Deconcentrator with optical fiber crossing and loopback functions

Abstract

The invention provides a deconcentrator with optical fiber crossing and loopback functions, and relates to the technical field of optical cable joints, the deconcentrator comprises a fiber distribution box and a cover plate, the two ends and the top of the fiber distribution box are opened, the top of the fiber distribution box is provided with the detachable cover plate, a plurality of fiber winding columns are arranged in the fiber distribution box, and the fiber winding columns are arranged according to a set arc path. An optical fiber loopback channel is formed between the plurality of fiber winding columns and the box walls of the fiber distribution boxes on the two sides, an installation channel used for installing a strip-shaped crossed optical fiber is formed between the openings in the two ends of each fiber distribution box and the plurality of fiber winding columns, an insertion hole is formed in the cover plate, and when the cover plate covers the top of each fiber distribution box, the fiber winding columns penetrate into the insertion holes. The deconcentrator can realize the cross interconnection and loopback functions of the optical fibers, and solves the problems in the prior art that the bending radius of the optical fibers is too small and the optical fibers are pressed to cause breakage.

Description

Technical Field

[0001] This invention relates to the field of optical cable connector technology, specifically to a splitter with optical fiber crossing and loopback functions. Background Technology

[0002] With the rapid development of information technology, especially the advancement of technologies such as 5G, artificial intelligence (AI), and cloud computing, the data transmission capacity of optical fiber communication networks is constantly increasing, leading to a continuous increase in the demand for optical fiber resources. Optical devices such as WSS (wavelength selective switch) and OCS (optical channel selector) contain tens to hundreds of optical fibers, necessitating the interconnection of optical paths within a limited space.

[0003] As an important fiber optic connection device, fiber optic splitters are widely used in scenarios such as WSS and OCS multi-core fiber cross-connection. In some specific application scenarios, in addition to realizing the cross-connection of a large number of fibers, fiber optic splitters also need to realize the fiber loop function, that is, to allow the fiber to enter from one port and return from the same port, making an internal loop.

[0004] What are the drawbacks of existing technologies? 1. For example Figure 1 As shown, the glue-filled splitter: glues the optical fiber in place, and the optical fiber inside the splitter cannot be retracted or extended. Under high and low temperature environments, the stress on the optical fiber cannot be released, which can easily cause the optical fiber to break; it does not have an optical fiber loopback function.

[0005] 2. For example Figure 2 As shown, the loopback box splitter can only realize the loopback function of a small number of optical fibers and has no optical fiber cross-connection function.

[0006] 3. Fiber optic crossover and loopback distribution boxes: These have issues such as uncertain loopback fiber winding paths or fiber damage. For example... Figure 3 As shown, when no fiber-winding posts are installed in the fiber distribution box, the fiber loopback path cannot be determined, which can easily lead to an excessively small fiber bending radius, resulting in increased optical path loss and, in severe cases, even fiber breakage. Figure 4As shown, when a fiber-winding post is installed inside the fiber distribution box, but the post is flush with the bottom surface of the top cover, if the fiber is positioned above the post during assembly, it may be damaged or broken when the cover is closed, especially when there are many fibers and their arrangement is complex. Alternatively, the height of the post can be set lower than the bottom surface of the top cover, with the gap greater than 0.25mm. Since the outer diameter of the coated fiber is 0.25mm, the top cover can be assembled without pressing on the fiber. However, this can cause other problems. For example, when the fiber distribution box is subjected to high and low temperature changes, the fiber may retract into the box. This increases the fiber length, causing it to bend and potentially bypass the post. If the fiber bypasses the post, it may result in a small bending radius and increased loss. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a splitter with fiber optic crossover and loopback functions, which enables fiber optic crossover and loopback, solving the problems of excessively small fiber bending radius and fiber breakage caused by compression in the prior art.

[0008] To achieve the above technical objectives, the adopted technical solution is as follows: a splitter with fiber optic crossover and loopback functions, including a fiber splitter box and a cover plate. The fiber splitter box has openings at both ends and the top. A removable cover plate is provided on the top of the fiber splitter box. Several fiber-wound posts are provided inside the fiber splitter box. The fiber-wound posts are arranged in a predetermined arc path. The fiber-optic loopback channel is formed between the fiber-wound posts and the box walls on both sides of the fiber splitter box. The optical fiber is installed in the optical fiber loopback channel, with its two ends passing through the same opening at the same end of the fiber splitter box. The two openings at both ends of the fiber splitter box and the several fiber-wound posts form an installation channel for installing a ribbon crossover optical fiber. The ribbon crossover optical fiber passes through one end of the fiber splitter box, passes through the installation channel, and extends out from the other end opening. The cover plate has a socket. When the cover plate is placed on the top of the fiber splitter box, the fiber-wound posts are inserted into the sockets.

[0009] The number of fiber-wound columns is ≥2.

[0010] Set the radius of the circular arc path to be greater than or equal to the minimum bending radius of the optical fiber.

[0011] The two ends of the fiber distribution box are set diagonally.

[0012] The two ends of the fiber distribution box are set at different heights.

[0013] The top of the fiber-wound column has a first chamfer.

[0014] The bottom of the socket has a second chamfer.

[0015] The cover is installed on top of the fiber distribution box using fixing screws.

[0016] The beneficial effects of this invention are: 1. By arranging the fiber-wrapping pillars according to the set arc path to constrain the fiber-wrapping path, the fiber can be wrapped around according to the minimum bending radius of the fiber even in a small fiber distribution box.

[0017] 2. By lengthening the fiber winding post and designing an opening in the top cover plate, the cover plate is inserted through the fiber winding post during assembly. This avoids visually pressing on the optical fiber and also ensures that the loopback optical fiber will not cross the fiber winding post, resulting in an excessively small bending radius and excessive loss.

[0018] 3. The optical fiber does not need to be glued and fixed, and can move within the splitter. During assembly, a certain amount of slight bending is left in the fiber distribution box, allowing the optical fiber to freely enter and exit the distribution box, avoiding stress on the optical fiber under changes in high and low temperature environments.

[0019] 4. Chamfers are provided at the top of the fiber optic post and the bottom of the socket to facilitate the assembly of the fiber optic post and the socket.

[0020] 5. Setting the installation channel to an asymmetrical installation channel increases the fiber length margin, which can better cope with the tensile stress on the fiber caused by the change in the length of the bundle tube when the ambient temperature rises, thus improving environmental resistance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a glue-filled splitter; Figure 2 Schematic diagram of a loopback junction box; Figure 3 Schematic diagram of fiber optic crossover and loopback function distribution box (without fiber winding posts); Figure 4 Schematic diagram of fiber optic crossover and loopback function distribution box (with fiber winding posts); Figure 5 This is a schematic diagram of the structure of the present invention; Figure 6 This is an exploded view of the present invention; Figure 7 This is a cross-sectional view of the present invention; Figure 8 This is a diagram showing the defined arc path of the present invention; In the diagram: 1. Fiber distribution box, 11. Fiber winding post, 12. Fiber loop channel, 13. Installation channel, 111. First chamfer, 2. Cover plate, 21. Socket, 211. Second chamfer, 3. Fixing screw, 4. Loop fiber, 5. Ribbon cross fiber. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0025] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not 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 limiting the present invention. Furthermore, the terms "first" and "second" are only used to distinguish similar objects and should not be construed as a specific order or sequence. It should be understood that such use can be interchanged where appropriate.

[0026] like Figure 5 , Figure 6 As shown, a splitter with fiber optic crossing and loopback functions includes a fiber optic junction box 1 and a cover plate 2. The shape of the junction box 1 is not limited, but it contains a cavity for installing optical fibers. The junction box 1 has openings at both ends and at the top. The openings at both ends are used for inserting and exiting ribbon-crossed optical fibers, respectively. Ribbon-crossed optical fibers refer to multiple optical fibers with different arrangements at the entrance and exit. Non-crossed optical fibers with the same arrangement can also use this splitter, entering from one end and exiting from the other. A removable cover plate 2 is provided on the top of the junction box 1 for sealing the top. The junction box 1 contains several fiber-winding posts 11 arranged along a predetermined arc path. This predetermined arc path naturally guides the optical fibers to travel along a smooth, standard radius curve path, eliminating minor bending losses caused by improper placement or fixing in a confined space. Figure 8The dotted line shown represents the defined arc path. A fiber optic loop channel 12 is formed between several fiber-wound posts 11 and the walls of the fiber distribution boxes 1 on both sides. The optical fiber is installed within this loop channel, with both ends passing through the same opening of the fiber distribution box. The optical fiber installed in the loop channel 12 can be a non-crossed fiber or a crossed fiber. A mounting channel 13 for installing a ribbon-shaped cross-linked optical fiber is formed between the openings at both ends of the fiber distribution box 1 and the several fiber-wound posts 11. The ribbon-shaped cross-linked optical fiber enters from one end of the fiber distribution box 1, passes through the mounting channel 13, and exits from the other end. The cover plate 2 has insertion holes 21. When the cover plate 2 is placed on top of the fiber distribution box 1, the fiber-wound posts 11 are inserted into the insertion holes 21. The fiber-wound posts 11 and the insertion holes 21 have a clearance fit for easy insertion.

[0027] The number of several fiber-wound columns 11 is ≥2, such as Figure 4 As shown, there are two fiber optic posts 11, positioned on a predetermined arc path. The space between the two posts 11 is an installation channel 13, and the space between the posts 11 and the wall of the fiber distribution box 1 is a fiber optic loopback channel 12. Figure 6 As shown, there are three fiber posts 11. The optical fiber enters from one side of the three fiber posts 11, passes around all the fiber posts 11, and exits from the other side. The loop optical fiber enters and exits from the same end.

[0028] like Figure 6 As shown, the two ends of the fiber distribution box 1 are diagonally positioned, so that the ribbon cross-fiber is arranged in a top-in, bottom-out form, which meets the fiber bending radius requirements for fiber transmission, and at the same time can increase the fiber length margin.

[0029] The two ends of the fiber splitter box 1 are set at different heights. The height of the openings at the two ends of the fiber splitter box 1 is different. By changing the bending radius of the optical fiber in the height direction, it meets the bending radius requirements of optical fiber transmission and can also increase the length margin of the optical fiber.

[0030] like Figure 7 As shown, the top of the fiber post 11 is provided with a first chamfer 111 to facilitate the alignment of the fiber post 11 with the socket 21.

[0031] like Figure 7 As shown, a second chamfer 211 is provided at the bottom of the socket 21, which makes the assembly between the fiber winding post 11 and the socket 21 more convenient.

[0032] like Figure 6 As shown, the cover plate 2 is installed on the top of the fiber distribution box 1 by fixing screws 3.

[0033] 1. Fiber optic cross-connection function: This fiber optic splitter is designed to allow fiber optic cables to enter from one end and exit from the other, while also supporting changes in the cable sequence during this process. The splitter features an asymmetrical structure with the cable entering from the upper right and exiting from the lower left. This structure allows the ribbon-shaped cross-linked fiber 5 to enter the splitter via a curved path, increasing the fiber length margin and better handling the tensile stress caused by changes in the bundle tube length when ambient temperature rises, thus improving environmental resistance.

[0034] 2. Loopback fiber function: The fiber optic splitter incorporates a fiber optic loop structure to guide the loopback fiber's winding path. The fiber can enter from one end, wind through the loop post 11, and exit from the same end, ensuring a stable loopback fiber path and preventing losses and fiber breakage caused by excessively small fiber bending radii. The loopback fiber 5 is positioned outside the loop post 11, with a reserved space between it and the loop post 11, not directly adjacent to it, to withstand the tensile stress caused by changes in the bundle tube length when ambient temperature rises, thus improving environmental resistance. The number of loop posts 11 is ≥2, and their positions are arranged according to… Figure 8 The circular arc is arranged in a dotted pattern. The radius of the arc can be set according to the minimum bending radius of the optical fiber, that is, the radius of the arc is greater than or equal to the minimum bending radius of the optical fiber.

[0035] 3. Avoid fiber optic cable compression: This invention designs a structure in which the fiber-wrapped post 11 passes through the cover plate 2. Specifically, the fiber-wrapped post 11 is lengthened, and a corresponding insertion hole 21 is opened on the cover plate 2. The fiber-wrapped post 11 can pass through the cover plate 2, avoiding the risk of damage caused by the inability to observe whether there is an optical fiber above the fiber-wrapped post 11 during the assembly of the fiber distribution box 1, thus providing visualization assurance. At the same time, it can prevent the optical fiber from deviating from its original path when changing high and low temperature environments by bypassing the fiber-wrapped post. This design ensures that the optical fiber path will not be disturbed by environmental changes, thus ensuring the stability of the loopback optical fiber.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit or restrict the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection declared by the present invention.

Claims

1. A splitter with fiber optic crossover and loopback functions, comprising a fiber splitter box (1) and a cover plate (2), wherein the fiber splitter box (1) has openings at both ends and the top, and a removable cover plate (2) is provided on the top of the fiber splitter box (1), characterized in that: The fiber distribution box (1) is provided with several fiber winding posts (11). The fiber winding posts (11) are arranged in a set arc path. The fiber winding posts (11) and the box walls of the fiber distribution box (1) on both sides form a fiber loop channel (12). The fiber is installed in the fiber loop channel (12). Its two ends pass through the same end opening of the fiber distribution box (1). The two end openings of the fiber distribution box (1) and the several fiber winding posts (11) form an installation channel (13) for installing ribbon cross fiber. The ribbon cross fiber passes through one end of the fiber distribution box (1), passes through the installation channel (13), and extends out from the other end opening. The cover plate (2) is provided with a socket (21). When the cover plate (2) is placed on the top of the fiber distribution box (1), the fiber winding posts (11) are inserted into the socket (21).

2. The splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: The number of several fiber-wound columns (11) is ≥2.

3. A splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: Set the radius of the circular arc path to be greater than or equal to the minimum bending radius of the optical fiber.

4. A splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: The two ends of the fiber distribution box (1) are set diagonally.

5. A splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: The two ends of the fiber distribution box (1) are set at different heights.

6. A splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: The top of the fiber column (11) is provided with a first chamfer (111).

7. A splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: The bottom of the socket (21) is provided with a second chamfer (211).

8. A splitter with fiber optic crossover and loopback functions as described in claim 1, characterized in that: The cover plate (2) is installed on top of the fiber distribution box (1) by fixing screws (3).

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