High-sensitivity temperature sensor based on liquid metal filling and injection packaging process thereof

Abstract

The application belongs to the technical field of temperature sensors, and particularly relates to a high-sensitivity temperature sensor based on liquid metal filling and an injection packaging process thereof. The sensor comprises a single-mode optical fiber, a first hollow optical fiber and a second hollow optical fiber. One end of the single-mode optical fiber is connected with one end of the first hollow optical fiber, and an indium-gallium-tin alloy is filled between the other end of the first hollow optical fiber and the inner wall of the second hollow optical fiber. The diameter of the single-mode optical fiber is 10 microns. The outer diameter of the single-mode optical fiber is 125 microns, the inner diameter of the first hollow optical fiber is 20 microns, and the outer diameter of the first hollow optical fiber is 125 microns. The inner diameter of the second hollow optical fiber is 135 microns, and the outer diameter of the second hollow optical fiber is 200 microns. One end of the single-mode optical fiber, the first hollow optical fiber and the indium-gallium-tin alloy are located inside one end of the second hollow optical fiber, and UV curing glue is filled between the indium-gallium-tin alloy far from the first hollow optical fiber and the inner wall of the second hollow optical fiber. The application is applied to temperature measurement in a complex environment, and has the advantages of super-high sensitivity, small size and high resolution.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of temperature sensors, and particularly relates to a high-sensitivity temperature sensor based on liquid metal filling and an injection packaging process thereof. BACKGROUND

[0002] The precision of temperature change plays a crucial role in the fields of manufacturing, food processing, pharmaceuticals, etc.; the current traditional temperature measurement method usually involves the use of thermocouples, resistance temperature detectors or infrared radiation temperature measurement; however, it is unavoidable to avoid the influence of electromagnetic radiation, chemical corrosion, etc. in the heat treatment process. Therefore, in many cases, due to the advantages of anti-electromagnetic interference, compact structure, low cost, high sensitivity, etc., the use of optical fiber sensors as the measurement of temperature parameters becomes the best choice. The optical fiber temperature sensor can be divided into: fiber Bragg grating (FBG) type, long period fiber grating (LPFG) type and interferometer type according to the sensing principle. Generally, LPFG and FBG need to use large instruments, such as high-frequency CO2 laser, ultraviolet laser and even femtosecond laser for point-by-point writing. These methods increase the complexity and cost.

[0003] In contrast, the interference-based sensor, especially the Fabry-Perot (F-P) sensor, has become a research hotspot due to its small size, high sensitivity, fast response speed and other advantages. Generally, the F-P interference (FPI) sensor is divided into two categories: intrinsic and extrinsic; for the extrinsic F-P sensor, the Fabry-Perot cavity is composed of the end face of the optical fiber and the external reflection surface, and the air in the middle is the medium; different preparation processes

[0004] In the prior art, an EFPI sensor is prepared by combining an Al2O3 ceramic tube with a single-mode optical fiber (SMF); the proposed sensor can realize high-temperature measurement, and the maximum sensitivity is 0.0113 nm / ℃ between 25℃ and 1000℃; in the prior art, an EFPI is prepared by embedding two sections of SMFs with different reflectivity materials on the end face into a glass capillary tube; the sensitivity of the sensor reaches 0.093 nm / ℃ between 25℃ and 55℃. In the prior art, an EFPI is prepared by using SMF and sapphire-derived fibers to form a cavity; however, the medium of the above-mentioned cavity structure is air with a low thermal expansion coefficient, resulting in low sensitivity; therefore, to improve the sensitivity, it can be tried to introduce a reflective material with a high thermal expansion coefficient; in the prior art, an EFPI is formed by splicing together SMF and cedar oil jet hollow core fiber (HCF); the OPD is used to demodulate the temperature sensitivity of the sensor, which reaches 50.93 μm / ℃ in the range of 25-70℃. However, the 3mm length of cedar oil exceeds the size of the sensor and limits the application range of the sensor.

[0005] Generally, most EFPI sensors for temperature measurement utilize the thermal expansion of the cavity medium, resulting in a change in the optical path difference (OPD); however, the medium in the cavity is usually air with a low thermal expansion coefficient, resulting in low sensitivity, so improving sensitivity can try to introduce a reflective material with a high thermal expansion coefficient; in summary, the sensitivity of the existing optical fiber temperature sensor cannot meet the needs of some high-precision temperature detection fields; therefore, it is necessary to design a compact and sensitive optical fiber sensor. SUMMARY

[0006] The purpose of the present application is to provide a high-sensitivity temperature sensor based on liquid metal filling and its injection packaging process, which is formed by splicing a single-mode optical fiber (SMF) with a hollow optical fiber (HCF) and injecting an indium-gallium-tin alloy into the hollow optical fiber (HCF). The basic principle is that the indium-gallium-tin alloy has good fluidity and thermal conductivity, and during temperature changes, the high thermal expansion coefficient of the indium-gallium-tin alloy causes a dramatic change in the optical path difference, so this sensor has ultra-high temperature sensitivity. At the same time, through structural design, the working temperature of the measuring device of the present application can be 30-40℃, and the sensitivity reaches 11.3nm / ℃. This technology can be applied to temperature measurement in complex environments, and has the advantages of ultra-high sensitivity, small size and high resolution.

[0007] The technical solutions adopted by the present application are as follows:

[0008] The high-sensitivity temperature sensor based on liquid metal filling comprises a single-mode optical fiber, a first hollow optical fiber and a second hollow optical fiber.

[0009] One end of the single-mode optical fiber is connected to one end of the first hollow optical fiber, and the other end of the first hollow optical fiber is provided with an indium-gallium-tin alloy.

[0010] The one end of the single-mode optical fiber, the first hollow optical fiber and the indium-gallium-tin alloy are all located inside one end of the second hollow optical fiber, and the side of the indium-gallium-tin alloy away from the first hollow optical fiber is filled with UV curing glue between the inner wall of the second hollow optical fiber.

[0011] Preferably, the diameter of the single-mode optical fiber is 10μm; the outer diameter of the single-mode optical fiber is 125μm, the inner diameter of the first hollow optical fiber is 20μm, and the outer diameter of the first hollow optical fiber is 125μm; the inner diameter of the second hollow optical fiber is 135μm, and the outer diameter of the second hollow optical fiber is 200μm.

[0012] Preferably, the length of the first hollow optical fiber is 80μm; the length of the second hollow optical fiber is 1000μm.

[0013] The injection packaging process of the high-sensitivity temperature sensor based on liquid metal filling comprises the following steps:

[0014] Step 1: First, the single-mode optical fiber and the first hollow optical fiber are welded;

[0015] Step 2: Take out the welded optical fiber, place the first hollow optical fiber into the optical fiber cutting table, cut off 80 μm of the first hollow optical fiber at the right end of the welding point, and then place it into one of the clamps of the fusion machine;

[0016] Step 3: Cut the second hollow optical fiber flat with an optical fiber cutting knife, burn off the coating with a flame, and then place it into the other clamp of the fusion machine;

[0017] Step 4: Adjust the fusion machine to manual mode, align the x and y axes of the two optical fibers, and insert the first hollow optical fiber into the second hollow optical fiber by 100 μm, then weld 2-3 times, so that the second hollow optical fiber collapses and wraps around the first hollow optical fiber;

[0018] Step 5: Take out the optical fiber and place the second hollow optical fiber into the optical fiber cutting knife, cut 1000 μm, then place it into the optical fiber alignment table, and insert the hollow optical fiber syringe with an indium gallium tin alloy needle into the second hollow optical fiber, inject the indium gallium tin alloy into the second hollow optical fiber by 500 μm at the leftmost end of the welding point;

[0019] Step 6: Insert the hollow optical fiber syringe with a UV curing glue needle into the second hollow optical fiber, inject the UV curing glue into the right end of the indium gallium tin alloy, and use a UV lamp to irradiate the sealed end.

[0020] Preferably, the specific welding steps in step 1 are as follows:

[0021] First, take the single-mode optical fiber, strip off the coating at one end, cut it flat with an optical fiber cutting knife, and place it in one clamp of the fusion machine. Then, take the first hollow optical fiber, burn off the coating with a flame, wipe off the excess coating on the optical fiber with a clean cloth, cut it flat with an optical fiber cutting knife, and place it in the other clamp of the fusion machine and perform electric arc welding.

[0022] Preferably, in step 5, a hollow optical fiber syringe with an indium gallium tin alloy needle needs to be prepared first. Take a hollow optical fiber with a diameter of 100 μm, strip off the coating, and cut both ends flat with a cutting knife. Then, insert one end into the needle end of the syringe, seal the needle port of the syringe with a UV curing glue needle, and then cure the UV curing glue with a UV lamp. Finally, inject the indium gallium tin alloy into the other side of the syringe needle end to complete the packaging.

[0023] Preferably, in step 6, a hollow optical fiber syringe with a UV curing glue needle needs to be prepared first. Take a hollow optical fiber with a diameter of 100 μm, strip off the coating, and cut both ends flat with a cutting knife. Then, insert one end into the needle end of the syringe, seal the needle port of the syringe with a UV curing glue needle, and then cure the UV curing glue with a UV lamp. Finally, inject the UV curing glue into the other side of the syringe needle end to complete the packaging.

[0024] The technical effects achieved by the present application are as follows:

[0025] The high-sensitivity temperature sensor based on liquid metal filling of the present application is formed by splicing a single-mode optical fiber (SMF) and a hollow optical fiber (HCF), and injecting an indium-gallium-tin alloy in the hollow optical fiber (HCF). The basic principle is that the indium-gallium-tin alloy has good fluidity and thermal conductivity, and the high thermal expansion coefficient of the indium-gallium-tin alloy causes a dramatic change in the optical path difference of the double optical paths during temperature change, so that the sensor has ultra-high temperature sensitivity. At the same time, through structural design, the working temperature of the measuring device of the present application can be 30-40℃, and the sensitivity reaches 11.3nm / ℃. The technology can be applied to temperature measurement in complex environments, and has the advantages of ultra-high sensitivity, small size and high resolution.

[0026] The high-sensitivity temperature sensor based on liquid metal filling of the present application comprises a single-mode optical fiber, a first hollow optical fiber and a second hollow optical fiber; one end of the single-mode optical fiber is connected to one end of the first hollow optical fiber, and the other end of the first hollow optical fiber and the inner wall of the second hollow optical fiber are filled with an indium-gallium-tin alloy; the inner diameter of the single-mode optical fiber is 10μm; the outer diameter of the single-mode optical fiber is 125μm, the inner diameter of the first hollow optical fiber is 20μm, and the outer diameter of the first hollow optical fiber is 125μm; the inner diameter of the second hollow optical fiber is 135μm, and the outer diameter of the second hollow optical fiber is 200μm; one end of the single-mode optical fiber, the first hollow optical fiber and the indium-gallium-tin alloy are located inside one end of the second hollow optical fiber, and the side of the indium-gallium-tin alloy away from the first hollow optical fiber is filled with UV curing glue between the inner wall of the second hollow optical fiber; the length of the first hollow optical fiber is 80μm; and the length of the second hollow optical fiber is 1000μm, so that the temperature sensor in the present application has compact structure and high sensitivity. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall transparent structure of the high-sensitivity temperature sensor based on liquid metal filling in Embodiment One of the present application;

[0028] Figure 2 is a schematic diagram of the transparent structure of the hollow optical fiber syringe containing the indium-gallium-tin alloy needle in Embodiment Two of the present application;

[0029] Figure 3 is a schematic diagram of the transparent structure of the hollow optical fiber syringe containing the UV curing glue needle in Embodiment Two of the present application;

[0030] Figure 4 is a schematic diagram of the double-beam interference based on the Fabry-Perot liquid metal in Embodiment Two of the present application.

[0031] In the drawings, the components represented by each reference numeral are listed as follows:

[0032] 1. Single-mode optical fiber; 2. First hollow optical fiber; 3. Second hollow optical fiber; 4. Indium gallium tin alloy; 5. Hollow optical fiber injector with indium gallium tin alloy needle; 6. Hollow optical fiber injector with UV-curable adhesive needle; 7. UV-curable adhesive. Detailed Implementation

[0033] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0034] Example 1:

[0035] like Figure 1 As shown, a high-sensitivity temperature sensor based on liquid metal filling includes a single-mode optical fiber 1, a first hollow optical fiber 2, and a second hollow optical fiber 3.

[0036] One end of the single-mode optical fiber 1 is connected to one end of the first hollow optical fiber 2, and the other end of the first hollow optical fiber 2 is filled with an indium gallium tin alloy 4 between it and the inner wall of the second hollow optical fiber 3.

[0037] The diameter of the single-mode fiber 1 is 10 μm; the outer diameter of the single-mode fiber 1 is 125 μm; the inner diameter of the first hollow fiber 2 is 20 μm; the outer diameter of the first hollow fiber 2 is 125 μm; the inner diameter of the second hollow fiber 3 is 135 μm; and the outer diameter of the second hollow fiber 3 is 200 μm.

[0038] One end of the single-mode fiber 1, the first hollow fiber 2, and the indium gallium tin alloy 4 are all located inside one end of the second hollow fiber 3. The side of the indium gallium tin alloy 4 away from the first hollow fiber 2 is filled with UV-curable adhesive 7 between itself and the inner wall of the second hollow fiber 3.

[0039] The length of the first hollow optical fiber 2 is 80 μm; the length of the second hollow optical fiber 3 is 1000 μm.

[0040] The high-sensitivity temperature sensor based on liquid metal filling disclosed in this embodiment has been experimentally measured to operate at temperatures between 30-40℃, achieving a sensitivity of 11.3 nm / ℃. This technology can be applied to temperature measurement in complex environments, offering advantages such as ultra-high sensitivity, small size, and high resolution.

[0041] Example 2:

[0042] The injection packaging process for a high-sensitivity temperature sensor based on liquid metal filling includes the following steps:

[0043] Step 1: First, take the single-mode optical fiber 1, strip the coating at one end, and cut it flat with an optical fiber cutter, then place it in one clamp of the fusion splicer; then, take the first hollow optical fiber 2, burn off the coating with a fire, wipe off the excess coating on the optical fiber with a clean cloth, cut it flat with an optical fiber cutter, and place it in the other clamp of the fusion splicer and electrically weld it, completing the welding of the single-mode optical fiber 1 and the first hollow optical fiber 2;

[0044] Step 2: Take out the welded optical fiber, place the first hollow optical fiber 2 into the optical fiber cutting table, and cut off 80 μm of the first hollow optical fiber 2 at the right end of the welding point, then place it again in one of the clamps of the fusion splicer;

[0045] Step 3: Cut the second hollow optical fiber 3 flat with an optical fiber cutter, burn off the coating with a fire, and place it in the other clamp of the fusion splicer;

[0046] Step 4: Adjust the fusion splicer to manual mode, align the x and y axes of the two optical fibers, and insert the first hollow optical fiber 2 into the second hollow optical fiber 3 by 100 μm, then weld it 2-3 times, so that the second hollow optical fiber 3 collapses and wraps around the first hollow optical fiber 2;

[0047] Step 5: First, make an indium gallium tin alloy needle-containing hollow optical fiber injector 5, take a hollow optical fiber with a diameter of 100 μm, strip the coating, and cut it flat at both ends with a cutter, then insert one end into the needle end of the injector, seal the needle end of the injector with UV curing glue, and then cure the UV curing glue with a UV lamp; finally, inject indium gallium tin alloy 4 into the other side of the needle end of the injector, complete the packaging; then take out the optical fiber and place the second hollow optical fiber 3 into the optical fiber cutter, cut it to 1000 μm, then place it into the optical fiber alignment table and insert the indium gallium tin alloy needle-containing hollow optical fiber injector 5 into the second hollow optical fiber 3, and inject the indium gallium tin alloy 4 into the second hollow optical fiber 3 at the leftmost end of the welding point by 500 μm;

[0048] Step 6: First, make a UV curing glue needle-containing hollow optical fiber injector 6, take a hollow optical fiber with a diameter of 100 μm, strip the coating, and cut it flat at both ends with a cutter, then insert one end into the needle end of the injector, seal the needle end of the injector with UV curing glue, and then cure the UV curing glue with a UV lamp; finally, inject UV curing glue into the other side of the needle end of the injector, complete the packaging, then insert the UV curing glue needle-containing hollow optical fiber injector 6 into the second hollow optical fiber 3, inject the UV curing glue 7 into the indium gallium tin alloy 4 at the right end, and irradiate the sealed end with a UV lamp.

[0049] The working principle of this invention is as follows: The sensor of this invention is constructed by splicing a single-mode fiber (SMF) and a hollow fiber (HCF) and embedding an indium gallium tin oxide (IGa) alloy into a large-diameter hollow fiber; the two reflective surfaces of the EFPI (Fabry-Perot) are the end faces of the single-mode fiber and the alloy, forming a cavity with air as the medium; the IGa / Indium Tin Oxide alloy is advantageous for temperature measurement due to its liquid state at room temperature and high coefficient of thermal expansion; the proposed EFPI (Fabry-Perot) sensor has ultra-high sensitivity within a small range of 30-40℃; the sensor of this invention has advantages such as extremely high sensitivity, small size, and high resolution, and can be applied in the field of high-precision temperature detection;

[0050] As one aspect of the present invention, it includes a single-mode optical fiber 1, a first hollow optical fiber 2 with an inner diameter of 20 μm and an outer diameter of 125 μm, a second hollow optical fiber 3 with an inner diameter of 135 μm and an outer diameter of 200 μm, and an indium gallium tin alloy 4; on the other hand, an indium gallium tin alloy 4 and a UV-curable adhesive 7 are injected respectively using a hollow optical fiber injector 5 with an indium gallium tin alloy needle and a hollow optical fiber injector 6 with a UV-curable adhesive needle.

[0051] In practical use, such as Figure 4 As shown, the sensor of the present invention has three reflection areas: the reflection area at the welding point of the single-mode fiber 1 and the first hollow fiber 2, the reflection area at the welding point of the first hollow fiber 2 and the indium gallium tin alloy 4, and the reflection area at the welding point of the first hollow fiber 2 and the single-mode fiber 1.

[0052] It should be added that, part of the spectral light transmitted from the core of the single-mode fiber undergoes a first reflection at the welded joint between the single-mode fiber 1 and the first hollow fiber 2. The remaining portion enters the first hollow fiber 2, is completely reflected by the reflective region at the connection point between the other end of the first hollow fiber 2 and the indium gallium tin alloy 4, and remains within the first hollow fiber 2. It is then reflected again to the welded joint between one end of the first hollow fiber 2 and the single-mode fiber 1, undergoing a final reflection. Specifically, as follows... Figure 4 As shown.

[0053] In summary, the spectrum transmitted from the core of a single-mode fiber is reflected into three parts: I1, I2, and I3. Since the reflectivity of the air / SMF interface is much lower than that of the air / LM interface, I3 decays rapidly. Therefore, unlike typical FPI,

[0054] In this structure, the interface between multiple beams is simplified to two beam cross-sections, and the output light intensity can be expressed as:

[0055]

[0056] in, It is the initial phase. The phase change of light as it passes through the cavity can be given by the following formula:

[0057]

[0058] Wherein n represents the refractive index of the medium in the cavity, L is the refractive index of the F-P cavity, and lambda represents the wavelength of the incident light; according to formula (1) and formula (2), the phase difference between the two reflected light beams satisfies the following condition:

[0059]

[0060] Here, is the wavelength of the m-order interference angle; therefore, it can be expressed as:

[0061]

[0062] Formula (4) indicates that the interference angle changes linearly with the cavity length; therefore, in this embodiment, by using the material indium gallium tin alloy (4) with high thermal expansion coefficient and ingeniously designing the temperature and the cavity length L, the sensor of the present application has very high sensitivity to temperature and is in linear relationship; experiments have proved that the sensor is formed by splicing a single-mode optical fiber (SMF) and a hollow optical fiber (HCF), and injecting indium gallium tin alloy in the hollow optical fiber (HCF). The basic principle is that the indium gallium tin alloy has good fluidity and thermal conductivity, and the high thermal expansion coefficient of the indium gallium tin alloy causes the optical path difference to change dramatically during the temperature change, so that the sensor has ultra-high temperature sensitivity. At the same time, through the structural design, the working temperature of the measuring device of the present application can be 30-40℃, and the sensitivity reaches 11.3nm / ℃. The technology can be applied to temperature measurement in complex environment, and has the advantages of ultra-high sensitivity, small size and high resolution.

[0063] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A high sensitivity temperature sensor based on liquid metal filling, characterized in that: Single mode optical fiber (1), first hollow optical fiber (2) and second hollow optical fiber (3); One end of the single mode optical fiber (1) is connected with one end of the first hollow optical fiber (2), and the other end of the first hollow optical fiber (2) is provided with indium gallium tin alloy (4); The single mode optical fiber (1), the first hollow optical fiber (2) and the indium gallium tin alloy (4) are all located inside one end of the second hollow optical fiber (3), and the side of the indium gallium tin alloy (4) away from the first hollow optical fiber (2) is filled with UV curing glue (7) between the inner wall of the second hollow optical fiber (3).

2. The liquid metal filled based high sensitivity temperature sensor according to claim 1, wherein: The diameter of the single mode optical fiber (1) is 10 μm; the outer diameter of the single mode optical fiber (1) is 125 μm, the inner diameter of the first hollow optical fiber (2) is 20 μm, and the outer diameter of the first hollow optical fiber (2) is 125 μm.

3. The liquid metal filled based high sensitivity temperature sensor according to claim 1, wherein: The inner diameter of the second hollow optical fiber (3) is 135 μm, and the outer diameter of the second hollow optical fiber (3) is 200 μm.

4. The liquid metal filled based high sensitivity temperature sensor according to claim 1, wherein: The length of the first hollow optical fiber (2) is 80 μm; the length of the second hollow optical fiber (3) is 1000 μm.

5. Injection encapsulation process of high sensitivity temperature sensor based on liquid metal filling, characterized in that: The injection packaging process is applied to injection packaging of the high-sensitivity temperature sensor of any one of claims 1-4, and the injection packaging process comprises the following steps: Step 1: first, the single mode optical fiber (1) and the first hollow optical fiber (2) are welded and the excess hollow optical fiber (2) is cut off, and the remaining hollow optical fiber (2) is 80 μm; Step 2: the structure obtained in step 1 is placed in the clamp on one side of the optical fiber fusion machine; Step 3: the second hollow optical fiber (3) is cut flat with an optical fiber cutter and then burned with fire, and then placed in the clamp on the other side of the fusion machine; Step 4: the fusion machine is adjusted to manual mode, the x and y axes of the two optical fibers are aligned, and the first hollow optical fiber (2) is inserted into the second hollow optical fiber (3) by 100 μm and welded 2-3 times, so that the second hollow optical fiber (3) collapses and wraps the first hollow optical fiber (2); Step 5: remove the optical fiber and place the second hollow optical fiber (3) into the optical fiber cutter, cut 1000 μm, then place it into the optical fiber alignment table, and insert the hollow optical fiber syringe (5) containing the indium gallium tin alloy needle into the second hollow optical fiber (3), and inject the indium gallium tin alloy (4) into the second hollow optical fiber (3) by 500 μm along the leftmost welding point; Step 6: insert the hollow optical fiber syringe (6) containing the UV curing glue needle into the second hollow optical fiber (3), inject the UV curing glue (7) into the right end of the indium gallium tin alloy (4), and irradiate the sealed end with a ultraviolet lamp.

6. The implant encapsulation process of claim 5, wherein: The specific welding steps in step 1 are as follows: First, take the single mode optical fiber (1), strip the coating at one end, cut it flat with an optical fiber cutter, and then place it in one clamp of the fusion machine; then, take the first hollow optical fiber (2), burn off the coating with fire, wipe off the excess coating on the optical fiber with a clean cloth, cut it flat with an optical fiber cutter, and then place it in the other clamp of the fusion machine and perform electric welding.

7. The implant encapsulation process of claim 6, wherein: In step 5, a hollow optical fiber injector (5) with an indium gallium tin alloy needle is needed. A 100 μm diameter hollow optical fiber is stripped of coating and cut flat at both ends with a cutting knife. One end is inserted into the injector needle end. The needle opening is sealed with UV curing glue, and the UV curing glue is cured with a UV lamp. Finally, indium gallium tin alloy (4) is injected into the other side of the injector needle end to complete the packaging.

8. The implant encapsulation process of claim 7, wherein: In step 6, a hollow optical fiber injector (6) with a UV curing glue needle is needed. A 100 μm diameter hollow optical fiber is stripped of coating and cut flat at both ends with a cutting knife. One end is inserted into the injector needle end. The needle opening is sealed with UV curing glue, and the UV curing glue is cured with a UV lamp. Finally, UV curing glue is injected into the other side of the injector needle end to complete the packaging.

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