Hollow optical fiber side hole auxiliary welding method and system for sensitive material filling

Abstract

The invention belongs to the technical field of hollow optical fiber welding, and discloses a hollow optical fiber side hole auxiliary welding method and system for sensitive material filling, which are used for carrying out end surface grinding on a special hollow optical fiber structure with an internal hole, so that an internal hole structure is exposed on the side surface of the optical fiber to form a side hole, thereby being convenient for filling a sensitive material into the special hollow optical fiber structure in the next step. And after the grinding of the perforated optical fiber is completed, welding of leading-in and leading-out optical fibers is carried out on the two ends of the part. And then, injecting a sensitive material into the hollow structure of the optical fiber through the exposed side hole. The problem that bubbles are formed in a traditional sensitive material filling hollow optical fiber welding technology is solved. The operation can be realized only by utilizing an end face grinding machine, and compared with a femtosecond laser punching technology which is high in price and tedious in assembly and operation, the operation is simple, multifunctional utilization of the machine is realized, and the method is economical and friendly. And secondly, the requirement for the fineness of the end face grinding abrasive paper is extremely low, and the requirement for experimental instruments is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of hollow optical fiber fusion splicing, and in particular relates to a hollow optical fiber side hole auxiliary fusion splicing method and system for filling sensitive materials. Background Art

[0002] With the development of science and technology, the research on sensors is also becoming more and more in-depth. As a medium for transmitting optical signals, optical fiber has excellent properties such as anti-electromagnetic, vibration, and corrosion, which has also promoted the research on using optical fiber as an important component of sensors. At present, there are a wide variety of parameters measured by optical fiber sensors, including but not limited to temperature, humidity, magnetic field, refractive index, and pressure. Most of the optical fiber sensor probes are mainly composed of special optical fiber structures and sensing materials that are sensitive to specific parameters. Most of these sensing materials are coated on the outside of the optical fiber structure. This method will cause the sensor to have a lower durability and a series of other problems as the use time increases during operation. For optical fibers with hollow structures inside, such as hollow core fibers, double-hole fibers, side-hole fibers, etc., a specific method can be used to inject sensing materials into the internal structure of the optical fiber. This method improves durability compared to the externally coated structure and reduces the volume of the sensor. However, at present, the filling of hollow optical fibers with sensing materials is mostly only suitable for reflective sensing structures and cannot be completely filled. For transmissive structures, the direct idea of ​​making sensors is to first fill the sensitive material into the inside of the optical fiber and then weld it. Since this method involves fusing the two ends of the optical fiber filled with sensing material, the internal sensing material may be destroyed or evaporated due to high temperature during the fusing process. After fusing, bubbles may form inside the optical fiber, causing incomplete filling, etc., resulting in the optical path not being able to propagate as expected.

[0003] The above-mentioned drawbacks hinder the research and application of such sensors. Therefore, a hollow optical fiber side hole assisted welding method for filling sensitive materials is urgently needed. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a hollow optical fiber side hole auxiliary welding method and system for sensitive material filling, which first grinds the end face of the hollow optical fiber to form a side hole, then welds it with the lead-in and lead-out optical fibers, and finally injects the sensitive material into the internal structure of the hollow optical fiber through the side hole. This method solves the problem of filling the sensing material inside the hollow optical fiber structure and high-quality welding of the transmission optical fiber sensor at a very low cost.

[0005] The present invention is implemented as follows: a hollow optical fiber side hole auxiliary welding method for sensitive material filling comprises the following steps:

[0006] Step 1: polishing the end face of the hollow optical fiber so that the internal air holes are exposed at the sides to form side holes;

[0007] Step 2, fusion splicing the lead-in optical fiber and the lead-out optical fiber at both ends of the polished hollow optical fiber;

[0008] Step three: inject the sensitive material into the hollow structure of the optical fiber through the exposed side hole.

[0009] Furthermore, the step 1 of grinding to form a side hole includes: performing tilted grinding on the end face of the hollow optical fiber, placing it on an end face grinding machine, observing it through a CCD microscope, and setting the tilt angle in the range of 0-90 degrees, so that the cladding is partially removed, exposing the holey structure, and forming a side hole.

[0010] Furthermore, the number of end faces to be ground may be one end face or two end faces.

[0011] Furthermore, in the case of grinding one end face, after the grinding is completed, the appropriate length can be cut and then the two ends are fused to introduce and lead out the optical fiber.

[0012] Furthermore, in the case of grinding two end faces, after the grinding is completed, after cutting an appropriate length, take a section of the lead-out optical fiber and fuse it with the grinded end face, put the fused optical fiber back on the grinding platform, and repeat the grinding operation; after completion, fuse the end face with the lead-in optical fiber.

[0013] Furthermore, the types of holey optical fibers processed can be divided into single-hole optical fibers and multi-hole optical fibers; for single-hole hollow-core optical fibers, the grinding amount of the cross section should be controlled within 60%; for multi-hole (such as double-hole) optical fibers, the grinding amount of each side hole can be controlled within 80%.

[0014] Another object of the present invention is to provide a hollow optical fiber side hole assisted fusion splicing method for filling a sensitive material and a hollow optical fiber side hole assisted fusion splicing system for filling a sensitive material, comprising:

[0015] The side hole polishing module polishes the end face of the hollow optical fiber so that the internal air holes are exposed on the side to form side holes;

[0016] Fiber fusion module, which fuses the incoming fiber and the outgoing fiber at both ends of the polished hollow fiber;

[0017] The sensitive material injection module injects the sensitive material into the hollow structure of the optical fiber through the exposed side holes.

[0018] Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the hollow optical fiber side hole assisted welding method for filling with sensitive materials.

[0019] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to execute the steps of the hollow optical fiber side hole assisted fusion method for sensitive material filling.

[0020] Another object of the present invention is to provide an information data processing terminal, which includes the hollow optical fiber side hole auxiliary fusion splicing system for sensitive material filling.

[0021] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0022] First, the present invention innovatively polishes the end face of the hollow optical fiber, and by controlling the size and angle of the grinding, the internal air holes are exposed on the side to form side holes, and then the optical fibers are introduced and led out by welding at both ends. The above operation facilitates the subsequent filling of sensitive materials into the internal structure of the hollow optical fiber, and solves the problem that it is difficult to inject sensitive materials into the interior of the hollow optical fiber under a transmission structure. At the same time, it solves problems such as bubbles formed in the traditional welding technology of filling hollow optical fibers with sensitive materials. This operation can be achieved using only an end grinder. Compared with the expensive and cumbersome assembly and operation of the femtosecond laser drilling technology, it achieves simple operation, multifunctional utilization of the machine and economic friendliness. Secondly, this method has extremely low requirements on the fineness of the end grinding sandpaper, which greatly reduces the requirements for experimental instruments.

[0023] Second, the technical solution of the present invention overcomes technical prejudice: the purpose of the previous optical fiber end face grinding machine is mainly to grind solid optical fiber, which is mainly used in the field of optical fiber sensing to change the end face angle in the reflection structure, thereby changing the direction of the light reflected from the optical fiber inside the optical fiber at the interface with the air. The present invention has broadened people's vision of the use direction of end face grinding technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of a hollow optical fiber side hole auxiliary welding method for filling sensitive materials provided by an embodiment of the present invention;

[0025] Figure 2 It is a structural diagram of a hollow optical fiber side hole auxiliary fusion splicing system for filling sensitive materials provided by an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of polishing one end of a single-hole hollow-core optical fiber provided by an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of polishing both ends of a single-hole hollow-core optical fiber provided by an embodiment of the present invention;

[0028] Figure 5Schematic diagram of a double-hole optical fiber with a single side hole polished at one end provided by an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of single-side hole grinding at both ends of a double-hole optical fiber provided by an embodiment of the present invention;

[0030] Figure 7 It is a schematic diagram of the fusion splicing of an optical fiber with only a single-end hole polished and an incoming and outgoing optical fiber provided by an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of the fusion splicing of an optical fiber after both ends of the optical fiber are polished and an incoming optical fiber and an outgoing optical fiber provided by an embodiment of the present invention;

[0032] Fig. 9 It is a schematic diagram of the embodiment of the present invention in which both ends are ground and welded and then a liquid sensitive material is injected;

[0033] Fig.10 It is a schematic diagram of a liquid sensitive material entering into some pores after grinding a single end provided by an embodiment of the present invention;

[0034] Fig.11 It is a schematic diagram of a liquid sensitive material entering some pores after both ends are ground according to an embodiment of the present invention.

[0035] Fig.12 This is a spectrum diagram obtained by polishing the end face of a double-hole optical fiber provided in an embodiment of the present invention, filling it with a sensing liquid having thermo-optical and thermal expansion effects and curing it, and then connecting it to a spectrometer.

[0036] Fig.13 It is a cursor map provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a hollow optical fiber side hole auxiliary welding method for sensitive material filling, comprising the following steps:

[0039] Step 1: polishing the end face of the hollow optical fiber so that the internal air holes are exposed at the sides to form side holes;

[0040] Step 2, fusion splicing the lead-in optical fiber and the lead-out optical fiber at both ends of the polished hollow optical fiber;

[0041] Step three: inject the sensitive material into the hollow structure of the optical fiber through the exposed side hole.

[0042] Furthermore, the step 1 of grinding to form the side hole includes: grinding the end face of the hollow optical fiber obliquely, placing it on an end face grinding machine, observing it through a CCD microscope, and setting the inclination angle in the range of 0-90 degrees, so that the cladding is partially removed, exposing the hole structure, and forming the side hole. For porous structures, such as double-hole optical fibers, the angle of the optical fiber should be pre-adjusted under microscope observation in advance to avoid large deviations in grinding, resulting in excessive grinding of the cladding and affecting the mechanical strength of the fusion point.

[0043] Furthermore, the number of end faces to be ground may be one end face or two end faces.

[0044] Furthermore, in the case of grinding one end face, after the grinding is completed, the appropriate length can be cut and then the two ends are fused to introduce and lead out the optical fiber.

[0045] Furthermore, in the case of grinding two end faces, after the grinding is completed, after cutting an appropriate length, take a section of the lead-out optical fiber and fuse it with the grinded end face, put the fused optical fiber back on the grinding platform, and repeat the grinding operation; after completion, fuse the end face with the lead-in optical fiber.

[0046] Furthermore, the types of holey optical fibers processed can be divided into single-hole optical fibers and multi-hole optical fibers; for single-hole hollow-core optical fibers, the grinding amount of the cross section should be controlled within 60%; for multi-hole (such as double-hole) optical fibers, the grinding amount of each side hole can be controlled within 80%.

[0047] The embodiment of the present invention provides a hollow optical fiber side hole assisted fusion method for sensitive material filling, which provides a convenient channel for the injection of sensitive materials by forming a side hole structure on the end face of the hollow optical fiber, while ensuring the mechanical strength of the fusion point and the stability of the optical fiber performance. The whole method includes the key steps of grinding the end face of the optical fiber, fusion-in and lead-out optical fibers, and injecting sensitive materials through the side hole, and each step has innovations and optimized designs in the operation details.

[0048] First, the end face of the hollow optical fiber is ground to form a side hole structure. During this process, the optical fiber end face is tilted and placed on the end face grinder, and its grinding status is observed through a CCD microscope. The tilt angle can be adjusted from 0° to 90° so that the cladding part of the optical fiber is removed appropriately to expose the hollow structure. For multi-hole optical fibers (such as double-hole optical fibers), the angle of the optical fiber needs to be carefully adjusted under a microscope to ensure the grinding accuracy and avoid excessive grinding of the cladding, which may affect the mechanical strength of the subsequent fusion splicing.

[0049] Secondly, after grinding, the two ends of the hollow optical fiber need to be fused together with the incoming optical fiber and the outgoing optical fiber respectively. The mechanical strength and optical performance of the fusion point are crucial to the reliability of the entire device. During operation, the alignment accuracy of the fusion part should be ensured, while avoiding the fusion heat effect near the side hole to damage the structural integrity of the optical fiber. For single-hole optical fiber and multi-hole optical fiber, the fusion parameters need to be adjusted according to the specific side hole position to balance the exposed area of ​​the side hole and the strength of the fusion point.

[0050] For the formation of side holes, the number of polished end faces can be flexibly selected according to needs. If only one end face needs to be polished, cut the appropriate length of hollow optical fiber after polishing, and fuse the two ends to introduce and lead out optical fibers. If two end faces need to be polished, the optical fiber needs to be placed back on the polishing platform after the first end face is polished and fused, and the polishing operation is repeated on the other end face to ensure that the shape and position of the double side holes are accurate.

[0051] Injecting sensitive materials through the side holes is one of the key steps of the method. The side holes formed by grinding directly expose the internal channels of the hollow optical fiber, and the sensitive materials can be injected into the optical fiber through the side holes. In actual operation, the injected material needs to match the internal structure of the optical fiber to avoid uneven material distribution or blockage caused by too fast injection. For single-hole optical fiber, the grinding amount of the side hole should be controlled within 60% to ensure the stability of the cladding and optical fiber structure; for multi-hole optical fiber, the grinding amount of each side hole is controlled within 80% to ensure the balance between the functionality of the side hole and the mechanical strength of the optical fiber.

[0052] Furthermore, in order to ensure the adaptability of different types of optical fibers, the present invention classifies the types of holey optical fibers. The cross-sectional grinding amount of single-hole optical fibers and the side hole grinding amount of multi-hole optical fibers are quantified and specified. The control of grinding accuracy not only affects the filling efficiency of sensitive materials, but also directly determines the mechanical stability of the optical fiber fusion splicing area.

[0053] After the sensitive material is injected, the entire optical fiber device can be tested for performance, including mechanical strength, optical transmission characteristics, and distribution uniformity of sensitive materials. These tests ensure the reliability of the device in different application scenarios, especially in sensitive scenarios such as optical fiber sensing and microfluidic applications. The design of the present invention significantly improves the overall performance of the system.

[0054] In summary, the present invention achieves efficient transformation of hollow optical fibers through precise control of optical fiber end face grinding, optimized design of side hole structure, and organic combination of fusion splicing and material injection processes. This method is of great significance in improving the performance of optical fiber sensors and expanding the scope of optical fiber applications, and provides new technical ideas for the future development of optical fiber technology.

[0055] like Figure 2As shown, an embodiment of the present invention provides a hollow optical fiber side hole assisted fusion method for filling a sensitive material and a hollow optical fiber side hole assisted fusion system for filling a sensitive material, comprising:

[0056] The side hole polishing module polishes the end face of the hollow optical fiber so that the internal air holes are exposed on the side to form side holes;

[0057] Fiber fusion module, which fuses the incoming fiber and the outgoing fiber at both ends of the polished hollow fiber;

[0058] The sensitive material injection module injects the sensitive material into the hollow structure of the optical fiber through the exposed side holes.

[0059] Example

[0060] A hollow optical fiber side hole assisted fusion method for sensitive material filling includes the following steps:

[0061] 1. First, take an appropriate length of optical fiber to be processed and place it on the polishing platform. Adjust the tilt angle between 0° and 90° and then polish it until the internal cavity at the first end face is exposed from the side.

[0062] 2. The number of end faces to be ground can be divided into the case of grinding one end face or grinding two end faces.

[0063] (1) In the case of polishing one end face, after step (1) is completed, the appropriate length can be cut and then the two ends can be fused to introduce and lead out the optical fiber. Since the air hole at the other end of the holey optical fiber is not exposed by processing, it is difficult for the internal air to be completely discharged, so the sensitive material will only partially enter the air hole. Therefore, this situation is suitable for the situation where the sensitive material is expected to partially enter the optical fiber structure.

[0064] (2) For the case of grinding two end faces, after step (1) is completed, cut an appropriate length, take a section of the lead-out optical fiber and fuse it with the polished end face, put the fused optical fiber back on the grinding platform, and repeat step (1). After completion, fuse the end face with the lead-in optical fiber. Since the air hole at the other end of the hole-bearing optical fiber is processed and exposed, the internal air can be completely discharged, and the sensitive material will completely enter the air hole. Therefore, this situation is suitable for the situation where the sensitive material is expected to enter the optical fiber structure.

[0065] 3. The types of holey optical fibers processed can be roughly divided into single-hole optical fibers and multi-hole optical fibers.

[0066] For single-hole hollow-core optical fibers, the amount of cross-section grinding should be controlled within 60% to ensure that there is enough end face area for fusion with the lead-in and lead-out optical fibers, thereby ensuring the mechanical strength of the fusion point. For multi-hole (such as double-hole) optical fibers, where the size of the internal hole is small and the area of ​​the end coating is relatively large, the amount of grinding for each side hole can be controlled within 80%. In this way, while ensuring the mechanical strength, the remaining ungrinded side hole wall can provide an attachment position for sensitive materials, which is conducive to the injection of curable and viscous sensitive materials and the propagation of the optical path.

[0067] 4. For the same hole being ground, there are two situations of liquid in the pore structure:

[0068] (1) When grinding only one end face, the sensitive material will generally only partially enter the hole.

[0069] (2) When both end faces are ground, the sensitive material will generally fill the entire hole. This is also applicable to situations where the liquid to be sensed changes in real time, such as detecting salinity where the refractive index and temperature change in real time.

[0070] 5. Experimental verification shows that this structure can allow most of the light to be transmitted smoothly through the polished holey optical fiber.

[0071] The guide fiber (such as low-cost single-mode fiber) with the coating stripped off is used for taper processing to reduce its diameter and is fixed on a three-dimensional displacement platform. With the help of an electronic CCD microscope, the thin end of the tapered fiber is accurately located and tilted to the exposed side hole. The liquid is slowly pushed through the syringe so that the liquid flows evenly into the exposed hole along the surface of the guide fiber, and then evenly distributed in the hole with the help of capillary effect. The significant advantage of this method is its low cost, which is suitable for scenarios with limited laboratory conditions or the need for economical solutions.

[0072] A hollow-core optical fiber is selected as the guide optical fiber. Its end diameter is reduced through a taper process, and the end of the optical fiber is connected to a syringe, and a sealing process is performed to ensure that the liquid does not leak. The liquid is placed in a syringe, and by connecting a high-precision peristaltic pump, the liquid is controlled to flow evenly through the inner hole of the hollow-core optical fiber and into the exposed side hole area. The placement of the hollow-core optical fiber is also observed with the aid of a microscope, and the three-dimensional displacement platform is used to accurately adjust the side hole position. This method has a high degree of automation, reduces the interference of manual operation, effectively improves the uniformity of liquid distribution, and reduces errors.

[0073] The cost of stripping the coating layer of optical fiber by taper injection is low, the required materials and equipment are simple, and it is especially suitable for occasions with limited budgets. The liquid is distributed by capillary effect, the process is stable and does not require complex mechanical control.

[0074] The hollow-core fiber combined with the peristaltic pump injection method is highly automated and controllable, and the liquid flow process is more uniform and precise, significantly reducing the errors caused by manual operation. The high-precision peristaltic pump ensures precise control of the liquid delivery volume and is suitable for experimental environments that require high-precision liquid distribution.

[0075] like Fig.12 It is a spectrum obtained by polishing the end face of a double-hole optical fiber, filling it with a sensing liquid with thermo-optical and thermal expansion effects, and solidifying it, and then connecting it to a spectrometer.

[0076] Among them, the fiber optic structure of the sensor we demonstrated is: single mode + multimode + dual-hole + multimode + single mode. The two sections of multimode optical fiber are about 500nm, and their function is to expand and contract the light in the single mode. The length of the dual-hole optical fiber is 550nm. After the above structure is polished and fused, we only fill one of the holes with material. Here, we name the upper and lower holes as hole 1 and hole 2 respectively. The PDMS solution selected in this experiment is configured in a ratio of about 1:10. It has good thermo-optical and thermal expansion effects, and the material is transparent, which is conducive to the propagation of light. After filling the PDMS, wait for about five hours for it to solidify naturally. At this time, the length of the PDMS in the hole is about 350nm.

[0077] After completing the above operations, connect the sensor to a light source and observe the spectrum on a spectrometer.

[0078] The spectrum presented by the spectrometer should be mainly formed by two interferences, which we named I1 and I2, respectively, which are formed by the interference of the optical fiber and the two holes 1 and 2. Since the 2nd hole is filled with PDMS, the optical path of the light passing through the 2nd hole will change, resulting in a difference in the FSR (the wavelength distance between two adjacent valleys or peaks in the interference image) of I1 and I2. According to the "vernier effect", when the FSR of the two interfering lights is approximately one or other integer multiples, the presented spectrum will show the effect of inner and outer envelopes.

[0079] The FSR of I1 is

[0080] FSR=λ 2 / [δnL],=λ 2 / [(n core -n air )L]

[0081] Here, λ is the wavelength, δn is the refractive index difference between the core of the double-hole fiber and the air in one hole, and L is the length that the light travels, i.e. the length of the double-hole fiber.

[0082] Similarly, the FSR of I2 is

[0083] FSR=λ 2 / [(n core-n air )L1+(n core -n pdms )L2]

[0084] Where n core The core refractive index of the double-hole optical fiber is 1.467, n air is the refractive index of air in the double-hole fiber, which is 1, L1 is the length of the two holes not filled with PDMS, n pdms is the refractive index of PDMS, which is 1.41, and L2 is the length filled by PDMS.

[0085] By fitting the maximum value in the harmonic spectrum, the inner envelope can be obtained, and the FSR of the inner envelope is expressed as:

[0086] FSR internalenvelope =(i+1)FSR1FSR2 / [FSR1-(i+1)FSR2]

[0087] It is worth noting that the final result of this formula is the absolute value. In this experiment, the two are approximately twice as large, so i is taken as 1.

[0088] After completing the above operations and analysis, it is found that the cursor graph is relatively standard.

[0089] like Fig.13 Through the above experiments, we successfully obtained a relatively standard cursor graph, and therefore concluded that: in the optical fiber sensor made using this method, light can propagate normally in the air holes and holes filled with sensing liquid. This proves that the grinding method proposed in this experiment can be used as a side-hole assisted welding method for hollow optical fibers filled with sensitive materials.

[0090] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A hollow optical fiber side hole assisted welding method for sensitive material filling, characterized in that: The following steps are involved: Step 1: polishing the end face of the hollow optical fiber so that the internal air holes are exposed at the sides to form side holes; Step 2, fusion splicing the lead-in optical fiber and the lead-out optical fiber at both ends of the polished hollow optical fiber; Step three: inject the sensitive material into the hollow structure of the optical fiber through the exposed side hole.

2. The hollow optical fiber side hole assisted welding method for sensitive material filling according to claim 1, characterized in that: The step 1 of grinding to form a side hole includes: grinding the end face of the hollow optical fiber obliquely, placing it on an end face grinding machine, observing it through a CCD microscope, and setting the inclination angle in the range of 0-90 degrees, so that the cladding is partially removed, exposing the holey structure, and forming a side hole.

3. The hollow optical fiber side hole assisted welding method for sensitive material filling according to claim 1, characterized in that: The number of end faces ground is one or two.

4. The hollow optical fiber side hole assisted welding method for sensitive material filling according to claim 3, characterized in that: In the case of grinding one end face, after the grinding is completed, cut the appropriate length and then fusion-splice the two ends to introduce and lead out the optical fiber.

5. The hollow optical fiber side hole assisted fusion method for sensitive material filling according to claim 3, characterized in that: In the case of grinding two end faces, after the grinding is completed, cut an appropriate length, take a section of the lead-out optical fiber and fuse it with the polished end face, put the fused optical fiber back on the grinding platform, and repeat the grinding operation; after completion, fuse the end face with the incoming optical fiber.

6. The hollow optical fiber side hole assisted welding method for sensitive material filling according to claim 1, characterized in that: The types of holey optical fibers processed include single-hole optical fibers and multi-hole optical fibers; for single-hole hollow-core optical fibers, the grinding amount of the cross section is controlled within 60%; for multi-hole optical fibers, the grinding amount of each side hole is controlled within 80%.

7. A hollow optical fiber side hole auxiliary fusion splicing system for sensitive material filling according to any one of claims 1 to 6, characterized in that: include: The side hole polishing module polishes the end face of the hollow optical fiber so that the internal air holes are exposed on the side to form side holes; Fiber fusion module, which fuses the incoming fiber and the outgoing fiber at both ends of the polished hollow fiber; The sensitive material injection module injects the sensitive material into the hollow structure of the optical fiber through the exposed side holes.

8. A computer device, characterized in that: The computer device includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the hollow optical fiber side hole assisted fusion method for sensitive material filling as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to execute the steps of the hollow optical fiber side hole assisted fusion splicing method for sensitive material filling as claimed in any one of claims 1 to 6.

10. An information data processing terminal, characterized in that: The information data processing terminal comprises the hollow optical fiber side hole assisted fusion splicing system for sensitive material filling as claimed in claim 7.

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