Optical cable

Abstract

Transparent optical cable comprising an outer sheath, a main optical fiber and at least two reinforcing elements, wherein the main optical fiber and the at least two reinforcing elements are all arranged within the outer sheath, and the main optical fiber and the at least two reinforcing elements have the same direction of extension; and the at least two amplifying elements are spaced apart on an outer circumference of the main optical fiber and at least one amplifying element is an auxiliary optical fiber; the outer shell is made of transparent materials.

Description

[0001] This application claims priority over Chinese patent application No. 202110665310,5, filed with the China National Intellectual Property Administration on June 16, 2021, entitled “OPTICAL CABLE”, which is incorporated herein by reference in its entirety. TECHNICAL AREA

[0002] Embodiments of this application relate to the field of drop cable technologies and in particular to an optical cable. BACKGROUND

[0003] In recent years, some high-end users have placed higher demands on home networking, and the requirements for whole-optical home networks are becoming increasingly important. Fiber to the Room (FTTR) is emerging as a new market opportunity. In an FTTR solution, an Optical Network Unit (ONU) is connected to a home user's main optical network terminal (ONT) to implement Fiber to the Room. The main ONT is connected via an optical cable to an information box (which is a miniaturized optical line terminal, or OLT) in each room to ensure that every room has a stable network point, thus creating a complete whole-optical home networking scenario.

[0004] In conventional technology, an optical cable laid to each room comprises a central optical fiber, a reinforcement element, and a protective sheath. The central optical fiber and the reinforcement element are housed within the protective sheath, thus concealing and protecting them. This prevents the central optical fiber and the reinforcement element from being exposed to the external environment and extends their service life. The reinforcement element is configured to improve the tensile strength of the optical cable to prevent damage to the central optical fiber under external force.

[0005] However, if a central optical fiber in a conventional optical cable is damaged and fails, the entire optical cable must be replaced. This consumes time and labor and increases maintenance costs. SUMMARY

[0006] Embodiments of this application provide an optical cable to solve a problem where, after a single optical fiber in a conventional optical cable is damaged, the entire optical cable has to be replaced, resulting in time-consuming, labor-intensive and costly maintenance.

[0007] One embodiment of this application provides an optical cable comprising an outer sheath, a main optical fiber and at least two reinforcing elements.

[0008] The main optical fiber and the reinforcing elements are all arranged within the outer sheath, and the main optical fiber and the reinforcing elements have the same direction of extension.

[0009] At least two amplifying elements are spaced apart on an outer circumference of the main optical fiber, and at least one of the amplifying elements is an auxiliary optical fiber.

[0010] According to the optical cable provided in embodiments of this application, at least one reinforcing element is arranged on one side of the main optical fiber as an auxiliary optical fiber. In this way, the auxiliary optical fiber, which serves as the reinforcing element, can improve the tensile strength of the entire optical cable to protect the main optical fiber from damage under external force. Additionally, the auxiliary optical fiber can also be configured to transmit an optical signal. After the main optical fiber is damaged, without having to replace the entire optical cable, fusion splicing and similar processes can be performed directly on the auxiliary optical fiber. The auxiliary optical fiber is used for signal transmission. This not only ensures the normal use of the optical cable but also facilitates its maintenance and reduces maintenance costs.

[0011] In an optional implementation, at least two amplification elements are arranged on one of two sides of the main optical fiber along a first radial direction, and each amplification element is an auxiliary optical fiber.

[0012] According to one embodiment of this application, at least two reinforcing elements are arranged on each of two sides of the main optical fiber along the first radial direction to further improve the tensile strength of the optical cable. Additionally, each reinforcing element is arranged as an auxiliary optical fiber, so that after the main optical fiber is damaged, each auxiliary optical fiber can be used for optical signal transmission, thus simplifying maintenance of the optical cable. Furthermore, two auxiliary optical fibers located on the same side of the main optical fiber can together function as a dual-core optical fiber and are each configured to transmit and receive optical signals, respectively, to improve the reliability of the optical cable's signal transmission.

[0013] In an optional implementation, a plurality of amplification elements located on the same side of the main optical fiber are arranged along a first direction.

[0014] There is an angle between the first direction and the first radial direction.

[0015] Since the main optical fiber and the amplifier elements located on either side of the main optical fiber occupy specific space in the first radial direction, the majority of amplifier elements located on the same side of the main optical fiber are arranged along the first direction at a specific angle to the first radial direction in order to save space occupied by the majority of amplifier elements located on the same side of the main optical fiber in the first radial direction. In this way, the structure of the optical cable according to this embodiment of this application is more compact, and furthermore, space occupied by laying the optical cable is saved, so that the cable is better suited for use in an indoor communication scenario and is also more convenient to install.

[0016] In an optional implementation, the first direction and the first radial direction are perpendicular to each other, further saving the space occupied by the reinforcing elements in the optical cable along the first radial direction. This reduces the size of the optical cable in the first radial direction and also improves the structural compactness of the optical cable.

[0017] In an optional implementation, the optical cable further includes a tight sleeve, and the tight sleeve is pushed onto an outer surface of the main optical fiber.

[0018] The outer sheath and the tight sleeve are both formed from transparent materials, and the manufacturing materials of the outer sheath and the tight sleeve both include one or more of polyvinyl chloride, nylon, and thermoplastic polyurethane elastomer rubber.

[0019] According to one embodiment of this application, the tight sleeve is slipped onto the main optical fiber to improve its rigidity and ensure that it is not bent or damaged during transport and installation. Furthermore, both the outer sheath and the tight sleeve are made of transparent materials to enhance the transparency of the entire optical cable, allowing it to blend more seamlessly with various home decor styles. Additionally, both the outer sheath and the tight sleeve are made of the aforementioned fire-resistant materials to ensure the fire safety performance of the outer sheath while providing a transparent concealment effect.

[0020] In an optional implementation, the optical cable also includes an adhesive layer and an anti-adhesive layer.

[0021] The adhesive layer is arranged on at least part of a surface of the outer sheath, and the anti-adhesive layer is bonded to a surface of the adhesive layer.

[0022] According to one embodiment of this application, the adhesive layer is arranged on at least a portion of the surface of the outer sheath, and the anti-adhesive layer is arranged on the surface of the adhesive layer. In this way, when the optical cable is being laid, it can be quickly and securely adhered to a wall directly through the adhesive layer after the anti-adhesive layer has been removed, thereby improving the efficiency of laying the optical cable in this embodiment of this application.

[0023] In an optional implementation, at least part of an outer surface of the outer shell is configured as a plane, and the adhesive layer is arranged on the plane.

[0024] According to one embodiment of this application, at least a part of the outer surface of the outer sheath is arranged as a plane to help to stably attach the adhesive layer to the surface of the outer sheath and also to enable the outer sheath to be stably attached to a wall by means of the horizontal adhesive layer.

[0025] In an optional implementation, the adhesive layer is a transparent double-sided adhesive tape, and the transparent double-sided tape and the outer sheath are integrally formed as a single part. This improves the manufacturing efficiency of the optical cable and makes it easier to attach and adhere, thus improving the efficiency of the optical cable installation. Furthermore, the transparent double-sided tape enhances the transparency of the optical cable, allowing it to blend more seamlessly with various home decor styles.

[0026] In an optional implementation, a first groove and a second groove are formed on the outer shell. The first groove and the second groove extend from one end of the outer shell to the other end along the direction of extension.

[0027] The first groove is arranged in a second radial direction of the main optical fiber and the second groove is arranged in the first radial direction of the main optical fiber.

[0028] The first radial direction and the second radial direction are perpendicular to each other.

[0029] According to one embodiment of this application, the first groove is arranged on the outer jacket and is located in the second radial direction of the main optical fiber. This allows the outer jacket to be torn at the groove on the outer jacket when the main optical fiber needs to be connected, thus quickly exposing the fiber and connecting it to an information box or similar device. Additionally, the optical cable can be quickly split into a left and right section. This exposes the end section of any auxiliary optical fiber on either side of the main optical fiber, allowing it to be fusion-spliced ​​or connected with an FMC connector. This further improves the maintenance efficiency of the optical cable. The second groove is also located on the outer jacket along the first radial direction of the main optical fiber.In this way, if the main optical fiber within the outer sheath is damaged, the outer sheath can be quickly torn off from the second groove to rapidly expose the auxiliary optical fiber and perform fusion splicing and similar repairs on it. This further improves the maintenance efficiency of the optical cable.

[0030] In an optional implementation, the width of the outer cladding in the first radial direction of the main optical fiber ranges from 1.5 mm to 2.0 mm. The height of the outer cladding in the second radial direction of the main optical fiber ranges from 1.2 mm to 1.9 mm. The first and second radial directions are perpendicular to each other.

[0031] By adjusting the width of the outer sheath in the first radial direction and the width of the outer sheath in the second radial direction within the protruding areas, the space occupied by the optical cable is reduced, making the optical cable more suitable for use in indoor communication scenarios. For example, the optical cable can enter any room through a door gap, simplifying cross-room installation, thereby reducing the installation time and cost of the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a schematic representation of the structure of an optical cable according to an embodiment of this application; Fig. Figure 2 is a radial cross-sectional view of Fig. 1; Fig. Figure 3 is a schematic representation of another structure of an optical cable according to an embodiment of this application; Fig. Figure 4 is a radial cross-sectional view of Fig. 3; Fig. Figure 5 is a schematic representation of yet another structure of an optical cable according to an embodiment of this application; Fig. Figure 6 is a schematic representation of yet another structure of an optical cable according to an embodiment of this application; and Fig. Figure 7 is a radial cross-sectional view of Fig. 6. Reference symbol: 100 outer mantle; 110 first groove; 120 second groove; 200 main optical fibers; 300 reinforcement elements; 400 narrow sleeve; 500 adhesive layer; and 600 anti-stick coating. DESCRIPTION OF THE EXECUTION FORMS

[0032] The terms used in embodiments of this application are used only to explain specific embodiments of this application, but are not intended to limit this application.

[0033] Currently, an optical cable, running between a main optical modem (ONT) in a home and an information terminal (OLT) in each room, is configured to transmit an optical signal between the main modem and the information terminal. This allows an optical network unit located upstream of the main modem to extend deep into the home. This ensures that each room has a stable network point for implementing a Fiber to the Room (FTTR) solution.

[0034] Generally, a central optical fiber and a gain element are arranged within an optical cable that connects a main optical modem to an information box in each room. The gain element is located on the outer circumference of the central optical fiber. Additionally, the optical cable includes an outer jacket that encloses the central optical fiber and gain element to insulate them from the external environment. The central optical fiber is configured to transmit an optical signal, and the gain element is configured to improve the tensile strength of the entire optical cable, protecting the central optical fiber from damage under external force.

[0035] In a conventional technology, the reinforcing element is mainly formed from one or more copper-plated steel wire, phosphated steel wire, galvanized steel wire, Kevlar fiber reinforced plastic (KFRP), and fiber reinforced polymer (FRP) to ensure that the shielding tension of the reinforcing element is at least 150 kpsi, thereby improving the tensile strength of the optical cable.

[0036] In actual use, the central optical fiber is inevitably damaged due to external forces or similar factors, and thus no longer transmits an optical signal. To ensure the normal operation of the entire network, a damaged optical cable between the main optical modem and the information cabinet in the room must be completely replaced. This not only consumes time and labor but also increases the maintenance costs of the optical cable.

[0037] In particular, the cost of an entire optical cable is high. Additionally, a new optical cable must be installed on the wall, and both ends of the new optical cable's central optical fiber must be reconnected to the information box and the main optical modem. This entire process consumes time and labor, significantly reducing the maintenance efficiency of the optical cable.

[0038] Based on this, one embodiment of this application provides an optical cable. Some or all of the reinforcing elements are arranged as optical fibers. In this way, an optical fiber acting as a reinforcing element can improve the tensile strength of the entire optical cable to protect the central optical fiber, i.e., a primary optical fiber, from damage under an external force. Additionally, the optical fiber acting as the reinforcing element can be used as an auxiliary optical fiber and configured to transmit an optical signal. After the primary optical fiber is damaged, without replacing the entire optical cable, fusion splicing and the like are performed directly on the auxiliary optical fiber. In other words, the auxiliary optical fiber is used for signal transmission.This ensures the normal use of the optical cable, facilitates the maintenance of the optical cable, and reduces maintenance costs.

[0039] A specific structure of the optical cable according to an embodiment of this application is described in detail below.

[0040] Fig. Figure 1 is a schematic representation of the structure of an optical cable according to an embodiment of this application. Fig. Figure 2 is a radial cross-sectional view of Fig. 1. With reference to Fig. 1 and Fig. 2 An embodiment of this application provides an optical cable comprising an outer sheath 100, a main optical fiber 200, and at least two reinforcing elements 300. The main optical fiber 200 and the reinforcing elements 300 are all arranged within the outer sheath 100, and the main optical fiber 200 and the reinforcing elements 300 have the same direction of extension.

[0041] In this embodiment of this application, the main optical fiber 200 serves as a key element of the optical cable and is configured to transmit an optical signal. For example, after the optical cable is connected to an optical main modem in a home and an information box in each room, the main optical fiber 200 in the optical cable implements the signal transmission between the optical main modem and the information box. The shield voltage of the main optical fiber 200 can be 100 kpsi or even less than 100 kpsi. The shield voltage of the main optical fiber 200 is not specifically limited in this embodiment of this application.

[0042] During the specific configuration, the main optical fiber 200 can be a single-core optical fiber or a multi-core optical fiber. The structure of the optical cable using a single-core optical fiber as an example is described in detail below. Additionally, the main optical fiber 200 can be a single-mode optical fiber. For example, the main optical fiber 200 can be a single-mode optical fiber of one of the models G.652D, G.657A2, and B3. Alternatively, the main optical fiber 200 can be a multi-mode optical fiber. For example, the main optical fiber 200 can be a multi-mode optical fiber of one of the models OM2, OM3, and OM4.

[0043] In actual application, the optical fiber 200 and the reinforcing elements 300 are enclosed within the outer sheath 100 to insulate the main components of the optical cable—the optical fiber 200 and the reinforcing element 300—from the external environment. This protects the optical fiber 200 and prevents damage caused by collisions between the optical fiber 200 and the external environment during transport or installation.

[0044] Generally, the outer jacket 100 completely encases the main optical fiber 200 and the reinforcing elements 300 along their entire length before the optical cable is used. In other words, the outer jacket 100 completely encases the main optical fiber 200 and the reinforcing elements 300. Once the optical cable is installed, a portion of the outer jacket 100 is stripped from the outer circumference of one end segment of the main optical fiber 200 to expose the end segment. The main optical fiber 200 is then fusion-spliced ​​or connected using an FMC connector and subsequently connected to the information box, the main optical modem, and the like.

[0045] In an actual manufacturing process, connectors can be prefabricated directly at both ends of the optical fiber 200 within the optical cable. In this way, once the optical cable is installed, portions of the outer jacket 100 are removed from the outer circumferences of the end sections of the optical fiber 200 to expose the prefabricated connectors at the end sections of the optical fiber 200, and finally, the prefabricated connectors are connected to the information box and the like.

[0046] With reference to Fig. 2 In this embodiment of this application, at least two reinforcing elements 300 are spaced apart on an outer circumference of the main optical fiber 200. The reinforcing elements 300 are arranged on the outer circumference of the main optical fiber 200 to improve the tensile strength of the entire optical cable and to prevent the main optical fiber 200 from being damaged under an external force.

[0047] For example, as in Fig. As shown in Figure 2, two reinforcing elements 300 are spaced apart on the outer circumference of the main optical fiber 200, and the two reinforcing elements 300 can each be arranged on two sides of the main optical fiber 200 along a first radial direction (referring to a Fig. 2 shown direction x), to ensure that the two reinforcing elements 300 both protect a structure of the main optical fiber 200.

[0048] It should be noted that the first radial direction, i.e., direction x, is a direction of extension of a first diameter of the optical main fiber 200. The first diameter can be a diameter in any direction of the optical main fiber 200. This embodiment of this application is described in detail using an example in which a horizontal direction is used as the first radial direction, i.e., direction x. It should be emphasized here that in this embodiment of this application, an example in which the optical main fiber 200 is a monocore optical fiber is used for structural description, and the radial direction of the optical main fiber 200 refers to a radial direction of the monocore optical fiber.If the optical main fiber 200 is an optical multicore fiber, the radial direction of the optical main fiber 200 refers to a radial direction of a cylindrical structure formed jointly by the optical multicore fiber.

[0049] In this case, it is understood that a connecting line between the two amplifying elements 300, each arranged on one side of the optical main fiber 200 along the first radial direction, i.e., direction x, passes through a central axis of the optical main fiber 200. In other words, the two amplifying elements 300 are centrosymmetric with respect to the optical main fiber 200.

[0050] Certainly, in another example, the two amplifying elements 300 could also be arranged on opposite sides of the optical main fiber 200 along a different direction parallel to the first radial direction, i.e., direction x. That is, the connecting line between the two amplifying elements 300 does not pass through the central axis of the optical main fiber 200. In other words, the two amplifying elements 300 are only axially symmetric with respect to the central axis of the optical main fiber 200, but not centrosymmetric with respect to the optical main fiber 200. The arrangement of the amplifying elements 300 is not restricted in this embodiment of this application.

[0051] In the preceding example, the main optical fiber 200 can be arranged at a central position of the outer sheath 100. The two reinforcing elements 300 are each arranged on the outer circumference of the main optical fiber 200, and the distances between the reinforcing elements 300 and the central axis of the main optical fiber 200 can all be the same.

[0052] Fig. Figure 3 is a schematic representation of the structure of an optical cable according to an embodiment of this application. Fig. Figure 4 is a radial cross-sectional view of Fig. 3. With reference to Fig. 3 and Fig. 4. Two or more reinforcing elements 300 can be present during the specific configuration. For example, the main optical fiber 200 is arranged at a central position of the outer sheath 100. Three reinforcing elements 300 are evenly distributed around a central axis of the main optical fiber 200 and around an outer circumference of the main optical fiber 200.

[0053] In another example, at least four reinforcing elements 300 can be arranged around the outer circumference of the main optical fiber 200. The four reinforcing elements 300 can be evenly distributed around the outer circumference of the main optical fiber 200. Certainly, in some examples, at least two reinforcing elements 300 can be arranged on each of two sides of the main optical fiber 200 along a first radial direction, that is, a direction x. In other words, at least two reinforcing elements 300 are arranged on each side of the main optical fiber 200 along the first radial direction, that is, direction x, to further improve the tensile strength of the optical cable in this embodiment of this application. For example, two or more reinforcing elements 300 are arranged on each of two sides of the main optical fiber 200 along the first radial direction.

[0054] With reference to Fig. 4 is a plurality of amplifying elements 300 located on the same side of the main optical fiber 200, arranged along a first direction (referring to a direction in Fig. 4. Direction a) shown. The first direction can be any direction at a specific angle to the first radial direction, that is, direction x. For example, two amplifying elements 300 are arranged on each of two sides of the main optical fiber 200 along the first radial direction, that is, direction x. Two amplifying elements 300 on the same side are arranged along the first direction, that is, direction a. There is a specific angle between the first direction a and the first radial direction, that is, direction x. For example, the angle between the first direction, that is, direction a, and the first radial direction, that is, direction x, can have a suitable value such as 30°, 45°, or 60°.

[0055] Furthermore, with reference to Fig. 4. Since the optical main fiber 200 and the amplifying elements 300, located on both sides of the optical main fiber 200, occupy specific space in the first radial direction, i.e., direction x, the majority of amplifying elements 300, located on the same side of the optical main fiber 200, are arranged along the first direction, i.e., direction a, at a specific angle to the first radial direction, i.e., direction x, in order to save space occupied by the majority of amplifying elements 300 located on the same side of the optical main fiber 200 in the first radial direction, i.e., direction x. In this way, the structure of the optical cable in this embodiment of this application is more compact, and space is saved that would otherwise be required for laying the optical cable.The optical cable is better suited for use in an indoor communication scenario and is more convenient to install.

[0056] During the specific configuration, the two amplifying elements 300 can be arranged on the same side of the main optical fiber 200 perpendicular to the first radial direction, i.e., direction x. In other words, the two amplifying elements 300 can be arranged on the same side of the main optical fiber 200 along the first direction, i.e., direction a, which is perpendicular to the first radial direction, i.e., direction x. This further saves space occupied by the amplifying elements 300 in the optical cable along the first radial direction, i.e., direction x, reduces the size of the optical cable in the first radial direction, i.e., direction x, and further improves the structural compactness of the optical cable.

[0057] For example, as in Fig. Figure 4 shows the two reinforcing elements 300 on the same side of the main optical fiber 200 along a direction parallel to a second radial direction (one in Fig. 4 shown direction y) of the main optical fiber 200. For example, the two reinforcing elements 300 are arranged on the same side, one on a top side and one on a bottom side of an axial cross-section of the main optical fiber 200 along the first radial direction.

[0058] It should be noted that the second radial direction, i.e., direction y, is a direction of extension of a second diameter of the optical main fiber 200, and the second diameter can be a diameter of the optical main fiber 200 in a direction perpendicular to the first radial direction. This embodiment of this application is described in detail using an example in which a vertical direction is used as the second radial direction, i.e., direction y.

[0059] It should be noted that, in order to reduce the size of the optical cable in the first direction, i.e., direction a, the majority of the reinforcing elements 300 on the same side of the main optical fiber 200 can be arranged in contact with each other. In other words, the majority of the reinforcing elements 300 arranged along the first direction, i.e., direction a, are arranged in contact with each other. By such an arrangement, the size of the reinforcing elements 300 in the first direction of the optical fiber, i.e., direction a, is reduced to further reduce the specified size of the optical cable in the first direction, i.e., direction a. Additionally, the reinforcing elements 300 that are in contact with each other can also support each other to improve the structural strength of each reinforcing element 300. With reference to Fig. For example, in Figure 4, the plurality of reinforcement elements 300 are sequentially stacked on the same side of the main optical fiber 200 along a direction parallel to the y direction. This effectively reduces the required size of the plurality of reinforcement elements 300 that are arranged on the same side in the direction perpendicular to the first radial direction, i.e., the x direction.

[0060] With reference to Fig. 4. During the specific configuration in this embodiment of this application, the width of the outer sheath 100 in the first radial direction of the main optical fiber 200, i.e., direction x, can be set to a range of 1.5 mm to 2.0 mm. For example, the width of the outer sheath 100 in the first radial direction of the main optical fiber 200, i.e., direction x, can have a suitable value such as 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm. In this embodiment of this application, the width of the outer sheath 100 in the first radial direction of the main optical fiber 200, i.e., direction x, is not restricted and can be specifically adjusted based on an actual requirement.

[0061] Additionally, the height of the outer sheath 100 in the second radial direction of the optical main fiber 200, i.e., direction y, ranges from 1.2 mm to 1.9 mm. For example, the height of the outer sheath 100 in the second radial direction of the optical main fiber 200, i.e., direction y, can have a suitable value such as 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, or 1.9 mm. In this embodiment of this application, the height of the outer sheath 100 in the second radial direction of the optical main fiber 200, i.e., direction y, is not limited and can be specifically adapted based on an actual requirement.

[0062] The second radial direction, that is, direction y, is perpendicular to the first radial direction, that is, direction x. For example, if the shape of a radial cross-section of the outer shell 100 is a square or rectangular structure, the first radial direction, that is, direction x, can be the width direction of the radial cross-section of the outer shell 100, and the second radial direction, that is, direction y, can be the height direction of the radial cross-section of the outer shell 100. In this way, the width of the outer shell 100 can be set within a range of 1.5 mm to 2.0 mm, and the height of the outer shell 100 can be set within a range of 1.2 mm to 1.9 mm, which can be specifically adjusted based on actual requirements.

[0063] It should be noted here that the values ​​and value ranges contained in embodiments of this application are approximate values, and there may be an error within a specific range due to the effects of the manufacturing process. This error may be considered negligible by a person skilled in the art.

[0064] By adjusting the width of the outer sheath to 100 in the first radial direction (i.e., direction x) and the width of the outer sheath in the second radial direction (i.e., direction y) within the specified areas, the space required for routing the optical cable is reduced, making it more suitable for indoor communication applications. For example, the optical cable can enter any room through a door gap, simplifying cross-room installation and thus reducing the installation time and cost of the optical cable.

[0065] At least one amplifying element 300 in this embodiment of this application is an optical auxiliary fiber. For example, with reference to Fig. 2. If a reinforcing element 300 is arranged on one of the two sides of the main optical fiber 200 along the first radial direction, that is, direction x, then one of the two reinforcing elements 300 located on the two sides of the main optical fiber 200 is an auxiliary optical fiber. For example, one reinforcing element 300 is arranged on the left side of the main optical fiber 200 as an auxiliary optical fiber. Certainly, both of the two reinforcing elements 300, each located on one side of the main optical fiber 200 along the first radial direction, that is, direction x, can be auxiliary optical fibers.

[0066] It should be noted that in this embodiment of this application, the primary optical fiber 200 signifies an optical fiber that plays a primary role. In other words, the optical cable generally transmits an optical signal through the primary optical fiber 200. The auxiliary optical fiber is a distinct term from the primary optical fiber 200, and the auxiliary optical fiber specifically signifies an optical fiber that plays a supporting role for the primary optical fiber 200. In other words, at least one amplifying element 300 is an optical fiber, and the optical fiber is used as an auxiliary optical fiber for the primary optical fiber 200 and may also be configured to transmit an optical signal.For example, if the main optical fiber 200 is damaged due to an external force or the like, the auxiliary optical fiber can be used for signal transmission between the main optical modem and the information box.

[0067] The optical auxiliary fiber can be a single-core optical fiber or a multi-core optical fiber. Additionally, the optical auxiliary fiber can be a single-mode optical fiber. For example, the optical auxiliary fiber can be a single-mode optical fiber of one of the models G.652D, G.657A2, and B3. Alternatively, the optical auxiliary fiber can be a multi-mode optical fiber. For example, the optical auxiliary fiber can be a multi-mode optical fiber of one of the models OM2, OM3, and OM4.

[0068] If some of the reinforcing elements 300 are arranged as optical auxiliary fibers, the remaining non-optical auxiliary fiber reinforcing element 300 may be formed from one or more copper-plated steel wire, phosphated steel wire, galvanized steel wire, Kevlar fiber reinforced plastic (KFRP), and fiber reinforced polymer (FRP) to ensure that the shielding tension of the reinforcing element 300 is at least 150 kpsi, thereby improving the tensile strength of the optical cable.

[0069] In an optional implementation, the remaining non-optical auxiliary fiber reinforcement elements 300 can be made of an FRP material. In this way, the non-optical auxiliary fiber reinforcement elements 300 are made of a transparent material. Since the optical fiber is also made of a transparent material, the materials of the main optical fiber 200, the auxiliary optical fiber, and the non-optical auxiliary fiber reinforcement elements 300 are all transparent. This enhances the invisible effect of the optical cable according to this embodiment of this application, allowing the optical cable to be adapted to various color schemes in home decor.

[0070] Additionally, for the optical auxiliary fiber, which serves as the reinforcing element 300, an optical fiber with a shield voltage of more than 150 kpsi can be used as the optical auxiliary fiber to further improve the tensile strength of the optical cable.

[0071] It is understood that if some of the reinforcing elements 300 are arranged as optical auxiliary fibers, the remaining, non-optical auxiliary fiber reinforcing elements 300 also improve the tensile strength of the optical cable. In this way, the main optical fiber 200 and the optical auxiliary fibers can all be protected to ensure that they are not damaged and extend the service life of the optical cable.

[0072] One of the installation processes of the optical cable according to this embodiment of this application is provided as follows.

[0073] First, a section of the optical cable is prepared according to this embodiment of the application. Then, the optical cable is laid on a wall between an optical main modem and an information box in a room. The outer sheath 100 at two ends of the optical cable is stripped, exposing the two ends of the optical main fiber 200. Then, end sections of the optical main fiber 200 are fusion-spliced ​​to an optical fiber on the optical main modem and an optical fiber on the information box, respectively. In this way, the optical main fiber 200 between the optical main modem and the information box is connected as the primary transmission medium for optical signals to transmit a signal between the optical main modem and the information box.

[0074] After the main optical fiber 200 is damaged, two ends of an arbitrary auxiliary optical fiber are exposed by tearing off the outer sheath 100, and then end segments of the auxiliary optical fiber are fusion-spliced ​​to the optical fiber on the main optical modem and the optical fiber on the information box, respectively. In this way, the auxiliary optical fiber between the main optical modem and the information box is connected as a transmission medium for optical signals to transmit a signal between the main optical modem and the information box.

[0075] According to the optical cable provided in this embodiment of this application, at least one reinforcing element 300 is arranged on one side of the main optical fiber 200 as an auxiliary optical fiber. In this way, the auxiliary optical fiber, which serves as the reinforcing element 300, can improve the tensile strength of the entire optical cable to protect the main optical fiber 200 from damage under external force. Additionally, the auxiliary optical fiber can also be configured to transmit an optical signal. After the main optical fiber 200 has been damaged, without replacing the entire optical cable, fusion splicing and the like are performed directly on the auxiliary optical fiber. The auxiliary optical fiber is used for signal transmission. This not only ensures the normal use of the optical cable but also facilitates maintenance of the optical cable and reduces maintenance costs.

[0076] During the specific configuration, each 300 amplifying element can be an auxiliary optical fiber. For example, with reference to Fig. 4. Two amplifying elements 300 are arranged on each of two sides of the main optical fiber 200 along the first radial direction, i.e., direction x, and the four amplifying elements 300 can all be auxiliary optical fibers. In this way, after the main optical fiber 200 is damaged, any of the auxiliary optical fibers can be used to transmit an optical signal, thus facilitating maintenance of the optical cable. Additionally, the two auxiliary optical fibers located on the same side of the main optical fiber 200 can together function as a dual-core optical fiber and are each configured to transmit and receive optical signals, respectively, to improve the reliability of signal transmission in the optical cable.

[0077] In the optical cable according to this embodiment of this application, the main optical fiber 200 can be a bare optical fiber to simplify the structure of the optical cable and improve its manufacturing efficiency. Furthermore, the optical fiber is a transparent structure, which can further enhance the transparency of the optical cable, thus improving its aesthetic appeal during installation.

[0078] Fig. Figure 5 is a schematic representation of yet another structure of an optical cable according to an embodiment of this application. With reference to Fig. 5. In some examples, the optical cable may further comprise a tight sleeve 400, and the tight sleeve 400 is pushed onto an outer surface of the main optical fiber 200. For example, if the main optical fiber 200 is a single-core optical fiber, the tight sleeve 400 is pushed onto an outer surface of the single-core optical fiber to protect the single-core optical fiber.

[0079] It is understood that the tight sleeve 400 is pushed onto the entire outer surface of the optical main fiber 200 along one direction of extension in order to completely encase the optical main fiber 200 in order to improve the stiffness of the optical main fiber 200 and thereby ensure that the optical main fiber 200 is not bent or damaged during transport and installation.

[0080] During specific configuration, the materials of the outer sheath 100 and the tight sleeve 400 can both be configured as transparent materials to improve the transparency of the entire optical cable, thus allowing the optical cable according to this embodiment of this application to be better adapted to various home decor styles. Furthermore, with reference to the reinforcing element 300, which is formed from an FRP material or optical fiber, the transparency and invisibility effect of the entire optical cable are maximized. This further improves the broad adaptability of the optical cable according to this embodiment of this application.

[0081] A manufacturing material of at least one of the outer sheath 100 and the tight sleeve 400 may comprise, but is not limited to, one or more of polyvinyl chloride (polyvinyl chloride, abbreviated PVC), nylon, and thermoplastic polyurethanes (thermoplastic polyurethanes, abbreviated TPU). For example, the manufacturing materials of the outer sheath 100 and the tight sleeve 400 may both comprise polyvinyl chloride (polyvinyl chloride, abbreviated PVC), nylon, or thermoplastic polyurethanes (thermoplastic polyurethanes, abbreviated TPU).

[0082] It should be noted that the aforementioned manufacturing materials of the outer sheath 100 and the tight sleeve 400 are all fire-retardant materials. The outer sheath 100 and the tight sleeve 400 are formed from these fire-retardant materials to ensure the fire safety performance of the outer sheath 100 inside, while implementing a transparent concealment effect.

[0083] If the optical cable is laid according to this embodiment of this application, the optical cable can be glued directly to a wall between the main optical modem and the information box using adhesive tape, or it can be clamped to the wall using a cable clamp.

[0084] With reference to Fig. 4. According to this embodiment of the application, the optical cable further comprises an adhesive layer 500 and an anti-adhesive layer 600 to further improve the efficiency of laying the optical cable. The adhesive layer 500 is arranged on at least a portion of a surface of the outer sheath 100, and the anti-adhesive layer 600 is bonded to a surface of the adhesive layer 500.

[0085] It is understood that the adhesive layer 500 is arranged on a surface of the outer sheath 100 that faces the wall, so that the outer sheath 100 is stably attached to the wall by the adhesive layer 500.

[0086] During the specific configuration, the adhesive layer 500 can extend from one end of the outer sheath 100 to the other end along its direction of extension. In other words, the length of the adhesive layer 500 corresponds to the length of the outer sheath 100. This ensures that any point on the outer sheath 100 is adhered to the wall along its direction of extension, thus improving the stability of the optical cable.

[0087] Certainly, in another example, the extension length of the adhesive layer 500 can be shorter than the extension length of the outer sheath 100. In other words, the adhesive layer 500 is arranged on a portion of the surface of the outer sheath 100 along the direction of extension. For example, a plurality of adhesive layers 500 can be spaced apart on the outer sheath 100 along the direction of extension. In this way, the outer sheath 100 is adhered to a wall at intervals along the direction of extension, not only to ensure that the outer sheath 100 is stably attached to the wall, but also to save on manufacturing materials for the optical cable according to this embodiment of this application, thereby reducing the manufacturing costs of the optical cable.

[0088] Additionally, the anti-adhesive layer 600 is glued to a surface of the adhesive layer 500 before the optical cable is installed to prevent the adhesive surface of the adhesive layer 500 from being contaminated by the external environment and becoming less adhesive.

[0089] During the specific installation of the optical cable according to this embodiment of this application, the anti-adhesive layer 600 on the surface of the adhesive layer 500 is first torn off and then the outer sheath 100 of the optical cable is stably glued to a planned wall through the adhesive layer 500.

[0090] In this embodiment of this application, the adhesive layer 500 is arranged on at least part of the surface of the outer sheath 100, and the anti-adhesive layer 600 is arranged on a surface of the adhesive layer 500. In this way, when the optical cable is laid, it can be quickly and securely adhered to a wall directly through the adhesive layer 500 after the anti-adhesive layer 600 has been removed, thereby improving the efficiency and reliability of laying the optical cable according to this embodiment of this application.

[0091] During the specific configuration, the adhesive layer 500 and the outer sheath 100 can be integrally formed as a single, integral part according to this embodiment of the application. For example, the outer sheath 100 and the adhesive layer 500 can be integrally formed by two-color injection molding, thus enabling more convenient and faster production of the optical cable.

[0092] Furthermore, with reference to Fig. 4. At least one part of an outer surface of the outer sheath 100 can be configured as a plane to improve the adhesive reliability of the optical cable. The adhesive layer 500 is arranged on this plane. For example, one of the surfaces of the outer sheath 100 can be arranged as a planar structure, and the adhesive layer 500 is arranged on this plane, so that the adhesive layer 500 is stably attached to the surface of the outer sheath 100, and the outer sheath 100 can be stably attached to the wall by the horizontal adhesive layer 500.

[0093] For example, one of two opposing surfaces, such as a lower surface, of the outer sheath 100 is arranged as a planar structure along the second radial direction of the main optical fiber 200, i.e., direction y. The adhesive layer 500 is located on the lower surface of the outer sheath 100, and the anti-adhesive layer 600 is bonded to an adhesive surface of the adhesive layer 500. When the optical cable is installed, the anti-adhesive layer 600 can be removed directly, and then the lower surface of the outer sheath 100 is bonded to the wall, allowing the optical cable to be installed efficiently and stably.

[0094] During a specific implementation, the adhesive layer 500 can be an adhesive applied to the surface of the outer sheath 100. The adhesive material can include, but is not limited to, one or more thermosetting resins such as epoxy resin, phenolic resin, urea-formaldehyde resin, and polyurethane; thermoplastic resins such as polyvinyl acetal and perchloroethylene resin; and synthetic rubber such as neoprene and nitrile rubber. For example, the adhesive used as the adhesive layer 500 can be formed from materials such as epoxy resin, polyvinyl acetal, and neoprene.

[0095] In some examples, the adhesive layer 500 can further be arranged as a transparent double-sided adhesive tape. The transparent double-sided adhesive tape and the outer sheath 100 are integrally formed as a single, integral part. For example, the outer sheath 100 and the transparent double-sided adhesive tape are integrally formed by two-color injection molding to improve the manufacturing efficiency of the optical cable.

[0096] Furthermore, the adhesive layer 500 is designed as a double-sided adhesive tape to facilitate application to the outer sheath 100 and to simplify the attachment and bonding of the optical cable. For example, the integrated optical cable can be directly bonded to a wall during installation. There is no need to first apply the double-sided adhesive tape to the outer sheath 100 before attaching the optical cable to the wall, and then bond the outer sheath 100 to the wall using the double-sided tape. Therefore, the efficiency of optical cable installation is improved.

[0097] In addition, the adhesive layer 500 is arranged as a transparent double-sided adhesive tape to further improve the transparency of the optical cable, so that the optical cable can be better adapted to different home decoration styles.

[0098] It should be noted that the anti-stick layer 600 on the outer surface of the adhesive layer 500 may be formed from a non-transparent material.

[0099] Based on the preceding information, it can be learned that, once the optical cable is installed, a portion of the outer jacket 100 must be removed from the outer circumference of an end section of the main optical fiber 200 to expose the end section. The main optical fiber 200 is then fusion-spliced ​​or connected using an FMC connector and subsequently connected to an information box, an optical modem, and the like. In this way, the main optical fiber 200 can implement optical signal transmission between the information box and the optical modem.

[0100] Fig. Figure 6 is a schematic representation of another structure of an optical cable according to an embodiment of this application. Fig. Figure 7 is a radial cross-sectional view of Fig. 6. With reference to Fig. 6 and Fig. 7 In this embodiment of this application, a first groove 110 can be formed on the outer sheath 100 to facilitate the tearing off of the outer sheath 100. The first groove 110 is arranged in a second radial direction of the main optical fiber 200, i.e., direction y, and the first groove 110 extends from one end of the outer sheath 100 to the other end of the outer sheath 100 along a direction of extension. In other words, the first groove 110 is arranged along the entire direction of extension of the outer sheath 100.

[0101] It is understood that, since the first groove 110 has a specific width, a portion of the first groove 110 is usually arranged in the second radial direction of the optical main fiber 200, i.e., the y-direction. In other words, the portion of the first groove 110 is arranged in a plane on which an axial cross-section of the optical main fiber 200 is arranged along the second radial direction, i.e., the y-direction.

[0102] With reference to Fig. Figure 7 shows that the first slot 110 is located in the second radial direction of the main optical fiber 200, i.e., direction y. When the optical cable is installed, the outer jacket 100 can be torn off at the first slot 110 to quickly expose an end section of the main optical fiber 200, and the main optical fiber 200 is then fusion-spliced ​​to the information box and the like. However, the extension length of the first slot 110 is designed to coincide with the extension length of the outer jacket 100, making it easier to quickly tear off the outer jacket 100 from the first slot 110 and thus further improving the installation efficiency of the optical cable.

[0103] Additionally, the first groove 110 is located on the outer sheath 100 and is oriented in the second radial direction of the main optical fiber 200, i.e., direction y. This allows the outer sheath to be torn off at the groove on the outer sheath 100 if the main optical fiber 200 is damaged, thus quickly separating the optical cable into a left and right section. This allows the end section of any auxiliary optical fiber on either side of the main optical fiber 200 to be conveniently and quickly exposed, and the auxiliary optical fiber end section can be fusion-spliced ​​or connected with an FMC connector to further improve the maintenance efficiency of the optical cable.

[0104] The cross-sectional shape of the first groove 110 along a radial direction of the main optical fiber 200 can be any shape, such as an inverted trapezoid, a rectangle, a square, or a triangle. For example, with reference to Fig. 7 The cross-sectional shape of the first groove 110 in the radial direction of the main optical fiber 200 is a triangle, and one apex of the triangle is located at the bottom of the first groove 110. In this way, it is easier to tear off the outer sheath 100 from the bottom of the first groove 110.

[0105] In the preceding example, the bottom of the first groove 110, with a triangular cross-section, can be positioned precisely in the second radial direction of the optical main fiber 200, i.e., direction y. In this way, the outer sheath 100 can be quickly stripped from the bottom of the first groove 110 to the surface of the optical main fiber 200.

[0106] It should be noted that the bottom of the first groove 110 specifically refers to a groove wall opposite an opening of the first groove 110.

[0107] During the specific configuration, two first slots 110 can be present, and the two first slots 110 are each arranged on opposite sides of the main optical fiber 200 along the second radial direction, i.e., the y direction. For example, as in Fig. As shown in Figure 6, a first groove 110 is arranged on both the upper and lower sides of the main optical fiber 200 along the second radial direction, i.e., the y-direction. In this way, the structural strength of a connection between the two first grooves 110 can be reduced, making it easier to tear the outer sheath 100 away from the first groove 110.

[0108] With reference to Fig. 6 and Fig. 7 In this embodiment of this application, a second groove 120 can be arranged on the outer sheath 100, and the second groove 120 is arranged in the first radial direction of the main optical fiber 200, i.e., direction x, to further improve the installation efficiency of the auxiliary optical fiber. Additionally, the second groove 120 extends from one end of the outer sheath 100 to the other end along the direction of extension. In other words, the second groove 120 is arranged along the entire length of the outer sheath 100.

[0109] Similar to the first groove 110, since the second groove 120 has a specific width, a portion of the second groove 120 is usually arranged in the first radial direction of the optical main fiber 200, i.e., the x-direction. In other words, the portion of the second groove 120 is arranged in a plane on which an axial cross-section of the optical main fiber 200 is arranged along the first radial direction, i.e., the x-direction.

[0110] The first radial direction, that is, the x-direction, and the second radial direction, that is, the y-direction, are perpendicular to each other. For example, with reference to Fig. 7 the first groove 110 is arranged on an upper surface or a lower surface of the outer shell 100 and the second groove 120 is arranged on a left surface or a right surface of the outer shell 100.

[0111] For example, the second groove 120 is located on the left surface of the outer sheath 100. Specifically, the second groove 120 is located on the left side of the main optical fiber 200 along the first radial direction, i.e., direction x. In this way, one of the reinforcing elements 300 is located on the left side of the main optical fiber 200 as an auxiliary optical fiber. If the main optical fiber 200 is damaged, the left surface of the outer sheath 100 can be quickly torn away from the second groove 120 to quickly expose an end section of the auxiliary optical fiber and perform subsequent fusion splicing and the like.

[0112] In another example, two second grooves 120 can also be arranged on the outer sheath 100, each located on opposite sides of the main optical fiber 200 along the first radial direction, i.e., direction x. For example, one second groove 120 is located on each of the left and right surfaces of the outer sheath 100. In this way, if a reinforcing element 300 on each of the left and right sides of the main optical fiber 200 includes an auxiliary optical fiber, and if the main optical fiber 200 is damaged, the outer sheath 100 can be quickly torn away from one of the second grooves 120 to quickly expose an end section of the corresponding auxiliary optical fiber and perform subsequent fusion splicing, etc.

[0113] With reference to Fig. 7 are optional when two reinforcing elements 300, which are in contact with each other, are arranged on one side and the other on the right side of the main optical fiber 200 along the first radial direction, i.e., direction x. Alternatively, the two reinforcing elements 300 can be arranged on both sides, one on the upper side and one on the lower side of the axial cross-section of the main optical fiber 200 along the first radial direction, i.e., direction x. Additionally, each reinforcing element 300 is arranged as an auxiliary optical fiber, with its outer sheath 100 being stripped from the second groove 120, which is located in the first radial direction of the main optical fiber 200, i.e., direction x. In this way, one of the two auxiliary optical fibers on the same side can be quickly exposed and fusion-spliced, thus improving the flexibility in selecting an auxiliary optical fiber.

[0114] From the preceding description, it can be seen that the second groove 120 on the outer sheath 100 is arranged along the first radial direction of the main optical fiber 200, i.e., direction x. In this way, if the main optical fiber 200 within the outer sheath 100 is damaged, the outer sheath 100 can be quickly torn away from the second groove 120 to rapidly expose the auxiliary optical fiber and perform fusion splicing and similar repairs on the auxiliary optical fiber. This further improves the maintenance efficiency of the optical cable.

[0115] Just like the first groove 110, the cross-sectional shape of the second groove 120 in the first radial direction of the main optical fiber 200, i.e., direction x, can be any shape, such as an inverted trapezoid, a rectangle, a square, or a triangle. For example, with reference to Fig. 7. The cross-sectional shape of the second groove 120 in the first radial direction of the main optical fiber 200, i.e., direction x, is a triangle, and one apex of the triangle is located at the bottom of the second groove 120. In this way, it is easier to tear off the outer sheath 100 from the bottom of the second groove 120.

[0116] It should be noted that the bottom of the second groove 120 specifically refers to a groove wall opposite an opening of the second groove 120.

[0117] With reference to Fig.7 In the preceding example, the bottom of the second groove 120, with a triangular cross-section, can be positioned precisely in the first radial direction of the main optical fiber 200, i.e., direction x. In this way, the outer sheath 100 is quickly torn away from the bottom of the second groove 120 to a position between the upper and lower reinforcing elements 300, so that one of the two reinforcing elements 300, located on the same side of the main optical fiber 200, can be quickly exposed.

[0118] In the description of embodiments of this application, it should be noted that, unless expressly stated and defined otherwise, the terms "install," "connect," and "link" are to be understood in the broadest sense, for example, a permanent connection, an indirect connection through a medium, internal communication between two elements, or an interaction relationship between the two elements. A person skilled in the art may understand specific meanings of the foregoing terms in embodiments of this application based on a specific situation.

[0119] In the description, claims and accompanying drawings of embodiments of this application, the terms “first”, “second”, “third”, “fourth” and so forth (if any) are intended to distinguish between similar objects, but do not necessarily indicate a specific order or sequence.

Claims

[1] Transparent optical cable comprising an outer sheath, a main optical fiber and at least two reinforcing elements, wherein the main optical fiber and the at least two reinforcing elements are all arranged within the outer sheath, and the main optical fiber and the at least two reinforcing elements have the same direction of extension; and the at least two amplifying elements are spaced apart on an outer circumference of the main optical fiber and at least one amplifying element is an auxiliary optical fiber; the outer shell is made of transparent materials. [2] Transparent optical cable according to claim 1, wherein the at least two reinforcing elements are arranged on two sides of the main optical fiber along a first radial direction. [3] Transparent optical cable according to claim 1 or 2, wherein the at least two reinforcing elements are transparent materials. [4] Transparent optical cable according to any one of claims 1-3, wherein each amplifying element is an optical auxiliary fiber. [5] Transparent optical cable according to one of claims 1-4, wherein the two reinforcing elements are centrosymmetric with respect to the main optical fiber. [6] Transparent optical cable according to one of claims 2-4, wherein the two reinforcing elements are arranged on two sides of the main optical fiber along a different direction parallel to the first radial direction. [7] Transparent optical cable according to any one of claims 1-6, wherein the transparent optical cable further comprises an adhesive layer and an anti-adhesive layer; and the adhesive layer is arranged on at least a part of a surface of the outer sheath and the anti-adhesive layer is bonded to a surface of the adhesive layer. [8] Transparent optical cable according to claim 7, wherein at least a part of an outer surface of the outer sheath is configured as a plane and the adhesive layer is arranged on the plane. [9] Transparent optical cable according to one of claims 2-4, wherein a plurality of reinforcing elements located on the same side of the main optical fiber are arranged along a first direction, wherein there is an angle between the first direction and the first radial direction. [10] Transparent optical cable according to claim 9, wherein the first direction and the first radial direction are perpendicular to each other. [11] Transparent optical cable according to any one of claims 1 to 10, wherein the optical cable further comprises a narrow sleeve and the narrow sleeve is pushed onto an outer surface of the main optical fiber. [12] Transparent optical cable according to claim 11, wherein the narrow sleeve is formed from transparent materials. [13] Transparent optical cable according to claim 12, wherein the manufacturing materials of the tight sleeve comprise one or more of polyvinyl chloride (PVC), nylon and thermoplastic polyurethane elastomer rubber (TPU). [14] Transparent optical cable according to any one of claims 1 to 13, wherein the manufacturing materials of the outer sheath comprise polyvinyl chloride (PVC). [15] Transparent optical cable according to any one of claims 1 to 14, wherein the manufacturing materials of the outer sheath comprise one or more of nylon and thermoplastic polyurethane elastomer rubber (TPU). [16] Transparent optical cable according to claim 7 or 8, wherein the adhesive layer is a double-sided adhesive tape. [17] Transparent optical cable according to claim 16, wherein the double-sided adhesive tape is a transparent double-sided adhesive tape. [18] Transparent optical cable according to one of claims 7-8 and 16-17, wherein the adhesive layer and the outer sheath are integrally formed as one integral part. [19] Transparent optical cable according to any one of claims 1 to 18, wherein a first groove is formed on the outer sheath and the first groove extends from one end of the outer sheath to the other end of the outer sheath along the direction of extension. [20] Transparent optical cable according to claim 19, wherein two first grooves are arranged on two sides of the main optical fiber along a second radial direction. [21] Transparent optical cable according to claim 20, wherein the second radial direction is perpendicular to the first radial direction. [22] Transparent optical cable according to claim 19, wherein a second groove is formed on the outer sheath and the second groove extends from one end of the outer sheath to the other end of the outer sheath along the direction of extension, wherein the first groove is arranged in a second radial direction of the main optical fiber and the second groove is arranged in the first radial direction of the main optical fiber; and the first radial direction and the second radial direction are perpendicular to each other. [23] Optical cable according to any one of claims 1 to 22, wherein the width of the outer sheath in the first radial direction of the main optical fiber ranges from 1.5 mm to 2.0 mm and the height of the outer sheath in a second radial direction of the main optical fiber ranges from 1.2 mm to 1.9 mm, wherein the first radial direction and the second radial direction are perpendicular to each other. [24] Transparent optical cable according to any one of claims 1 to 23, wherein the optical auxiliary fiber comprises a single-core optical fiber, a multi-core optical fiber, a single-mode optical fiber or a multi-mode optical fiber. [25] Transparent optical cable according to claim 24, wherein the optical auxiliary fiber is the single-mode optical fiber of one of the models G.652D, G.657A2 and B3. [26] Transparent optical cable according to claim 24, wherein the optical auxiliary fiber is the multimode optical fiber of one of the models OM2, OM3 and OM4. [27] Transparent optical cable according to any one of claims 1 to 26, wherein an FMC connector is connected to the main optical fiber. [28] Transparent optical cable according to any one of claims 1 to 26, wherein connectors are prefabricated at two ends of the main optical fiber. [29] Transparent optical cable according to any one of claims 1 to 28, wherein one form of a radial cross-section of the outer sheath is a square or rectangular structure. [30] Transparent optical cable according to claim 19 or 20, wherein one shape of a cross-section of the first groove along a radial direction of the main optical fiber is an inverted trapezoid, a rectangle, a square or a triangle. [31] Transparent optical cable according to claim 30, wherein a point of the triangle is located at a bottom of the first groove, the bottom of the first groove referring to a groove wall opposite an opening of the first groove. [32] Transparent optical cable according to any one of claims 1 to 31, wherein the main optical fiber is a single-core optical fiber or a multi-core optical fiber. [33] Transparent optical cable according to one of claims 7-8 and 16-17, wherein the adhesive layer is an adhesive applied to the surface of the outer sheath. [34] Transparent optical cable according to claim 33, wherein a manufacturing material of the adhesive comprises one or more of thermosetting resin, thermoplastic resin and synthetic rubber. [35] Transparent optical cable according to claim 34, wherein the thermosetting resin comprises epoxy resin, phenolic resin, urea-formaldehyde resin or polyurethane. [36] Transparent optical cable according to claim 34 or 35, wherein the thermoplastic resin comprises polyvinyl acetal or perchloroethylene resin. [37] Transparent optical cable according to claim 34 or 35 or 36, wherein the synthetic rubber comprises neoprene or nitrile rubber. [38] Transparent optical cable according to claim 33 or 34, wherein the adhesive layer is formed from epoxy resin, polyvinyl acetal and neoprene. [39] Transparent optical cable according to one of claims 11-13, wherein the narrow sleeve is formed from fire-retardant materials. [40] Transparent optical cable according to one of claims 1-39, wherein the outer sheath is made of fire-retardant materials. [41] Transparent optical cable according to one of claims 1-40, wherein the two reinforcing elements are embedded in the outer sheath and are in contact with the outer sheath.

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