Anti-resonance hollow-core optical fiber drawing pressurization device and pressurization method

Abstract

The invention provides an anti-resonance hollow-core optical fiber drawing pressurization device and method, the pressurization device comprises an air storage tank, a first partial pressure area, a variable pressure area and a second partial pressure area which are connected in sequence, the first partial pressure area comprises a first multi-way valve, and the initial air pressure of the air storage tank is divided into multiple paths of first air pressure; the variable-pressure area comprises a plurality of variable-pressure valves which are arranged in parallel and are used for adjusting the pressure values of multiple paths of first air pressures corresponding to different air pressures required by the drawing of the anti-resonance hollow-core optical fiber; the second partial pressure area comprises a plurality of multi-way valves II, each path of first air pressure is divided into a plurality of paths of wire drawing air pressure according to the number of the anti-resonance hollow-core optical fiber wire drawing partial pressure channels, and the plurality of paths of wire drawing air pressure are connected with the end surface of the preform. The device solves the problem that different air areas need to be filled with different air pressures when the anti-resonance hollow-core optical fiber is drawn, and is simple in structure, convenient to assemble, flexible to adjust, high in applicability and capable of rapidly manufacturing the anti-resonance hollow-core optical fiber.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber manufacturing, and in particular to an anti-resonance hollow core optical fiber drawing and pressurizing device. The present invention also relates to an anti-resonance hollow core optical fiber drawing and pressurizing method. Background Art

[0002] The transmission characteristics of light in antiresonant hollow-core fibers are closely related to the design of the microstructure inside the fiber. However, the surface tension of fused silica during the high-temperature drawing process causes the air region inside the antiresonant hollow-core fiber to collapse, so it is necessary to apply air pressure to the air channel inside the antiresonant hollow-core fiber during the drawing process to help keep the microstructure from being distorted, thereby achieving low-loss light transmission.

[0003] The interior of an antiresonant hollow-core optical fiber often has multiple air regions of different sizes, and the air pressure control during the drawing process is more complicated. At the same drawing temperature, different air pressures need to be applied to air regions of different sizes to maintain the shape. Using only one type of air pressure to assist drawing cannot produce a low-loss antiresonant hollow-core optical fiber. In the literature [Research on the Preparation of Long-distance Hollow-core Antiresonant Microstructured Optical Fibers, Laser & Infrared, Vol. 53, No. 4, April 2023], the researchers selectively sealed the end face of the antiresonant hollow-core optical fiber preform and welded a double-layer quartz tube air chamber to achieve regional pressurization of the antiresonant hollow-core optical fiber preform with a single-layer quartz tube cladding microstructure. However, low-loss antiresonant hollow-core optical fibers all have a nested or double-nested quartz tube cladding structure, or have a special end face morphology structure, and the methods reported above are no longer applicable.

[0004] Therefore, there is an urgent need for an anti-resonant hollow-core optical fiber drawing and pressurizing device and pressurizing method, which can solve the drawing and pressurizing problems of all anti-resonant hollow-core optical fibers. Summary of the invention

[0005] The present invention aims to provide an anti-resonance hollow core optical fiber drawing and pressurizing device to overcome the deficiencies in the prior art.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an anti-resonant hollow core optical fiber drawing pressurizing device, comprising a gas storage tank, a first pressure division zone, a voltage-changing zone and a second pressure division zone connected in sequence, wherein the first pressure division zone comprises a multi-way valve 1, which divides the initial air pressure of the gas storage tank into multiple first air pressures; the voltage-changing zone comprises a plurality of voltage-changing valves arranged in parallel, which are used to adjust the pressure values ​​of the multiple first air pressures, corresponding to the different air pressures required for anti-resonant hollow core optical fiber drawing; the second voltage-changing zone comprises a plurality of multi-way valves 2, which divide each first air pressure into multiple drawing air pressures according to the number of anti-resonant hollow core optical fiber drawing pressure division channels, and the multiple drawing air pressures are connected to the end face of the preform. Preferably, the range of the voltage-changing valve is determined by the air pressure required for anti-resonant hollow core optical fiber drawing and the drawing environmental conditions. The drawing environmental conditions include the ambient temperature, etc.

[0007] Furthermore, in the above-mentioned anti-resonant hollow-core optical fiber drawing and pressurizing device, the number of channels of the multi-way valve 1 is determined by the number of air pressure types required for anti-resonant hollow-core optical fiber drawing.

[0008] Furthermore, in the above-mentioned anti-resonant hollow-core optical fiber drawing and pressurizing device, the number of channels of the multi-way valve 1 is 2-8.

[0009] Furthermore, in the above-mentioned anti-resonant hollow-core optical fiber drawing and pressurizing device, the number of the pressure-changing valves is the same as the number of the first air pressure paths, and are arranged in a one-to-one correspondence with the first air pressure.

[0010] Furthermore, in the above-mentioned antiresonant hollow-core optical fiber drawing and pressurizing device, the number of channels of the multi-way valve 2 is determined by the number of drawing air pressure channels corresponding to the end face morphology of the antiresonant hollow-core optical fiber, and when the end face morphology of the antiresonant hollow-core optical fiber is the same as the preform rod structure, the number of drawing air pressure channels corresponding to the end face morphology is equal to the number of air regions of the same area corresponding to the inside of the antiresonant hollow-core optical fiber.

[0011] Furthermore, in the above-mentioned anti-resonant hollow-core optical fiber drawing and pressurizing device, the number of channels of the multi-way valve 2 is 2-8.

[0012] Furthermore, in the above-mentioned antiresonant hollow-core optical fiber drawing and pressurizing device, the gas storage tank, the first pressure-dividing zone, the voltage-changing zone, and the second pressure-dividing zone are connected by air pipes and joints, and the second pressure-dividing zone also includes an air pipe and a joint connected to the end face of the preform rod.

[0013] Furthermore, in the above-mentioned antiresonant hollow-core optical fiber drawing and pressurizing device, the drawing air pressure is inserted into the air channel on the end surface of the preform rod through the air outlet pipe of the second pressure-dividing zone and connected to the preform rod.

[0014] Furthermore, in the above-mentioned antiresonant hollow-core optical fiber drawing and pressurizing device, after the outlet pipe of the second pressure-dividing zone is connected to the end face of the preform rod, the connection between the end face of the preform rod and the outlet pipe is sealed by curing high-temperature glue.

[0015] The present invention also provides an anti-resonant hollow core optical fiber drawing and pressurizing method, comprising the following steps:

[0016] S1, select the outlet pipe of the second partial pressure zone, and insert one end of the outlet pipe into the end face of the preform rod;

[0017] S2, filling the remaining air portion exposed on the end surface of the preform with high temperature glue;

[0018] S3, curing the glue on the end surface of the preform;

[0019] S4. Select a gas storage tank, a multi-way valve 1, a pressure-changing valve and a multi-way valve 2 according to the anti-resonance hollow-core optical fiber structure;

[0020] S5, select multiple sections of gas pipes, and sequentially connect the gas storage tank, the multi-way valve 1 in the first pressure division area, the pressure-changing valve in the pressure-changing area, and the multi-way valve 2 in the second pressure division area;

[0021] S6, installing the other end of the outlet pipe of the second pressure-dividing zone to the outlet of the corresponding multi-way valve 2;

[0022] S7, adjusting the pressure transformer valve according to the air pressure required for anti-resonant hollow core optical fiber drawing, and adjusting and controlling the pressure value of the first air pressure of each path.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention solves the problem that different air areas need to be filled with different air pressures when antiresonant hollow-core optical fibers are drawn, and the present invention has a simple structure, convenient assembly, and flexible adjustment, and can quickly manufacture antiresonant hollow-core optical fibers; it also has the advantage of strong applicability, and is not only suitable for all antiresonant hollow-core optical fibers, but also suitable for other photonic crystal optical fibers that require pressure division drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the anti-resonance hollow core optical fiber drawing and pressurizing device of the present invention;

[0026] Figure 2 It is a schematic diagram of the end face structure of a preform rod of Embodiment 1 of the anti-resonant hollow-core optical fiber drawing and pressurizing device of the present invention;

[0027] Figure 3 2 is a schematic structural diagram of Embodiment 1 of the anti-resonant hollow-core optical fiber drawing and pressurizing device of the present invention;

[0028] Figure 4 Schematic diagram of sealing the end face of a preform rod in Embodiment 1 of the anti-resonant hollow-core optical fiber drawing and pressurizing device of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the end face of a preform rod of Embodiment 2 of the anti-resonant hollow-core optical fiber drawing and pressurizing device of the present invention;

[0030] Figure 6 2 is a schematic diagram of the structure of the anti-resonant hollow-core optical fiber drawing and pressurizing device according to the present invention;

[0031] Figure 7 Schematic diagram of the sealing of the end face of the preform rod of the second embodiment of the anti-resonance hollow core optical fiber drawing and pressurizing device of the present invention;

[0032] Figure 8 It is a flow chart of the anti-resonant hollow core optical fiber drawing and pressurizing method of the present invention;

[0033] In the figure: 1, gas storage tank; 2, first pressure division area; 21, four-way valve; 22, three-way valve; 3, voltage conversion area; 31, voltage conversion valve; 4, second pressure division area; 41, six-way valve; 42, seven-way valve; 5, preform rod; 6, air pipe;

[0034] 51. Central air region; 52. First antiresonance unit; 53. Second antiresonance unit; 54. Antiharmonic cladding tube; 55. Other air regions; 511. Glued area of ​​central air region; 512. Unglueized area of ​​central air region; 521. Glued area of ​​first antiresonance unit; 522. Air tube inserted area of ​​first antiresonance unit; 531. Glued area of ​​second antiresonance unit; 532. Air tube inserted area of ​​second antiresonance unit; 551. Glued area of ​​other air regions; 552. Air tube inserted area of ​​other air regions. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] like Figure 1-4As shown, an anti-resonance hollow core optical fiber drawing pressurizing device comprises a gas storage tank 1, a first pressure division area 2, a pressure changing area 3 and a second pressure division area 4 connected in sequence, wherein the first pressure division area 2 comprises a multi-way valve 1, which divides the initial air pressure of the gas storage tank 1 into multiple first air pressures; the pressure changing area 3 comprises a plurality of pressure changing valves 31 arranged in parallel, which are used to adjust the pressure values ​​of the multiple first air pressures, corresponding to the different air pressures required for anti-resonance hollow core optical fiber drawing; the second pressure division area 4 comprises a plurality of multi-way valves 2, which divide each first air pressure into multiple drawing air pressures according to the number of pressure division channels for anti-resonance hollow core optical fiber drawing, and the multiple drawing air pressures are connected to the end face of the preform 5. The gas storage tank 1, the first pressure division area 2, the pressure changing area 3 and the second pressure division area 4 are connected through an air pipe 6 and a joint, and the second pressure division area 4 is also connected to the end face of the preform 5 through the air pipe 6 and the joint; the drawing air pressure is connected to the inside of the preform 5 through the air outlet pipe of the second pressure division area 4 inserted into the air channel of the end face of the preform 5.

[0038] like Figure 2 As shown in the figure, it is a schematic diagram of the structure of a nested nodeless antiresonant hollow core optical fiber preform, and its end face morphology is the same as that of the preform 5. The nested nodeless antiresonant hollow core optical fiber preform 5 includes a central air region 51, a first antiresonant unit 52, a second antiresonant unit 53, and a cladding tube 54. The antiresonant hollow core optical fiber includes three air regions of different areas. The first air pressure to be filled during the drawing process is determined by the number of air regions of different areas inside the antiresonant hollow core optical fiber. Three different air pressures are required, corresponding to the central air region 51, the first antiresonant unit 52, and the second antiresonant unit 53, respectively. The number of drawing channels of the central air region 51 is one, while the number of drawing channels of the first antiresonant unit 52 and the second antiresonant unit 53 are both five. The pressurizing device of this embodiment can form a nodeless, negative curvature core type antiresonant hollow core optical fiber.

[0039] by Figure 2 For example, the preform structure of Figure 3 As shown, the pressurizing device includes a gas storage tank 1, a four-way valve 21, a pressure-changing valve 31, a six-way valve 41, a preform rod 5, and an air pipe 6, and a four-way valve 21 is arranged in the first pressure-dividing area 2, three pressure-changing valves 31 are arranged in the pressure-changing area 3, and two six-way valves 41 are arranged in the second pressure-dividing area 4.

[0040] Specifically, the number of channels of the multi-way valve one is determined by the number of air pressures required for anti-resonant hollow-core optical fiber drawing, that is, the number of outlet channels of the multi-way valve one (the number of first air pressure paths) is three, which is equal to the number of air regions of different areas inside the anti-resonant hollow-core optical fiber (3 types); accordingly, the number of channels of the multi-way valve one is four, which is a four-way valve 21. The number of pressure-changing valves 31 is the same as the number of first air pressure paths. Three pressure-changing valves 31 are arranged in the pressure-changing area, corresponding one-to-one to the three first air pressure paths; the range of the pressure-changing valve 31 is determined by the air pressure required for anti-resonant hollow-core optical fiber drawing and the drawing environmental conditions, and the drawing environmental conditions include ambient temperature, etc.

[0041] Among them, the number of channels of the multi-way valve two is determined by the number of drawing air pressure channels corresponding to the end face morphology of the antiresonant hollow-core optical fiber, and the number of drawing air pressure channels is equal to the number of air regions of the same area corresponding to the inside of the antiresonant hollow-core optical fiber, that is, the number of outlet channels of the multi-way valve two is the same as the number of drawing channels of air regions of the same area inside the antiresonant hollow-core optical fiber; thus, one first air pressure path is directly connected to the central air region 51 through the pressure-changing valve 31 and the air pipe 6, and the other two first air pressure paths are each divided into five paths through the pressure-changing valve 31 and the six-way valve 41, and connected to the first antiresonance unit 52 and the second antiresonance unit 53.

[0042] like Figure 4 As shown, after the nested anti-resonance hollow-core optical fiber drawing and pressurizing device is connected to the end face of the preform 5, the connection between the end face of the preform 5 and the outlet pipe of the second pressure-dividing area 4 is sealed by curing high-temperature glue, and the sealed end face is divided into multiple areas, including the glue-coated sealing area 511 of the central air area of ​​the preform, the air pipe-inserted area 512 of the central air area of ​​the preform, the glue-coated sealing area 521 of the first anti-resonance unit of the preform, the air pipe-inserted area 522 of the first anti-resonance unit of the preform, the glue-coated sealing area 531 of the second anti-resonance unit of the preform, and the air pipe-inserted area 532 of the second anti-resonance unit of the preform, and each air pipe-inserted area is an uncoated area. Thus, the drawing air pressure of each path at the outlet end of the pressurizing device can enter the preform 5 in the form of inserting the air pipe 6 into the end face of the preform 5, adjusting and controlling the air pressure, and after drawing, a node-free, negative curvature core type anti-resonance hollow-core optical fiber can be obtained.

[0043] Example 2

[0044] like Figure 1 , 5-7, an anti-resonance hollow core optical fiber drawing pressurizing device, comprising a gas storage tank 1, a first pressure division area 2, a variable pressure area 3 and a second pressure division area 4 connected in sequence, wherein the first pressure division area 2 comprises a multi-way valve 1, which divides the initial air pressure of the gas storage tank 1 into multiple first air pressures; the variable pressure area 3 comprises a plurality of pressure variable valves 31 arranged in parallel, which are used to adjust the pressure values ​​of the multiple first air pressures, corresponding to the different air pressures required for anti-resonance hollow core optical fiber drawing; the second pressure division area 4 comprises a plurality of multi-way valves 2, which divide each first air pressure into multiple drawing air pressures according to the number of anti-resonance hollow core optical fiber drawing pressure division channels, and the multiple drawing air pressures are connected to the end face of the preform 5. The gas storage tank 1, the first pressure division area 2, the variable pressure area 3 and the second pressure division area 4 are connected through an air pipe 6 and a joint, and the second pressure division area 4 is also connected to the end face of the preform 5 through an air pipe 6 and a joint; the drawing air pressure is connected to the inside of the preform 5 through the air outlet pipe of the second pressure division area 4 inserted into the air channel of the end face of the preform 5.

[0045] like Figure 5 As shown in the figure, it is a schematic diagram of the structure of a single-tube type anti-resonant hollow-core optical fiber preform with nodes, and its end face morphology is different from that of the preform structure. This single-tube type anti-resonant hollow-core optical fiber preform 5 with nodes includes a sleeve and five inner tubes, and the five inner tubes are inscribed inside the sleeve and are adjacent to each other, and the preform 5 is divided into a central air region 51, a first anti-resonant unit 52, a remaining air region 55, and a cladding tube 54. For this anti-resonant hollow-core optical fiber preform structure, the first air pressure to be filled during the drawing process is determined by the end face morphology, and two different first air pressures are required, one first air pressure corresponding to the central air region 51 and the five remaining air regions 55, and one first air pressure corresponding to the five first anti-resonant units 52. The pressurizing device of this embodiment can form an anti-resonant hollow-core optical fiber with nodes and straight boundaries.

[0046] by Figure 5 For example, the preform structure of Figure 6 As shown, the pressurizing device includes a gas storage tank 1, a three-way valve 22, a pressure-changing valve 31, a six-way valve 41, a seven-way valve 42, a preform rod 5, and an air pipe 6. It is necessary to set a three-way valve 2 in the first pressure-dividing area, two pressure-changing valves 3 in the pressure-changing area, and a six-way valve 41 and a seven-way valve 42 in the second pressure-dividing area.

[0047] Specifically, the number of channels of the multi-way valve one is determined by the number of air pressure types required for antiresonant hollow-core optical fiber drawing. The end face morphology of the antiresonant hollow-core optical fiber determines that the number of air pressure types required for drawing is two, that is, the number of outlet channels of the multi-way valve one (the number of paths of the first air pressure) is two, which is related to the end face morphology of the antiresonant hollow-core optical fiber; accordingly, the number of channels of the multi-way valve one is three, which is a three-way valve 22. The number of pressure-changing valves 31 is the same as the number of paths of the first air pressure. Two pressure-changing valves 31 are arranged in the pressure-changing area 3, corresponding to the two paths of the first air pressure; the range of the pressure-changing valve 31 is determined by the air pressure required for antiresonant hollow-core optical fiber drawing and the drawing environmental conditions, and the drawing environmental conditions include ambient temperature, etc.

[0048] Among them, the number of channels of the multi-way valve 2 is determined by the number of drawing pressure channels corresponding to the end face morphology of the anti-resonant hollow-core optical fiber, and this number of drawing pressure channels is not equal to the number of air regions of the same area corresponding to the inside of the anti-resonant hollow-core optical fiber. Therefore, the initial air pressure from the gas storage tank 1 is divided into two first air pressures through the three-way valve 22, and the two first air pressures are controlled by two pressure-changing valves 31 to obtain two different air pressures required for drawing the anti-resonant hollow-core optical fiber preform. One first air pressure is divided into five by the pressure-changing valve 31 and the six-way valve 41, and connected to the first anti-resonant unit 52, and the other first air pressure is divided into six by the pressure-changing valve and the seven-way valve 42, and connected to the central air region 51 and the five remaining air regions 55.

[0049] like Figure 7 As shown, after the single-tube type node-type anti-resonant hollow-core optical fiber drawing and pressurizing device is connected to the end face of the preform rod, the connection between the end face of the preform rod and the outlet pipe of the second pressure-dividing zone is sealed by curing high-temperature glue, and the sealed end face is divided into multiple areas, including the glue-coated sealing area 511 of the central air area of ​​the preform rod, the air pipe-inserted area 512 of the central air area of ​​the preform rod, the glue-coated sealing area 521 of the first anti-resonant unit of the preform rod, the air pipe-inserted area 522 of the first anti-resonant unit of the preform rod, the glue-coated sealing area 551 of the remaining air area of ​​the preform rod, and the air pipe-inserted area 552 of the remaining air area of ​​the preform rod, and each air pipe-inserted area is an uncoated area. Thus, the drawing air pressure of each path at the outlet end of the pressurizing device can enter the preform rod by inserting the air pipe 6 into the end face of the preform rod 5, and the air pressure is adjusted and controlled, and after drawing, a node-type, straight-boundary anti-resonant hollow-core optical fiber can be obtained.

[0050] like Figure 8 As shown, the present invention also provides an anti-resonant hollow core optical fiber drawing and pressurizing method, comprising the following steps:

[0051] S1, select the gas outlet pipe of the second partial pressure zone 4, and insert one end of the gas outlet pipe into the end surface of the preform rod 5;

[0052] S2, using high temperature glue to fill the remaining air portion exposed on the end surface of the preform rod 5 (the area without the air pipe inserted);

[0053] S3, curing the glue on the end surface of the preform rod 5;

[0054] S4. According to the anti-resonant hollow-core optical fiber structure, a gas storage tank 1, a multi-way valve 1, a pressure-changing valve 31 and a multi-way valve 2 are selected; specifically, for Example 1, a four-way valve 21 is selected for the first pressure-dividing zone 2, three pressure-changing valves 31 are selected for the pressure-changing zone 3, and two six-way valves 41 are selected for the second pressure-dividing zone 4; for Example 2, a three-way valve 22 is selected for the first pressure-dividing zone 2, two pressure-changing valves 31 are selected for the pressure-changing zone 3, a six-way valve 41 is selected for the second pressure-dividing zone 4, and a seven-way valve 42 is selected.

[0055] S5, select multiple sections of gas pipes, and sequentially connect the gas storage tank 1, the multi-way valve 1 of the first pressure division area 2, the pressure-changing valve of the pressure-changing area 3, and the multi-way valve 2 of the second pressure division area 4;

[0056] S6, installing the other end of the outlet pipe of the second pressure-dividing area 4 to the outlet of the corresponding multi-way valve 2;

[0057] S7, adjusting the pressure-changing valve 31 according to the air pressure required for anti-resonance hollow-core optical fiber drawing, and adjusting and controlling the pressure value of the first air pressure of each path.

[0058] In summary, the antiresonant hollow-core optical fiber drawing and pressurizing device and pressurizing method of the present invention solve the problem that air areas of different areas need to be filled with different air pressures when drawing antiresonant hollow-core optical fibers; and the pressurizing device has a simple structure, is easy to assemble, and is flexible to adjust, and is suitable for rapid manufacturing of antiresonant hollow-core optical fibers; in addition, the antiresonant hollow-core optical fiber drawing and pressurizing device of the present invention has strong applicability, and is not only suitable for all antiresonant hollow-core optical fibers, but also suitable for other photonic crystal optical fibers that require partial pressure drawing.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An anti-resonant hollow core optical fiber drawing and pressurizing device, characterized in that: It comprises a gas storage tank, a first pressure-dividing zone, a pressure-changing zone and a second pressure-dividing zone connected in sequence, wherein the first pressure-dividing zone comprises a multi-way valve 1 for dividing the initial gas pressure of the gas storage tank into multiple first gas pressures; the pressure-changing zone comprises a plurality of pressure-changing valves arranged in parallel for adjusting the pressure values ​​of the multiple first gas pressures corresponding to the different gas pressures required for anti-resonant hollow-core optical fiber drawing; the second pressure-dividing zone comprises a plurality of multi-way valves 2 for dividing each first gas pressure into multiple drawing gas pressures according to the number of pressure-dividing channels for anti-resonant hollow-core optical fiber drawing, and the multiple drawing gas pressures are connected to the end face of the preform rod.

2. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 1, characterized in that: The number of channels of the multi-way valve 1 is determined by the number of gas pressures required for anti-resonant hollow-core optical fiber drawing.

3. The anti-resonance hollow core optical fiber drawing and pressurizing device according to claim 2, characterized in that: The number of channels of the multi-way valve 1 is 2-8.

4. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 1, characterized in that: The number of the pressure-changing valves is the same as the number of the first air pressure paths, and are arranged in a one-to-one correspondence with the first air pressure.

5. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 1, characterized in that: The number of channels of the multi-way valve 2 is determined by the number of drawing air pressure channels corresponding to the end face morphology of the antiresonant hollow core optical fiber, and when the end face morphology of the antiresonant hollow core optical fiber is the same as the preform rod structure, the number of drawing air pressure channels corresponding to the end face morphology is equal to the number of air regions of the same area corresponding to the inside of the antiresonant hollow core optical fiber.

6. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 5, characterized in that: The number of channels of the multi-way valve 2 is 2-8.

7. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 1, characterized in that: The gas storage tank, the first pressure-dividing area, the voltage-changing area and the second pressure-dividing area are connected through air pipes and joints, and the second pressure-dividing area also includes an air pipe and a joint connected to the end surface of the preform rod.

8. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 7, characterized in that: The drawing air pressure is inserted into the air channel of the end surface of the preform rod through the air outlet pipe of the second partial pressure zone and connected to the preform rod.

9. The anti-resonant hollow core optical fiber drawing and pressurizing device according to claim 7, characterized in that: After the gas outlet pipe of the second pressure-dividing zone is connected to the end face of the preform rod, the connection between the end face of the preform rod and the gas outlet pipe is sealed by curing high-temperature glue.

10. A method for drawing and pressurizing an anti-resonant hollow core optical fiber, characterized in that: The pressurizing method is applied to the anti-resonant hollow core optical fiber drawing pressurizing device according to any one of claims 1 to 9, comprising the following steps: S1, selecting the gas outlet pipe of the second partial pressure zone, and inserting one end of the gas outlet pipe into the end surface of the preform rod; S2, using high temperature glue to fill the remaining air portion exposed on the end surface of the preform; S3, curing the glue on the end surface of the preform; S4. Select a gas storage tank, a multi-way valve 1, a pressure-changing valve and a multi-way valve 2 according to the anti-resonance hollow-core optical fiber structure; S5, select multiple sections of gas pipes, and sequentially connect the gas storage tank, the multi-way valve 1 in the first pressure division area, the pressure-changing valve in the pressure-changing area, and the multi-way valve 2 in the second pressure division area; S6, installing the other end of the outlet pipe of the second pressure-dividing zone to the outlet of the corresponding multi-way valve 2; S7, adjusting the pressure transformer valve according to the air pressure required for anti-resonant hollow core optical fiber drawing, and adjusting and controlling the pressure value of the first air pressure of each path.

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