Mode stripper for high-power fiber laser

Abstract

The utility model belongs to the technical field of optical fiber lasers, and particularly relates to a mode stripper for a high-power optical fiber laser, which comprises a mode stripping optical fiber and a positioning assembly, a protective insertion core is fixedly sleeved on the outer side of the middle of the mode stripping optical fiber, a water cooling shell is arranged on the outer side of the protective insertion core, and a cooling assembly is arranged between the water cooling shell and the protective insertion core. A water injection pipe is fixedly embedded in the upper left portion of the water-cooling shell, a water drainage pipe is fixedly embedded in the lower right portion of the water-cooling shell, plugging connectors are arranged at the left end and the right end of a protection inserting core, and the plugging connectors are connected with the water-cooling shell through positioning assemblies. According to the utility model, the flowing time of cold water in the water flowing cavity can be effectively prolonged, heat can be conveniently and fully absorbed, and the outermost coating layer of the protection insertion core and the conduction spiral are made of copper materials, so that the heat can be better transferred to the flowing cold water, the contact area between the heat and the cold water can be increased, and heat dissipation and cooling are more efficient.

Description

Technical Field

[0001] This utility model belongs to the field of fiber laser technology, and in particular relates to a mode stripper for high-power fiber lasers. Background Technology

[0002] High-power fiber lasers are widely used in metal cutting, welding, industrial manufacturing, 3D printing, aerospace, military equipment, and national defense. In practical applications of high-power fiber lasers, feedback light sometimes inevitably couples back into the cladding from the output end. If the feedback light cannot be effectively removed, it can damage the internal components of the laser. Therefore, a cladding stripper is required.

[0003] Chinese utility model patent CN207588206U discloses a stripper for high-power fiber lasers. By using the synergistic effect of mechanical etching and chemical etching, dual protection of glass tube and protective core, and direct water cooling, the stripper can withstand power of up to kilowatts for removing forward cladding light and reverse feedback light, and can be applied to high-power fiber laser systems.

[0004] However, research on the existing mode strippers revealed that their cooling structures are too simple, resulting in high water flow rates, short heating times, and unsatisfactory cooling performance. Therefore, there is an urgent need to improve the existing mode strippers and provide a mode stripper for high-power fiber lasers. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a mode stripper for high-power fiber lasers that is reasonably designed, simple in structure, and has better cooling performance, thereby solving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A stripper for a high-power fiber laser includes a stripping fiber and a positioning component. A protective ferrule is fixedly sleeved on the outer side of the middle of the stripping fiber. A water-cooled housing is provided on the outer side of the protective ferrule. A cooling component is provided between the water-cooled housing and the protective ferrule. A water injection pipe is embedded and fixed on the upper left side of the water-cooled housing, and a drain pipe is embedded and fixed on the lower right side of the water-cooled housing. Both ends of the protective ferrule are provided with sealing connectors. The sealing connectors are connected to the water-cooled housing through the positioning component. A sealing gasket is bonded and sleeved on the outer side of the sealing connector near the water-cooled housing. Multiple through slots are formed in a ring on the outer edge of the sealing connector opposite to the water-cooled housing.

[0008] In a preferred embodiment, the outermost layer of the protective insert is provided with a covering layer, which is made of copper.

[0009] As a preferred implementation, the cooling assembly comprises a water delivery spiral and a water flow cavity, the water flow cavity is formed between the water cooling shell and the protective plug, and the water delivery spiral is arranged in the water flow cavity.

[0010] As a preferred implementation, the water injection pipe and the water discharge pipe are both connected to the water flow cavity at one end of the water injection pipe, and the water delivery spiral is made of copper.

[0011] As a preferred implementation, the plurality of through grooves are arranged in one-to-one correspondence with the plurality of positioning assemblies, the through groove comprises an arc segment and a circular hole part at the end of the arc segment, and the circular hole part is connected to the arc segment.

[0012] As a preferred implementation, the positioning assembly comprises a fixing column, a nut and a rubber ring, the fixing column is fixedly installed at the left end of the water cooling shell, a threaded segment is arranged at the end of the fixing column away from the water cooling shell, the nut is threadedly connected to the outside of the threaded segment, and the rubber ring is attached to the side of the nut close to the water cooling shell.

[0013] As a preferred implementation, the diameter of the fixing column is equal to the width of the arc segment of the through groove, and the maximum width of the nut is equal to the diameter of the circular hole part of the through groove.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] In the scheme of the utility model,

[0016] When the water injection pipe and the water discharge pipe are connected to the water injection pipe and the water discharge pipe respectively, and water is injected into the water flow cavity, the water can flow along the water delivery spiral in a spiral trajectory, effectively increasing the flow time of the cold water in the water flow cavity, facilitating the absorption of heat, and the outermost cladding layer of the protective plug and the water delivery spiral are both made of copper, which can better transfer heat to the flowing cold water, increase the contact area of heat and cold water, and make the heat dissipation and cooling more efficient.

[0017] The circular hole part of the through groove is aligned with the nut, and then the plugging joint is pushed towards the water cooling shell, when the nut passes through the circular hole part of the through groove, the plugging joint is manually rotated in the counterclockwise direction, the nut is relatively moved to the end of the arc segment of the through groove away from the circular hole part, and then the nut is tightened using a wrench or other tool to press and position the plugging joint, completing the stable installation of the plugging joint, which is simple in structure and convenient to assemble. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and the drawings will be described as follows:

[0019] Figure 1 It is the schematic diagram of the perspective view structure of the utility model;

[0020] Figure 2 It is the schematic diagram of the internal structure of the water-cooled shell of the utility model;

[0021] Figure 3 It is the schematic diagram of the perspective structure of the protective ferrule and the conveying spiral of the utility model;

[0022] Figure 4 It is the schematic diagram of the perspective structure of the plugging joint of the utility model;

[0023] Figure 5 It is the utility model Figure 4 The schematic diagram of the enlarged structure at A in the middle.

[0024] In the drawing,

[0025] 1, stripping optical fiber; 2, water-cooled shell; 3, water injection pipe; 4, drain pipe; 5, protective ferrule; 6, conveying spiral; 7, water flow cavity; 8, plugging joint; 9, through slot; 10, sealing washer; 11, fixed column; 12, nut; 13, rubber ring. DETAILED DESCRIPTION

[0026] The embodiments described below are only a part of the embodiments of the utility model, and do not represent all the embodiments consistent with the utility model. Now, the exemplary embodiments are described as follows in combination with the drawings:

[0027] As Figures 1-5 The utility model stripping device for high-power optical fiber laser as shown in one of them, it includes stripping optical fiber 1 and positioning assembly, the outer side of the middle part of stripping optical fiber 1 is fixedly provided with protective ferrule 5, the outer side of protective ferrule 5 is provided with water-cooled shell 2, cooling assembly is arranged between water-cooled shell 2 and protective ferrule 5, the upper left of water-cooled shell 2 is inlaidly fixed with water injection pipe 3, the lower right of water-cooled shell 2 is inlaidly fixed with drain pipe 4, the left and right ends of protective ferrule 5 are all provided with plugging joint 8, plugging joint 8 is connected with water-cooled shell 2 through positioning assembly, the outer side of the end of plugging joint 8 close to water-cooled shell 2 is adhesively provided with sealing washer 10, the outer edge of the end of plugging joint 8 away from water-cooled shell 2 is annularly provided with a plurality of through slots 9.

[0028] On the basis of the above structure, the outermost layer of protective ferrule 5 is provided with a cladding layer, and the cladding layer is made of copper material.

[0029] In the embodiment, the cladding layer made of copper material is used to facilitate heat dissipation of protective ferrule 5.

[0030] On the basis of the above structure, the cooling assembly comprises a water delivery spiral 6 and a water flow cavity 7, the water flow cavity 7 is formed between the water-cooled shell 2 and the protective plug 5, and the water delivery spiral 6 is arranged in the water flow cavity 7.

[0031] On the basis of the above structure, the water injection pipe 3 and the water drainage pipe 4 are both connected with the water flow cavity 7 at the end close to the water injection pipe 3, and the water delivery spiral 6 is made of copper.

[0032] In the embodiment, water can flow along the water delivery spiral 6 in a spiral track, the flowing time of cold water in the water flow cavity 7 is effectively increased, heat can be fully absorbed, the water delivery spiral 6 can increase the contact area of heat and cold water, and heat dissipation and cooling are more efficient.

[0033] On the basis of the above structure, the plurality of through grooves 9 are arranged in one-to-one correspondence with the plurality of positioning assemblies, the through groove 9 comprises an arc segment and a circular hole part at the end of the arc segment, and the circular hole part is connected with the arc segment.

[0034] On the basis of the above structure, the positioning assembly comprises a fixed column 11, a nut 12 and a rubber ring 13, the fixed column 11 is fixedly installed at the left end of the water-cooled shell 2, a threaded segment is arranged at the end of the fixed column 11 away from the water-cooled shell 2, the nut 12 is threadedly connected outside the threaded segment, and the rubber ring 13 is attached to the side of the nut 12 close to the water-cooled shell 2.

[0035] On the basis of the above structure, the diameter of the fixed column 11 is equal to the width of the arc segment of the through groove 9, and the maximum width of the nut 12 is equal to the diameter of the circular hole part of the through groove 9.

[0036] In the embodiment, the through groove 9 and the positioning assembly arranged in one-to-one correspondence are used to facilitate the installation and positioning of the plugging joint 8, and the structure is simple and convenient to assemble.

[0037] The working principle of the utility model is as follows:

[0038] In use, first, the circular hole part of the through groove 9 provided on the outer edge of the plugging joint 8 is aligned with the nut 12, then the plugging joint 8 is pushed towards the water-cooled shell 2, when the nut 12 passes through the circular hole part of the through groove 9, the plugging joint 8 is manually rotated in the counterclockwise direction, so that the nut 12 is relatively moved to the end of the arc segment of the through groove 9 away from the circular hole part, then a wrench or other tool is used to tighten the nut 12 to press and position the plugging joint 8, and the stable installation of the plugging joint 8 is completed, the structure is simple and convenient to assemble.

[0039] After assembly, the water supply pipe and the backwater pipe are connected with the water injection pipe 3 and the water drainage pipe 4 respectively, then water is injected into the water flow cavity 7 formed between the water-cooled shell 2 and the protective plug 5, the water can flow along the conveying spiral 6 in a spiral trajectory, which can effectively increase the flow time of the cold water in the water flow cavity 7, facilitate the absorption of heat, and the outermost cladding layer of the protective plug 5 and the conveying spiral 6 are both made of copper material, which can better transfer heat to the flowing cold water, and the conveying spiral 6 can also increase the contact area of heat and cold water, so that the heat dissipation and cooling are more efficient.

[0040] The above is only a preferred embodiment of the present application, and is not used to limit the scope of protection of the present application; any equivalent changes, modifications, replacements and variations made by logical analysis, reasoning or limited experiments on the basis of the existing technology according to the concept of the present application should be within the protection scope determined by the claims.

Claims

1. A stripper for high power fiber lasers, comprising a stripped fiber (1) and a positioning assembly, characterized in that: The middle part of the outer side of the stripping fiber (1) is provided with a protective ferrule (5), the outer side of the protective ferrule (5) is provided with a water-cooled shell (2), a cooling assembly is arranged between the water-cooled shell (2) and the protective ferrule (5), the upper left of the water-cooled shell (2) is inlaid and fixed with a water injection pipe (3), the lower right of the water-cooled shell (2) is inlaid and fixed with a drain pipe (4), the left and right ends of the protective ferrule (5) are provided with a plugging joint (8), the plugging joint (8) is connected with the water-cooled shell (2) through a positioning assembly, the outer side of one end of the plugging joint (8) close to the water-cooled shell (2) is adhesively provided with a sealing washer (10), and the outer edge of the other end of the plugging joint (8) away from the water-cooled shell (2) is annularly provided with a plurality of through grooves (9).

2. A high power fiber laser stripper as claimed in claim 1, characterized in that: The outermost layer of the protective ferrule (5) is provided with a cladding layer, and the cladding layer is made of copper.

3. The stripper according to claim 1, wherein: The cooling assembly comprises a conveying spiral (6) and a water flow cavity (7), the water flow cavity (7) is formed between the water-cooled shell (2) and the protective ferrule (5), and the conveying spiral (6) is arranged in the water flow cavity (7).

4. The high power fiber laser stripper of claim 3, wherein: The water injection pipe (3) and the drain pipe (4) are both connected with the water flow cavity (7) at one end close to the water injection pipe (3), and the conveying spiral (6) is made of copper.

5. A high power fiber laser stripper according to claim 4, characterized in that: A plurality of the through grooves (9) are arranged in one-to-one correspondence with a plurality of the positioning assemblies, the through groove (9) comprises an arc segment and a circular hole part at the end of the arc segment, and the circular hole part is in communication with the arc segment.

6. A high power fiber laser stripper according to claim 5, characterized in that: The positioning assembly comprises a fixed column (11), a nut (12) and a rubber ring (13), the fixed column (11) is fixedly installed at the left end of the water-cooled shell (2), one end of the fixed column (11) away from the water-cooled shell (2) is provided with a threaded segment, the threaded segment is externally threadedly sleeved with the nut (12), and the side of the nut (12) close to the water-cooled shell (2) is adhesively provided with the rubber ring (13).

7. A high power fiber laser stripper according to claim 6, characterized in that: The diameter of the fixed column (11) is equal to the width of the arc segment of the through groove (9), and the maximum width of the nut (12) is equal to the diameter of the circular hole part of the through groove (9).

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