Optical fiber strengthening structure, optical fiber laser and manufacturing process of optical fiber laser

Abstract

The invention relates to an optical fiber strengthening structure, an optical fiber laser and an optical fiber laser manufacturing process, the optical fiber strengthening structure comprises a body and a strengthening layer, the strengthening layer surrounds and wraps the peripheral surface of the body, the strengthening layer is made of a waterproof and heat-conducting material, and the strengthening layer is used for being in direct contact with cooling liquid. According to the optical fiber strengthening structure, the strengthening layer is arranged on the peripheral surface of the body to strengthen the surface of the body, so that the optical fiber strengthening structure not only has better safety and flexibility, but also keeps good water-proof and heat-conducting properties. The reinforcing layer is made of a waterproof and heat-conducting material, the reinforcing layer has the heat-conducting property, heat generated by the body can be transmitted to the outside through the reinforcing layer, and the reinforcing layer has the waterproof property and can be in direct contact with cooling liquid to cool the body.

Description

Technical Field

[0001] The present application relates to the field of optical fiber strengthening technology, and in particular to an optical fiber strengthening structure, an optical fiber laser, and an optical fiber laser manufacturing process. Background Art

[0002] Fiber lasers are the third generation of new lasers after traditional gas lasers and solid-state lasers. High-power fiber lasers play an important role in national defense, industrial processing and scientific research. As an important component of high-power fiber laser systems, the stability of optical fibers often greatly affects the safety and stability of the entire system. During the generation of high-power fiber lasers, due to energy dissipation, the heat generated on the optical fiber is very high, and the requirements for optical fiber heat dissipation are very high. Therefore, during the operation process, the cooling of the optical fiber is very important.

[0003] In the related art, a fiber laser includes an optical fiber and a water-cooling plate. The optical fiber is buried in the optical fiber groove of the water-cooling plate or is close to the surface of the water-cooling plate. There is flowing coolant in the water-cooling plate, so that the heat in the optical fiber is taken away by water cooling to dissipate the heat of the optical fiber. However, the installation space of the optical fiber is largely restricted by the area of ​​the water-cooling plate, and more optical fibers cannot be installed in the fiber laser, which leads to low space utilization of the fiber laser and large volume and weight. Summary of the invention

[0004] Based on this, it is necessary to provide a fiber strengthening structure, a fiber laser and a fiber laser manufacturing process to address the problem of surface strengthening of optical fibers.

[0005] The present application provides an optical fiber reinforcement structure, the optical fiber reinforcement structure comprising:

[0006] ontology;

[0007] The strengthening layer surrounds and wraps around the outer peripheral surface of the main body. The strengthening layer is made of a water-insulating and heat-conducting material. The strengthening layer is used to directly contact the coolant.

[0008] In one of the embodiments, the strengthening layer is made of a water-insulating and heat-conductive material with a low refractive index.

[0009] In one embodiment, the optical fiber reinforcement structure includes a plurality of the reinforcement layers stacked together.

[0010] In one embodiment, the thickness of the strengthening layer is in the range of micrometer to sub-millimeter.

[0011] In one embodiment, the body is a bare fiber, and the reinforcement layer is wrapped around the outer peripheral surface of the bare fiber; or,

[0012] The body comprises a bare fiber and a coating layer wrapped around the outer circumference of the bare fiber, and the strengthening layer is wrapped around the outer circumference of the coating layer.

[0013] The present application also provides a fiber laser, comprising a housing and the above-mentioned fiber reinforcement structure, wherein the housing contains a cooling liquid, and the fiber reinforcement structure is immersed in the cooling liquid.

[0014] The present application also provides a fiber laser manufacturing process of the fiber laser described above, comprising:

[0015] S1. coating or spraying a water-insulating and heat-conductive material on the body of the optical fiber reinforcement structure to form a reinforcement layer;

[0016] S2, solidifying the strengthening layer;

[0017] S3, placing the optical fiber reinforcement structure having the reinforcement layer in the cooling liquid in the housing of the optical fiber laser.

[0018] In one of the embodiments, when performing step S1, pigtails of preset length are left at both ends of the body to enable the pigtails to be connected to other components of the fiber laser.

[0019] In one embodiment, before performing step S1, when the main body used is a bare fiber, the bare fiber is straightened before performing step S1.

[0020] In one of the embodiments, in step S3, the optical fiber reinforcement structure is coiled and disposed in the housing, and the bending radius of the optical fiber reinforcement structure during coiling is within a preset range.

[0021] The above-mentioned optical fiber reinforcement structure is provided with a reinforcement layer on the outer peripheral surface of the body to strengthen the surface of the body, so that the optical fiber reinforcement structure has good safety and flexibility, and maintains good water-insulating and heat-conducting properties. The reinforcement layer is made of a water-insulating and heat-conducting material. The reinforcement layer not only has heat-conducting properties, but also the heat generated by the body can be transferred to the outside through the reinforcement layer. Moreover, the reinforcement layer has water-insulating properties and can directly contact with the coolant to cool the body. Compared with the existing structure in which the optical fiber is arranged on a water-cooled plate, the optical fiber reinforcement structure provided in the present application can be directly arranged in the coolant, and the reinforcement layer can directly contact with the coolant without being fixed on the water-cooled plate. The optical fiber reinforcement structure is in direct contact with the coolant, and its arrangement and length are no longer limited by the water-cooled plate, so more optical fiber reinforcement structures can be installed in the optical fiber laser, which improves the space utilization and output efficiency of the optical fiber laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of the optical fiber reinforcement structure provided in an embodiment of the present application from a first perspective.

[0023] Figure 2 A structural schematic diagram of the optical fiber reinforcement structure provided in an embodiment of the present application from a second perspective.

[0024] Figure 3 A flowchart of a fiber laser manufacturing process provided in an embodiment of the present application.

[0025] In the figure:

[0026] 100. Ontology;

[0027] 200. Strengthening layer. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0034] High-power fiber lasers play an important role in national defense, industrial processing, and scientific research. As an important component of high-power fiber laser systems, the stability of optical fibers often greatly affects the safety and stability of the entire system. Therefore, during operation, the cooling of optical fibers is crucial.

[0035] At present, the main cooling method for optical fiber in fiber laser systems is to remove the heat in the optical fiber through water cooling or air cooling. Due to the small specific heat capacity of gas, it is difficult to achieve the expected cooling effect in high-power systems. Therefore, high-power lasers mainly use water cooling to dissipate heat.

[0036] For the current mainstream optical fiber, the water cooling method is generally to coil the optical fiber on a water-conducting cold plate and pass flowing low-temperature coolant into the cold plate. The cold plate used in this way is generally bulky, which brings a greater burden while achieving high power. Secondly, the optical fiber, which is the main source of heat, is soft in texture and fragile on the surface, and is easily scratched or broken. Therefore, when cooling, it is often necessary to bury it in the optical fiber groove of the water-cooling plate or close to the surface of the water-cooling plate for full protection and contact cooling, and the requirements for the operation and operating environment are high. The use space of fiber lasers and optical fibers is largely restricted by the area of ​​the water-cooling plate, and when the experimental conditions and environment need to be changed, movement and adjustment are extremely limited.

[0037] At present, the main method of cooling optical fibers in high-power fiber lasers is to coil the optical fibers on a water-cooled plate and use a water machine to inject a continuous circulating coolant into the water-cooled plate to indirectly cool the optical fibers. The water-cooled plate and the water machine are heavy, and the optical fibers and optical fiber components must be fixed on the water-cooled plate, which has limited space, complicated winding, and limited and complicated operation when the position and system structure need to be adjusted.

[0038] The present application provides a fiber-reinforced structure, such as Figure 1 and Figure 2 As shown, the optical fiber reinforcement structure includes a body 100 and a reinforcement layer 200. The reinforcement layer 200 surrounds and wraps around the outer peripheral surface of the body 100. The reinforcement layer 200 is made of a water-insulating and heat-conductive material, and the reinforcement layer 200 is used to directly contact the coolant.

[0039] The above-mentioned optical fiber reinforcement structure is provided with a reinforcement layer 200 on the outer peripheral surface of the body 100, and the surface of the body 100 is strengthened, so that the optical fiber reinforcement structure has good safety and flexibility, and maintains good water-proof and heat-conducting properties. The reinforcement layer 200 is made of a water-proof and heat-conducting material. The reinforcement layer 200 not only has heat-conducting properties, but also the heat generated by the body 100 can be transferred to the outside through the reinforcement layer 200. Moreover, the reinforcement layer 200 has water-proof properties and can directly contact with the cooling liquid to cool the body 100. Compared with the existing structure in which the optical fiber is arranged on the water-cooled plate, the optical fiber reinforcement structure provided by the present application can be directly arranged in the cooling liquid, and the reinforcement layer 200 can directly contact with the cooling liquid and does not need to be fixed on the water-cooled plate. The optical fiber reinforcement structure is in direct contact with the cooling liquid, and its arrangement mode and length are no longer limited by the water-cooled plate, so more optical fiber reinforcement structures can be installed in the optical fiber laser, thereby improving the space utilization and output efficiency of the optical fiber laser.

[0040] It should be noted that in the embodiment of the present application, the optical fiber reinforcement structure includes a main body 100 and a reinforcement layer 200. The main body 100 refers to a conventional optical fiber structure on the market, and the reinforcement layer 200 is a thermal conductive material sprayed on the outer surface of the main body 100 through a spraying process.

[0041] Compared with the existing optical fiber, the optical fiber reinforcement structure of the present application has an additional reinforcement layer 200, thereby strengthening the surface of the main body 100 and reducing the occurrence of optical fiber fragility and easy breakage. In addition, the reinforcement layer 200 is made of a water-proof and heat-conductive material, which can transfer the heat generated by the main body 100 to the outside without hindering the heat dissipation performance of the main body 100. When the above-mentioned optical fiber reinforcement structure is applied to an optical fiber laser, the optical fiber reinforcement structure can be directly immersed in the coolant without the need to set up a water cooling plate, and the arrangement and length of the optical fiber reinforcement structure are no longer limited by the water cooling plate.

[0042] The optical fiber reinforcement structure provided in the present application is a structure in which one or more layers of low-refractive-index water-insulating and heat-conductive materials are uniformly coated or sprayed on the surface of the main body 100 to form a reinforced protective structure having good thermal conductivity and flexibility as well as a certain strength. The above-mentioned optical fiber reinforcement structure can be used as an important component of the optical fiber laser, which is more flexible and convenient to use, and provides more possibilities for the optimization of the optical fiber laser system.

[0043] In some embodiments, the body 100 is a bare fiber, and the reinforcement layer 200 is wrapped around the outer circumference of the bare fiber. When producing the above optical fiber reinforcement structure, the reinforcement layer 200 can be directly sprayed on the outer circumference of the bare fiber.

[0044] In some embodiments, the body 100 includes a bare fiber and a coating layer wrapped around the outer circumference of the bare fiber, and the strengthening layer 200 is wrapped around the outer circumference of the coating layer. That is, the body 100 is an optical fiber with a coating layer, and the strengthening layer 200 is wrapped around the outer circumference of the coating layer.

[0045] In some embodiments, the body 100 is an active optical fiber or a passive optical fiber.

[0046] In some embodiments, the body 100 is a single-clad optical fiber, a multi-clad optical fiber, or a photonic crystal fiber.

[0047] In summary, the main body 100 of the above-mentioned optical fiber reinforcement structure is used to transmit light beams and / or absorb pumps to generate gain, and has good versatility, and various types of optical fiber structures can be used. For example, active optical fiber or passive optical fiber can be used; single-clad optical fiber or multi-clad optical fiber can be used; complete optical fiber with coating layer can be used, and bare optical fiber with coating layer stripped can be used. It can be understood that the main body 100 of the optical fiber reinforcement structure can be any structure of optical fiber on the market, as long as it can meet the transmission requirements.

[0048] In some embodiments, the strengthening layer 200 is made of a water-insulating and heat-conducting material with a low refractive index. The strengthening layer 200 is made of a water-insulating and heat-conducting material with a low refractive index. The strengthening layer 200 is used to encapsulate and protect the body 100 and help the body 100 to quickly transfer heat to the outer layer. The strengthening layer 200 not only enables the body 100 to maintain good thermal conductivity, good safety and flexibility, but also improves the transmission efficiency of the body 100 to ensure that the light beam meets the transmission conditions in the optical fiber reinforcement structure.

[0049] Specifically, the material selected for the strengthening layer 200 has good thermal conductivity, as well as certain flexibility and strength. The strengthening layer 200 is used to encapsulate and protect the main body 100, and to help the main body 100 quickly conduct heat to the outer layer. The thermal conductive material used needs to be a low refractive index material to ensure that the light beam meets the transmission conditions in the optical fiber strengthening structure.

[0050] In a specific embodiment, the low refractive index ranges from 1.37 to 1.43. When selecting the material of the strengthening layer 200, a material with a refractive index of 1.37 to 1.43 and water-insulating and heat-conducting properties can be selected. The optical fiber strengthening structure covered with the strengthening layer 200 can be more flexibly coiled according to the use requirements and experimental conditions, and to a certain extent avoids the space limitations of the size and position brought by the water cooling plate. At the same time, the outer wrapped strengthening layer 200 also plays a good protective role for the main body 100.

[0051] In some embodiments, the strengthening layer 200 is made of metal material.

[0052] In some embodiments, the strengthening layer 200 is a non-metallic material.

[0053] In some embodiments, the optical fiber reinforcement structure includes a reinforcement layer 200, and the thickness of the reinforcement layer 200 is in the range of micrometer level to sub-millimeter level.

[0054] In some embodiments, the optical fiber reinforcement structure includes a plurality of stacked reinforcement layers 200. The plurality of reinforcement layers 200 further strengthen the surface of the body 100, so that the optical fiber reinforcement structure has better safety and flexibility. The thickness of each reinforcement layer 200 is in the range of micrometer to sub-millimeter.

[0055] It should be noted that when the strengthening layer 200 is multi-layered, the thickness of the single-layer strengthening layer 200 should be minimized to ensure good thermal conductivity and excellent flexibility, to ensure that the coated optical fiber reinforcement structure can retain the coiling ability of the original optical fiber and continue to be used in a coiled state, and the total coiling length can reach tens or hundreds of meters.

[0056] In summary, the fiber reinforcement structure provided by the present application uses the reinforcement layer 200 (low refractive index heat conductive material) to provide an outer surface reinforcement protection structure for the body 100, so that the fiber reinforcement structure not only maintains good thermal conductivity, but also has good safety and flexibility, and can be directly contacted with the coolant for cooling. When it is necessary to cool the optical fiber in the fiber laser, the conventional water cooling plate cooling method can be abandoned, and the above-mentioned fiber reinforcement structure can be directly immersed in the coolant, which is more convenient to use.

[0057] The water-insulating and heat-conductive material with a low refractive index is directly coated or sprayed on the surface of the body 100, which can ensure that the heat of the body 100 is smoothly conducted out. The optical fiber reinforcement structure with the reinforcement layer 200 can be more flexibly coiled according to the use requirements and experimental conditions, and to a certain extent avoids the space limitations of size and position brought by the water cooling plate. At the same time, the outer wrapped reinforcement layer 200 also plays a good protective role for the body 100.

[0058] The present application also provides a fiber laser, including a housing and the above-mentioned fiber reinforcement structure, wherein the housing has a coolant, and the fiber reinforcement structure is immersed in the coolant. The above-mentioned fiber reinforcement structure is directly set in the coolant, and the fiber reinforcement structure is in direct contact with the coolant, that is, the reinforcement layer 200 can be in direct contact with the coolant, and does not need to be fixed on the water cooling plate. The fiber reinforcement structure is in direct contact with the coolant, and its arrangement and length are no longer limited by the water cooling plate, so more fiber reinforcement structures can be installed in the fiber laser, which improves the space utilization and output efficiency of the fiber laser.

[0059] The fiber laser provided in this application, by using the above-mentioned fiber reinforcement structure, abandons the conventional water-cooled plate cooling method, and is directly immersed in the coolant, which is easier to use. The reinforcement layer 200 is directly coated or sprayed on the surface of the main body 100 to ensure that the heat of the inner layer is smoothly conducted out. The fiber reinforcement structure can be coiled more flexibly according to the use requirements and experimental conditions, and to a certain extent avoids the space limitations such as size and position brought by the water-cooled plate. At the same time, the reinforcement layer 200 also plays a good protective role on the main body 100.

[0060] The present application also provides a fiber laser manufacturing process, such as Figure 3 As shown, the fiber laser manufacturing process includes:

[0061] S1. Coating or spraying a water-insulating and heat-conductive material on the main body 100 of the optical fiber reinforcement structure to form a reinforcement layer 200;

[0062] S2, solidifying the strengthening layer 200;

[0063] S3, placing the optical fiber reinforcement structure with the reinforcement layer 200 in the cooling liquid in the housing of the optical fiber laser.

[0064] The fiber laser manufacturing process provided in the present application first coats or sprays a water-proof and heat-conductive material on the main body 100 of the fiber-reinforced structure, thereby forming a reinforcement layer 200 on the outer peripheral surface of the main body 100; when the reinforcement layer 200 is solidified, the fiber-reinforced structure with the reinforcement layer 200 is immersed in a coolant, and the reinforcement layer 200 can directly contact the coolant, which not only isolates the contact between the main body 100 and the coolant, but also transfers the heat generated by the main body 100 to the coolant, thereby achieving cooling of the main body 100.

[0065] In some embodiments, when performing step S1, a pigtail of a preset length is left at both ends of the body 100 to connect the pigtail to other components of the fiber laser. The pigtails are arranged at both ends of the body 100 to facilitate the connection of the fiber reinforcement structure and other devices to achieve signal transmission.

[0066] In some embodiments, before performing step S1, when the main body 100 used is a bare fiber, the bare fiber is straightened before performing step S1. When the main body 100 used is a bare fiber, the main body 100 needs to be kept horizontal and as straight as possible to avoid the bare fiber from breaking due to bending during the coating or spraying process. In addition, the bare fiber should be kept clean, especially before the bare fiber is sprayed, it should be continuously checked and ensured to be clean.

[0067] Specifically, the body 100 is straightened to coat or spray a low-refractive-index water-insulating and heat-conducting material, and the low-refractive-index water-insulating and heat-conducting material needs to be evenly distributed during the operation. It should be noted that when coating or spraying the body, sufficient length of pigtails must be left at both ends to ensure that the system can be connected to other components of the fiber-reinforced structure laser system.

[0068] In some embodiments, when performing step S1, during the spraying process, it should be noted that bubbles should be avoided as much as possible during the operation.

[0069] In some embodiments, in step S3, the fiber reinforcement structure is coiled and arranged in the housing of the fiber laser, and the bending radius of the fiber reinforcement structure is within a preset range when coiling. According to the use requirements, the coated or sprayed fiber reinforcement structure is coiled, and the bending radius needs to be kept within a preset range when coiling to avoid the fiber reinforcement structure from breaking due to excessive bending. Then, the pigtails left at both ends of the fiber reinforcement structure are connected to other components of the fiber laser respectively.

[0070] The present application provides a fiber laser manufacturing process, in which one or more layers of low-refractive-index heat-conducting materials are uniformly coated or sprayed on the outer surface of the body 100, forming a fiber-reinforced structure with a reinforcement layer 200, which does not need to be fixed on a water-cooling plate. The reinforcement layer 200 enhances the use strength of the body 100 to a certain extent, and does not require a water-cooling plate, which reduces the weight of the fiber laser, breaks through the space limitations of the size and position of the original water-cooling plate, and has the characteristics of being more lightweight, flexible, and practical.

[0071] In addition, due to the wide variety of fiber-reinforced structures and thermally conductive materials, technicians may change and replace materials with similar functions on the fiber-reinforced structures exemplified in the above embodiments. These replacement materials, as materials with known functions and technical feasibility, can be naturally used by technicians according to actual engineering needs without changing the essence of the method of the present invention, but their use or not does not deviate from the scope of protection of the method or embodiments of the present invention.

[0072] In summary, the fiber laser manufacturing process provided by the present application uniformly coats or sprays one or more layers of low-refractive-index water-insulating and heat-conducting materials on the outer surface of the body 100, which can ensure that the heat of the body 100 is smoothly conducted out. Thus, an external reinforced protection structure with good thermal conductivity, flexibility, and certain strength is formed. This makes the originally slender, soft, and fragile body 100 have higher strength and good heat dissipation effect while maintaining its own functions, and is more corrosion-resistant and less prone to damage than simple optical fibers, and can be used independently more conveniently and flexibly.

[0073] The fiber reinforcement structure with the reinforcement layer 200 is directly immersed in the cooling liquid of the fiber laser, abandoning the conventional water-cooling plate cooling method of the fiber laser, which is more convenient to use. The fiber reinforcement structure can be more flexibly coiled according to the use requirements and experimental conditions, and to a certain extent avoids the space limitations such as size and position brought by the water-cooling plate. At the same time, the outer wrapped reinforcement layer 200 also plays a good protective role for the body 100.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optical fiber reinforcement structure, characterized in that: The optical fiber reinforcement structure comprises: Ontology(100); The strengthening layer (200) surrounds and wraps around the outer peripheral surface of the main body (100); the strengthening layer (200) is made of a water-insulating and heat-conductive material; and the strengthening layer (200) is used to directly contact with the cooling liquid.

2. The optical fiber reinforcement structure according to claim 1, characterized in that: The strengthening layer (200) is made of a water-insulating and heat-conductive material with a low refractive index.

3. The optical fiber reinforced structure according to claim 1 or 2, characterized in that: The optical fiber reinforcement structure comprises a plurality of reinforcement layers (200) stacked together.

4. The optical fiber reinforcement structure according to claim 1, characterized in that: The thickness of the strengthening layer (200) is in the range of micrometer level to sub-millimeter level.

5. The optical fiber reinforcement structure according to claim 1, characterized in that: The body (100) is a bare fiber, and the strengthening layer (200) is wrapped around the outer peripheral surface of the bare fiber; or, The body (100) comprises a bare fiber and a coating layer wrapped around the outer circumference of the bare fiber, and the strengthening layer (200) is wrapped around the outer circumference of the coating layer.

6. A fiber laser, characterized in that: It comprises a shell and the optical fiber reinforcement structure according to any one of claims 1 to 5, wherein the shell has a cooling liquid inside, and the optical fiber reinforcement structure is immersed in the cooling liquid.

7. A process for manufacturing a fiber laser according to claim 6, characterized in that: include: S1. coating or spraying a water-insulating and heat-conductive material on the body (100) of the optical fiber reinforcement structure to form a reinforcement layer (200); S2, solidifying and shaping the strengthening layer (200); S3, placing the optical fiber reinforcement structure having the reinforcement layer (200) in the cooling liquid in the housing of the optical fiber laser.

8. The fiber laser manufacturing process according to claim 7, characterized in that: When performing step S1, fiber pigtails of a preset length are left at both ends of the body (100) so that the fiber pigtails can be connected to other components of the fiber laser.

9. The fiber laser manufacturing process according to claim 7, characterized in that: Before performing step S1, when the main body (100) used is a bare fiber, the bare fiber is straightened before performing step S1.

10. The fiber laser manufacturing process according to claim 7, characterized in that: In step S3, the optical fiber reinforcement structure is coiled and disposed in the housing, and the bending radius of the optical fiber reinforcement structure is within a preset range during coiling.

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