A dot matrix laser output device and method

Abstract

This invention provides a dot matrix laser output device and method, wherein the device includes: a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module; the fiber laser generates laser light; the homogenizing fiber receives the laser light from the fiber laser and uniformly distributes the power density from the fiber laser; the quartz end cap receives the laser light from the homogenizing fiber and expands and collimates the laser light from the homogenizing fiber; the converging lens array has multiple microlenses arranged in an array structure, which receives the laser light from the quartz end cap and outputs a converged dot matrix laser; the aperture adjusts the overall envelope shape of the converged dot matrix laser output by the converging lens array; the adjustment module receives the converged dot matrix laser light from the aperture and adjusts the spacing between individual light spots or the size of individual light spots in the dot matrix laser.

Description

Technical Field

[0001] This invention relates to the field of fiber lasers, and more specifically, to a dot matrix laser output device and method. Background Technology

[0002] Fiber lasers possess advantages such as high efficiency, compact structure, ease of integration, good beam quality, excellent heat dissipation, and flexible operating modes. They have important applications in industrial manufacturing and processing, optical communication, medical aesthetics, defense, and scientific research, and have successfully replaced traditional solid-state lasers in many fields. As output power requirements increase, high-power fiber lasers exhibit extremely high core power density during laser output, making them prone to damage at the fiber output end face, leading to laser failure. The main solution to this problem is to fuse a large quartz end cap to the fiber output end face to reduce the output power density. To achieve high-precision axial alignment and fusion of the small-diameter fiber and the large-diameter quartz end cap within the same field of view, the diameter of the quartz end cap's input end is often only slightly larger than the fiber diameter, transitioning to the larger diameter output end. Different manufacturers employ different design schemes, resulting in slight variations in the specific shape of the quartz end cap.

[0003] However, in existing technologies, the large-diameter output end face is typically a plane perpendicular to the axis. The light output from a fiber laser, after passing through a quartz end cap, remains an approximately Gaussian divergent beam, with the divergence angle being the same as that of the direct output from the bare fiber. Many specialized applications require convergent or collimated array laser distributions, where the energy distribution between each point is uniform, such as industrial laser perforation and localized laser cosmetic procedures. Summary of the Invention

[0004] This invention provides a novel dot matrix laser output device and method, which not only outputs dot matrix lasers but also allows adjustment of the size and spacing of individual spotlights within the dot matrix laser.

[0005] In a first aspect, the present invention provides a dot matrix laser output device, comprising: a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module; wherein:

[0006] The fiber laser generates laser light;

[0007] The homogenizing fiber is connected to the fiber laser, receives laser light from the fiber laser, and uniformly distributes the power density from the fiber laser.

[0008] The quartz end cap connects to the homogenizing fiber, receives laser light from the homogenizing fiber, and expands and collimates the laser light from the homogenizing fiber.

[0009] The converging lens array has multiple microlenses arranged in an array structure, which receive laser light from the quartz end cap and output converged array laser light.

[0010] The aperture adjusts the overall envelope shape of the converged lattice laser output by the converging lens array;

[0011] The adjustment module receives the converged array laser from the aperture and adjusts the spacing between individual laser spots or the size of individual laser spots.

[0012] In an embodiment of the present invention, wherein:

[0013] The converging lens array has a planar structure on one side and is composed of several microlens units arranged closely on the other side.

[0014] The converging lens array contains microlens units that receive laser light from the quartz end cap and split it into multiple small laser beams, and then converge each small laser beam to form a dot matrix laser.

[0015] The converging lens array outputs a dot matrix laser in a plane, with the convergence point of the dot matrix laser located behind the plane of the converging lens array.

[0016] In an embodiment of the present invention, the adjustment module is a convex lens.

[0017] In an embodiment of the present invention, the convex lens adjusts the spacing between the individual light spots in the dot matrix laser by moving along the optical axis.

[0018] In another embodiment of the present invention, the adjustment module is a collimating lens array.

[0019] In another embodiment of the present invention, the focal length of the microlens in the collimating lens array is smaller than the focal length of the microlens in the converging lens array.

[0020] The collimating lens array transforms the converged fractional laser into a collimated fractional laser.

[0021] In another embodiment of the present invention, the focal length of the microlens unit in the collimating lens array is proportional to the size of the single-point spot in the dot matrix laser.

[0022] In another embodiment of the present invention, the adjustment module is a lens assembly;

[0023] The lens assembly includes concave lenses and convex lenses;

[0024] The convex lens receives the converging array laser output from the aperture;

[0025] The concave lens receives the converging laser output from the convex lens.

[0026] In another embodiment of the invention, the concave lens is placed between the convex lens and the imaging point of the convex lens.

[0027] In another embodiment of the invention, the lens assembly adjusts the spacing between individual light spots in the dot matrix laser by moving the convex lens or the concave lens along the optical axis.

[0028] The lens assembly adjusts the size of a single spot in the dot matrix laser by moving the concave lens along the optical axis.

[0029] The concave lens converts the converged fractional laser into a collimated fractional laser.

[0030] In another embodiment of the invention, wherein:

[0031] When the convex lens is close to the aperture, the spacing between the single-point laser spots increases;

[0032] When the convex lens moves away from the aperture, the spacing between the single-point laser spots becomes smaller;

[0033] In another embodiment of the invention, wherein:

[0034] When the concave lens moves away from the convex lens, the single-point spot of the dot matrix laser becomes larger;

[0035] When the concave lens is brought close to the convex lens, the single-point spot of the dot matrix laser becomes smaller.

[0036] Secondly, the present invention also provides a method for scatter laser output, the method comprising: sequentially connecting a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module together; wherein

[0037] The fiber laser generates laser light;

[0038] The homogenizing fiber is connected to the fiber laser, receives laser light from the fiber laser, and uniformly distributes the power density from the fiber laser.

[0039] The quartz end cap connects to the homogenizing fiber, receives laser light from the homogenizing fiber, and expands and collimates the laser light from the homogenizing fiber.

[0040] The converging lens array has multiple microlenses arranged in an array structure, which receive laser light from the quartz end cap and output converged array laser light.

[0041] The aperture adjusts the overall envelope shape of the converged lattice laser output by the converging lens array;

[0042] The adjustment module receives the converged array laser from the aperture and adjusts the spacing between individual laser spots or the size of individual laser spots.

[0043] In one embodiment of the present invention, the adjustment module, which receives the converged array laser light from the aperture and adjusts the spacing between individual spot sizes or the size of individual spot sizes in the array laser light, further includes:

[0044] The adjustment module is a collimating lens array. Adjusting the focal length of the microlens units on the collimating lens array adjusts the size of the single-point spot in the dot matrix laser; or

[0045] The adjustment module is a convex lens, wherein the convex lens adjusts the spacing between individual light spots in the dot matrix laser by moving along the optical axis; or

[0046] The adjustment module is a lens assembly, which includes a concave lens and a convex lens. The lens assembly adjusts the spacing between individual light spots in the dot matrix laser by moving the convex lens or the concave lens along the optical axis, and adjusts the size of individual light spots in the dot matrix laser by moving the concave lens along the optical axis.

[0047] In another embodiment of the present invention, wherein the adjustment module is a collimating lens array, and adjusting the focal length of the microlens units on the collimating lens array to adjust the size of a single spot in the dot matrix laser further includes:

[0048] The focal length of the microlens in the collimating lens array is smaller than the focal length of the microlens in the converging lens array.

[0049] The focal length of the microlens unit in the collimating lens array is proportional to the size of the single-point spot in the dot matrix laser.

[0050] The collimating lens array transforms the converged fractional laser into a collimated fractional laser.

[0051] In another embodiment of the present invention, the adjustment module is a lens assembly, wherein the lens assembly includes a concave lens and a convex lens, and the lens assembly adjusts the spacing between single-point spots in the dot matrix laser by moving the convex lens or the concave lens along the optical axis. Adjusting the size of a single-point spot in the dot matrix laser by moving the concave lens along the optical axis further includes:

[0052] The concave lens is located between the convex lens and the imaging point of the convex lens;

[0053] When the concave lens moves away from the convex lens, the single-point spot of the dot matrix laser becomes larger, and when it moves closer, it becomes smaller.

[0054] When the convex lens approaches the aperture, the spacing between the individual laser spots increases, and when it moves away, the spacing decreases; and

[0055] The concave lens converts the converged fractional laser into a collimated fractional laser.

[0056] This invention extends the existing technology's structure (fiber laser tail connected to quartz f-end cap) by connecting a homogenizing fiber between the fiber laser and the quartz end cap. A converging lens array, an aperture, and an adjustment module are sequentially connected behind the quartz end cap. This allows for not only outputting fractional laser light but also adjusting the size and spacing of individual fractional laser spots. It retains the advantages of existing technology while adding new functionality. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 A dot matrix laser output device is shown;

[0059] Figure 2 This invention illustrates a specific implementation device for outputting dot matrix laser and having adjustable single-point spot spacing, according to an embodiment of the present invention.

[0060] Figure 3 This invention provides another specific implementation device for outputting a dot matrix laser and having an adjustable single-point spot size;

[0061] Figure 4 This invention provides yet another specific implementation device for outputting a dot matrix laser and having adjustable single-point spot size and spacing;

[0062] Figure 5 This demonstrates a final output of a dot matrix laser;

[0063] Figure 6 This is a flowchart of the method for outputting a dot matrix laser according to the present invention. Detailed Implementation

[0064] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Invention Overview

[0066] The present invention provides a dot matrix laser output device to transform the divergent Gaussian spot output by a fiber laser into a convergent or collimated dot matrix laser spot with uniform energy distribution.

[0067] Exemplary device

[0068] This application provides a dot matrix laser output device, which not only outputs dot matrix laser but also adjusts the size of individual laser spots and the distance between spots. This application provides several embodiments of this device, among which… Figure 1 The device 100 shown is a basic device, and all embodiments mentioned in this application are based on adjustments and substitutions to the device 100. The following descriptions are merely several specific implementations provided by this application and are not intended to limit the scope of protection of this application. Therefore, any variations or substitutions that can be easily conceived by those skilled in the art within the scope of protection disclosed in this application should be included within the scope of protection of this application.

[0069] Figure 1 The device 100 shown includes: a fiber laser 101, a homogenizing fiber 102, a quartz end cap 103, a converging lens array 104, an aperture 105, and an adjustment module 106.

[0070] The fiber laser 101 is a conventional fiber laser that outputs divergent high-power laser light. The energy of the entire laser beam has a Gaussian distribution, meaning the energy is highest at the center of the beam and gradually decreases towards the edges. The fiber laser 101 transmits the output laser light to the homogenizing fiber 102.

[0071] The homogenizing fiber 102 is fused to the output pigtail of the fiber laser 101. The core structure of the homogenizing fiber 102 enables the transmitted light to undergo a series of reflections and scattering processes, transforming the divergent Gaussian spot output by the fiber laser 101 into a flat-topped spot with uniform energy distribution. After generating the flat-topped spot, the homogenizing fiber 102 transmits the flat-topped spot to the quartz end cap 103.

[0072] Although the flat-top beam output from the homogenized fiber 102 has a uniform energy distribution, it is still divergent and the beam is not parallel, spreading as the propagation distance increases. The output end of the quartz end cap 103 is designed with a curved surface structure. The flat-top beam, through the curved surface structure of the quartz end cap 103, changes its propagation angle and refraction direction, becoming a collimated beam. The collimated beam is parallel and non-divergent, and its propagation direction remains essentially unchanged. The quartz end cap 103 delivers the uniformly intensified collimated light to the converging lens array 104.

[0073] The converging lens array 104 has a planar structure on one side and is composed of a number of closely arranged microlens units on the other side, with each microlens having a square shape. The uniform collimated light output from the quartz end cap 103 enters from the side of the converging lens array 104 containing the microlens units, and is uniformly divided into multiple small beams. Each microlens unit converges the divided small beams to a focal point. At this focal point, the small beams converge into a dense lattice, where each point represents a converged small beam. The focal point is located behind the plane of the converging lens array 104. Figure 5 As shown. The square-structured microlens units can be arranged more closely, reducing the spacing between units and thus accommodating more microlens units within a limited space. The uniform collimated light output from the quartz end cap 103 enters from the side of the converging lens array 104 containing the microlens units, which effectively reduces spherical aberration compared to entering from the planar side, resulting in better beam quality.

[0074] The microlens units on the converging lens array can be structures similar to convex lenses, Fresnel lenses, or aspherical structures, as long as they satisfy the requirement that the converging lens array 104 outputs converged array laser light.

[0075] The aperture 105 is placed between the converging lens array 104 and the adjustment module 106, and it adjusts the overall envelope shape of the dot matrix laser according to application requirements. The dot matrix laser formed by the focusing of a uniformly distributed collimated beam through the converging lens array 104 is no longer collimated, and the light will have a certain divergence angle. By placing the aperture 105 between the two lens arrays, it is possible to select only the light within a specific range to enter the adjustment module 106.

[0076] The adjustment module 106 receives the converged dot matrix laser from the aperture 105 and adjusts the spacing between individual light spots or the size of individual light spots in the dot matrix laser. The adjustment module 106 may be a convex lens 206, a collimating lens array 306, or a lens assembly 406.

[0077] The following will describe in detail the implementation device of the adjustment module as a convex lens 206, the implementation device of the adjustment module 106 as a collimating lens array 306, and the specific implementation device of the adjustment module 106 as a lens assembly 406.

[0078] Example 1:

[0079] Figure 2 The adjustment module shown is the implementation device 100-2 for the convex lens 206. The device 100-2 can adjust the spacing between the individual light spots in the dot matrix laser.

[0080] like Figure 2As shown, the fiber laser 101, homogenizing fiber 102, quartz end cap 103, converging lens array 104, and aperture 105 in device 100-2 are the same as those in device 100, and will not be described in detail here. The lens diameter of a microlens array refers to the size of the lens, usually measured in micrometers (μm). The focal length of a microlens array can be selected and adjusted according to design and manufacturing requirements, therefore the specific value of the focal length can vary considerably. Generally, the focal length of a microlens array can range from tens of micrometers (μm) to several millimeters (mm). Because the diameter and spacing of the microlens array are relatively small, convex lenses can be used for magnification and imaging to obtain a larger spacing.

[0081] The convex lens 206 is located to the right of the aperture 105. Moving the convex lens 206 along the optical axis can adjust the distance between individual light spots. The collimated flat-top light output from the quartz end cap 103 enters the converging lens array 104, where it is first split into multiple small beams by the microlens units. Each small beam then converges and diverges at a scattering angle. The diverged small beams then converge again after passing through the convex lens 206. For example... Figure 2 The uppermost small beam A, after passing through the microlens unit, converges into a minimum beam at point a, then diverges, and after passing through convex lens 206, converges again into a beam A1. The lowermost small beam B, after passing through the microlens unit, converges into a minimum beam at point b, then diverges, and after passing through convex lens 206, converges again into a beam B1; the remaining small beams follow the same pattern. Moving convex lens 206 along the optical axis changes the spacing between beams A1, B1, and similar beams. When convex lens 206 approaches aperture 105, the uppermost beam B1 shifts upward, and the lowermost beam A1 shifts downward, increasing the distance between the beams. When convex lens 206 moves away from aperture 105, beam A1 shifts upward, and beam B1 shifts downward, decreasing the distance between the beams.

[0082] In addition, the size of the light spot can be adjusted by changing the distance between the convex lens 206 and the imaging plane A1 B1, thereby adjusting the power density of the light spot.

[0083] Example 2:

[0084] Figure 3 The adjustment module shown is the implementation device 100-3 for the collimating lens array 306. The device 100-3 can adjust the size of the single spot in the array laser and collimate the converged array laser.

[0085] like Figure 3As shown, the fiber laser 101, homogenizing fiber 102, quartz end cap 103, converging lens array 104, and aperture 105 in device 100-3 are the same as those in device 100, and will not be described in detail here. The dot matrix laser output from the converging lens array 105 diverges and becomes collimated dot matrix laser after passing through the collimating lens array 306. The collimating lens array 306 has the same structure as the converging lens array 105, with one side being a plane and the other side being composed of a densely packed array of microlens units, each microlens having a square shape. The converged dot matrix laser enters from the plane of the collimating lens array 306, is refracted and adjusted by the microlens units to become collimated dot matrix laser, and is output from the side of the collimating lens array 306 containing the microlens units. The collimated dot matrix laser output from the collimating lens array 306 is emitted in parallel, with the small beams parallel to each other.

[0086] The size of a single spot in the fractional laser is directly proportional to the focal length of the microlens units in the collimating lens array 306. A smaller focal length results in a smaller spot, while a larger focal length results in a larger spot. Therefore, to avoid affecting the spacing of the original fractional laser array, the focal length of the microlens units in the collimating lens array 306 should be less than the focal length of the microlens units in the converging lens array 104. If the focal length of the microlens units in the collimating lens array 306 is greater than or equal to the focal length of the microlens units in the converging lens array 104, then the single spots of the fractional laser output by the collimating lens array 306 will have no gaps between them, and will no longer be a fractional laser array.

[0087] Example 3:

[0088] Figure 4 The adjustment module shown is the implementation device 100-4 of the lens assembly 406. The device 100-4 can adjust the size of the individual spot in the array laser and the spacing between the individual spot spots, and collimate the converged array laser.

[0089] like Figure 4 As shown, the fiber laser 101, homogenizing fiber 102, quartz end cap 103, converging lens array 104, and aperture 105 in device 100-4 are the same as those in device 100, and will not be described in detail here. The lens assembly 406 includes a convex lens 407 and a concave lens 408.

[0090] Moving the convex lens 407 along the optical axis can adjust the distance between individual light spots in the dot matrix laser. When the convex lens 407 is closer to the aperture 105, the distance between the individual light spots increases; when the convex lens 407 is farther away from the aperture 105, the distance between the individual light spots decreases.

[0091] The concave lens 408 is located to the right of the convex lens 407, and the distance between them is greater than the focal length of the convex lens 407 but less than the image distance of the smallest beam a or b formed by the convex lens 407. The small beams emitted from the convex lens 407 first intersect at the focal point of the convex lens 407, and then converge into the concave lens 408. Each beam has a certain scattering angle. The concave lens 408 collimates the converging small beams. Ideally, the cross-section of the collimated small beams does not increase with the propagation distance, thus maintaining a consistent power density. Furthermore, due to the light-diverging characteristics of the concave lens 408, the scattering angles between the small beams after exiting the concave lens 408 further increase.

[0092] Moving the concave lens 408 along the optical axis allows adjustment of the size of individual spot beams in the fractional laser and fine-tuning of the distances between these spots. Keeping the convex lens 407 stationary, moving the concave lens 408 away from the convex lens 407 reduces the size of the individual spot beams and the distance between them. Conversely, moving the concave lens 408 closer to the convex lens 407 increases the size of the individual spot beams and the distance between them, ensuring the overall size of the fractional laser is controlled within a reasonable range. By moving the concave lens 408 along the optical axis and changing the size of the individual spot beams, the power density of each individual spot can be altered.

[0093] like Figure 4 The uppermost small beam A, after being focused by convex lens 407 and diffused by concave lens 408, appears as a single-point laser spot A2 on the receiving plane. The lowermost small beam B, after being focused by convex lens 407 and diffused by concave lens 408, appears as a single-point laser spot B2 on the receiving plane. When convex lens 407 is closer to aperture stop 105, single-point spot B2 moves upward, single-point spot A2 moves downward, and the distance between the single-point spots increases. When convex lens is farther away from aperture stop 105, single-point spot B2 moves downward, single-point spot A2 moves upward, and the distance between the single-point spots decreases.

[0094] Keeping the position of the convex lens 407 unchanged, move the concave lens 408 along the optical axis. When the concave lens 408 approaches the convex lens 407, the spot lights B2, A2, and other similar spots become larger, the power density of the individual spot lights decreases, and the spacing between the spots increases. When the concave lens 408 moves away from the convex lens 407, the spot lights B2, A2, and other similar spots become smaller, the power density of the individual spot lights increases, and the spacing between the spots decreases.

[0095] The aforementioned device 100-3 requires that the microlens units of the converging lens array 104 and the microlens units of the collimating lens array 309 be precisely aligned. Moreover, current technology can only change the focal length by replacing the microlens units, thus lacking flexibility. In contrast, device 100-4 is simpler, more flexible, and easier to implement.

[0096] Figure 5 This demonstrates a final output of a dot matrix laser.

[0097] The number of single-point laser spots output by devices 100-2, 100-3, and 100-4 is determined by the converging lens array 104 and the aperture 105. Each microlens unit on the converging lens array 105 forms a single-point laser spot, thus the converging lens array determines the maximum number of single-point laser spots that each implementing device can form. Since the aperture 105 allows single-point laser spots with a specific divergence angle to pass through, it determines the final number of single-point laser spots output.

[0098] The power of each individual laser spot is equally divided. The power of the laser output from the fiber laser 101 divided by the number of microlens units in the converging lens array 104 gives the power of each individual laser spot. Assuming the laser output power of the fiber laser 101 is 360W, and the converging lens array 104 has 36 microlens units, with each microlens unit having equal width and height, the power of the laser output from the fiber laser 101 (360W) divided by the number of microlens units (36) equals 10W. Therefore, the power of each individual laser spot in the array is 10W.

[0099] With the number of microlens units in the converging lens array 104 remaining constant, changing the power of a single spot of the array laser only requires changing the output power of the fiber laser 101. This invention is applicable regardless of whether the fiber laser 101 outputs high-power or low-power laser light.

[0100] Exemplary methods

[0101] Figure 6 This is a flowchart of the method for outputting a dot matrix laser provided by the present invention.

[0102] The fiber laser, homogenizing fiber, quartz end cap, converging lens array, aperture, and adjustment module are connected together in sequence.

[0103] Step 601: The fiber laser generates laser light.

[0104] Step 602: The homogenizing fiber is connected to the fiber laser, receives the laser light from the fiber laser, and uniformly distributes the power density from the fiber laser.

[0105] Step 603: Connect the quartz end cap to the homogenizing fiber, receive the laser from the homogenizing fiber, and expand and collimate the laser from the homogenizing fiber.

[0106] Step 604: The converging lens array has multiple microlenses arranged in an array structure, which receive laser light from the quartz end cap and output converging array laser light.

[0107] Step 605: Adjust the aperture to adjust the overall envelope shape of the converged lattice laser output from the converging lens array.

[0108] Step 606: The adjustment module receives the converged dot matrix laser from the aperture and adjusts the spacing between individual light spots or the size of individual light spots in the dot matrix laser.

[0109] If the adjustment module is a collimating lens array, the focal length of the microlens units on the collimating lens array is adjusted to adjust the size of the single-point spot in the fractional laser. The focal length of the microlens units in the collimating lens array is proportional to the size of the single-point spot in the fractional laser, so the focal length of the microlenses in the collimating lens array is smaller than the focal length of the microlenses in the converging lens array, and the collimating lens array converts the converged fractional laser into a collimated fractional laser.

[0110] If the adjustment module is a convex lens, the convex lens adjusts the spacing between the single-point spots in the dot matrix laser by moving along the optical axis.

[0111] If the adjustment module is a lens assembly, wherein the lens assembly includes a concave lens and a convex lens, the lens assembly adjusts the spacing between individual points of light in the fractional laser by moving the convex lens or the concave lens along the optical axis, and adjusts the size of the individual points of light in the fractional laser by moving the concave lens along the optical axis; the concave lens is positioned between the focal length of the convex lens and the imaging point of the convex lens. When the concave lens moves away from the convex lens, the individual points of light in the fractional laser become smaller, and when it moves closer, they become larger. When the convex lens moves closer to the aperture stop, the spacing between the individual points of light in the fractional laser becomes larger, and when it moves away, it becomes smaller. The concave lens transforms the converging fractional laser into a collimated fractional laser.

[0112] This invention is not limited to the specific embodiments disclosed, and the division of aspects does not imply that features in these aspects cannot be combined for benefit; such division is merely for ease of description. This invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

[0113] According to the above description of the present invention, the present invention provides: 1. A dot matrix laser output device, comprising: a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module; wherein: The fiber laser generates laser light; The homogenizing fiber is connected to the fiber laser, receives laser light from the fiber laser, and uniformly distributes the power density from the fiber laser. The quartz end cap connects to the homogenizing fiber, receives laser light from the homogenizing fiber, and expands and collimates the laser light from the homogenizing fiber. The converging lens array has multiple microlenses arranged in an array structure, which receive laser light from the quartz end cap and output converged array laser light. The aperture adjusts the overall envelope shape of the converged lattice laser output by the converging lens array; The adjustment module receives the converged array laser from the aperture and adjusts the spacing between individual laser spots or the size of individual laser spots. 2. The apparatus according to item 1, wherein: The converging lens array has a planar structure on one side and is composed of several microlens units arranged closely on the other side. The converging lens array contains microlens units that receive laser light from the quartz end cap and split it into multiple small laser beams. Each small laser beam is then converged to form a dot matrix laser, with the convergence point of the dot matrix laser located behind the plane of the converging lens array. 3. The device according to item 1, wherein the adjustment module is a convex lens. 4. The apparatus according to item 3, wherein the convex lens adjusts the spacing between the individual light spots in the dot matrix laser by moving along the optical axis. 5. The apparatus according to item 1, wherein the adjustment module is a collimating lens array. 6. The apparatus according to item 5, wherein the focal length of the microlens in the collimating lens array is smaller than the focal length of the microlens in the converging lens array; The collimating lens array transforms the converged fractional laser into a collimated fractional laser. 7. The apparatus according to item 6, wherein the focal length of the microlens unit in the collimating lens array is proportional to the size of the single-point spot in the dot matrix laser. 8. The device according to item 1, wherein the adjustment module is a lens assembly; The lens assembly includes concave lenses and convex lenses; The convex lens receives the converging array laser output from the aperture; The concave lens receives the converging laser output from the convex lens. 9. The apparatus according to item 8, wherein the concave lens is positioned between the convex lens and the imaging point of the convex lens. 10. The apparatus according to item 8, wherein the lens assembly adjusts the spacing between individual light spots in the dot matrix laser by moving the convex lens or the concave lens along the optical axis. The lens assembly adjusts the size of a single spot in the dot matrix laser by moving the concave lens along the optical axis. The concave lens converts the converged fractional laser into a collimated fractional laser. 11. The apparatus according to item 8, wherein: When the convex lens is close to the aperture, the spacing between the single-point laser spots increases; When the convex lens moves away from the aperture, the spacing between the single-point laser spots becomes smaller. 12. The apparatus according to item 8, wherein: When the concave lens moves away from the convex lens, the single-point spot of the dot matrix laser becomes larger; When the concave lens is brought close to the convex lens, the single-point spot of the dot matrix laser becomes smaller. 13. A method for outputting a dot matrix laser, characterized in that the method comprises: sequentially connecting a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module together; wherein... The fiber laser generates laser light; The homogenizing fiber is connected to the fiber laser, receives laser light from the fiber laser, and uniformly distributes the power density from the fiber laser. The quartz end cap connects to the homogenizing fiber, receives laser light from the homogenizing fiber, and expands and collimates the laser light from the homogenizing fiber. The converging lens array has multiple microlenses arranged in an array structure, which receive laser light from the quartz end cap and output converged array laser light. The aperture adjusts the overall envelope shape of the converged lattice laser output by the converging lens array; The adjustment module receives the converged array laser from the aperture and adjusts the spacing between individual laser spots or the size of individual laser spots. 14. The method according to item 13, wherein the adjustment module, receiving the converged array laser from the aperture and adjusting the spacing between individual spot sizes or the size of individual spot sizes in the array laser, further includes: The adjustment module is a collimating lens array. Adjusting the focal length of the microlens units on the collimating lens array adjusts the size of the single-point spot in the dot matrix laser; or The adjustment module is a convex lens, wherein the convex lens adjusts the spacing between individual light spots in the dot matrix laser by moving along the optical axis; or The adjustment module is a lens assembly, which includes a concave lens and a convex lens. The lens assembly adjusts the spacing between individual light spots in the dot matrix laser by moving the convex lens or the concave lens along the optical axis, and adjusts the size of individual light spots in the dot matrix laser by moving the concave lens along the optical axis. 15. The method according to item 14, wherein the adjustment module is a collimating lens array, and adjusting the focal length of the microlens units on the collimating lens array to adjust the size of a single spot in the dot matrix laser further includes: The focal length of the microlens in the collimating lens array is smaller than the focal length of the microlens in the converging lens array. The focal length of the microlens unit in the collimating lens array is proportional to the size of the single-point spot in the dot matrix laser. The collimating lens array transforms the converged fractional laser into a collimated fractional laser. 16. The method according to item 14, wherein the adjustment module is a lens assembly, wherein the lens assembly includes a concave lens and a convex lens, and the lens assembly adjusts the spacing between individual light spots in the fractional laser by moving the convex lens or the concave lens along the optical axis, and adjusting the size of individual light spots in the fractional laser by moving the concave lens along the optical axis further includes: The concave lens is located between the convex lens and the imaging point of the convex lens; When the concave lens moves away from the convex lens, the single-point spot of the dot matrix laser becomes larger, and when it moves closer, it becomes smaller. When the convex lens approaches the aperture, the spacing between the individual laser spots increases, and when it moves away, the spacing decreases; and The concave lens converts the converged fractional laser into a collimated fractional laser.

Claims

1. A dot matrix laser output device, comprising a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module, wherein: - The fiber laser is used to generate laser light; - The homogenizing fiber is connected to the fiber laser. The light from the fiber laser undergoes a series of reflections and scatterings to transform the divergent Gaussian spot output by the fiber laser into a flat-top spot with uniform energy distribution. - The quartz end cap connects to the homogenizing fiber, and the output end of the quartz end cap has a curved structure, which is used to expand and collimate the homogenized laser beam; - The converging lens array has multiple square convex microlenses arranged in an array structure. One side is a planar structure, and the other side is composed of several convex microlens units. The collimated light from the quartz end cap enters from one side of the convex microlens unit of the converging lens array and exits from the planar structure side. It is used to receive the laser from the quartz end cap, split the laser into multiple beams, and converge to output a converging array laser. The microlens units in the converging lens array are arranged in a regular matrix form to achieve a uniform distribution of the laser spot. - The aperture is used to adjust the overall envelope shape of the converging laser output from the converging lens array; - The adjustment module includes a combination of a convex lens and a concave lens. The converging array laser is input from the convex lens and output from the concave lens. The concave lens is positioned between the focal length of the convex lens and the minimum beam imaging distance of the convex lens for the converging array laser. The lens combination ensures that the output dot matrix laser is a collimated dot matrix laser, and the size of each individual spot in the dot matrix laser remains constant during propagation. In the lens assembly, the distance between the convex lens and the concave lens is greater than the focal length of the convex lens and less than the image distance of the minimum beam imaging of the converging array laser by the convex lens. The spacing between the single-point spots and the size of the single-point spots in the array laser are adjusted by moving the convex lens and the concave lens relative to each other along the optical axis. The concave lens collimates the small beams in the converging array laser. The cross-section of the collimated small beams does not increase with the increase of the propagation distance, the power density remains constant, and the scattering angle between the small beams after being output from the concave lens is further increased.

2. A dot matrix laser output device, comprising a fiber laser, a homogenizing fiber, a quartz end cap, a converging lens array, an aperture, and an adjustment module, wherein: - The fiber laser is used to generate laser light; - The homogenizing fiber is connected to the fiber laser. The light from the fiber laser undergoes a series of reflections and scatterings to transform the divergent Gaussian spot output by the fiber laser into a flat-top spot with uniform energy distribution. - The quartz end cap connects to the homogenizing fiber, and the output end of the quartz end cap has a curved structure, which is used to expand and collimate the homogenized laser beam; - The converging lens array has multiple square convex microlenses arranged in an array structure to output laser light from the quartz end cap as a dot matrix laser. One side of the converging lens array is a planar structure, and the other side is composed of several convex microlens units. The collimated light from the quartz end cap enters from one side of the converging lens array microlens unit and exits from the planar structure side. The microlens units in the converging lens array are arranged in a regular matrix form to achieve a uniform distribution of the laser spot. - The aperture is used to adjust the overall envelope shape of the converging laser output from the converging lens array; - The adjustment module includes a collimating lens array with the same structure as the converging lens array. One side is a plane, and the other side is composed of a few convex microlens units arranged closely together. The shape of a single microlens is a square structure. The converging lattice laser enters from the plane of the collimating lens array, is refracted and adjusted by the microlens units to become a collimated lattice laser, and is output from the side of the collimating lens array containing the microlens units. The focal length of the microlens in the collimating lens array is smaller than that of the microlens in the converging lens array, and the focal length of the microlens unit in the collimating lens array is proportional to the size of the single spot in the dot matrix laser; the collimating lens array makes the output dot matrix laser collimated dot matrix laser, and the size of each single spot in the dot matrix laser remains constant during propagation, and the power density remains consistent.

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