Light emitting optical fiber and method of making same

Abstract

The application provides a light-emitting optical fiber and a preparation method thereof, and belongs to the technical field of light-emitting products. The light-emitting optical fiber comprises a plurality of cores and a light-transmitting layer covering the cores. Each core is provided with a scattering unit. Light propagating in the core is scattered by the scattering unit and then emitted by the light-transmitting layer. The core in the optical fiber can transmit light from the incident end to the emitting end of the optical fiber. The presence of the scattering unit allows a part of the transmitted light to leak out of the light-transmitting layer on the optical fiber, thereby forming side light emission to replace the existing LED products. The optical fiber has good ductility, so that the optical fiber can be arranged in various complex scenes. The arrangement of the core allows the light-emitting optical fiber in the application to be applicable in harsh environments with high temperature and heavy humidity.

Description

Technical Field

[0001] This invention belongs to the field of light-emitting product technology, and relates to a light-emitting optical fiber and its preparation method. Background Technology

[0002] Optical fiber, utilizing the principle of total internal reflection, can transmit optical signals to another end with low loss, making it widely used in optical communication. In this type of communication fiber, the cladding layer exhibits virtually no light leakage during transmission. Currently, most automotive interior and exterior lighting products use bulbs or LEDs for illumination. For products with complex shapes, the arrangement and installation of light sources are difficult and costly to manufacture. If optical fiber were redesigned to emit light from the side, it could replace LEDs in automotive lighting products, allowing for placement on complex shapes at a lower cost. Therefore, how to design optical fiber to emit light from the side and replace LEDs in automotive lighting products has become a major challenge for the industry. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a light-emitting optical fiber capable of emitting light from the side.

[0004] The objective of this invention can be achieved through the following technical solution: a light-emitting optical fiber, comprising multiple fiber cores and a light-transmitting layer covering the fiber cores, wherein each fiber core is provided with a scattering unit, and the light propagating inside the fiber core is scattered by the scattering unit and then emitted from the light-transmitting layer.

[0005] In the aforementioned light-emitting optical fiber, the scattering unit includes a coating layer composed of scattering particles. The coating layer covers the outer surface of the fiber core, and the light propagating inside the fiber core is scattered by the coating layer and then emitted through the light-transmitting layer.

[0006] In one of the aforementioned light-emitting optical fibers, the scattering unit includes a scattering hole formed within the fiber core.

[0007] A method for fabricating a light-emitting optical fiber, the method comprising the following steps:

[0008] S1. Preparation of fiber core glass block: Mix the raw materials evenly, melt them under inert gas protection, and obtain the fiber core glass block after rapid cooling;

[0009] S2. Preform processing: The fiber core glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0010] S3. Glass fiber preparation: The preformed rod is placed in the drawing tower and drawn to obtain glass fiber;

[0011] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer and then subjected to ultraviolet baking treatment.

[0012] S5. Preparation of the light-transmitting layer: The light-transmitting layer is obtained by extruding and shaping POE through a die;

[0013] S6. The light-transmitting layer is coated onto the coating layer to obtain the light-emitting optical fiber.

[0014] In the above-described method for preparing a light-emitting optical fiber, the method includes the following steps:

[0015] S1. Preparation of fiber core glass block: Mix the raw materials evenly, melt them under inert gas protection, and obtain the fiber core glass block after rapid cooling;

[0016] S2. Preform processing: The fiber core glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0017] S3. Glass fiber preparation: The preformed rod is placed in the drawing tower and drawn to obtain glass fiber;

[0018] S4. Scattering hole engraving: The glass wire is placed in a laser engraving machine and scattering holes are engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel to obtain the original glass wire.

[0019] S5. Preparation of the light-transmitting layer: The light-transmitting layer is obtained by extruding and shaping POE through a die;

[0020] S6. A light-emitting optical fiber is obtained by coating the light-transmitting layer onto the glass filament.

[0021] In the above-mentioned method for preparing light-emitting optical fibers, the melting temperature in step S1 is 1800-2000℃.

[0022] In the above-mentioned method for preparing light-emitting optical fiber, the drawing parameters in step S3 are as follows: drawing temperature is 1900-2050℃, drawing speed is 5-30m / min, and deformation is 0.06-0.08mm.

[0023] In the above-described method for preparing the light-emitting optical fiber, in step S4, the coating layer consists of the following components: 23-25% ZnO, 8-10% K2O, 8-10% Na2O, 2-4% La2O3, 2-4% ZrO2, 0.5-1.5% Li2O, 0.5-0.7% Al2O3, 1-1.2% B2O3, 0.2-0.4% As2O5, 0.1-0.15% BaO, 0.03-0.06% HfO2, 0.01-0.03% TiO2, 0.01-0.04% heat dissipation particles, and the balance being SiO2.

[0024] In the above-mentioned method for preparing light-emitting optical fibers, the heat dissipation particles are graphene.

[0025] In the above-described method for preparing a light-emitting optical fiber, the traction speed in step S4 is 100 m / min.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] (1) The fiber core in the optical fiber can transmit the transmitted light from the incident end to the output end of the optical fiber. The presence of the scattering unit allows some of the transmitted light to leak out from the light-transmitting layer on the optical fiber, thereby forming side light emission, which can replace the existing LED products. Due to the good ductility of the optical fiber, the optical fiber can be deployed in various complex shapes. Moreover, the setting of the fiber core makes the light-emitting optical fiber in this application suitable for harsh environments such as high temperature and high humidity.

[0028] (2) Furthermore, the fiber core configuration allows the light-emitting optical fiber in this application to be used in harsh environments such as high temperature and high humidity.

[0029] (3) Graphene is a carbon element with a hexagonal honeycomb structure formed by carbon sp2 hybridization, forming large conjugated bonds. This structure is very stable. The mean free path of phonons in graphene is much greater than that of phonons in commonly used high thermal conductivity graphite materials and other materials. When carbon atoms collide, the interference on electrons is very small, so electrons move freely, which greatly exceeds the speed of electron movement in general conductors and exceeds the electron mobility of any metal. In addition, electrons move in electron orbits and are not scattered by lattice defects or impurity atoms. Therefore, graphene has excellent heat dissipation performance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of fiber optic light emission according to the present invention;

[0031] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of an optical fiber;

[0032] Figure 3 These are cross-sectional structural diagrams of Examples 1-5;

[0033] Figure 4 These are cross-sectional structural diagrams of Examples 6-10;

[0034] Figure 5 This is a cross-sectional structural schematic diagram of a preferred embodiment.

[0035] In the figure, the fiber core is 100; the light-transmitting layer is 101; the coating layer is 102; and the scattering hole is 103. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] The first aspect of the present invention provides a light-emitting optical fiber, such as... Figure 1 , Figure 2 As shown, it includes multiple fiber cores 100 and a light-transmitting layer 101 covering the fiber cores 100. Each fiber core 100 is provided with a scattering unit. Light propagating inside the fiber core 100 is scattered by the scattering unit and then emitted from the light-transmitting layer 101.

[0039] It is worth mentioning that the light-transmitting layer 101 is made of POE, which can ensure the light emission effect after scattering by the scattering unit, and at the same time, it can surround and protect the scattering unit.

[0040] The fiber core 100 in the optical fiber can transmit the transmitted light from the incident end to the output end of the optical fiber. The presence of the scattering unit allows some of the transmitted light to leak out from the light-transmitting layer 101 on the optical fiber, thereby forming side-emitting light, which can replace existing LED products. Due to the good ductility of the optical fiber, it can be deployed in various complex shapes. Moreover, the setting of the fiber core 100 makes the light-emitting optical fiber in this application suitable for harsh environments such as high temperature and high humidity.

[0041] like Figure 3 As shown, in this specific embodiment, the scattering unit includes a coating layer 102 composed of scattering particles. The coating layer 102 covers the outer surface of the fiber core 100. Light propagating inside the fiber core 100 is scattered by the coating layer 102 and then emitted through the light-transmitting layer 101.

[0042] The presence of scattering particles will enhance the scattering phenomenon. The light in the fiber core 100 is scattered by the coating layer 102 and then emitted through the light-transmitting layer 101 to form the side light emission of the optical fiber. After the scattering particles scatter the light guide, the light emission of the optical fiber is more uniform and the light guide is better.

[0043] The present invention also provides a method for preparing the above-described light-emitting optical fiber, comprising the following steps:

[0044] S1. Preparation of core 100 glass block: Mix the raw materials evenly, melt them at 1800-2000℃ under inert gas protection, and obtain core 100 glass block after rapid cooling;

[0045] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0046] S3. Glass Wire Preparation: The preform is placed in a wire drawing tower and drawn to obtain glass wire. The drawing parameters are as follows: drawing temperature is 1900-2050℃, drawing speed is 5-30m / min, and deformation is 0.06-0.08mm.

[0047] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer 102 and then subjected to ultraviolet baking treatment. The coating layer 102 is composed of the following components: 23-25% ZnO, 8-10% K2O, 8-10% Na2O, 2-4% La2O3, 2-4% ZrO2, 0.5-1.5% Li2O, 0.5-0.7% Al2O3, 1-1.2% B2O3, 0.2-0.4% As2O5, 0.1-0.15% BaO, 0.03-0.06% HfO2, 0.01-0.03% TiO2, 0.01-0.04% heat dissipation particles, and the balance is SiO2. The heat dissipation particles are graphene.

[0048] Graphene is a carbon element with a hexagonal honeycomb structure formed by carbon sp2 hybridization, resulting in large conjugated bonds. This structure is very stable. The mean free path of phonons in graphene is much greater than that of phonons in commonly used high thermal conductivity graphite materials and other materials. When carbon atoms collide, the interference on electrons is very small, allowing electrons to move freely. This greatly exceeds the speed of electron movement in general conductors and the electron mobility of any metal. In addition, electrons move in their orbits without being scattered by lattice defects or impurity atoms. Therefore, graphene has excellent heat dissipation properties.

[0049] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0050] S6. The light-transmitting layer 101 is wrapped around the coating layer 102 to obtain the light-emitting optical fiber.

[0051] A second aspect of the present invention provides a light-emitting optical fiber, such as... Figure 1 As shown, it includes multiple fiber cores 100 and a light-transmitting layer 101 covering the fiber cores 100. Each fiber core 100 is provided with a scattering unit. Light propagating inside the fiber core 100 is scattered by the scattering unit and then emitted from the light-transmitting layer 101.

[0052] It is worth mentioning that the light-transmitting layer 101 is made of POE, which can ensure the light emission effect after scattering by the scattering unit, and at the same time, it can surround and protect the scattering unit.

[0053] The fiber core 100 in the optical fiber can transmit the transmitted light from the incident end to the output end of the optical fiber. The presence of the scattering unit allows some of the transmitted light to leak out from the light-transmitting layer 101 on the optical fiber, thereby forming side-emitting light, which can replace existing LED products. Due to the good ductility of the optical fiber, it can be deployed in various complex shapes. Moreover, the setting of the fiber core 100 makes the light-emitting optical fiber in this application suitable for harsh environments such as high temperature and high humidity.

[0054] like Figure 4 As shown, in this specific embodiment, the scattering unit includes a scattering hole 103 formed in the fiber core.

[0055] By providing a scattering hole 103 inside the fiber core, the light scattering effect inside the fiber core 100 can also be achieved. The light is scattered by the scattering hole 103 and then emitted through the light-transmitting layer 101.

[0056] The present invention also provides a method for preparing the above-described light-emitting optical fiber, comprising the following steps:

[0057] S1. Preparation of core 100 glass block: Mix the raw materials evenly, melt them at 1800-2000℃ under inert gas protection, and obtain core 100 glass block after rapid cooling;

[0058] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0059] S3. Glass Wire Preparation: The preform is placed in a drawing tower and drawn into glass wire. The drawing parameters are as follows: drawing temperature is 1900-2050℃, drawing speed is 5-30m / min, and deformation is 0.06-0.08mm.

[0060] S4. Scattering hole 103 engraving: The glass wire is placed in the laser engraving machine and the scattering hole 103 is engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel at a speed of 100m / min.

[0061] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0062] S6. The light-transmitting layer 101 is wrapped around the glass filament to obtain the light-emitting optical fiber.

[0063] like Figure 5As shown, a third aspect of the specific embodiments of the present invention also provides a light-emitting optical fiber, including multiple fiber cores 100 and a light-transmitting layer 101 covering the fiber cores 100. The outer surface of the fiber cores 100 is coated with a coating layer 102, and a scattering hole 103 is also provided inside the fiber cores 100. Through the dual scattering effect of the coating layer 102 and the scattering hole 103, the light emission effect on the side of the optical fiber is better.

[0064] The following is a detailed description based on specific embodiments.

[0065] Example 1

[0066] like Figure 1 and Figure 2 As shown, this embodiment provides a light-emitting optical fiber, including multiple fiber cores 100 and a light-transmitting layer 101 covering the fiber cores 100. Each fiber core 100 is provided with a scattering unit. Light propagating inside the fiber core 100 is scattered by the scattering unit and then emitted from the light-transmitting layer 101. The scattering unit includes a coating layer 102 composed of scattering particles. The coating layer 102 covers the outer surface of the fiber core 100. Light propagating inside the fiber core 100 is scattered by the coating layer 102 and then emitted from the light-transmitting layer 101. It is prepared by the following method:

[0067] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1800℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0068] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0069] S3. Glass Wire Preparation: The preform is placed in a wire drawing tower and drawn to obtain glass wire. The drawing parameters are as follows: drawing temperature is 1900℃, drawing speed is 5m / min, and deformation is 0.06mm.

[0070] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer 102 and then baked with ultraviolet light. The coating layer 102 is composed of the following components: 23% ZnO, 8% K2O, 8% Na2O, 2% La2O3, 2% ZrO2, 0.5% Li2O, 0.5% Al2O3, 1% B2O3, 0.2% As2O5, 0.1-0.15% BaO, 0.03% HfO2, 0.01% TiO2, 0.01% heat dissipation particles, and the balance is SiO2. The heat dissipation particles are graphene.

[0071] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0072] S6. The light-transmitting layer 101 is wrapped around the coating layer 102 to obtain the light-emitting optical fiber.

[0073] Example 2

[0074] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 1. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0075] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1850℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0076] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0077] S3. Glass Wire Preparation: The preform is placed in a wire drawing tower and drawn to obtain glass wire. The drawing parameters are as follows: drawing temperature is 1920℃, drawing speed is 10m / min, and deformation is 0.065mm.

[0078] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer 102 and then subjected to ultraviolet baking treatment. The coating layer 102 is composed of the following components: 23.5% ZnO, 8.5% K2O, 8.5% Na2O, 2.5% La2O3, 2.5% ZrO2, 0.8% Li2O, 0.55% Al2O3, 1.05% B2O3, 0.25% As2O5, 0.11% BaO, 0.04% HfO2, 0.015% TiO2, 0.02% heat dissipation particles, and the balance is SiO2. The heat dissipation particles are graphene.

[0079] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0080] S6. The light-transmitting layer 101 is wrapped around the coating layer 102 to obtain the light-emitting optical fiber.

[0081] Example 3

[0082] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 1. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0083] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1900℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0084] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0085] S3. Glass Wire Preparation: The preform is placed in a wire drawing tower and drawn to obtain glass wire. The drawing parameters are as follows: drawing temperature is 1980℃, drawing speed is 20m / min, and deformation is 0.07mm.

[0086] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer 102 and then baked with ultraviolet light. The coating layer 102 is composed of the following components: 24% ZnO, 9% K2O, 9% Na2O, 3% La2O3, 3% ZrO2, 1.25% Li2O, 0.6% Al2O3, 1.1% B2O3, 0.3% As2O5, 0.12% BaO, 0.04% HfO2, 0.02% TiO2, 0.03% heat dissipation particles, and the balance is SiO2. The heat dissipation particles are graphene.

[0087] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0088] S6. The light-transmitting layer 101 is wrapped around the coating layer 102 to obtain the light-emitting optical fiber.

[0089] Example 4

[0090] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 1. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0091] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1950℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0092] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0093] S3. Glass Wire Preparation: The preform is placed in a wire drawing tower and drawn to obtain glass wire. The drawing parameters are as follows: drawing temperature is 2000℃, drawing speed is 28m / min, and deformation is 0.075mm.

[0094] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer 102 and then baked with ultraviolet light. The coating layer 102 is composed of the following components: 24.5% ZnO, 9.5% K2O, 8-10% Na2O, 3.5% La2O3, 3.5% ZrO2, 1.4% Li2O, 0.65% Al2O3, 1.15% B2O3, 0.35% As2O5, 0.14% BaO, 0.05% HfO2, 0.025% TiO2, 0.03% heat dissipation particles, and the balance is SiO2. The heat dissipation particles are graphene.

[0095] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0096] S6. The light-transmitting layer 101 is wrapped around the coating layer 102 to obtain the light-emitting optical fiber.

[0097] Example 5

[0098] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 1. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0099] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 2000℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0100] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0101] S3. Glass Wire Preparation: The preform is placed in a wire drawing tower and drawn to obtain glass wire. The drawing parameters are as follows: drawing temperature is 2050℃, drawing speed is 30m / min, and deformation is 0.08mm.

[0102] S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer 102 and then baked with ultraviolet light. The coating layer 102 is composed of the following components: 25% ZnO, 10% K2O, 10% Na2O, 4% La2O3, 4% ZrO2, 1.5% Li2O, 0.7% Al2O3, 1.2% B2O3, 0.4% As2O5, 0.15% BaO, 0.06% HfO2, 0.03% TiO2, 0.04% heat dissipation particles, and the balance is SiO2. The heat dissipation particles are graphene.

[0103] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0104] S6. The light-transmitting layer 101 is wrapped around the coating layer 102 to obtain the light-emitting optical fiber.

[0105] Example 6

[0106] like Figure 1 and Figure 3As shown, this embodiment provides a light-emitting optical fiber including multiple fiber cores 100 and a light-transmitting layer 101 covering the fiber cores 100. Each fiber core 100 is provided with a scattering unit. Light propagating within the fiber core 100 is scattered by the scattering unit and then emitted through the light-transmitting layer 101. The scattering unit includes a scattering aperture 103 opened within the fiber core. By opening the scattering aperture 103 within the fiber core, the light scattering effect within the fiber core 100 can also be achieved. The light is scattered by the scattering aperture 103 and then emitted through the light-transmitting layer 101. The light-emitting optical fiber of this embodiment is prepared by the following method:

[0107] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1800℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0108] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0109] S3. Glass Wire Preparation: The preform is placed in a drawing tower and drawn into glass wire. The drawing parameters are as follows: drawing temperature is 1900℃, drawing speed is 5m / min, and deformation is 0.06mm.

[0110] S4. Scattering hole 103 engraving: The glass wire is placed in the laser engraving machine and the scattering hole 103 is engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel at a speed of 100m / min.

[0111] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0112] S6. The light-transmitting layer 101 is wrapped around the glass filament to obtain the light-emitting optical fiber.

[0113] Example 7

[0114] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 6. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0115] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1850℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0116] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0117] S3. Glass Wire Preparation: The preform is placed in a drawing tower and drawn into glass wire. The drawing parameters are as follows: drawing temperature is 1950℃, drawing speed is 7m / min, and deformation is 0.065mm.

[0118] S4. Scattering hole 103 engraving: The glass wire is placed in the laser engraving machine and the scattering hole 103 is engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel at a speed of 100m / min.

[0119] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0120] S6. The light-transmitting layer 101 is wrapped around the glass filament to obtain the light-emitting optical fiber.

[0121] Example 8

[0122] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 6. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0123] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1900℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0124] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0125] S3. Glass Wire Preparation: The preform is placed in a drawing tower and drawn into glass wire. The drawing parameters are as follows: drawing temperature is 1950℃, drawing speed is 16m / min, and deformation is 0.07mm.

[0126] S4. Scattering hole 103 engraving: The glass wire is placed in the laser engraving machine and the scattering hole 103 is engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel at a speed of 100m / min.

[0127] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0128] S6. The light-transmitting layer 101 is wrapped around the glass filament to obtain the light-emitting optical fiber.

[0129] Example 9

[0130] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 6. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0131] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 1950℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0132] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0133] S3. Glass Wire Preparation: The preform is placed in a drawing tower and drawn into glass wire. The drawing parameters are as follows: drawing temperature is 2000℃, drawing speed is 28m / min, and deformation is 0.075mm.

[0134] S4. Scattering hole 103 engraving: The glass wire is placed in the laser engraving machine and the scattering hole 103 is engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel at a speed of 100m / min.

[0135] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0136] S6. The light-transmitting layer 101 is wrapped around the glass filament to obtain the light-emitting optical fiber.

[0137] Example 10

[0138] This embodiment provides a light-emitting optical fiber with the same structure as in Embodiment 6. The fabrication method of the light-emitting optical fiber in this embodiment is as follows:

[0139] S1. Preparation of the core 100 glass block: The raw materials are mixed evenly and melted at 2000℃ under inert gas protection. After rapid cooling, the core 100 glass block is obtained.

[0140] S2. Preform processing: The fiber core 100 glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube;

[0141] S3. Glass Wire Preparation: The preform is placed in a drawing tower and drawn into glass wire. The drawing parameters are as follows: drawing temperature is 2050℃, drawing speed is 30m / min, and deformation is 0.08mm.

[0142] S4. Scattering hole 103 engraving: The glass wire is placed in the laser engraving machine and the scattering hole 103 is engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel at a speed of 100m / min.

[0143] S5. Preparation of light-transmitting layer 101: POE is extruded through a molding die to obtain light-transmitting layer 101;

[0144] S6. The light-transmitting layer 101 is wrapped around the glass filament to obtain the light-emitting optical fiber.

[0145] Comparative Example 1

[0146] The only difference from Example 3 is that the preparation steps of this comparative light-emitting fiber do not include the coating step. Everything else is the same as in Example 3, and will not be repeated here.

[0147] Comparative Example 2

[0148] The only difference from Example 3 is that the coating layer 102 in the preparation steps of this comparative light-emitting fiber does not contain La2O3. The rest is the same as in Example 3, and will not be repeated here.

[0149] Comparative Example 3

[0150] The only difference from Example 3 is that the coating layer 102 in the preparation steps of this comparative light-emitting fiber does not contain HfO2. The rest is the same as in Example 3, and will not be repeated here.

[0151] Comparative Example 4

[0152] The only difference from Example 3 is that the coating layer 102 in the preparation steps of this comparative light-emitting fiber does not contain As2O5. The rest is the same as in Example 3, and will not be repeated here.

[0153] Comparative Example 5

[0154] The only difference from Example 3 is that the heat dissipation particles in the coating layer 102 of this comparative light-emitting fiber are commercially available heat dissipation particles. The rest is the same as in Example 3, and will not be repeated here.

[0155] Comparative Example 6

[0156] The only difference from Example 3 is that the coating layer 102 in the preparation steps of this comparative light-emitting fiber does not contain heat dissipation particles. Everything else is the same as in Example 3, and will not be repeated here.

[0157] Comparative Example 7

[0158] The only difference from Example 8 is that the structure of this comparative light-emitting fiber does not contain a scattering hole 103. Everything else is the same as Example 8, and will not be repeated here.

[0159] The light-emitting optical fibers obtained in Examples 1-10 and Comparative Examples 1-7 were subjected to performance testing, and the test results are as follows:

[0160] Example <![CDATA[luminance (cd / m 2 )]]> <![CDATA[Dark spot (mm 2 )]]> <![CDATA[Bright spot (mm 2 )]]> Color uniformity (K / m) Example 1 8634 ＜0.2 ＜0.7 128 Example 2 8620 ＜0.2 ＜0.7 125 Example 3 8650 ＜0.2 ＜0.7 130 Example 4 8612 ＜0.2 ＜0.7 129 Example 5 8647 ＜0.2 ＜0.7 124 Example 6 8325 ＜0.2 ＜0.7 128 Example 7 8347 ＜0.2 ＜0.7 126 Example 8 8356 ＜0.2 ＜0.7 131 Example 9 8341 ＜0.2 ＜0.7 127 Example 10 8334 ＜0.2 ＜0.7 125 Comparative Example 1 6587 0.25 0.81 98 Comparative Example 2 7891 ＜0.2 ＜0.7 123 Comparative Example 3 7923 ＜0.2 ＜0.7 122 Comparative Example 4 8011 ＜0.2 ＜0.7 120 Comparative Example 5 7856 ＜0.2 ＜0.7 118 Comparative Example 6 7431 ＜0.2 ＜0.7 111 Comparative Example 7 6752 0.27 0.78 110

[0161] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, 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. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0162] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0163] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for preparing a light-emitting optical fiber, characterized in that, The light-emitting optical fiber includes multiple fiber cores and a light-transmitting layer covering the fiber cores. Each fiber core is provided with a scattering unit. Light propagating within the fiber core is scattered by the scattering unit and then emitted through the light-transmitting layer. The scattering unit includes a coating layer composed of scattering particles. The coating layer covers the outer surface of the fiber core. Light propagating within the fiber core is scattered by the coating layer and then emitted through the light-transmitting layer. The fabrication method includes the following steps: S1. Preparation of fiber core glass block: Mix the raw materials evenly, melt them under inert gas protection, and obtain the fiber core glass block after rapid cooling; S2. Preform processing: The fiber core glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube; S3. Glass fiber preparation: The preformed rod is placed in the drawing tower and drawn to obtain glass fiber; S4. Coating: The glass fiber obtained in step S3 is coated with a coating layer and then subjected to ultraviolet baking treatment. S5. Preparation of the light-transmitting layer: The light-transmitting layer is obtained by extruding and shaping POE through a die; S6. The light-transmitting layer is coated onto the coating layer to obtain the light-emitting optical fiber; In step S4, the coating layer consists of the following components: 23-25% ZnO, 8-10% K2O, 8-10% Na2O, 2-4% La2O3, 2-4% ZrO2, 0.5-1.5% Li2O, 0.5-0.7% Al2O3, 1-1.2% B2O3, 0.2-0.4% As2O5, 0.1-0.15% BaO, 0.03-0.06% HfO2, 0.01-0.03% TiO2, 0.01-0.04% heat dissipation particles, and the balance is SiO2.

2. A method for preparing a light-emitting optical fiber, characterized in that, The light-emitting optical fiber includes multiple fiber cores and a light-transmitting layer covering the fiber cores. Each fiber core is provided with a scattering unit. Light propagating within the fiber core is scattered by the scattering unit and then emitted through the light-transmitting layer. The scattering unit includes a scattering hole formed within the fiber core. The fabrication method includes the following steps: S1. Preparation of fiber core glass block: Mix the raw materials evenly, melt them under inert gas protection, and obtain the fiber core glass block after rapid cooling; S2. Preform processing: The fiber core glass block is placed in a tubular cladding material to obtain a preform, wherein the tubular cladding material is a quartz glass tube; S3. Glass fiber preparation: The preformed rod is placed in the drawing tower and drawn to obtain glass fiber; S4. Scattering hole engraving: The glass wire is placed in a laser engraving machine and scattering holes are engraved according to the design parameters. Then, the glass wire is drawn by the traction wheel to obtain the original glass wire. S5. Preparation of the light-transmitting layer: The light-transmitting layer is obtained by extruding and shaping POE through a die; S6. A light-emitting optical fiber is obtained by coating the light-transmitting layer onto the glass filament.

3. The preparation method according to claim 1 or 2, characterized in that, In step S1, the melting temperature is 1800-2000℃.

4. The preparation method according to claim 1 or 2, characterized in that, In step S3, the drawing parameters are as follows: drawing temperature is 1900-2050℃, drawing speed is 5-30m / min, and deformation is 0.06-0.08mm.

5. The preparation method according to claim 1, characterized in that, The heat dissipation particles are graphene.

6. The preparation method according to claim 2, characterized in that, In step S4, the traction speed is 100 m / min.

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