High temperature resistant optical fiber and manufacturing method thereof

Abstract

The present invention discloses a high temperature resistant optical fiber and a manufacturing method thereof, wherein the high temperature resistant optical fiber includes an outer package structure, a heat isolation structure, an inner package structure and a hollow core structure from the outside to the inside. The present invention adopts a hollow structure, has a strong resistance to electromagnetic interference, stable and reliable signal transmission, relatively low optical loss, can effectively reduce signal attenuation, improve transmission efficiency, and is not easily affected by heat to cause a decrease in signal transmission quality. In addition, a spirally distributed silica photonic crystal is arranged on the outer surface of a hollow pipe of the hollow core structure, which can change the phase distribution of the optical signal, realize phase regulation and modulation of the optical signal, and expand the function and performance of the optical fiber system. In addition, a mixed gas formed by argon and helium is filled inside the hollow pipe, which can adjust the properties of the filling gas, balance thermal conductivity and thermal expansion effect, so as to meet the needs in a specific high temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber manufacturing, and in particular to a high temperature resistant optical fiber and a manufacturing method thereof. Background Art

[0002] With the expansion of optical fiber application fields, more applications in special environments such as high temperature have been promoted. In the design of high-temperature optical fiber, high-temperature resistant acrylic resin, silicone rubber, polyimide, polyetheretherketone, etc. are generally used as coating materials; and different coating processes are used to manufacture them to meet the performance under different temperatures.

[0003] At present, China's patent application number: CN202210474147.9 discloses a high-temperature resistant optical fiber composite cable, including a power cable and a first insulating layer, a conductor layer, a winding layer, a first shielding layer, a first armor layer, an insulation layer and an outer sheath that wrap the power cable in sequence from the inside to the outside in radial direction. The power cable of the composite cable includes an inner conductor and a high-temperature resistant insulation layer wrapping the inner conductor; the first insulation layer includes a double-layer insulating tube, a connecting strip and a conductive powder, the connecting strip separates the double-layer insulating tube into a plurality of cavities, and the conductive powder is filled in the cavity; the optical fiber cable is filled in the first armor layer, and a temperature measuring optical fiber is also provided on one side of the optical fiber cable to detect the temperature inside the high-temperature resistant optical fiber composite cable by the temperature measuring optical fiber.

[0004] However, high-temperature resistant optical fibers in the prior art usually use solid materials as the core, and the optical loss during signal transmission is relatively high. They are easily affected by heat, resulting in a decrease in signal transmission quality. In addition, it is inconvenient to change the phase distribution of the optical signal, and it is not easy to achieve regulation and modulation of the phase of the optical signal. The expansion function and performance of the optical fiber are relatively poor. Summary of the invention

[0005] The object of the present invention is to provide a high temperature resistant optical fiber and a method for manufacturing the same, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-temperature resistant optical fiber, whose structure includes an outer covering structure, a thermal isolation structure, an inner covering structure and a hollow core structure from the outside to the inside, the outer covering structure is connected to the thermal isolation structure through an adhesive coating, the thermal isolation structure is connected to the inner covering structure through an adhesive coating, the inner covering structure and the hollow core structure are connected through an optical adhesive, the hollow core structure includes a silica photonic crystal spirally wound and distributed on the outer surface of a hollow pipe, a metal support wire radially arranged on the inner wall of the hollow pipe, and a mixed gas filled in the hollow pipe, the outer surface of the silica photonic crystal is connected to the inner covering structure, the metal support wire is a grid structure, and the mixed gas is a mixture of argon and helium.

[0007] Preferably, the outer packaging structure includes a high-temperature resistant layer, a stainless steel wire tensile layer and a fluororubber layer arranged from the outside to the inside, the stainless steel wire tensile layer is thermally fused between the high-temperature resistant layer and the fluororubber layer, the outer surface of the high-temperature resistant layer is sprayed with a wear-resistant coating, and the side of the fluororubber layer away from the high-temperature resistant layer is connected to the thermal isolation structure through an adhesive coating.

[0008] Preferably, the high temperature resistant layer is composed of polyimide and carbon fiber, and the stainless steel wire tensile layer is distributed in a gear-like structure.

[0009] Preferably, the thermal isolation structure comprises a zirconium oxide layer whose outer surface is connected to the outer package structure and a vacuum layer arranged inside the zirconium oxide layer, and the side of the vacuum layer away from the zirconium oxide layer is connected to the inner package structure.

[0010] Preferably, the inner packaging structure includes a fiber woven composite layer whose outer surface is connected to the thermal isolation structure and an aluminum oxide layer arranged on the inner side of the fiber woven composite layer, the fiber woven composite layer is woven from carbon fiber and silicon fiber, and the inner side of the aluminum oxide layer is connected to the hollow core structure through an optical adhesive.

[0011] In addition, the present invention provides a method for manufacturing a high temperature resistant optical fiber, comprising the following steps:

[0012] S1. Prefabricate the outer shell structure, thermal isolation structure, inner shell structure and hollow core structure;

[0013] S2. During the prefabrication process of the hollow core structure, a winding device is used to wind the silicon dioxide photonic crystal radially and spirally around the outer surface of the hollow pipe;

[0014] S3. Assemble the prefabricated outer packaging structure, thermal isolation structure, inner packaging structure and hollow core structure to ensure the connection quality and stability between the components;

[0015] S4, drawing the assembled structure, coating and curing the surface to ensure that the coating is firmly adhered to the surface to form a high temperature resistant optical fiber;

[0016] S5. Conduct optical, mechanical and thermal performance tests on the prepared high-temperature resistant hollow structure optical fiber to ensure stable product quality.

[0017] Preferably, the winding device includes a base plate and a spiral winding mechanism and a guide mechanism respectively arranged on the left and right sides of the top of the base plate, the guide mechanism includes a vertical plate fixed to the bottom and the base plate, a support block connected to the top of the left side of the vertical plate, a threaded rod rotating through the middle of the inner side of the support block, an internal thread block threadedly connected to the rear side of the outer surface of the threaded rod, a rotating frame rotatably connected to the right part of the internal thread block, a ring frame arranged on the left side of the rotating frame, and a supporting assembly extending through the inner side of the ring frame, the right side of the rotating frame is rotatably connected to the vertical plate, and the right side of the supporting assembly is connected to the vertical plate, the spiral winding mechanism includes a seat fixed to the bottom and the base plate, a driving assembly extending through the bottom of the left side of the seat, a circular ring block connected to the top side of the driving assembly, a first small guide wheel, a second small guide wheel and a third small guide wheel rotatably arranged on the front, middle and rear sides of the top of the circular ring block, and a reel rotatably connected to the left side of the circular ring block, the circular ring block extends and rotates through the upper side of the inner side of the seat, and the right ends of the first small guide wheel, the second small guide wheel and the third small guide wheel are all rotatably connected to the seat.

[0018] Preferably, the outer side wall of the ring frame is provided with three arc-shaped grooves, the supporting components are provided with three and are evenly distributed, and the three supporting components are respectively located on the inner sides of the three arc-shaped grooves.

[0019] Preferably, the supporting assembly includes a positioning block connected to the vertical plate on the right side, a rotating rod rotatably connected to the left side of the positioning block, a sliding sleeve wrapped and slid on the outer surface of the rotating rod, a support wheel arranged at the top end of the rotating rod, and a ball bearing rotatably connected to the outer surface of the support wheel, the sliding sleeve passes through and rotates on the inner side of the ring frame, and the ball bearings are provided with no less than five and are evenly distributed on the upper half of the outer surface of the support wheel.

[0020] Preferably, the driving assembly includes a driving motor fastened to the lower middle portion of the right side of the stand, a main pulley connected to the left output end of the driving motor, a transmission belt wrapped around the lower side of the outer surface of the main pulley, and a first slave pulley, a second slave pulley and a third slave pulley arranged above the main pulley, the inner side of the transmission belt is in transmission contact with the first slave pulley, the second slave pulley and the third slave pulley respectively, and the top side of the transmission belt is in transmission contact with the circular ring block, the middle parts of the right sides of the main pulley, the first slave pulley, the second slave pulley and the third slave pulley are all rotatably connected to the stand, the first slave pulley is arranged at the lower middle side of the front part of the circular ring block, the second slave pulley is arranged at the middle side of the bottom of the circular ring block, and the third slave pulley is arranged at the lower middle side of the rear part of the circular ring block.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The high temperature resistant optical fiber of the present invention comprises an outer sheath structure, a thermal isolation structure, an inner sheath structure and a hollow core structure from the outside to the inside. The hollow structure has strong resistance to electromagnetic interference, stable and reliable signal transmission, and relatively low optical loss during signal transmission, which can effectively reduce signal attenuation and improve transmission efficiency. At the same time, it can maintain good performance in a high temperature environment and is not easily affected by heat and causes a decrease in signal transmission quality. In addition, a spirally distributed silica photonic crystal is arranged on the outer surface of the hollow pipe of the hollow core structure, which can change the phase distribution of the optical signal and realize phase regulation and modulation of the optical signal. The special properties and effects brought by the spiral structure are used to expand the functions and performance of the optical fiber system. The mixed gas formed by argon and helium is filled in the hollow pipe, which can adjust the properties of the filling gas and balance the thermal conductivity and thermal expansion effect to meet the needs in a specific high temperature environment.

[0023] The present invention can significantly improve the tensile performance, mechanical strength and durability by thermally fusing a stainless steel wire tensile layer distributed in a gear-like structure between a high-temperature resistant layer and a fluororubber layer to form an outer cladding layer; a zirconium oxide layer and a vacuum layer are combined to form a thermal isolation structure, which has good high-temperature resistance, can reduce the attenuation during optical signal transmission, extend the transmission distance and service life of the optical fiber, and improve the transmission performance, stability and reliability; a fiber braided composite layer and an aluminum oxide layer are used in the inner cladding structure, and the fiber braided composite layer is woven from carbon fiber and silicon fiber, has high-temperature resistance, can increase the overall mechanical strength, and improve the ability to resist wear and external impact. The setting of the aluminum oxide layer can improve the insulation performance of the optical fiber and reduce the influence of external electromagnetic interference on the transmission of optical signals.

[0024] In the manufacturing process of high-temperature resistant optical fiber, the present invention optimizes the setting of winding equipment to process the outer surface of the hollow pipe, and the silica photonic crystals are rolled and installed on the spiral winding mechanism. The hollow pipe is transported through the inner side of the spiral winding mechanism by the guide mechanism, and then the spiral winding mechanism is controlled to move and the external tension device is used to pull the hollow pipe so that the silica photonic crystals are radially distributed in a spiral shape on the outer surface of the hollow pipe, so as to expand the function and performance of the optical fiber system through the silica photonic crystals distributed in a spiral structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the outsourcing structure of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the connection of the thermal isolation structure, the inner package structure and the hollow core structure of the present invention;

[0028] Figure 4 It is a flowchart of the method for manufacturing high temperature resistant optical fiber of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the winding device of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the guide mechanism of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the support assembly of the present invention;

[0032] Figure 8 It is a schematic structural diagram of the spiral winding mechanism of the present invention.

[0033] In the figure: outer package structure-1, thermal isolation structure-2, inner package structure-3, hollow core structure-4, high temperature resistant layer-11, stainless steel wire tensile layer-12, fluororubber layer-13, wear-resistant coating-14, zirconium oxide layer-21, vacuum layer-22, fiber braided composite layer-31, aluminum oxide layer-32, silicon dioxide photonic crystal-41, hollow pipe-42, metal support wire-43, mixed gas-44, bottom plate-5, guide mechanism-6, spiral winding mechanism-7, vertical plate-61, support block-62, threaded rod-63, Internal thread block -64, rotating frame -65, ring frame -66, supporting assembly -67, arc groove -661, positioning block -671, rotating rod -672, sliding sleeve -673, supporting wheel -674, ball -675, stand -71, driving assembly -72, circular ring block -73, first small guide wheel -74, second small guide wheel -75, third small guide wheel -76, reel -77, driving motor -721, main pulley -722, transmission belt -723, first slave pulley -724, second slave pulley -725, third slave pulley -726. DETAILED DESCRIPTION

[0034] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0035] See also Figure 1 , Figure 2 and Figure 3The present invention provides a high temperature resistant optical fiber, which comprises an outer package structure 1, a heat isolation structure 2, an inner package structure 3 and a hollow core structure 4 from the outside to the inside. The outer package structure 1 is connected to the heat isolation structure 2 through an adhesive coating, and the heat isolation structure 2 is connected to the inner package structure 3 through an adhesive coating. The inner package structure 3 and the hollow core structure 4 are connected through an optical adhesive. The hollow structure has a strong resistance to electromagnetic interference, stable and reliable signal transmission, and relatively low optical loss during signal transmission, which can effectively reduce signal attenuation and improve transmission efficiency. At the same time, it can maintain good performance in a high temperature environment and is not easily affected by heat to cause a decrease in signal transmission quality. The hollow core structure 4 includes a spiral The silicon dioxide photonic crystal 41 is wound around the outer surface of the hollow pipe 42 in a spiral shape, which can change the phase distribution of the optical signal, realize the phase control and modulation of the optical signal, and use the special properties and effects brought by the spiral structure to expand the functions and performance of the optical fiber system. The metal support wire 43 is radially arranged on the inner wall of the hollow pipe 42 and the mixed gas 44 filled in the hollow pipe 42. The metal support wire 43 is a grid structure, and the shape and stability of the hollow structure are maintained by the metal support wire 43. The outer surface of the silicon dioxide photonic crystal 41 is connected to the inner package structure 3. The mixed gas 44 is a mixture of argon and helium, which can adjust the properties of the filling gas and balance the thermal conductivity and thermal expansion effect to meet the needs in a specific high temperature environment;

[0036] Among them, the outer packaging structure 1 includes a high-temperature resistant layer 11, a stainless steel wire tensile layer 12 and a fluororubber layer 13 arranged from the outside to the inside. The high-temperature resistant layer 11 is composed of polyimide and carbon fiber, and has strong high-temperature resistance and corrosion resistance. The stainless steel wire tensile layer 12 is thermally fused between the high-temperature resistant layer 11 and the fluororubber layer 13, and the stainless steel wire tensile layer 12 is distributed in a gear-like structure, which can significantly improve the tensile performance, mechanical strength and durability. The outer surface of the high-temperature resistant layer 11 is sprayed with a wear-resistant coating 14 to protect the surface and provide additional mechanical support. The side of the fluororubber layer 13 away from the high-temperature resistant layer 11 is connected to the thermal isolation structure 2 through an adhesive coating. The thermal isolation structure 2 includes a zirconium oxide layer 21 connected to the outer packaging structure 1 on the outer surface and a vacuum layer 22 arranged inside the zirconium oxide layer 21. The side of the layer 22 away from the zirconium oxide layer 21 is connected to the inner packaging structure 3. The combination of the zirconium oxide layer 21 and the vacuum layer 22 has good high temperature resistance, which can reduce the attenuation of optical signals during transmission, extend the transmission distance and service life of the optical fiber, and improve the transmission performance, stability and reliability. The inner packaging structure 3 includes a fiber woven composite layer 31 whose outer surface is connected to the thermal isolation structure 2 and an aluminum oxide layer 32 arranged on the inner side of the fiber woven composite layer 31. The fiber woven composite layer 31 is woven from carbon fiber and silicon fiber. The inner side of the aluminum oxide layer 32 is connected to the hollow core structure 4 through an optical adhesive, has high temperature resistance, can increase the overall mechanical strength, and improve the ability to resist wear and external impact. The setting of the aluminum oxide layer 32 can improve the insulation performance of the optical fiber and reduce the influence of external electromagnetic interference on the transmission of optical signals.

[0037] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The present invention provides a method for manufacturing a high temperature resistant optical fiber, comprising the following steps:

[0038] S1, prefabricate the outer package structure 1, the thermal isolation structure 2, the inner package structure 3 and the hollow core structure 4;

[0039] S2. During the prefabrication process of the hollow core structure 4, the silicon dioxide photonic crystal 41 is radially spirally wound on the outer surface of the hollow pipe 42 using a winding device;

[0040] S3, assembling the prefabricated outer package structure 1, thermal isolation structure 2, inner package structure 3 and hollow core structure 4 to ensure the connection quality and stability between the components;

[0041] S4, drawing the assembled structure, coating and curing the surface to ensure that the coating is firmly adhered to the surface to form a high temperature resistant optical fiber;

[0042] S5. Conduct optical, mechanical and thermal performance tests on the prepared high-temperature resistant hollow structure optical fiber to ensure stable product quality.

[0043] The winding device includes a bottom plate 5 and a spiral winding mechanism 7 and a guide mechanism 6 respectively arranged on the left and right sides of the top of the bottom plate 5. The silicon dioxide photonic crystal 41 is rolled up and installed on the spiral winding mechanism 7. The hollow pipe 42 is transported through the inner side of the spiral winding mechanism 7 by the guide mechanism 6. Then, the spiral winding mechanism 7 is controlled to move and the external tension device pulls the hollow pipe 42 to make the silicon dioxide photonic crystal 41 radially distributed on the outer surface of the hollow pipe 42 in a spiral shape, so as to expand the function and performance of the optical fiber system through the silicon dioxide photonic crystal 41 distributed in a spiral structure. The guide mechanism 6 includes a vertical plate 61 fixed to the bottom plate 5, a vertical plate 61 connected to the vertical plate 61, and a vertical plate 61 connected to the vertical plate 61. The support block 62 at the top of the left side of the plate 61, the threaded rod 63 that passes through and rotates in the middle of the inner side of the support block 62, the internal thread block 64 that is threadedly connected to the rear side of the outer surface of the threaded rod 63, the rotating frame 65 that is rotatably connected to the right side of the internal thread block 64, the ring frame 66 that is set on the left side of the rotating frame 65, and the supporting assembly 67 that passes through and is set inside the ring frame 66, the right side of the rotating frame 65 is rotatably connected to the vertical plate 61, when the threaded rod 63 is rotated, the rotating frame 65 is rotated to the inner side of the vertical plate 61 through the cooperation between the threaded rod 63 and the internal thread block 64, and the ring frame 66 rotates synchronously with the rotating frame 65, the right side of the supporting assembly 67 is connected to the vertical plate 61, and the outer side wall of the ring frame 66 is provided with three arcs shaped groove 661, three supporting assemblies 67 are provided and are equidistantly distributed, and the three supporting assemblies 67 are respectively located on the inner sides of the three arc-shaped grooves 661, so as to drive the three supporting assemblies 67 to move when the ring frame 66 rotates, and the hollow pipe 42 is clamped on the inner side by the three supporting assemblies 67, and the spiral winding mechanism 7 includes a stand 71 whose bottom is fixed to the bottom plate 5, a driving assembly 72 which is arranged through the lower part of the left side of the stand 71, a circular ring block 73 connected to the top side of the driving assembly 72, a first small guide wheel 74, a second small guide wheel 75 and a third small guide wheel 76 which are respectively rotatably arranged on the front, middle and rear sides of the top of the circular ring block 73, and a rotating drive assembly 72 which is connected to the left side of the circular ring block 73. The reel 77 of the upper part rotates the ring block 73 inside the first small guide wheel 74, the second small guide wheel 75 and the third small guide wheel 76 under the action of the driving assembly 72, and the silicon dioxide photonic crystal 41 is rolled up and installed on the reel 77. When the ring block 73 rotates, the rolled silicon dioxide photonic crystal 41 is driven to rotate in a circle, so that the silicon dioxide photonic crystal 41 is spirally wrapped and distributed on the outer surface of the hollow pipe 42 through the displacement of the hollow pipe 42. The ring block 73 penetrates and rotates on the upper side of the stand 71. The right ends of the first small guide wheel 74, the second small guide wheel 75 and the third small guide wheel 76 are all rotatably connected to the stand 71 to ensure the stability of the rotation of the ring block 73.

[0044] The support assembly 67 includes a positioning block 671 connected to the right side of the vertical plate 61, a rotating rod 672 rotatably connected to the left side of the positioning block 671, a sliding sleeve 673 wrapped and slidable on the outer surface of the rotating rod 672, a support wheel 674 arranged at the top end of the rotating rod 672, and a ball 675 rotatably connected to the outer surface of the support wheel 674. The sliding sleeve 673 penetrates and rotates on the inner side of the ring frame 66. When the ring frame 66 rotates, the sliding sleeve 673 is driven to shift, so that the sliding sleeve 673 moves on the surface of the rotating rod 672, so that the rotating rod 672 moves in the arc The hollow pipe 42 is moved in the shaped groove 661 so that the three rotating rods 672 can clamp the hollow pipe 42 on the support wheel 674 and contact the ball 675. The ball 675 is provided with no less than five and is evenly distributed on the upper half of the outer surface of the support wheel 674, so that the hollow pipe 42 can be laterally displaced after contacting the ball 675. The driving assembly 72 includes a driving motor 721 fastened to the middle and lower part of the right side of the stand 71, a main pulley 722 connected to the output end of the left side of the driving motor 721, and a main pulley 722 wrapped around the main pulley 721. The transmission belt 723 on the lower side of the outer surface of the pulley 722 and the first slave pulley 724, the second slave pulley 725 and the third slave pulley 726 arranged above the main pulley 722, the inner side of the transmission belt 723 is in transmission contact with the first slave pulley 724, the second slave pulley 725 and the third slave pulley 726 respectively, and the top side of the transmission belt 723 is in transmission contact with the circular ring block 73, and under the action of the driving motor 721, the main pulley 722 drives the transmission belt 723 to rotate on the first slave pulley 724, the second slave pulley 725 and the third slave pulley 72 6, the main pulley 722, the first slave pulley 724, the second slave pulley 725 and the third slave pulley 726 are all rotatably connected to the stand 71 in the middle of the right side, playing a supporting role to ensure the stability of rotation. The first slave pulley 724 is set at the middle and lower side of the front part of the circular ring block 73, the second slave pulley 725 is set at the middle side of the bottom of the circular ring block 73, and the third slave pulley 726 is set at the middle and lower side of the rear part of the circular ring block 73. The contact between the transmission belt 723 and the circular ring block 73 makes the circular ring block 73 perform a rotation action on the stand 71;

[0045] When winding the silicon dioxide photonic crystal 41 on the hollow pipe 42, firstly, the silicon dioxide photonic crystal 41 is rolled and installed on the reel 77, the hollow pipe is passed through the inner side of the ring frame 66, and then passed out from the inside of the circular ring block 73, and then the threaded rod 63 is rotated by a tool, and when the threaded rod 63 is rotated, the rotating frame 65 and the ring frame 66 are driven to rotate on the inner side of the vertical plate 61 through the cooperation with the internal threaded block 64, and when the ring frame 66 rotates, the three internal sliding sleeves 673 are driven to move on the surface of the rotating rod 672, so that after the three rotating rods 672 are moved, the hollow pipe 42 is clamped on the support wheel 674 and contacts with the ball 675, and then the outermost end of the silicon dioxide photonic crystal 41 is wound on the hollow pipe, and then the external tension device is used. The portion of the hollow pipe 42 extending from the left side of the circular ring block 73 is pulled. During the pulling process of the hollow pipe 42, the drive motor 721 is controlled to start. Under the action of the drive motor 721, the main pulley 722 drives the transmission belt 723 to rotate on the first slave pulley 724, the second slave pulley 725 and the third slave pulley 726. Through the contact between the transmission belt 723 and the circular ring block 73, the circular ring block 73 is rotated on the inner side of the first small guide wheel 74, the second small guide wheel 75 and the third small guide wheel 76, so that the reel 77 on the circular ring block 73 drives the rolled silica photonic crystal 41 to rotate in a circle, and then through the displacement of the hollow pipe 42, the silica photonic crystal 41 is spirally wrapped and distributed on the outer surface of the hollow pipe.

[0046] The present invention discloses a high temperature resistant optical fiber and a manufacturing method thereof. The high temperature resistant optical fiber comprises an outer package structure 1, a heat isolation structure 2, an inner package structure 3 and a hollow core structure 4 from the outside to the inside. The hollow structure has strong resistance to electromagnetic interference, stable and reliable signal transmission, and relatively low optical loss during signal transmission, which can effectively reduce signal attenuation and improve transmission efficiency. At the same time, it can maintain good performance in a high temperature environment and is not easily affected by heat, resulting in a decrease in signal transmission quality. In addition, a spirally distributed silica photon is arranged on the outer surface of the hollow pipe 42 of the hollow core structure 4. The crystal 41 can change the phase distribution of the optical signal, realize the phase control and modulation of the optical signal, and use the special properties and effects brought by the spiral structure to expand the functions and performance of the optical fiber system. The mixed gas 44 formed by argon and helium is filled in the hollow pipe 42 to adjust the properties of the filling gas and balance the thermal conductivity and thermal expansion effect to meet the needs of a specific high-temperature environment. The stainless steel wire tensile layer 12 distributed in a gear-like structure is thermally fused between the high-temperature resistant layer 11 and the fluororubber layer 13 to form an outer cladding, which can significantly improve the tensile performance, mechanical strength and durability. The zirconium oxide layer 21 and the vacuum layer 22 are combined to form a thermal isolation structure, which has good high temperature resistance, can reduce the attenuation of optical signal transmission, extend the transmission distance and service life of the optical fiber, and improve the transmission performance, stability and reliability; a fiber braided composite layer 31 and an aluminum oxide layer 32 are used in the inner package structure 3. The fiber braided composite layer 31 is woven from carbon fiber and silicon fiber, has high temperature resistance, can increase the overall mechanical strength, and improve the ability to resist wear and external impact. The setting of the aluminum oxide layer 32 can improve the insulation performance of the optical fiber and reduce external electromagnetic interference. Impact on optical signal transmission; During the manufacturing process of high-temperature resistant optical fiber, the winding equipment is optimized to process the outer surface of the hollow pipe 42, and the silica photonic crystals 41 are rolled and installed on the spiral winding mechanism 7. The hollow pipe 42 is transported through the guide mechanism 6 to pass through the inside of the spiral winding mechanism 7, and then the spiral winding mechanism 7 is controlled to move and the external tension device pulls the hollow pipe 42 so that the silica photonic crystals 41 are radially distributed in a spiral shape on the outer surface of the hollow pipe 42, so as to expand the function and performance of the optical fiber system through the silica photonic crystals 41 distributed in a spiral structure.

[0047] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature resistant optical fiber, characterized in that: The structure comprises, from the outside to the inside, an outer package structure (1), a heat isolation structure (2), an inner package structure (3) and a hollow core structure (4); the inner portion of the outer package structure (1) is connected to the heat isolation structure (2) via an adhesive coating, the inner portion of the heat isolation structure (2) is connected to the inner package structure (3) via an adhesive coating, the inner package structure (3) and the hollow core structure (4) are connected via an optical adhesive, the hollow core structure (4) comprises a silicon dioxide photonic crystal (41) spirally wound and distributed on the outer surface of a hollow pipe (42), a metal support wire (43) radially arranged on the inner wall of the hollow pipe (42), and a mixed gas (44) filled in the hollow pipe (42); the outer surface of the silicon dioxide photonic crystal (41) is connected to the inner package structure (3), the metal support wire (43) is a grid-like structure, and the mixed gas (44) is a mixture of argon and helium.

2. The high temperature resistant optical fiber according to claim 1, characterized in that: The outer packaging structure (1) comprises a high temperature resistant layer (11), a stainless steel wire tensile layer (12) and a fluororubber layer (13) arranged from the outside to the inside, the stainless steel wire tensile layer (12) is thermally fused between the high temperature resistant layer (11) and the fluororubber layer (13), the outer surface of the high temperature resistant layer (11) is sprayed with a wear-resistant coating (14), and the side of the fluororubber layer (13) away from the high temperature resistant layer (11) is connected to the thermal isolation structure (2) via an adhesive coating.

3. The high temperature resistant optical fiber according to claim 2, characterized in that: The high temperature resistant layer (11) is composed of polyimide and carbon fiber, and the stainless steel wire tensile layer (12) is distributed in a gear-like structure.

4. The high temperature resistant optical fiber according to claim 1, characterized in that: The thermal isolation structure (2) comprises a zirconium oxide layer (21) whose outer surface is connected to the outer packaging structure (1) and a vacuum layer (22) arranged inside the zirconium oxide layer (21), wherein the vacuum layer (22) is connected to the inner packaging structure (3) on a side away from the zirconium oxide layer (21).

5. The high temperature resistant optical fiber according to claim 1, characterized in that: The inner package structure (3) comprises a fiber braided composite layer (31) whose outer surface is connected to the thermal isolation structure (2) and an aluminum oxide layer (32) arranged on the inner side of the fiber braided composite layer (31), wherein the fiber braided composite layer (31) is woven from carbon fibers and silicon fibers, and the inner side of the aluminum oxide layer (32) is connected to the hollow core structure (4) via an optical adhesive.

6. A method for manufacturing a high temperature resistant optical fiber according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, prefabricate an outer package structure (1), a thermal isolation structure (2), an inner package structure (3) and a hollow core structure (4); S2. During the prefabrication process of the hollow core structure (4), a winding device is used to radially spirally wind the silicon dioxide photonic crystal (41) around the outer surface of the hollow pipe (42); S3, assembling the prefabricated outer package structure (1), the thermal isolation structure (2), the inner package structure (3) and the hollow core structure (4) to ensure the connection quality and stability between the components; S4, drawing the assembled structure, coating and curing the surface to ensure that the coating is firmly adhered to the surface to form a high temperature resistant optical fiber; S5. Conduct optical, mechanical and thermal performance tests on the prepared high-temperature resistant hollow structure optical fiber to ensure stable product quality.

7. The method for manufacturing a high temperature resistant optical fiber according to claim 6, characterized in that: The winding device comprises a bottom plate (5) and a spiral winding mechanism (7) and a guide mechanism (6) respectively arranged on the left and right sides of the top of the bottom plate (5); the guide mechanism (6) comprises a vertical plate (61) fixed to the bottom of the bottom plate (5), a support block (62) connected to the top of the left side of the vertical plate (61), a threaded rod (63) passing through and rotating in the middle of the inner side of the support block (62), an internal thread block (64) threadedly connected to the rear side of the outer surface of the threaded rod (63), a rotating frame (65) rotatably connected to the right side of the internal thread block (64), a ring frame (66) arranged on the left side of the rotating frame (65), and a support assembly (67) passing through and arranged on the inner side of the ring frame (66); the right side of the rotating frame (65) is rotatably connected to the vertical plate (61); the support assembly The right side of the spiral winding mechanism (7) is connected to the vertical plate (61), and the spiral winding mechanism (7) includes a vertical seat (71) fixed to the bottom with the bottom plate (5), a driving assembly (72) penetrating and arranged below the left side of the vertical seat (71), a circular ring block (73) connected to the top side of the driving assembly (72), a first small guide wheel (74), a second small guide wheel (75) and a third small guide wheel (76) rotatably arranged on the front, middle and rear sides of the top of the circular ring block (73), and a reel (77) rotatably connected to the left side of the circular ring block (73), the circular ring block (73) penetrating and rotatably connecting to the upper side of the vertical seat (71), and the right ends of the first small guide wheel (74), the second small guide wheel (75) and the third small guide wheel (76) are all rotatably connected to the vertical seat (71).

8. The method for manufacturing a high temperature resistant optical fiber according to claim 7, characterized in that: The outer wall of the ring frame (66) is provided with three arc-shaped grooves (661), and the support components (67) are provided in three and are evenly distributed, and the three support components (67) are respectively located inside the three arc-shaped grooves (661).

9. The method for manufacturing a high temperature resistant optical fiber according to claim 7, characterized in that: The support assembly (67) comprises a positioning block (671) connected to the upright plate (61) on the right side, a rotating rod (672) rotatably connected to the left side of the positioning block (671), a sliding sleeve (673) wrapped and slidably on the outer surface of the rotating rod (672), a support wheel (674) arranged at the top end of the rotating rod (672), and a ball (675) rotatably connected to the outer surface of the support wheel (674), the sliding sleeve (673) penetrates and rotates on the inner side of the ring frame (66), and the ball (675) is provided with no less than five and is evenly distributed on the upper half of the outer surface of the support wheel (674).

10. The method for manufacturing a high temperature resistant optical fiber according to claim 7, characterized in that: The driving assembly (72) comprises a driving motor (721) fastened to the middle and lower part of the right side of the stand (71), a main pulley (722) connected to the output end of the left side of the driving motor (721), a transmission belt (723) wrapped around the lower side of the outer surface of the main pulley (722), and a first slave pulley (724), a second slave pulley (725) and a third slave pulley (726) arranged above the main pulley (722), wherein the inner side of the transmission belt (723) is respectively connected to the first slave pulley (724), the second slave pulley (725) and the third slave pulley (726). The belt pulley (726) is in transmission contact, and the top side of the transmission belt (723) is in transmission contact with the circular ring block (73); the middle parts of the right sides of the main belt pulley (722), the first slave belt pulley (724), the second slave belt pulley (725) and the third slave belt pulley (726) are all rotatably connected to the stand (71); the first slave belt pulley (724) is arranged at the middle and lower side of the front part of the circular ring block (73); the second slave belt pulley (725) is arranged at the middle side of the bottom of the circular ring block (73); and the third slave belt pulley (726) is arranged at the middle and lower side of the rear part of the circular ring block (73).

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