A package for a dual-channel PLC optical splitter in a space station and its manufacturing method.

Abstract

This invention relates to a packaging box for a dual-channel PLC optical splitter for a space station and its manufacturing method. The packaging box for the dual-channel PLC optical splitter for a space station includes a box body, two input optical cable protective sleeves installed inside the box body, two sets of PLC cores that serve as backups for each other, a multi-output optical cable protective sleeve, and an array slot output positioning block. The two input optical cable protective sleeves and the multi-output optical cable protective sleeve are respectively installed at both ends of the box body. One axial end of each set of PLC cores has a single fiber of multi-output protection tube. An array slot output positioning block with an array of positioning slots is installed inside one end of the box body. One axial end of the multi-output optical cable protective sleeve passes through and is fixed in multiple positioning slots. The single fiber of the multi-output protection tube passes through the multi-output optical cable protective sleeve to form a multi-output optical cable. The other axial end of each set of PLC cores has a single fiber of two input protection tubes. The single fiber of the two input protection tubes passes through the two input optical cable protective sleeves to form two input optical cables.

Description

Technical Field

[0001] This invention relates to the technical fields of spacecraft manufacturing and communication system equipment manufacturing, specifically to a packaging box for a dual-channel PLC optical splitter for a space station. Background Technology

[0002] An optical splitter needs to be installed within a payload support platform in the space environment. This splitter comprises two sets of PLC cores that serve as backups for each other. Optical splitters used in space stations are characterized by long lifespan, non-replaceability in orbit, and the ability to withstand the harsh space environment. Currently, conventional optical splitters use cylindrical steel tubes or plastic boxes for encapsulation, which presents challenges such as difficulty in securing and fixing, and poor mechanical resistance. There are also no commercially available optical splitters suitable for the space environment that include two sets of 1-to-12 PLC cores. Furthermore, optical splitters manufactured using conventional processes do not adequately protect the optical fiber, leading to increased insertion loss and even fiber breakage after space environment testing. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides a packaging box for a dual-channel PLC optical splitter in a space station and its manufacturing method, which belongs to the field of optical passive device manufacturing in the field of optical communication.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: This invention provides a packaging box for a dual-channel PLC optical splitter for a space station, including a box body, two input optical cable protective sleeves, two sets of PLC cores that serve as backups for each other, a multi-channel output optical cable protective sleeve, and an output positioning component. The two sets of PLC cores that serve as backups for each other are installed side by side in the box body. The two input optical cable protective sleeves and the multi-channel output optical cable protective sleeves are respectively installed at both ends of the box body. One axial end of the multi-channel output optical cable protective sleeve extends into the inner side of one end of the box body and is arranged corresponding to one axial end of the two sets of PLC cores. One axial end of the two input optical cable protective sleeves extends into the inner side of the other end of the box body and is arranged corresponding to the other axial end of the two sets of PLC cores. Two sets of PLC cores have a multi-output protection tube single fiber at one end of their axial direction. An output positioning component is installed on the inner side of one end of the housing. The output positioning component includes multiple array slot output positioning blocks that are stacked and fixed on top of each other or one output positioning block. Each array slot output positioning block has a row of positioning slots that are open from front to back or multiple positioning channels with top openings that are open from front to back. The axial end of the multi-output optical cable protection sleeve is inserted and fixed in multiple positioning slots in a corresponding manner, or the axial end of the multi-output optical cable protection sleeve is divided into multiple groups that are inserted and fixed in multiple positioning channels in a corresponding manner. Multiple output protection tube single fibers are inserted in the multi-output optical cable protection sleeve in a corresponding manner to form a multi-output optical cable. The other end of the two PLC cores has two single-fiber input protection tubes, which are threaded one-to-one into the protective sleeves of the two input optical cables to form two input optical cables.

[0005] The beneficial effects of the present invention are as follows: The present invention provides a packaging box for a dual-channel PLC optical splitter for a space station. By setting two sets of PLC cores inside the box and cooperating with the array slot output positioning block, the two sets of PLC cores can be fixed with fiber optic cables in a narrow box space, achieving orderly wiring and adhesive fixing, so as to ensure reliable use in orbit and meet optical performance requirements.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the output optical cable protective sleeve includes, from the inside out, a metal armor tube, an aramid layer, and an outer sheath. One end of the output optical cable protective sleeve is a metal armor tube segment, which is inserted into and fixed in multiple positioning slots.

[0008] Furthermore, when the single fiber of the multi-channel output protection tube is threaded through the output optical cable protective sleeve, it has axial movement margin and does not cross each other.

[0009] Furthermore, the two sets of PLC cores are pressed and fixed to the bottom wall of the box by the first clamping strip; the protective sleeves of the two input optical cables are located in part inside the box and fixed to the bottom wall of the box by the second clamping strip.

[0010] The beneficial effects of adopting the above-mentioned further solution are: the first clamping bar can stably clamp and fix the two sets of PLC cores to the bottom wall of the box. The second clamping bar can stably clamp and fix the protective sleeves of the two input optical cables to the bottom wall of the box.

[0011] Furthermore, a protective throat tube is connected to a portion of the output optical cable located outside the housing.

[0012] Furthermore, one end of each of the two sets of PLC cores has a single fiber with 24 output protection tubes, and the output positioning component has 24 positioning slots, which are arranged in a 4×6 array.

[0013] Furthermore, the positioning groove has a V-shaped structure.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the positioning groove with a V-shaped structure can achieve stable and effective fixation of the protective sleeve of the multi-output optical cable.

[0015] The present invention also provides a method for manufacturing the above-mentioned package for a dual-channel PLC optical splitter in a space station, comprising the following steps: S1, two sets of PLC cores are installed side by side in the box, with the two sets of PLC cores located at the center of the box near the other end; multiple first single-mode optical fibers are thrown out from one end of the axial direction of the two sets of PLC cores, and a first protective tube is threaded through each first single-mode optical fiber, and the first protective tube extends into the axial end of the PLC core by 1~2mm to form a multi-output protective tube single fiber. S2, an array slot output positioning block is first installed on the inner side of one end of the box body, with the positioning slot of the array slot output positioning block facing upwards, and a multi-channel output optical cable protective sleeve is fixed in the multiple positioning slots of the array slot output positioning block, with one output optical cable protective sleeve fixed in each positioning slot. S3, the single fiber of the multiple output protection tube is divided into multiple rows from top to bottom. The single fiber of the output protection tube located at the bottom row is inserted into the multiple output optical cable protection sleeves of the array slot output positioning block to form the bottom row output optical cable. S4, then fix another array slot output positioning block on the array slot output positioning block, repeat S2 and S3, and then form multiple rows of output optical cables from top to bottom; S5, two second single-mode optical fibers are thrown out from the other end of the two sets of PLC cores along the axis. A second protective tube is threaded through each second single-mode optical fiber and the second protective tube is inserted into the other end of the PLC core along the axis by 1~2mm to form two input protective tube single fibers. Then, the two input protective tube single fibers are threaded one-to-one into the protective sleeve of the two input optical cables to form two input optical cables.

[0016] The beneficial effects of the present invention are: the method for manufacturing the packaging box of the dual-channel PLC optical splitter of the present invention can orderly lay out and fix the output fiber arrays (i.e., multiple first single-mode fibers) of the two PLC cores in a narrow space, which can ensure stable and reliable use in orbit and meet the optical performance requirements.

[0017] The present invention also provides a method for manufacturing the above-mentioned package for a dual-channel PLC optical splitter in a space station, comprising the following steps: S1, two sets of PLC cores are installed side by side in the box, with the two sets of PLC cores located at the center of the box near the other end; multiple first single-mode optical fibers are thrown out from one end of the axial direction of the two sets of PLC cores, and a first protective tube is threaded through each first single-mode optical fiber, and the first protective tube extends into the axial end of the PLC core by 1~2mm to form a multi-output protective tube single fiber. S2, an output positioning block is installed on the inner side of one end of the box body, with the positioning channel of the output positioning block facing upward. Multiple sets of output optical cable protective sleeves are fixed in the multiple positioning channels of the output positioning block. Each positioning channel has a set of output optical cable protective sleeves, and the multiple output optical cable protective sleeves of each set are fixed sequentially from bottom to top in the corresponding positioning channel; thus forming multiple rows of output optical cables from top to bottom. S3, two second single-mode optical fibers are thrown out from the other end of the two sets of PLC cores along the axis. A second protective tube is threaded through each second single-mode optical fiber and the second protective tube is inserted into the other end of the PLC core along the axis by 1~2mm to form two input protective tube single fibers. Then, the two input protective tube single fibers are threaded one-to-one into the protective sleeve of the two input optical cables to form two input optical cables.

[0018] The beneficial effects of the present invention are: the method for manufacturing the packaging box of the dual-channel PLC optical splitter of the present invention can orderly lay out and fix the output fiber arrays (i.e., multiple first single-mode fibers) of the two PLC cores in a narrow space, which can ensure stable and reliable use in orbit and meet the optical performance requirements.

[0019] Furthermore, in S2, before the first protective tube is inserted into each first single-mode fiber, silicone is evenly applied to a 5-10mm length region near the root of each first single-mode fiber. During the process of inserting the first protective tube into the first single-mode fiber, when the first protective tube is pushed along the first single-mode fiber toward one end of the PLC core axis, some silicone is squeezed into the opening of the first protective tube, and some silicone is filled between the first single-mode fiber and the first protective tube.

[0020] The beneficial effect of adopting the above-mentioned further solution is that it can ensure the relative fixation between the first protective tube and the first single-mode optical fiber. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of the packaging box for the dual-channel PLC optical splitter of the present invention used in the space station; Figure 2 This is a cross-sectional view of the output optical cable of the present invention. Figure 3 This is a schematic diagram of the structure in which the metal armored tube segment of the output optical cable of the present invention is arranged in the positioning slot of the array slot output positioning block; Figure 4 This is a schematic diagram of the structure in which the metal armored tube segment of the output optical cable of the present invention is arranged in the positioning channel of the output positioning block.

[0022] The attached diagram lists the components represented by each number as follows: 1. Box body; 2. PLC core; 21. Input protection tube single fiber; 22. First single-mode fiber; 23. First protection tube; 24. Output protection tube single fiber; 25. Metal armored tube section; 3. Input optical cable; 4. Output optical cable; 41. Metal armor tube; 42. Aramid layer; 43. Outer sheath; 5. Output positioning component; 51. Positioning slot; 52. Positioning channel; 6. First clamping strip; 61. Second clamping strip; 7. Protective tube. Detailed Implementation

[0023] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0024] Example 1 like Figures 1-3 As shown in the figure, a packaging box for a dual-channel PLC optical splitter for a space station in this embodiment includes a box body 1, two input optical cable protective sleeves, two sets of PLC cores 2 that serve as backups for each other, a multi-channel output optical cable protective sleeve, and an output positioning component 5. The two sets of PLC cores 2 that serve as backups for each other are installed side by side inside the box body 1. The two input optical cable protective sleeves and the multi-channel output optical cable protective sleeves are respectively installed at both ends of the box body 1. One axial end of the multi-channel output optical cable protective sleeve extends into the inner side of one end of the box body 1 and is arranged corresponding to one axial end of the two sets of PLC cores 2. One axial end of the two input optical cable protective sleeve extends into the inner side of the other end of the box body 1 and is arranged corresponding to the other axial end of the two sets of PLC cores 2. like Figure 3 As shown, one end of each of the two sets of PLC cores 2 has a multi-output protection tube single fiber 24. An output positioning component 5 is installed on the inner side of one end of the housing 1. The output positioning component 5 includes multiple array slot output positioning blocks that are stacked and fixed. Each array slot output positioning block has a row of positioning slots 51 that are open from front to back. One end of the multi-output optical cable protection sleeve is inserted and fixed in the multiple positioning slots 51. The multiple output protection tube single fibers 24 are inserted in the multi-output optical cable protection sleeve to form a multi-output optical cable 4. The other end of the two sets of PLC cores 2 has two input protection tubes 21, which are inserted one-to-one into the protective sleeves of the two input optical cables to form two input optical cables 3.

[0025] In a preferred embodiment, the multiple output protection tubes 24 have axial mobility and do not cross each other when passing through the output optical cable protective sleeve.

[0026] like Figure 1As shown, specifically, the two sets of PLC cores 2 are pressed and fixed to the bottom wall of the housing 1 by the first clamping strip 6. The first clamping strip can stably press and fix the two sets of PLC cores to the bottom wall of the housing.

[0027] like Figure 1 As shown, specifically, a portion of the two input optical cable protective sleeves located inside the housing 1 is fixed to the bottom wall of the housing 1 by a second clamping strip 61. The second clamping strip stably clamps and fixes the two input optical cable protective sleeves to the bottom wall of the housing.

[0028] like Figure 1 As shown, specifically, a portion of the output optical cable 4 located outside the housing 1 is connected to a protective throat tube 7.

[0029] The PLC core in this embodiment must meet the requirements of GJB1936A-2009.

[0030] This embodiment provides a packaging box for a dual-channel PLC optical splitter for a space station. By setting two sets of PLC cores 2 inside the box body 1 and cooperating with the array slot output positioning block 5, the two sets of PLC cores 2 can be fixed with fiber optic cables in a narrow box space, achieving orderly wiring and adhesive fixation, so as to ensure reliable use in orbit and meet optical performance requirements.

[0031] Example 2 Based on Example 1, in this example, one end of the two sets of PLC cores 2 has 24 output protection tubes 24, and the output positioning component 5 has 24 positioning slots 51, which are arranged in a 4×6 array.

[0032] Furthermore, the positioning groove 51 has a V-shaped structure. The V-shaped positioning groove can achieve stable and effective fixation of the multi-output optical cable protective sleeve.

[0033] Example 3 like Figure 4 As shown in the figure, a packaging box for a dual-channel PLC optical splitter for a space station in this embodiment includes a box body 1, two input optical cable protective sleeves, two sets of PLC cores 2 that serve as backups for each other, a multi-channel output optical cable protective sleeve, and an output positioning component 5. The two sets of PLC cores 2 that serve as backups for each other are installed side by side inside the box body 1. The two input optical cable protective sleeves and the multi-channel output optical cable protective sleeves are respectively installed at both ends of the box body 1. One axial end of the multi-channel output optical cable protective sleeve extends into the inner side of one end of the box body 1 and is arranged corresponding to one axial end of the two sets of PLC cores 2. One axial end of the two input optical cable protective sleeve extends into the inner side of the other end of the box body 1 and is arranged corresponding to the other axial end of the two sets of PLC cores 2. like Figure 4As shown, one end of each of the two sets of PLC cores 2 has a multi-output protection tube single fiber 24. An output positioning component 5 is installed inside one end of the housing 1. The output positioning component 5 includes an output positioning block. The output positioning block has multiple positioning channels 52 with top openings and through-holes. One end of the multi-output optical cable protection sleeve is divided into multiple groups that are correspondingly inserted and fixed in the multiple positioning channels 52. The multiple output protection tube single fibers 24 are correspondingly inserted in the multi-output optical cable protection sleeve to form a multi-output optical cable 4. The other end of each of the two sets of PLC cores 2 has a two-input protection tube single fiber 21. The two input protection tube single fibers 21 are correspondingly inserted in the two-input optical cable protection sleeve to form two-input optical cables 3.

[0034] Other structural features of this embodiment can be found in the description of Embodiment 1.

[0035] Example 4 Based on any one of Embodiments 1 to 3, this embodiment provides a specific structure for an output optical cable protective sleeve, such as... Figure 3 As shown, the output optical cable protective sleeve includes, from the inside out, a metal armor tube 41, an aramid layer 42, and an outer sheath 43. One end of the output optical cable protective sleeve is a metal armor tube section 25, which is inserted into and fixed within multiple positioning slots 51 or corresponding positioning channels 52.

[0036] Specifically, the structure of the input optical cable protective sleeve in this embodiment is the same as that of the output optical cable protective sleeve. The input optical cable protective sleeve also includes, from the inside out, a metal armor tube, an aramid layer, and an outer sheath. The single fiber of the input protective tube and the corresponding input optical cable protective sleeve have a loose fit, and the single fiber of the output protective tube and the corresponding output optical cable protective sleeve also have a loose fit. This can prevent the force from being transmitted to the bare optical fiber and causing damage when the optical cable is subjected to external tension or compression.

[0037] Example 5 This embodiment provides a method for manufacturing a package for a dual-channel PLC optical splitter in a space station, as described in Embodiment 1, 2, or 4 above, including the following steps: S1, two sets of PLC cores 2 are installed side by side in the housing 1, with the two sets of PLC cores 2 located at the center of the housing 1 near the other end; multiple first single-mode optical fibers 22 are thrown out from one axial end of the two sets of PLC cores 2, and a first protective tube 23 is threaded through each first single-mode optical fiber 22, and the first protective tube 23 extends into the axial end of the PLC core 2 by 1~2mm (i.e., into the plug at the axial end of the PLC core by 1~2mm), forming a multi-output protective tube single fiber 24; S2, an array slot output positioning block is first installed on the inner side of one end of the box 1, such as Figure 3As shown, the positioning slots 51 of the array slot output positioning block are arranged facing upwards. Multiple output optical cable protective sleeves are fixed in the multiple positioning slots 51 of the array slot output positioning block. Each positioning slot 51 is fixed with one output optical cable protective sleeve. The output optical cable protective sleeve can be fixed by applying glue in the positioning slot. S3, the single fiber of the multiple output protection tube is divided into multiple rows from top to bottom. The single fiber of the output protection tube located at the bottom row is inserted into the multiple output optical cable protection sleeves of the array slot output positioning block to form the bottom row output optical cable. S4, then fix another array slot output positioning block on the array slot output positioning block, repeat S2 and S3, and then form multiple rows of output optical cables from top to bottom; S5, two second single-mode optical fibers are ejected from the other end of the two sets of PLC cores 2 along the axis. A second protective tube is threaded through each second single-mode optical fiber, and the second protective tube extends 1~2mm into the other end of the PLC core 2 along the axis (i.e., into the plug at the other end of the PLC core along the axis by 1~2mm), forming two input protective tube single fibers 21. Then, the two input protective tube single fibers 21 are threaded one-to-one into the two input optical cable protective sleeves to form two input optical cables 3. After the input protective tube single fibers are threaded out of the corresponding input optical cable protective sleeves and the tension of the input protective tube single fibers is appropriate, glue is applied at the position where the input protective tube single fibers enter the input optical cable protective sleeves, that is, glue is applied to one end of the input optical cable protective sleeve inside the box, so as to fix the input protective tube single fibers to the input optical cable protective sleeves.

[0038] This embodiment describes a method for manufacturing a packaging box for a dual-channel PLC optical splitter in a space station, which can effectively prevent external forces on the optical cable from being transmitted to the bare optical fiber (single-mode optical fiber) and the PLC core.

[0039] This embodiment describes a method for manufacturing a dual-channel PLC optical splitter package for a space station. This method enables the orderly wiring and fiber optic cable fixing of the output fiber arrays (i.e., multiple first single-mode fibers) of two PLC cores within a confined space, ensuring stable and reliable operation in orbit and meeting optical performance requirements.

[0040] Example 6 This embodiment provides a method for manufacturing a package box for a dual-channel PLC optical splitter in a space station as described in Embodiment 3 above, including the following steps: S1, two sets of PLC cores 2 are installed side by side in the housing 1, with the two sets of PLC cores 2 located at the center of the housing 1 near the other end; multiple first single-mode optical fibers 22 are thrown out from one axial end of the two sets of PLC cores 2, and a first protective tube 23 is threaded through each first single-mode optical fiber 22, and the first protective tube 23 extends into the axial end of the PLC core 2 by 1~2mm (i.e., into the plug at the axial end of the PLC core by 1~2mm), forming a multi-output protective tube single fiber 24; S2, as Figure 4 As shown, an output positioning block is installed on the inner side of one end of the housing 1, with the positioning channel 52 of the output positioning block facing upward. Multiple sets of output optical cable protective sleeves are fixed in the multiple positioning channels 52 of the output positioning block. Each positioning channel 52 is fixed with one set of output optical cable protective sleeves. The multiple output optical cable protective sleeves in each set are fixed with glue from bottom to top in the corresponding positioning channel 52. In this way, multiple rows of output optical cables 4 are formed from top to bottom. S3, two second single-mode optical fibers are ejected from the other end of the two sets of PLC cores 2 along the axis. A second protective tube is threaded through each second single-mode optical fiber, and the second protective tube extends 1~2mm into the other end of the PLC core 2 along the axis (i.e., into the plug at the other end of the PLC core along the axis by 1~2mm), forming two input protective tube single fibers 21. Then, the two input protective tube single fibers 21 are threaded one-to-one into the two input optical cable protective sleeves to form two input optical cables 3. After the input protective tube single fibers are threaded out of the corresponding input optical cable protective sleeves and the tension of the input protective tube single fibers is appropriate, glue is applied at the position where the input protective tube single fibers enter the input optical cable protective sleeves, that is, glue is applied to one end of the input optical cable protective sleeve inside the box, so as to fix the input protective tube single fibers to the input optical cable protective sleeves.

[0041] This embodiment describes a method for manufacturing a packaging box for a dual-channel PLC optical splitter in a space station, which can effectively prevent external forces on the optical cable from being transmitted to the bare optical fiber (single-mode optical fiber) and the PLC core.

[0042] This embodiment describes a method for manufacturing a dual-channel PLC optical splitter package for a space station. This method enables the orderly wiring and fiber optic cable fixing of the output fiber arrays (i.e., multiple first single-mode fibers) of two PLC cores within a confined space, ensuring stable and reliable operation in orbit and meeting optical performance requirements.

[0043] Example 7 Based on Embodiment 5 or Embodiment 6, this embodiment provides a preferred method for inserting the protective tube and single-mode optical fiber. In S2, before inserting the first protective tube 23 onto each first single-mode optical fiber 22, silicone is evenly applied to a 5-10mm length region near the root of each first single-mode optical fiber 22. During the insertion of the first protective tube 23 onto the first single-mode optical fiber 22, as the first protective tube 23 is pushed along the first single-mode optical fiber 22 toward one end of the PLC core 2's axial direction, some silicone is squeezed to the opening of the first protective tube 23, and some silicone fills the space between the first single-mode optical fiber 22 and the first protective tube 23. This ensures the relative fixation between the first protective tube and the first single-mode optical fiber.

[0044] Furthermore, in S3, before inserting the second protective tube onto each second single-mode fiber, silicone is evenly applied to a 5-10mm length region near the root of each second single-mode fiber. During the insertion of the second protective tube, as the second protective tube is pushed along the second single-mode fiber towards one end of the PLC core axis, some silicone is squeezed to the opening of the second protective tube, and some silicone fills the space between the second single-mode fiber and the second protective tube. This ensures the relative fixation between the second protective tube and the second single-mode fiber.

[0045] The packaging box for the dual-channel PLC optical splitter prepared in this embodiment for the space station passed the qualification and inspection according to the "Detailed Specifications for Space PLC Splitters," and the product is functioning normally in orbit. After environmental testing, the PLC splitter core was opened for inspection. Microscopic inspection was conducted on the condition of the coupling adhesive between the two sets of PLC core output fiber arrays (FAs) and the chip, the condition of the fiber bonding adhesive, the PLC core, the FAs, and the protective tube. The results showed that the surface condition was consistent with that before the qualification test, indicating that the design and production of the PLC core packaging box meet the requirements for space-grade use and will not affect the optical link performance.

[0046] In the description of this invention, it should be understood that the terms "center", "length", "bottom", "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and 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 a limitation of this invention.

[0047] Furthermore, 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 technical features indicated. 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 explicitly specified.

[0048] 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.

[0049] 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.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A packaging box for a dual-channel PLC optical splitter in a space station, characterized in that, The device includes a housing, two input optical fiber cable protective sleeves, two sets of PLC cores that serve as backups for each other, a multi-output optical fiber cable protective sleeve, and an output positioning component. The two sets of PLC cores that serve as backups for each other are installed side by side inside the housing. The two input optical fiber cable protective sleeves and the multi-output optical fiber cable protective sleeves are respectively installed at both ends of the housing. One axial end of the multi-output optical fiber cable protective sleeve extends into the inner side of one end of the housing and is arranged corresponding to one axial end of the two sets of PLC cores. One axial end of the two input optical fiber cable protective sleeve extends into the inner side of the other end of the housing and is arranged corresponding to the other axial ends of the two sets of PLC cores. Two sets of PLC cores have a multi-output protection tube single fiber at one end of their axial direction. An output positioning component is installed on the inner side of one end of the housing. The output positioning component includes multiple array slot output positioning blocks that are stacked and fixed on top of each other or one output positioning block. Each array slot output positioning block has a row of positioning slots that are open from front to back or multiple positioning channels with top openings that are open from front to back. The axial end of the multi-output optical cable protection sleeve is inserted and fixed in multiple positioning slots in a corresponding manner, or the axial end of the multi-output optical cable protection sleeve is divided into multiple groups that are inserted and fixed in multiple positioning channels in a corresponding manner. Multiple output protection tube single fibers are inserted in the multi-output optical cable protection sleeve in a corresponding manner to form a multi-output optical cable. The other end of the two PLC cores has two single-fiber input protection tubes, which are threaded one-to-one into the protective sleeves of the two input optical cables to form two input optical cables.

2. The packaging box for a dual-channel PLC optical splitter in a space station according to claim 1, characterized in that, The output optical cable protective sleeve comprises, from the inside out, a metal armor tube, an aramid layer, and an outer sheath. The section of the output optical cable protective sleeve near one end is a metal armor tube section, which is inserted into and fixed in multiple positioning slots.

3. The packaging box for a dual-channel PLC optical splitter in a space station according to claim 1, characterized in that, When the single fiber of the multi-channel output protection tube is threaded through the output optical cable protection sleeve, it has axial movement margin and does not cross each other.

4. The packaging box for a dual-channel PLC optical splitter in a space station according to claim 1, characterized in that, The two sets of PLC cores are pressed and fixed to the bottom wall of the box by the first clamping strip; the protective sleeves of the two input optical cables are located in part inside the box and fixed to the bottom wall of the box by the second clamping strip.

5. The packaging box for a dual-channel PLC optical splitter in a space station according to claim 1, characterized in that, The output optical cable is located on a portion of the outside of the housing and is connected to a protective throat.

6. The packaging box for a dual-channel PLC optical splitter in a space station according to claim 1, characterized in that, The two sets of PLC cores have 24 output protection tubes at one end of their axial direction. The output positioning component has 24 positioning slots, which are arranged in a 4×6 array.

7. The packaging box for a dual-channel PLC optical splitter in a space station according to claim 6, characterized in that, The positioning groove has a V-shaped structure.

8. A method for manufacturing a package for a dual-channel PLC optical splitter in a space station as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1, two sets of PLC cores are installed side by side in the box, with the two sets of PLC cores located at the center of the box near the other end; multiple first single-mode optical fibers are thrown out from one end of the axial direction of the two sets of PLC cores, and a first protective tube is threaded through each first single-mode optical fiber, and the first protective tube extends into the axial end of the PLC core by 1~2mm to form a multi-output protective tube single fiber. S2, an array slot output positioning block is first installed on the inner side of one end of the box body, with the positioning slot of the array slot output positioning block facing upwards, and a multi-channel output optical cable protective sleeve is fixed in the multiple positioning slots of the array slot output positioning block, with one output optical cable protective sleeve fixed in each positioning slot. S3, the single fiber of the multiple output protection tube is divided into multiple rows from top to bottom. The single fiber of the output protection tube located at the bottom row is inserted into the multiple output optical cable protection sleeves of the array slot output positioning block to form the bottom row output optical cable. S4, then fix another array slot output positioning block on the array slot output positioning block, repeat S2 and S3, and then form multiple rows of output optical cables from top to bottom; S5, two second single-mode optical fibers are thrown out from the other end of the two sets of PLC cores along the axis. A second protective tube is threaded through each second single-mode optical fiber and the second protective tube is inserted into the other end of the PLC core along the axis by 1~2mm to form two input protective tube single fibers. Then, the two input protective tube single fibers are threaded one-to-one into the protective sleeve of the two input optical cables to form two input optical cables.

9. A method for manufacturing a package for a dual-channel PLC optical splitter in a space station as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1, two sets of PLC cores are installed side by side in the box, with the two sets of PLC cores located at the center of the box near the other end; multiple first single-mode optical fibers are thrown out from one end of the axial direction of the two sets of PLC cores, and a first protective tube is threaded through each first single-mode optical fiber, and the first protective tube extends into the axial end of the PLC core by 1~2mm to form a multi-output protective tube single fiber. S2, an output positioning block is installed on the inner side of one end of the box body, with the positioning channel of the output positioning block facing upward. Multiple sets of output optical cable protective sleeves are fixed in the multiple positioning channels of the output positioning block. Each positioning channel has a set of output optical cable protective sleeves, and the multiple output optical cable protective sleeves of each set are fixed sequentially from bottom to top in the corresponding positioning channel; thus forming multiple rows of output optical cables from top to bottom. S3, two second single-mode optical fibers are thrown out from the other end of the two sets of PLC cores along the axis. A second protective tube is threaded through each second single-mode optical fiber and the second protective tube is inserted into the other end of the PLC core along the axis by 1~2mm to form two input protective tube single fibers. Then, the two input protective tube single fibers are threaded one-to-one into the protective sleeve of the two input optical cables to form two input optical cables.

10. A method for manufacturing a package for a dual-channel PLC optical splitter in a space station according to claim 8 or 9, characterized in that, In S2, before the first protective tube is inserted into each first single-mode fiber, silicone is evenly applied to a 5-10mm long area near the root of each first single-mode fiber. During the process of inserting the first protective tube into the first single-mode fiber, when the first protective tube is pushed along the first single-mode fiber toward one end of the PLC core axis, some silicone is squeezed to the opening of the first protective tube, and some silicone is filled between the first single-mode fiber and the first protective tube.

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