Optical fiber stripping assembly, fiber laser, and machining apparatus

Abstract

The application relates to a fiber stripping assembly, a fiber laser and a machining device, wherein the fiber stripping assembly comprises: a first roughened layer arranged on the surface of a first fiber cladding; a second roughened layer arranged on the surface of a fiber stress rod; and a third roughened layer arranged on the surface of a second fiber cladding; the first fiber cladding is located on one side of the fiber stress rod, and the second fiber cladding is located on the other side of the fiber stress rod. The fiber stripping assembly can realize that laser transmission in the fiber cannot be totally reflected and leaks to the outside, realizes that the pump light and the signal light in the fiber cladding and the fiber stress rod leak to the outside, that is, the laser transmission in the fiber cladding and the fiber stress rod is stripped, the deterioration influence of high-beam-quality laser transmission in the fiber core is effectively improved, the output spot mode of the fiber laser is further purified, and higher requirements of the fiber laser are met.

Description

Technical Field

[0001] This application relates to the field of laser technology, and in particular to a fiber stripping assembly, a fiber laser, and processing equipment. Background Technology

[0002] With the continuous advancement of laser technology and the diversification of laser applications, the requirements for lasers are becoming increasingly stringent. High-power fiber lasers generally employ a cladding-pumped structure, which causes the pump laser to propagate within the cladding of large-mode-field fibers. This results in weak laser transmission within the stress bars located in the cladding. Furthermore, due to the long transmission length of high-power fibers, if the signal laser leaks into the cladding during transmission due to fiber bending or mode distortion, it will also propagate within the stress bars, making it difficult to meet the demands of high-speed production. Utility Model Content

[0003] Therefore, it is necessary to provide an optical fiber stripping component, an optical fiber laser, and processing equipment to address the aforementioned technical problems.

[0004] A fiber stripping assembly for use in a fiber laser, the fiber stripping assembly comprising:

[0005] The first texturing layer is disposed on the surface of the first optical fiber cladding;

[0006] The second texturing layer is disposed on the surface of the optical fiber stress bar;

[0007] The third texturing layer is disposed on the surface of the second optical fiber cladding;

[0008] The first fiber cladding is located on one side of the fiber stress bar, and the second fiber cladding is located on the other side of the fiber stress bar.

[0009] In one embodiment, the first texturing layer, the second texturing layer, and the third texturing layer are arranged coaxially along the fiber core.

[0010] In one embodiment, the first texturing layer and the third texturing layer have the same length along the fiber core.

[0011] In one embodiment, the first texturing layer, the second texturing layer, and the third texturing layer all have the same length along the fiber core.

[0012] In one embodiment, a first optical fiber coating layer is disposed on the side of the first texturing layer opposite to the second texturing layer, and a second optical fiber coating layer is disposed on the side of the third texturing layer opposite to the second texturing layer.

[0013] In one embodiment, the sum of the lengths of the first texturing layer, the second texturing layer, and the third texturing layer along the fiber core is equal to the spacing between the first fiber coating layer and the second fiber coating layer.

[0014] In one embodiment, the thickness values ​​of the first texturing layer and the third texturing layer are the same.

[0015] In one embodiment, the thickness values ​​of the first texturing layer, the second texturing layer, and the third texturing layer are all the same.

[0016] A fiber laser, comprising:

[0017] Such as the fiber stripping assembly mentioned above;

[0018] The light source is located on one side of the fiber stripping assembly.

[0019] A processing device, comprising:

[0020] Such as the fiber stripping assembly described above.

[0021] The technical effects of the embodiments provided in this application are as follows:

[0022] The aforementioned fiber stripping assembly, through a first texturing layer disposed on the surface of the first fiber cladding, a second texturing layer disposed on the surface of the fiber stress bar, and a third texturing layer disposed on the surface of the third fiber cladding, forms a pitted and uneven texturing structure. This allows the laser to leak out of the fiber due to non-total internal reflection, thus enabling the pump light and signal light in the fiber cladding and fiber stress bar to leak out. In other words, it strips away the laser transmitted in the fiber cladding and fiber stress bar, effectively improving the degradation effect on the high beam quality laser transmitted to the fiber core, thereby purifying the output beam pattern of the fiber laser and meeting the higher requirements of fiber lasers. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a fiber laser including a fiber stripping assembly in one embodiment. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] Figure 1 This is a schematic diagram of the fiber stripping assembly in one embodiment.

[0030] In this embodiment, as Figure 1 As shown, the fiber stripping assembly is used in a fiber laser. The fiber laser includes, from the inside out, a fiber core 110, a fiber stress bar 120, a first fiber cladding 130a, a second fiber cladding 130b, and a fiber coating layer 140. The fiber stripping assembly includes a first texturing layer 210, a second texturing layer 220, and a third texturing layer 230.

[0031] A first texturing layer 210 is disposed on the surface of the first fiber cladding 130a, a second texturing layer 220 is disposed on the surface of the fiber stress bar 120, and a third texturing layer 230 is disposed on the surface of the second fiber cladding 130b. The first fiber cladding 130a is located on one side of the fiber stress bar 120, and the second fiber cladding 130b is located on the other side of the fiber stress bar 120. The first texturing layer 210, the second texturing layer 220, and the third texturing layer 230 are coaxially arranged along the fiber core 110.

[0032] The first texturing layer 210 may be formed on the surface of the first fiber cladding 130a after texturing treatment, and is capable of removing the texturing structure of pump light and signal light in the first fiber cladding 130a. The second texturing layer 220 may be formed on the surface of the fiber stress bar 120 after texturing treatment, and is capable of removing the texturing structure of pump light and signal light in the fiber stress bar 120. The third texturing layer 230 may be formed on the surface of the second fiber cladding 130b after texturing treatment, and is capable of removing the texturing structure of pump light and signal light in the second fiber cladding 130b.

[0033] It should be noted that, since the first fiber cladding 130a, the fiber stress bar 120, and the second fiber cladding 130b are arranged at different positions along the axial direction of the fiber core 110, and the fiber stress bar 120 is arranged at different heights along the radial direction of the fiber core 110, the texturing process is carried out step by step in layers, which effectively ensures the accuracy of the texturing process.

[0034] The first texturing layer 210 and the third texturing layer 230 have the same length along the fiber core 110. In particular, the lengths of the first texturing layer 210, the second texturing layer 220, and the third texturing layer 230 along the fiber core 110 are all the same. By planning the lengths of the first texturing layer 210, the second texturing layer 220, and the third texturing layer 230 along the axial direction of the fiber core 110, the texturing process of the fiber core 110 can be segmented, thereby further ensuring the smoothness of the transition between different texturing layers.

[0035] A first fiber coating layer 140 is disposed on the side of the first texturing layer 210 opposite to the second texturing layer 220, and a second fiber coating layer 140 is disposed on the side of the third texturing layer 230 opposite to the second texturing layer 220. The sum of the lengths of the first texturing layer 210, the second texturing layer 220, and the third texturing layer 230 along the fiber core 110 is equal to the spacing between the first fiber coating layer 140 and the second fiber coating layer 140. By dividing the multiple texturing layers from the two non-texturing layers, the laser stripping effect transmitted in the first fiber cladding 130a, the second fiber cladding 130b, and the fiber stress bar 120 can be guaranteed while minimizing the time occupied by the texturing process, thereby improving the texturing efficiency and meeting the higher requirements of fiber lasers.

[0036] The thickness values ​​of the first texturing layer 210 and the third texturing layer 230 are the same, especially the thickness values ​​of the first texturing layer 210, the second texturing layer 220, and the third texturing layer 230 are all the same. By planning the thickness values ​​of the first texturing layer 210, the second texturing layer 220, and the third texturing layer 230 along the radial direction of the fiber core 110, the consistency of texturing parameters during the texturing process of the fiber core 110 can be achieved. This ensures the consistency of the texturing effect of different texturing layers while further improving the efficiency of texturing.

[0037] After the fiber laser strips the fiber coating layer 140, the first fiber cladding 130a and the second fiber cladding 130b are exposed. Then, deep etching is performed in the adjacent area down to the fiber stress bar 120 until the panda-shaped fiber stress bar 120 is exposed. The exposed first fiber cladding 130a, second fiber cladding 130b and fiber stress bar 120 are roughened to form a first roughened layer 210, a second roughened layer 220 and a third roughened layer 230, thereby gradually roughening and stripping light from different layers of the fiber until the laser transmitted in the first fiber cladding 130a, second fiber cladding 130b and fiber stress bar 120 is removed.

[0038] This application also provides a fiber laser that includes the fiber stripping assembly described in the above embodiments.

[0039] This application also provides a processing apparatus that includes the fiber stripping assembly described in the above embodiments.

[0040] The division of the various modules in the above-described fiber stripping assembly is for illustrative purposes only. In other embodiments, the fiber stripping assembly can be divided into different modules as needed to complete all or part of the functions of the above-described fiber stripping assembly.

[0041] The fiber stripping assembly, fiber laser, and processing equipment provided in the above embodiments form a pitted and textured structure through a first texturing layer on the surface of the first fiber cladding, a second texturing layer on the surface of the fiber stress bar, and a third texturing layer on the surface of the third fiber cladding. This allows the laser to leak out of the fiber due to non-total internal reflection, thus removing the pump light and signal light transmitted in the fiber cladding and fiber stress bar. This effectively reduces the degradation effect on the high beam quality laser transmitted in the fiber core, thereby purifying the output beam pattern of the fiber laser and meeting the higher requirements of fiber lasers. This has significant economic and practical value.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0043] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fiber stripping assembly, used in a fiber laser, characterized in that, The fiber stripping assembly includes: The first texturing layer is disposed on the surface of the first optical fiber cladding; The second texturing layer is disposed on the surface of the optical fiber stress bar; The third texturing layer is disposed on the surface of the second optical fiber cladding; The first fiber cladding is located on one side of the fiber stress bar, and the second fiber cladding is located on the other side of the fiber stress bar.

2. The fiber stripping assembly according to claim 1, characterized in that, The first texturing layer, the second texturing layer, and the third texturing layer are arranged coaxially along the fiber core.

3. The fiber stripping assembly according to claim 1, characterized in that, The first and third texturing layers have the same length along the fiber core.

4. The fiber stripping assembly according to claim 3, characterized in that, The lengths of the first texturing layer, the second texturing layer, and the third texturing layer along the fiber core are all the same.

5. The fiber stripping assembly according to claim 1, characterized in that, A first optical fiber coating layer is provided on the side of the first texturing layer opposite to the second texturing layer, and a second optical fiber coating layer is provided on the side of the third texturing layer opposite to the second texturing layer.

6. The fiber stripping assembly according to claim 5, characterized in that, The sum of the lengths of the first texturing layer, the second texturing layer, and the third texturing layer along the fiber core is equal to the spacing between the first fiber coating layer and the second fiber coating layer.

7. The fiber stripping assembly according to claim 1, characterized in that, The thickness values ​​of the first texturing layer and the third texturing layer are the same.

8. The fiber stripping assembly according to claim 7, characterized in that, The thickness values ​​of the first texturing layer, the second texturing layer, and the third texturing layer are all the same.

9. A fiber laser, characterized in that, include: The fiber stripping assembly as described in any one of claims 1 to 8; The light source is located on one side of the fiber stripping assembly.

10. A processing device, characterized in that, include: The fiber stripping assembly as described in any one of claims 1 to 8.

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