Laser etching device

Abstract

The utility model discloses a laser etching device, and relates to the technical field of optical fiber production and manufacturing. The laser etching device comprises a laser generator used for generating a laser beam; the bearing assembly is used for bearing and fixing the optical fiber; the optical assembly is used for dividing the laser beam into a first laser single beam and a second laser single beam and irradiating the first laser single beam and the second laser single beam to the two sides of the optical fiber respectively so as to etch the two sides of the optical fiber; in the embodiment of the invention, the first laser single beam and the second laser single beam symmetrically irradiate the two opposite sides of the optical fiber, so that the two opposite sides of the optical fiber are synchronously etched; specifically, the optical assembly comprises a spectroscope, a first galvanometer, a second galvanometer, a first focus lens and a second focus lens. According to the technical scheme provided by the utility model, the etching efficiency and the etching precision can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber production and manufacturing technical field, especially a kind of laser etching device. BACKGROUND

[0002] With the rapid development of communication network, the application of optical fiber is also more and more widely. In the production and manufacturing process of optical fiber, laser etching device is used as cladding light laser stripper, wherein the main function of cladding light power stripper is to remove the light transmitted in the inner cladding part of optical fiber to ensure good beam quality; it can be understood that, by etching to remove the light transmitted in the cladding part of double-clad optical fiber, it helps to maintain the power and beam quality factor of signal light transmitted in the core, so as to ensure the output beam quality of optical fiber. In the prior art, laser etching device can only etch single beam of optical fiber, which leads to low etching efficiency and low etching precision.

[0003] It should be noted that the above content is only used to assist understanding of the technical scheme of the utility model, and does not mean that the above content is prior art. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of laser etching device, to realize the improvement of etching efficiency and the improvement of etching precision.

[0005] To achieve the above purpose, the utility model provides a kind of laser etching device;

[0006] Specifically, the laser etching device comprises:

[0007] laser generator, for generating laser beam;

[0008] supporting assembly, for supporting and fixing optical fiber;

[0009] optical assembly, for splitting the laser beam into first laser single beam and second laser single beam and irradiating to both sides of the optical fiber respectively, to etch both sides of the optical fiber;

[0010] Specifically, the optical assembly comprises beam splitter, first galvanometer, second galvanometer, first focusing mirror and second focusing mirror;The laser beam is split into the first laser single beam and the second laser single beam by the beam splitter, wherein the first laser single beam passes through the first galvanometer and the first focusing mirror in turn and irradiates to one side of the optical fiber, and the second laser single beam passes through the second galvanometer and the second focusing mirror in turn and irradiates to the other side of the optical fiber;

[0011] The first galvanometer is arranged at a front focal point of the first focusing mirror, so that the first laser beam forms a parallel light structure after passing through the first focusing mirror; and the second galvanometer is arranged at a front focal point of the second focusing mirror, so that the second laser beam forms a parallel light structure after passing through the second focusing mirror.

[0012] In an embodiment, the optical assembly further comprises a beam expander arranged between the laser generator and the beam splitter; the beam expander is used to expand the beam diameter of the laser beam.

[0013] In an embodiment, the optical assembly further comprises a plurality of mirrors, which are used to reflect and guide the laser beam and / or the first laser beam and / or the second laser beam.

[0014] In an embodiment, the first laser beam and the second laser beam symmetrically irradiate to opposite sides of the optical fiber.

[0015] In an embodiment, the bearing assembly comprises a base and a bearing table; the optical fiber is fixedly arranged on the bearing table, and the bearing table is in sliding connection with the base.

[0016] In an embodiment,

[0017] The base is provided with a rotary driving device, a lead screw and a slide rail; one end of the lead screw is connected with the rotary driving device, and the other end of the lead screw is rotationally connected with the base through a bearing seat; the rotary driving device is used to drive the lead screw to rotate; the axial direction of the lead screw is arranged in the same direction as the track direction of the slide rail.

[0018] The bearing table is fixedly provided with a ring member and a sliding block member; the ring member is sleeved on the lead screw and is threadedly connected with the lead screw; and the sliding block member is in sliding connection with the slide rail.

[0019] In an embodiment, the base comprises two sections of the slide rail, and the two sections of the slide rail are symmetrically arranged at opposite sides of the lead screw; the sliding block member is correspondingly arranged with the slide rail.

[0020] In an embodiment, the base comprises a cover plate, and the cover plate is arranged above the lead screw; the bearing table is provided with a through slot for the cover plate to pass through, and a preset gap is formed between the inner side wall of the through slot and the cover plate.

[0021] In an embodiment, the bearing table is provided with a connecting seat and a mounting seat for mounting and fixing one or more optical fibers; the connecting seat is detachably connected with the mounting seat; in particular, the connecting seat comprises a connecting groove for accommodating the mounting seat, and opposite ends of the connecting groove are provided with mounting holes; the mounting seat is provided with threaded holes corresponding to the mounting holes, so that a fixing bolt can pass through the mounting holes and be threadedly connected with the threaded holes.

[0022] In an embodiment, opposite sides of the mounting seat are respectively provided with two mounting members, and the two mounting members are combined to fix opposite sides of the optical fiber, and a region between the two mounting members serves as an etching processing region of the optical fiber.

[0023] The mounting member comprises one or more mounting grooves for accommodating the optical fiber; and the mounting seat further comprises a pressing member for pressing and fixing the optical fiber in the mounting groove.

[0024] In an embodiment,

[0025] When the mounting member comprises one mounting groove, the one mounting groove is arranged at a top position of the mounting member.

[0026] When the mounting member comprises a plurality of mounting grooves, the plurality of mounting grooves are arranged at side positions of the mounting member, and the plurality of mounting grooves are arranged in parallel with each other and in a vertical direction.

[0027] The technical scheme of the utility model divides the laser beam generated by the laser generator into a first laser single beam and a second laser single beam by an optical assembly and irradiates the two sides of the optical fiber respectively, so as to simultaneously perform etching processing on the two sides of the optical fiber; unlike the single-beam optical etching processing in the background art, the double-beam optical etching processing can simultaneously perform etching processing on the two sides of the optical fiber, so as to improve the etching efficiency.

[0028] The optical assembly comprises a beam splitter, a first galvanometer, a second galvanometer, a first focusing lens and a second focusing lens; the laser beam is divided into a first laser single beam and a second laser single beam by the beam splitter, the first laser single beam passes through the first galvanometer and the first focusing lens in sequence and irradiates one side of the optical fiber, and the second laser single beam passes through the second galvanometer and the second focusing lens in sequence and irradiates the other side of the optical fiber; the main function of the galvanometer (the first galvanometer and the second galvanometer) is to accurately adjust and position the laser single beam (the first laser single beam and the second laser single beam) on the optical fiber, so as to ensure that the laser can etch according to the predetermined path, thereby improving the etching precision.

[0029] The first galvanometer is arranged at the front focal point position of the first focusing mirror to form parallel light structure after the first single laser beam passes through the first focusing mirror; and the second galvanometer is arranged at the front focal point position of the second focusing mirror to form parallel light structure after the second single laser beam passes through the second focusing mirror; thereby, the multiple optical fibers can be synchronously etched, and the etching efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0031] Figure 1 Structure diagram of the embodiment of the laser etching device provided by the present application;

[0032] Figure 2 Structure diagram of the focusing mirror in the embodiment of the laser etching device provided by the present application;

[0033] Figure 3 Structure diagram of the bearing assembly in the embodiment of the laser etching device provided by the present application;

[0034] Figure 4 Structure diagram of the base in the embodiment of the laser etching device provided by the present application (the cover plate is hidden);

[0035] Figure 5 Structure diagram of the bearing table in the embodiment of the laser etching device provided by the present application;

[0036] Figure 6 Structure diagram of the connecting seat and the mounting seat in the embodiment of the laser etching device provided by the present application (one of the structure diagrams);

[0037] Figure 7 Structure diagram of the connecting seat and the mounting seat in the embodiment of the laser etching device provided by the present application (the other of the structure diagrams).

[0038] Explanation of the reference signs:

[0039] 100, laser generator;

[0040] 200, bearing assembly; 210, base; 211, rotary driving device; 212, screw rod; 213, sliding rail; 214, bearing seat; 215, cover plate; 220, bearing table; 221, ring piece; 222, sliding block piece; 223, through slot; 230, connecting seat; 231, connecting slot; 232, mounting hole; 240, mounting seat; 241, threaded hole; 242, mounting piece; 243, mounting slot; 244, pressing piece;

[0041] 300, optical assembly; 310, beam splitter; 320, first galvanometer mirror; 330, second galvanometer mirror; 340, first focusing mirror; 350, second focusing mirror; 360, beam expander; 370, reflecting mirror;

[0042] 400, laser beam; 410, first laser single beam; 420, second laser single beam;

[0043] 500, optical fiber;

[0044] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0045] The technical solutions in the utility model will be clearly and completely described below in combination with the drawings in the utility model. Obviously, only some of the embodiments of the utility model are described, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0046] It should be noted that if the directionality indication (such as up, down, left, right, front, back,...) is involved in the embodiments of the utility model, the directionality indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indication also changes accordingly.

[0047] In addition, it should be noted that the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0048] In the prior art, the laser etching device can only etch a single beam of light on the optical fiber, resulting in low etching efficiency and low etching precision.

[0049] To solve the above technical problems, the utility model provides a laser etching device.

[0050] Please refer to Figure 1 In an embodiment of the utility model, the laser etching device comprises:

[0051] The laser generator 100 is used to generate a laser beam 400.

[0052] The bearing assembly 200 is used to bear and fix the optical fiber 500.

[0053] The optical assembly 300 is used to divide the laser beam 400 into a first laser single beam 410 and a second laser single beam 420 and irradiate them to the two sides of the optical fiber 500 respectively to etch the two sides of the optical fiber 500; in this embodiment, the first laser single beam 410 and the second laser single beam 420 are symmetrically irradiated to the opposite sides of the optical fiber 500, thereby synchronously etching the opposite sides of the optical fiber 500.

[0054] Specifically, the optical assembly 300 comprises a beam splitter 310, a first galvanometer 320, a second galvanometer 330, a first focusing lens 340 and a second focusing lens 350; the laser beam 400 is divided into the first laser single beam 410 and the second laser single beam 420 by the beam splitter 310, wherein the first laser single beam 410 sequentially passes through the first galvanometer 320 and the first focusing lens 340 and irradiates to one side of the optical fiber 500, and the second laser single beam 420 sequentially passes through the second galvanometer 330 and the second focusing lens 350 and irradiates to the other side of the optical fiber 500.

[0055] The technical scheme of the utility model divides the laser beam 400 generated by the laser generator 100 into the first laser single beam 410 and the second laser single beam 420 by the optical assembly 300 and irradiates them to the two sides of the optical fiber 500 to etch the two sides of the optical fiber 500 simultaneously; different from the single beam etching in the background art, since the double beams are adopted in the present application, the two sides of the optical fiber 500 can be etched simultaneously, thereby improving the etching efficiency.

[0056] Meanwhile, because existing technologies use single-beam etching, the fiber 500 needs to be rotated during the etching process to ensure that all surfaces are effectively etched. However, this rotation can easily cause the fiber 500 to deviate centrifugally, preventing the laser from precisely etching the designated positions on the fiber 500 and thus reducing etching accuracy. This application, however, uses dual-beam etching, eliminating the need for fiber 500 rotation during the etching process. This avoids centrifugal deviation caused by fiber 500 rotation, thereby improving etching accuracy.

[0057] The optical component 300 includes a beam splitter 310, a first galvanometer 320, a second galvanometer 330, a first focusing lens 340, and a second focusing lens 350. The laser beam 400 is split into a first laser beam 410 and a second laser beam 420 by the beam splitter 310. The first laser beam 410 passes sequentially through the first galvanometer 320 and the first focusing lens 340 before illuminating one side of the optical fiber 500, and the second laser beam 420 passes sequentially through the second galvanometer 330 and the second focusing lens 350 before illuminating the other side of the optical fiber 500. The main function of the galvanometers (first galvanometer 320 and second galvanometer 330) is to precisely adjust and position the laser beams (first laser beam 410 and second laser beam 420) onto the optical fiber 500, ensuring that the laser can etch along a predetermined path, thereby improving etching accuracy.

[0058] Among them, reference appendix Figure 2 The first galvanometer 320 is positioned at the front focal point of the first focusing mirror 340 so that the first laser beam 410 forms a parallel light structure after passing through the first focusing mirror 340; and the second galvanometer 330 is positioned at the front focal point of the second focusing mirror 350 so that the second laser beam 420 forms a parallel light structure after passing through the second focusing mirror 360; thereby enabling simultaneous etching of multiple optical fibers 500 and further improving etching efficiency.

[0059] The laser generator 100 mentioned above uses a CO2 laser, which is a gas laser whose working medium is carbon dioxide gas. Under electrical excitation, carbon dioxide molecules can emit a high-energy laser beam 400 with good directionality and monochromaticity. During laser etching, the laser beam 400 emitted by the CO2 laser can precisely control the etching depth and width. This high-precision etching is particularly suitable for applications requiring precise control of the etching shape.

[0060] Wherein the galvanometer (first galvanometer 320 and second galvanometer 330) is a mirror that can vibrate, which is composed of a reflecting mirror and a rotating motor, and adjusts the direction and position of the single laser beam by constantly rotating. During the laser etching process, on the one hand, the galvanometer can adjust the single laser beam to a high-quality spot, ensuring that the laser can accurately irradiate the workpiece; on the other hand, by controlling the rotation angle of the galvanometer, the path of the single laser beam can be changed so that it etches according to the predetermined path. In summary, the galvanometer plays a crucial role in laser etching, as it not only accurately adjusts and positions the single laser beam, but also changes the path of the single laser beam, thereby ensuring the quality and precision of laser etching. In addition, due to the rotatable function of the galvanometer, the reflection range of the single laser beam is expanded by rotating the galvanometer, thereby increasing the etching range of the laser to achieve the purpose of improving the etching efficiency.

[0061] Wherein the beam splitter 310 can accurately split one laser beam 400 into two or more single laser beams, each single laser beam maintains the original frequency, vibration direction and phase difference, but the light intensity will be weakened. This beam splitting function provides the possibility of multi-path processing for laser etching, making the laser more flexible in acting on the light surface.

[0062] Wherein the focusing mirror (first focusing mirror 340 and second focusing mirror 350) focuses the first single laser beam 410 or the second single laser beam 420 by compressing the angle direction to form a high-energy density spot, and uses the spot to etch the surface of the optical fiber 500; in addition, by the joint action of the focusing mirror and the galvanometer, the galvanometer is set at the front focal point of the focusing mirror, and the optical fiber is set at the back focal point of the focusing mirror, so that the single laser beam forms a parallel light structure after passing through the focusing mirror, thereby being able to etch multiple optical fibers synchronously, which is beneficial to improve the etching efficiency.

[0063] Specifically, the optical assembly 300 further includes an expander 360, which is arranged between the laser generator 100 and the beam splitter 310; the expander 360 is used to expand the beam diameter of the laser beam 400. By setting in this way, since the laser beam 400 has a certain divergence angle when emitted, which will affect the focusing effect and processing precision of the laser; the expander 360 can reduce the divergence angle of the laser beam 400 through its special optical design, making it more parallel and collimated; in this way, during the laser etching process, the laser beam 400 can be more accurately focused on the target area, improving the precision and quality of processing.

[0064] Specifically, the optical component 300 also includes a plurality of reflectors 370, which are used to reflect and guide the laser beam 400 and / or the first laser beam 410 and / or the second laser beam 420. With this configuration, the reflectors 370 reflect the laser beam 400 or the laser beams (the first laser beam 410 and the second laser beam 420) at specific angles and directions through their surfaces. During this process, the reflectors 370 follow the law of reflection that "the angle of incidence equals the angle of reflection," ensuring that the laser beam 400 or the laser beam can be accurately guided to the target position, thereby changing the propagation path of the laser beam 400 or the laser beam.

[0065] The following describes the above embodiments and appendices. Figure 1 The path of the laser beam will be explained in detail:

[0066] The laser beam 400 emitted from the laser generator 100 is a nearly parallel beam, with... Figure 1 The laser beam 400 is represented by a straight line of a certain width. It is directed towards the first reflecting mirror 370, causing it to deflect 90 degrees and be reflected towards the beam expander 360. The beam expander 360 expands the diameter of the laser beam 400, which then travels towards the second reflecting mirror 360, causing it to deflect 45 degrees and be reflected towards the beam splitter 310. The beam splitter 310 splits the laser beam 400 into a first laser beam 410 and a second laser beam 420 of equal power; the first laser beam 410 is transmitted along its original direction, while the second laser beam 420 is deflected 90 degrees and reflected. A first laser beam 410 is directed towards a first galvanometer mirror 320 and then deflected at a certain angle to be directed towards a first focusing mirror 340. The first focusing mirror 340 focuses the first laser beam 410 to form a high-energy-density light spot. A second laser beam 420 is directed towards a second galvanometer mirror 330 and then deflected at a certain angle to be directed towards a second focusing mirror 350. The second focusing mirror 350 focuses the second laser beam 420 to form a high-energy-density light spot.

[0067] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 3 The support component 200 includes a base 210 and a support platform 220; the optical fiber 500 is fixedly mounted on the support platform 220, and the support platform 220 is slidably connected to the base 210. This configuration fixes the optical fiber 500 on the support platform 220, and the position of the optical fiber 500 can be adjusted by sliding between the support platform 220 and the base 210, allowing a single laser beam to etch different positions on the optical fiber 500. The structure is simple and highly practical.

[0068] Specifically, see the attached document. Figure 4The base 210 is provided with a rotary driving device 211, a screw rod 212 and a slide rail 213. One end of the screw rod 212 is connected with the rotary driving device 211, and the other end of the screw rod 212 is rotationally connected with the base 210 through a bearing seat 214. The rotary driving device 211 is used to drive the screw rod 212 to rotate. The axial direction of the screw rod 212 is arranged in the same direction as the track direction of the slide rail 213. The bearing table 220 is fixedly provided with an annular member 221 and a sliding block member 222. The annular member 221 is sleeved on the screw rod 212 and is threadedly connected with the screw rod 212. The sliding block member 222 is slidably connected with the slide rail 213. In this way, the screw rod 212 transmission structure is formed by the combination of the screw rod 212 and the annular member 221. When the rotary driving device 211 drives the screw rod 212 to rotate, the annular member 221 can slide along the axial direction of the screw rod 212, so as to drive the bearing table 220 to slide relative to the base 210. The slide rail 213 and the sliding block member 222 are arranged in a sliding connection mode, so as to limit and guide the sliding direction of the bearing table 220, and ensure that the bearing table 220 can only slide along the axial direction of the screw rod 212 under the driving of the annular member 221.

[0069] Further, the base 210 includes two slide rails 213 which are symmetrically arranged on opposite sides of the screw rod 212. The sliding block member 222 is correspondingly arranged with the slide rail 213. In this way, by symmetrically arranging the slide rails 213 on opposite sides of the screw rod 212, the stability of the bearing table 220 when sliding relative to the base 210 is improved.

[0070] Further, with reference to the accompanying drawings Figures 3-5 The base 210 includes a cover plate 215 which is arranged above the screw rod 212. The bearing table 220 is provided with a through slot 223 for the cover plate 215 to pass through. There is a preset gap between the inner side wall of the through slot 223 and the cover plate 215. In this way, by arranging the cover plate 215, the debris generated by the optical fiber 500 during the laser etching process is prevented from directly falling onto the surface of the screw rod 212 below, so as to avoid hindering the sliding of the screw rod 212 and the annular member 221. That is, the screw rod 212 is shielded and protected by the cover plate 215, so as to facilitate ensuring the smoothness of the sliding of the bearing table 220.

[0071] As a preferred scheme of the above-mentioned embodiment, with reference to the accompanying drawings Figures 5-7The bearing table 220 is provided with a connecting seat 230 and a mounting seat 240 for mounting and fixing a single or multiple optical fibers 500; the connecting seat 230 is detachably connected with the mounting seat 240; in this way, considering that the mounting seat 240 for mounting and fixing a single optical fiber 500 is different in structure from the mounting seat 240 for mounting and fixing multiple optical fibers 500, the connecting seat 230 and the mounting seat 240 are designed to be detachably connected, so that the present application can be compatible with mounting seats 240 of different structures, so that the operating personnel can replace the mounting seat 240 according to the actual situation to fix a single or multiple optical fibers 500.

[0072] Specifically, referring to the accompanying drawings Figures 6-7 The connecting seat 230 comprises a connecting groove 231 for accommodating the mounting seat 240, and opposite ends of the connecting groove 231 are provided with mounting holes 232; the mounting seat 240 is provided with threaded holes 241 corresponding to the mounting holes 232, so that the fixing bolts can pass through the mounting holes 232 and be screwed with the threaded holes 241. In this way, the connecting seat 230 and the mounting seat 240 are connected with each other by using the fixing bolts (not shown in the drawings) to pass through the mounting holes 232 and be screwed with the threaded holes 241; at the same time, since the threaded connection belongs to one of the detachable connection modes, the connecting seat 230 and the mounting seat 240 can be detachably connected, so as to ensure the smooth implementation of the technical scheme of the present application.

[0073] Further, opposite sides of the mounting seat 240 are respectively provided with two mounting members 242, which are combined to fix opposite sides of the optical fiber 500, and the area between the two mounting members 242 serves as an etching processing area of the optical fiber 500; the mounting member 242 comprises a single or multiple mounting grooves 243 for accommodating the optical fiber 500; the mounting seat 240 further comprises a pressing member 244 for pressing and fixing the optical fiber 500 in the mounting groove 243. In this way, the opposite sides of the optical fiber 500 are respectively arranged in the mounting grooves 243 of the two mounting members 242, and the middle area of the optical fiber 500 is suspended to facilitate laser etching processing of the suspended middle area of the optical fiber 500. In this embodiment, the pressing member 244 and the mounting member 242 are fixedly connected in a magnetic connection mode, so that the operating personnel can quickly connect the pressing member 244 and the mounting member 242.

[0074] As shown in the accompanying drawings Figure 6 When the mounting member 242 comprises a single mounting groove 243, the single mounting groove 243 is arranged at the top position of the mounting member 242; in this way, the optical fiber 500 can be smoothly placed in the mounting groove 243 at the top position of the mounting member 242 under the action of its own gravity.

[0075] As shown in the accompanying drawings Figure 7As shown, when the mounting member 242 comprises a plurality of mounting slots 243, the plurality of mounting slots 243 are arranged at the side positions of the mounting member 242, and the plurality of mounting slots 243 are arranged in parallel with each other and arranged in the vertical direction. By arranging in this way, considering that the first laser single beam 410 and the second laser single beam 420 are respectively irradiated to the left and right sides of the optical fiber 500, it is necessary to arrange a plurality of optical fibers 500 in the vertical direction through the mounting slots 243, so that the left and right sides of the optical fiber 500 are not blocked in order to perform laser etching processing.

[0076] It should be noted that other contents of the laser etching device disclosed in the utility model are prior art, which will not be described here.

[0077] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any direct / indirect application of the utility model in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A laser engraving apparatus, characterized by, The laser etching device comprises: a laser generator for generating a laser beam; a bearing assembly for bearing and fixing an optical fiber; an optical assembly for splitting the laser beam into a first laser single beam and a second laser single beam and irradiating the two sides of the optical fiber respectively to perform etching treatment on the two sides of the optical fiber; Specifically, the optical assembly comprises a beam splitter, a first galvanometer, a second galvanometer, a first focusing lens and a second focusing lens; the laser beam is split into the first laser single beam and the second laser single beam by the beam splitter, wherein the first laser single beam passes through the first galvanometer and the first focusing lens in sequence and irradiates one side of the optical fiber, and the second laser single beam passes through the second galvanometer and the second focusing lens in sequence and irradiates the other side of the optical fiber; wherein the first galvanometer is arranged at the front focal point position of the first focusing lens to form parallel light structure after the first laser single beam passes through the first focusing lens; and the second galvanometer is arranged at the front focal point position of the second focusing lens to form parallel light structure after the second laser single beam passes through the second focusing lens.

2. The laser engraving apparatus of claim 1, wherein: The optical assembly further comprises an expander mirror arranged between the laser generator and the beam splitter; the expander mirror is used for expanding the beam diameter of the laser beam.

3. The laser engraving apparatus of claim 1, wherein: The optical assembly further comprises a plurality of reflecting mirrors for reflecting and guiding the laser beam and / or the first laser single beam and / or the second laser single beam.

4. The laser engraving apparatus of claim 1, wherein: The first laser single beam and the second laser single beam are symmetrically irradiated to opposite sides of the optical fiber.

5. The laser engraving apparatus of claim 1, wherein: The bearing assembly comprises a base and a bearing table; the optical fiber is bearingly fixed on the bearing table, and the bearing table is slidingly connected with the base.

6. The laser etching device of claim 5, wherein: the base is provided with a rotary driving device, a lead screw and a slide rail, one end of the lead screw is connected with the rotary driving device, and the other end of the lead screw is rotationally connected with the base through a bearing seat; the rotary driving device is used to drive the lead screw to rotate; the axial direction of the lead screw is arranged in the same direction as the track direction of the slide rail; the bearing table is fixedly provided with a ring member and a sliding block member, the ring member is sleeved on the lead screw and threadedly connected with the lead screw, and the sliding block member is slidingly connected with the slide rail.

7. The laser engraving apparatus of claim 6, wherein: the base comprises two sections of the slide rail, and the two sections of the slide rail are symmetrically arranged on opposite sides of the lead screw; the sliding block member is correspondingly arranged with the slide rail; and / or, the base comprises a cover plate, and the cover plate is arranged above the lead screw; the bearing table is provided with a through slot for the cover plate to pass through, and a predetermined gap is formed between the inner side wall of the through slot and the cover plate.

8. The laser engraving apparatus of claim 6, wherein: The bearing table is provided with a connecting seat and a mounting seat for mounting and fixing one or more optical fibers; the connecting seat is detachably connected with the mounting seat; in particular, the connecting seat comprises a connecting groove for accommodating the mounting seat, and opposite ends of the connecting groove are provided with mounting holes; the mounting seat is provided with threaded holes corresponding to the mounting holes, so that a fixing bolt can pass through the mounting holes and be threadedly connected with the threaded holes.

9. The laser engraving apparatus of claim 8, wherein: Opposite sides of the mounting seat are respectively provided with two mounting members, and the two mounting members are combined to fix opposite sides of the optical fiber, and a region between the two mounting members serves as an etching processing region of the optical fiber. The mounting member comprises one or more mounting grooves for accommodating the optical fiber, and the mounting seat further comprises a pressing member for pressing and fixing the optical fiber in the mounting groove.

10. The laser etching device according to claim 9, wherein: when the mounting member comprises one mounting groove, the one mounting groove is arranged at a top position of the mounting member; and when the mounting member comprises a plurality of mounting grooves, the plurality of mounting grooves are arranged at side positions of the mounting member, and the plurality of mounting grooves are arranged in parallel with each other and in a vertical direction.

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