency and power without the need for additional hollow fiber 101 installations, effectively saving pipeline resources. Furthermore, if hollow fiber 101 is damaged or malfunctions during its replacement of solid fiber 102, network access can be quickly restored by connecting solid fiber 102, saving the waiting time for testing, repairing, and reconnecting hollow fiber 101.

[0048] In addition, multiple solid optical fibers 102 in this application are distributed circumferentially on the outside of hollow optical fiber 101 to protect the central hollow optical fiber 101 and further improve the mechanical properties of the outside of hollow optical fiber 101.

[0049] Preferably, the distance d1 between the outer wall of the solid optical fiber 102 and the outer wall of the first resin layer 103 is 20~50um, to avoid insufficient high-modulus resin between the solid optical fiber 102 and the first resin layer 103, so as to ensure that the outer layer of the hollow optical fiber 101 has sufficient mechanical strength.

[0050] Preferably, the spacing d2 between two adjacent solid optical fibers 102 is 20~80um to avoid excessively large spacing, which would result in too much filling resin and excessive shrinkage stress, and to avoid excessively small spacing, which would affect the surrounding optical fibers during fiber separation and cause the surrounding optical fibers to peel off.

[0051] Preferably, the hollow fiber 101 in this embodiment of the invention is an anti-resonant hollow fiber with a diameter preferably of 200~400um and a fiber microbending performance ≤8dB / km under the IEC TR 62221 measurement standard; the solid fiber 102 is a single-mode fiber, wherein the single-mode fiber can be of type G652D, G654E, G.655, G657A, etc., with a diameter preferably of 160~250um, and the diameter of the solid fiber 102 is not greater than the diameter of the hollow fiber 101.

[0052] Preferably, the diameter of the fiber bundle 1 is 0.8~1.3 μm.

[0053] Preferably, in the fiber bundle 1, the number of hollow fiber 101 is one, and the number of solid fiber 102 is six to twelve. Figure 1 As shown, a hollow fiber 101 is positioned at the center of the fiber bundle 1, and six solid fibers 102 are evenly spaced around the outside of the hollow fiber 101.

[0054] Furthermore, in a preferred embodiment of the present invention, the method for manufacturing the optical fiber bundle 1 specifically includes the following steps:

[0055] (1) Arrange the hollow fiber 101 and solid fiber 102 according to the designed number and position;

[0056] (2) The arranged optical fibers are pulled to the first mold. The hollow optical fiber 101 is coated with a layer of low modulus resin through the first mold and then UV cured to form the first layer of resin 103.

[0057] (3) The cured hollow fiber 101 with coating and other solid fiber 102 are pulled along a preset route to the second mold. High modulus resin is filled between the outer periphery of the coated hollow fiber 101 and the solid fiber 102, and UV curing is performed to form the second layer of resin 104, thus completing the preparation of the hollow and solid mixed fiber bundle 1.

[0058] Preferably, when coating with low-modulus resin and / or filling with high-modulus resin, the coating or filling can be continuous, such that the first layer of resin 103 and / or the second layer of resin 104 are continuously extended along the longitudinal direction of the optical fiber bundle 1 or are spaced out in multiple segments.

[0059] Furthermore, the present invention also relates to a hybrid optical cable of hollow and solid optical fibers, comprising the hybrid optical fiber bundle 1 in the above embodiments, and further comprising a water-blocking material 2, a reinforcing member 3, and an outer sheath 4.

[0060] Specifically, multiple fiber bundles 1 are twisted together at the center of the optical cable to form the cable core, with the twisting method being SZ twist or S twist. The water-blocking material 2 can be water-blocking yarn or water-blocking tape, which covers the outer periphery of the twisted hybrid fiber bundles 1, creating a gap between the outer sheath 4 and the hybrid fiber bundles 1. This ensures that the fiber bundles 1 have room to move and adjust their shape within the optical cable when it bends, achieving sliding buffering and maximizing their own bending radius. It can be understood that when the optical cable bends, the fiber bundles 1 can move to the periphery, forming a smooth arc, increasing the bending radius of the fiber bundles 1, thereby minimizing the bending strain and bending stress applied to the fiber bundles 1.

[0061] Preferably, the duty cycle of the multiple mixed optical fiber bundles 1 under the inner circle formed by the water-blocking material 2 is not greater than 50%, providing sufficient physical displacement space for the optical fiber bundles 1. Here, the duty cycle refers to the ratio of the total cross-sectional area of ​​the multiple optical fiber bundles 1 to the cross-sectional area of ​​the inner circle of the water-blocking material 2.

[0062] Preferably, the ratio of the diameter of the space formed by the water-blocking material 2 to the equivalent diameter of the cable core formed after the optical fiber bundle 1 is twisted is greater than 1.25, to ensure that the bending radius of the optical fiber bundle 1 is within an acceptable range when the optical cable is bent to the minimum achievable bending radius. Specifically, the diameter of the space formed by the water-blocking material 2 refers to the diameter d3 of the circumcircle of the inner surface of the water-blocking material 2 on its cross-section.

[0063] Furthermore, in a preferred embodiment of the present invention, the outer sheath 4 is disposed on the outer periphery of the water-blocking material 2, providing mechanical protection and isolation for the cable core. In actual installation, the material of the outer sheath 4 can be PE (polyethylene), LSZH (low halogen smokeless), etc.

[0064] Furthermore, in a preferred embodiment of the present invention, at least one reinforcing member 3 is embedded within the outer sheath 4, such as... Figure 2 As shown, two reinforcing members 3 are provided inside the outer sheath 4. The two reinforcing members 3 are symmetrically arranged inside the outer sheath 4 to improve the tensile and compressive mechanical strength of the optical cable. Preferably, the reinforcing members 3 can be made of FRP, steel wire, etc.

[0065] Preferably, the excess length of the fiber bundle 1 in the optical cable is 0.05%~0.05%, that is, after the 10m optical cable is cut, the difference between the length of the fiber bundle 1 and the length of the optical cable is 5~50mm. This is to resist the tensile strain of the optical cable and, in conjunction with the gap inside the cable, provide greater flexibility and freedom for the fiber bundle 1 to move outward and find a low-stress path when the optical cable bends, thereby more effectively reducing bending loss.

[0066] Furthermore, the manufacturing method of the hybrid optical cable containing hollow and solid optical fibers in the preferred embodiment of the present invention specifically includes the following steps:

[0067] (1) Twist multiple fiber bundles 1 together in an SZ twist or S twist manner to form a cable core;

[0068] (2) Wrap water-blocking yarn or water-blocking tape around the outer periphery of the cable core;

[0069] (3) At least one reinforcing member 3 is pulled to the outside of the cable core wrapped with water-blocking yarn or water-blocking tape, and together they are pulled to the extruder for extrusion to form the outer sheath 4.

[0070] The following are specific examples:

[0071] Examples 1-3 include the hybrid fiber bundles and hybrid optical cables of the present invention. In Comparative Example 1, hollow fiber and solid fiber 102 are distributed circumferentially in fiber bundle 1, and no first layer of resin 103 is provided. In Comparative Example 2, the fiber bundle does not have a first layer of resin 103. Other parameters are shown in the table below. Interchangeable fiber bundles are prepared according to each parameter, and multiple hybrid fiber bundles are prepared into optical cables. The bending loss of hollow fiber 101 in each optical cable is tested.

[0072]

[0073] As can be seen from the above embodiments and comparative examples, the hollow fiber 101 is placed in the center, the solid fiber 102 is wrapped around the outside of the hollow fiber 101, and a hybrid optical cable of hollow and solid fibers made of low modulus resin and high modulus resin is sequentially arranged on the outside of the hollow fiber 101, which effectively reduces the additional loss of the hollow fiber 101 after cabling.

[0074] Those skilled in the art will readily understand that the above description is merely 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 within the scope of protection of the present invention.

Claims

1. A hybrid fiber bundle containing hollow and solid optical fibers, characterized in that, It includes hollow optical fiber, solid optical fiber, first layer resin and second layer resin; The hollow optical fiber is configured as at least one and is positioned at the center of the optical fiber bundle; The solid optical fiber is configured as multiple fibers, and is distributed circumferentially at intervals on the outside of the hollow optical fiber. The first layer of resin is wrapped around the outer periphery of at least one of the hollow optical fibers, and the elastic modulus of the first layer of resin is 50~200 MPa; The second layer of resin is wrapped around the outer periphery of the first layer of resin, and the solid optical fiber is embedded in the second layer of resin. The elastic modulus of the second layer of resin is 500~1000Mpa; the distance between the outer wall of the solid optical fiber and the outer wall of the first layer of resin is 20~50um.

2. The hybrid fiber bundle of hollow and solid optical fibers according to claim 1, characterized in that, The thickness of the first resin layer is 20~40um; The cross-sectional area of ​​the second layer of resin accounts for 40% to 60% of the total cross-sectional area of ​​the optical fiber bundle.

3. The hybrid fiber bundle of hollow and solid optical fibers according to claim 1, characterized in that, The first layer of resin comprises: 20-50 parts of first prepolymer, 30-50 parts of first diluent, and 1-5 parts of first additive; the second layer of resin comprises: 50-85 parts of second prepolymer, 15-30 parts of second diluent, and 1-5 parts of second additive.

4. The hybrid fiber bundle of hollow and solid optical fibers according to claim 3, characterized in that, The first prepolymer is one or more of polyurethane acrylate and polyester acrylate; the first diluent is a monofunctional or difunctional acrylate. The second prepolymer is one or more of epoxy acrylate and polyester acrylate; the second diluent is a difunctional or multifunctional acrylate. The first additive and the second additive are one or more of the following: defoamer and leveling agent.

5. The hybrid fiber bundle of hollow and solid optical fibers according to claim 1, characterized in that, The distance between two adjacent solid optical fibers is 20~80um.

6. The hybrid fiber bundle of hollow and solid optical fibers according to claim 1, characterized in that, The hollow fiber has a diameter of 200~400um, the solid fiber has a diameter of 160~250um, and the fiber bundle has a diameter of 800~1300um.

7. The hybrid fiber bundle of hollow and solid optical fibers according to any one of claims 1 to 6, characterized in that, The first layer of resin extends continuously along the longitudinal direction of the optical fiber bundle or is spaced out in multiple segments; and / or, the second layer of resin extends continuously along the longitudinal direction of the optical fiber bundle or is spaced out in multiple segments.

8. A hybrid optical cable containing hollow and solid optical fibers, characterized in that, The fiber bundle includes a hybrid fiber bundle of hollow and solid fibers as described in any one of claims 1 to 7.

9. The hybrid optical cable of hollow and solid optical fibers according to claim 8, characterized in that, The hybrid optical cable also includes water-blocking materials, reinforcing components, and a sheath; The hybrid optical fiber bundle is configured as multiple strands, and the water-blocking material covers the outer periphery of the multiple hybrid optical fiber bundles; the sheath covers the outer periphery of the water-blocking material, and the reinforcing member is embedded in the outer sheath.

10. The hybrid optical cable of hollow and solid optical fibers according to claim 9, characterized in that, The duty cycle of the hybrid optical fiber bundle under the inner circumference of the water-blocking material is no greater than 50%. The ratio of the diameter of the space formed by the water-blocking material coating to the diameter of the cable core formed by the stranding of the optical fiber bundle is greater than 1.25; The excess length of the hybrid optical fiber bundle in the hybrid optical cable is 0.05% to 0.5%.

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