Uniform light optical system based on multiple fiber output laser modules and processing head

Abstract

The application discloses a uniform light optical system and a processing head based on multiple fiber output laser modules, which comprises multiple fiber output laser modules, an imaging lens and a light splitting component; the fiber output end faces of the multiple fiber output laser modules are arranged in a plane according to a certain rule; the imaging lens comprises at least one lens and is located on the output light path in the light emitting direction of the fiber output end faces of the laser modules; the light splitting component comprises at least one spatial angle or position light splitting device, and the light splitting devices are independently arranged before the imaging lens, after the imaging lens or between the lenses of the imaging lens; the application directly shapes and uniformly lightens through the optical system by using multiple small-power laser modules, avoids using high-power lasers, thus avoiding the combiner problem in the prior art, reducing the cost and improving the reliability.

Description

Technical Field

[0001] This invention belongs to the field of laser technology and relates to a laser processing optical system and a laser processing head using the optical system, particularly a uniform light optical system and processing head based on multiple fiber output laser modules, which can be widely used in the laser industry. Background Technology

[0002] Many laser applications require uniform laser spots to ensure effective laser processing. Fields such as laser heat treatment, laser cladding, laser welding, and laser medicine all demand uniform spots of various shapes. Currently, laser spot homogenization systems can be divided into two main categories: one directly homogenizes the light output from a semiconductor laser array, and the other couples the laser output light into an optical fiber, then homogenizes the laser spot at the fiber's output end using an optical system. Because the second type of system uses optical fiber for light transmission, the laser and the laser processing head are separate, connected by an optical fiber. The homogenization system's processing head is typically much smaller than the laser, offering greater convenience and making it more popular with users in the market. For such systems, the academic community has developed several solutions, including: a homogenization scheme based on microlens arrays (laser beam expander homogenizer based on microlens arrays CN201410225708.7); a homogenization scheme based on Fresnel lenses (a Fresnel lens for multi-focal spot energy homogenization CN201410499782.8); a homogenization scheme based on binary optical elements (products available); a homogenization scheme using a reflective integrating mirror (commonly used lasers and homogenization transformation systems for laser surface modification, Journal of Changchun University, 2015, Vol. 10); and a combined mirror splitting and superimposing transformation system (commonly used lasers and homogenization transformation systems for laser surface modification, Journal of Changchun University, 2015, Vol. 10), etc.

[0003] In the second type of laser homogenization method mentioned above, a single laser is used, and beam shaping and homogenization are performed through an optical system. However, in reality, high-power lasers are composed of multiple small laser modules combined by a beam combiner. Therefore, the actual implementation path of current homogenization laser processing systems is: 1. Using small-power laser modules and an optical beam combiner to form a high-power laser with fiber output; 2. Shaping and homogenizing the laser output from the fiber through an optical system. In this technical solution, the high-power beam combiner is a very difficult and expensive device to manufacture, and its reliability is also low. This is because the higher the power, the more difficult it is to handle local light loss, and the device is easily burned out. Furthermore, the price per unit power of the high-power laser is usually about twice the price per unit power of the small-power modules that compose it. Homogenization optical systems achieve beam shaping and homogenization by dividing and recombining the Gaussian beam wavefront of the laser. These methods either result in significant energy loss or low beam uniformity. Currently, commercial laser systems typically employ microlens arrays and binary optics for beam homogenization. However, manufacturing high-power microlens arrays and binary optics is difficult and expensive. Finally, once a laser system is designed, its beam pattern is fixed; the beam distribution area and the power distribution within that area cannot be altered, making it difficult to adapt to the ever-changing requirements of laser processing in practical applications. Summary of the Invention

[0004] To address the problems existing in the aforementioned second-type laser homogenization technology, the present invention aims to provide a homogenization optical system and processing head based on multiple fiber-optic laser output modules. The technical approach utilizes multiple low-power laser modules to directly perform shaping and homogenization through the optical system, avoiding the use of high-power lasers. This avoids the beam combiner problem in existing technologies, reducing costs and improving reliability. Furthermore, the technical solution provided by this invention uses conventional optical components, avoiding the use of expensive special optical components, which further reduces system costs and improves homogenization performance. Finally, through independent control of each module, the beam pattern structure can be controlled in real time, bringing great flexibility.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A uniform light optical system based on multiple fiber-optic output laser modules is characterized by comprising multiple fiber-optic output laser modules, an imaging lens, and a beam splitter; the fiber output end faces of the multiple fiber-optic output laser modules are arranged in a plane according to a certain pattern; the imaging lens includes at least one lens located on the output optical path in the direction of light emission from the fiber output end face of the laser module; the beam splitter includes at least one spatial angle or position beam splitter, which are independently located either before, after, or between the lenses of the imaging lens; the imaging lens and the beam splitter constitute a one-to-many point imaging system, enabling the output fiber end face of the laser module to form multiple images on the image plane of the imaging lens, and these images combine to form a uniform light spot.

[0007] The beam splitting component is a polarization beam splitter, a spatial wavefront beam splitter, or a combination of a polarization beam splitter and a spatial wavefront beam splitter.

[0008] The polarization beam splitter is a parallel plate crystal displacement plate that splits the O-beam (normal light) and E-beam (abnormal light) and generates a relative displacement, or a crystal wedge that splits the O-beam (normal light) and E-beam (abnormal light) and generates a relative angular displacement.

[0009] The spatial wavefront beam splitter is either a spatially arranged optical wedge that generates relative deflection of the beam, or a spatially arranged set of multiple reflectors that generate relative deflection of the beam.

[0010] The cross-section of the output optical fiber core of the multiple optical fiber output modules is circular or rectangular.

[0011] The beam-splitting component creates a beam splitting effect with relative displacement in a one-dimensional direction.

[0012] The optical beam splitter simultaneously creates beams with relative displacement in two orthogonal directions.

[0013] The relative durations of the emission of the various fiber-optic laser output modules are the same or different; the power within the relative duration of the emission of each fiber-optic laser output module is the same or different; the relative durations of the emission of the various fiber-optic laser output modules are synchronous or asynchronous; forming a spot structure whose spot shape changes over time to meet the requirements of different laser processing for the spot.

[0014] Furthermore, a laser processing head for a uniform light optical system includes a one-to-many point optical imaging system composed of multiple fiber-optic output laser modules, an imaging lens and a beam splitter, a fiber optic bracket, a one-to-many point optical imaging system support component, and a tubular housing. The output fibers of the multiple fiber-optic output laser modules are fixed on the fiber optic bracket, and their output end faces are arranged in a certain pattern within a plane. The one-to-many point imaging system is fixed on the one-to-many point imaging system support component. The fiber optic bracket is fixed inside the tubular housing near one end, with the fiber output end faces facing the other end of the tubular housing. The one-to-many point imaging system support component is disposed inside the tubular housing. Light emitted from the output fiber end faces of the fiber-optic output laser modules fixed on the fiber optic bracket passes through the one-to-many point imaging system fixed on the one-to-many point imaging system support component and is output from the other end of the tubular housing to generate a uniform light laser spot.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: First, by using a low-power fiber-optic output laser module, the present invention avoids the laser beam combining problem of high-power fiber-optic output laser systems, significantly reducing the cost of the laser source and improving system reliability; second, the laser homogenization system of the present invention uses common optical components, avoiding the use of expensive special optical components, further reducing system cost; third, the homogenization effect is improved; fourth, it can provide a light spot that changes over time, providing flexibility for laser processing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the principle structure of the uniform light optical system based on multiple fiber-optic laser output modules proposed in this invention.

[0017] Figure 2A This is a schematic diagram of the structure of the first beam-splitting component proposed in this invention. It is a parallel plate crystal displacement plate that generates relative displacement.

[0018] Figure 2B This is a schematic diagram of the structure of the second type of beam-splitting component proposed in this invention. It is a crystal wedge that generates relative angular displacement.

[0019] Figure 3A This is a schematic diagram of the third type of beam splitting component proposed in this invention. It is a light wedge that generates relative deflection of the light beam.

[0020] Figure 3B This is a schematic diagram of the fourth type of beam-splitting component proposed in this invention. It consists of multiple reflectors arranged in a spatial arrangement to generate relative beam deflection.

[0021] Figure 4A This is a schematic diagram of one embodiment of the uniform light optical system based on multiple fiber-optic output laser modules proposed in this invention.

[0022] Figure 4B for Figure 4A A schematic diagram of the fiber endface distribution in the illustrated embodiment.

[0023] Figure 4C for Figure 4A A schematic diagram of the light spot distribution in the illustrated embodiment.

[0024] Figure 5A This is a schematic diagram of the second embodiment of the uniform light optical system based on multiple fiber output laser modules proposed in this invention.

[0025] Figure 5B for Figure 5A A schematic diagram of the fiber endface distribution in the illustrated embodiment.

[0026] Figure 5C for Figure 5A A schematic diagram of the light spot distribution in the illustrated embodiment.

[0027] Figure 6A This is a schematic diagram of the third embodiment of the uniform light optical system based on multiple fiber output laser modules proposed in this invention.

[0028] Figure 6B for Figure 6A A schematic diagram of the fiber endface distribution in the illustrated embodiment.

[0029] Figure 6C for Figure 6A A schematic diagram of the light spot distribution formed by the imaging lens in the illustrated embodiment.

[0030] Figure 7 This is a schematic diagram of the structure of a laser processing head using the homogenizing optical system based on multiple fiber output laser modules proposed in this invention.

[0031] Where: M1, M2, ..., M N These represent the fiber optic output module; OB and I represent the object plane where the output fiber end face of the fiber optic output laser module is located and its corresponding conjugate image plane, respectively; M 11 M 1M These represent multiple images formed by the fiber optic output laser module end face of a one-to-many imaging system; BS represents the optical beam splitting system, and 1→MIM represents the one-to-many imaging system; PBS1 and PBS2 represent crystal beam splitting devices; BS1 represents optical wedge beam splitting device; RBS1 and RBS2 represent reflective beam splitting devices; L represents the imaging lens, L1 represents the collimating lens, and L2 represents the focusing lens; GXJ represents the fiber optic support; 1→MZJ represents the support component of the one-to-many imaging system; and GZK represents the tubular shell. Detailed Implementation

[0032] The following describes in detail, with reference to the accompanying drawings and embodiments, the uniform optical system based on multiple fiber-optic output laser modules and the laser processing head utilizing this system.

[0033] Figure 1 This is a schematic diagram illustrating the principle structure of the uniform light optical system based on multiple fiber optic output laser modules proposed in this invention. The N fiber optic output modules are: M1, M2, ..., M... N The end faces of the output optical fibers are distributed on the object plane OB according to a certain pattern. The light emitted from them is imaged onto the conjugate image plane I of the object plane OB by a pair of M (multi-)point imaging systems consisting of imaging lenses and beam splitters. This results in N×M images of the fiber end faces being formed on image plane I. In the figure, M... 11 M 1M These represent multiple images formed by the output fiber end face of the fiber-optic laser module M1 in a one-to-many imaging system 1→MIM. Using this system, a light field distribution of the required shape and uniformity can be formed according to design requirements to meet different processing needs.

[0034] exist Figure 1 In the homogenizing optical system based on multiple fiber-optic output laser modules shown, the optical beam splitting component and the optical imaging lens are each composed of one or more elements. Their combination relationship can be that each element forms a whole, or that the elements interact together, and the setting order can also be flexibly set as needed.

[0035] exist Figure 1 In the homogenizing optical system based on multiple fiber-optic laser output modules shown, the optical beam splitting component can be implemented using a polarization beam splitting method. This beam splitting can be either spatial parallel displacement beam splitting or spatial angular displacement beam splitting. Figure 2A A parallel displacement realization structure is presented, which is a parallel plate crystal displacement plate using a uniaxial crystal. The optical axis of the crystal forms a certain angle with the surface of the plate crystal. When light passes through the crystal, the beam is split into normal light (O) and abnormal light (E). They form a relative lateral displacement in the plane defined by the optical axis and the surface normal. The displacement amount is determined by the two refractive indices of the crystal, the thickness, and the angle between the optical axis and the surface normal. Figure 2B An angular displacement structure is presented, which is a crystal wedge using a uniaxial crystal. The optical axis of the crystal is parallel to one surface of the wedge. When light passes through this crystal, the beam is split into normal light (O) and abnormal light (E). Due to the different refractive indices of the O and E rays, the deflection angles produced by their respective wedges are different, resulting in a certain angular separation between the O and E rays. The amount of angular displacement is determined by the two refractive indices of the crystal and the wedge angle.

[0036] exist Figure 1In the homogenizing optical system based on multiple fiber-optic output laser modules shown, the optical beam splitting component can be implemented using a spatial method, that is, in the transmission space of the beam, spatial angle deflection and beam splitting are performed at different positions of the transmission cross section. Figure 3A A schematic diagram of the optical wedge, the basic element for achieving spatial angle deflection beam splitting, is given. When optical wedges with different wedge angles are inserted at different positions on the beam transmission cross section, angular displacement beam splitting can be achieved. Figure 3B An angle-splitting structure implemented by a two-mirror group is presented. When there is an angle between the two mirrors, deflection-splitting is achieved.

[0037] exist Figure 1 In the uniform light optical system based on multiple fiber output laser modules shown, the cross-sectional shape of the core of the output fiber of the fiber output module can vary, and can be either the commonly used circular shape or a rectangular shape.

[0038] exist Figure 1 In the homogenizing optical system based on multiple fiber-optic output laser modules shown, the optical beam splitting component can form beam splitting with relative displacement in a one-dimensional direction; it can also form beam splitting with relative displacement in two orthogonal directions simultaneously.

[0039] exist Figure 1 In the homogenizing optical system based on multiple fiber-optic laser output modules shown, each fiber-optic laser output module can be independently controlled. The laser module can be a continuous light laser, a quasi-continuous light laser, or a pulsed light laser, meaning that the relative duration of emission can be the same or different. The power of each fiber-optic laser output module within its relative emission duration can be the same or different. The relative duration of emission of the fiber-optic laser output modules can be synchronous or asynchronous, forming a spot structure whose spot shape changes over time to meet the requirements of different laser processing methods for the spot size.

[0040] Figure 4A In one embodiment of the homogenizing optical system based on multiple fiber-optic output laser modules proposed in this invention, the end faces of the output fibers of the multiple fiber-optic output modules are distributed on the object plane OB. Light emitted from point A on a certain output fiber end face is split into normal light O and abnormal light E after passing through the polarization beam splitter PBS1. These two beams are laterally displaced relative to each other, which is equivalent to forming two images, A and A'. After passing through the imaging lens, two image points Ai1 and Ai2 are formed on the conjugate image plane. Obviously, this system forms two sets of laterally misaligned images on the image plane from the end faces of the output fibers of the multiple fiber-optic output modules, which together constitute the light distribution on the image plane.

[0041] In this embodiment: the cross-section of the output fiber core of the fiber optic output module is square, and all end faces are arranged in a straight line in one direction with a spacing of twice the side length of the square fiber core, such as... Figure 4B As shown. The polarization beam splitter PBS1 is a parallel planar crystal shifter that splits the output fiber end face of the fiber output module into two sets of images with relative lateral displacement, namely O-beam and E-beam. The lateral displacement is equal to the side length of the square fiber core, and the displacement direction is the same as the fiber alignment direction. After passing through a lens, these two images are formed. Figure 4C The image shows a strip-shaped uniform light distribution. This light distribution can be applied to laser heat treatment and laser cladding processes.

[0042] In one of our actual designs, a total of 20 optical fibers were used. The square core of the output fiber had a side length of 100 micrometers, and the fiber spacing was 200 micrometers, forming a strip-shaped light spot with an aspect ratio of 40:1. By using lenses with different magnification, laser light spots of different sizes can be formed.

[0043] In one of our practical designs, the output power of the two outermost fibers in the laser system consisting of the aforementioned 20 fibers is 20% greater than that of the other fibers in the middle. This shoulder-raised strip-shaped energy distribution structure can compensate for the influence of edge thermal conduction on laser processing and provide a more uniform processing effect.

[0044] In one of our practical designs, the output power of each module in the laser system consisting of the above 20 optical fibers is independently controlled, which can perform laser processing on areas with varying widths.

[0045] Figure 5A This is a second embodiment of the uniform light optical system based on multiple fiber optic output laser modules proposed in this invention. The end faces of the output fibers of the multiple fiber optic output modules are distributed on the object plane OB. Light emitted from point A on a certain output fiber end face is split into normal light O and abnormal light E after passing through the polarization beam splitter PBS2. These two beams are angularly displaced relative to each other, which is equivalent to forming two images, A' and A''. After passing through the imaging lens, BS1, which is positioned on the light transmission cross section and occupies 50% of the cross section, further forms four image points AO1, AO2, AE1, and AE2 on the conjugate image plane I. Obviously, this system forms four sets of mutually laterally misaligned images on the image plane from the end faces of the output fibers of the multiple fiber optic output modules, which together constitute the light distribution on the image plane.

[0046] exist Figure 5A In the illustrated embodiment: the cross-section of the output fiber core of the fiber optic output module is circular with a diameter of 125 micrometers, and all end faces are arranged in a straight line with a spacing of 125 micrometers in one direction, such as... Figure 5BAs shown. The polarization beam splitter PBS1 is a crystal wedge that forms two images, O-beam and E-beam, with a certain angular displacement from the fiber end face. The spacing between the images is determined by the displacement angle and the distance from PBS2 to the object plane. In this embodiment, the spacing is one-quarter of the fiber spacing, i.e., 31.25 micrometers, and its displacement direction is the same as the fiber end face alignment direction. After passing through the lens, the beam is split into two groups by the beam splitter BS1, which is an optical wedge occupying half of the beam cross-section, forming two groups of images with a certain displacement on the image plane. The distance between these two groups of images is determined by the deflection angle of the optical wedge and the distance from the optical wedge to the image plane. In this embodiment, the displacement is 62.5 micrometers multiplied by the magnification of the imaging system, and the displacement direction is the same as the fiber end face distribution direction. This forms four groups of fiber end face images on the conjugate image plane, which are superimposed to form Figure 5C The image shows a strip-shaped uniform light distribution. This light distribution can be applied to laser heat treatment and laser cladding processes.

[0047] Figure 6A This is a third embodiment of the uniform light optical system based on multiple fiber output laser modules proposed in this invention. The imaging lens consists of a collimating lens L1 and a focusing lens L2, and the end faces of the output fibers of the multiple fiber output modules are distributed on the front focal plane OB of the collimating lens. Light emitted from point A on the end face of an output fiber is split into normal light (O) and abnormal light (E) by polarization beam splitter PBS1. These two beams are angularly displaced, effectively forming two images, A' and A'', which are separated in the direction perpendicular to the plane of the paper. After passing through a collimating lens, reflectors RBS1 and RBS2, each occupying 50% of the optical transmission cross-section and positioned at a certain angle, split the light into two beams with a certain angle in space. These beams then pass through a focusing lens, forming four image points AO1, AO2, AE1, and AE2 on the rear focal plane I of the focusing lens. The reflectors RBS1 and RBS2 create image separation in the direction parallel to the plane of the paper. Clearly, this beam splitting system splits the light in two perpendicular directions, forming four sets of laterally misaligned images on the image plane from the end faces of the output fibers of multiple fiber output modules. These images together constitute the light distribution on the image plane.

[0048] exist Figure 6A In the illustrated embodiment: the cross-section of the output fiber core of the fiber optic output module is square, and the end faces of the six fibers are two-dimensionally distributed in the object plane, as shown below. Figure 6BAs shown, four optical fibers are arranged in a two-dimensional square, with the spacing between them being the side length of the cross-section of the fiber core. The other two fibers are located three times the side length of the fiber core below the four fibers, and the spacing between them is three times the side length of the core. The polarization beam splitter PBS1 is a crystal wedge that forms two images, O-beam and E-beam, from the fiber end face with a certain angular displacement. The spacing between the images is determined by the displacement angle and the distance from PBS1 to the object plane. In this embodiment, the spacing is the same as the side length of the core of the square fiber, and its displacement direction is parallel to one side of the core of the square fiber. After passing through a lens, the beam is further split into two groups on the conjugate image plane I by mirrors RBS1 and RBS2, which are positioned on the optical transmission cross section and each occupy 50% of the cross section with a certain angle. This forms two groups of images with a certain displacement on the image plane. The distance between these two groups of images is determined by the relative deflection angle formed by the mirrors and their distance from the image plane. In this embodiment, the displacement is the side length of the square fiber core, and the displacement direction is perpendicular to the direction generated by PBS1. This forms four groups of images of the fiber end face on the conjugate image plane, which are superimposed to form... Figure 6C The image shows a uniform light distribution across three regions. This type of light distribution is widely used in laser welding processes.

[0049] In one of our practical designs, the output power of each module in the aforementioned laser system is independently controlled. By controlling the relative power of the main beam and the two auxiliary beams, the requirements of laser processing under different process conditions can be met. The laser module used can be a continuous beam module or a pulsed beam module.

[0050] Figure 7 This is a schematic diagram of the laser processing head utilizing the homogenizing optical system based on multiple fiber-optic output laser modules proposed in this invention. N fiber-optic output modules: M1, M2, ..., M N The end face of the output optical fiber is fixed to the optical fiber support GXJ according to a certain pattern; the optical fiber support GXJ is fixed to one end of the tubular shell GZK; a pair of multi-point imaging systems 1→MIM, consisting of an imaging lens and a beam splitter, is fixed to the pair of multi-point imaging system support component 1→MZJ; the pair of multi-point imaging system support component 1→MZJ is located inside the tubular shell GZK. The light emitted from the end face of the output optical fiber of the optical fiber output laser module fixed to the optical fiber support passes through the pair of multi-point imaging system 1→MIM fixed to the pair of multi-point imaging system support component 1→MZJ and is output from the other end of the tubular shell GZK. The resulting uniform laser spot is used for laser processing.

[0051] This invention proposes a homogenizing optical system based on multiple fiber-optic laser output modules. By employing multiple low-power laser modules as the light source, it avoids the laser beam combining problem required with high-power lasers, reducing system cost and increasing system reliability. Furthermore, the use of traditional imaging and beam-splitting components to construct the homogenizing system further reduces cost. Finally, the beam pattern can be manipulated in real time, flexibly adapting to different laser processing requirements. The laser processing head designed using this optical system can be used in laser heat treatment, laser cladding, and laser welding.

Claims

1. A uniform light optical system based on multiple fiber-optic output laser modules, characterized in that, The system includes multiple fiber-optic laser output modules, an imaging lens, and a beam splitter. The fiber output end faces of the multiple fiber-optic laser output modules are arranged in a plane according to a certain pattern. The imaging lens includes at least one lens located on the output optical path in the direction of light emission from the fiber output end face of the fiber-optic laser output module. The beam splitter includes at least one spatial angle or position beam splitter, which is located independently, either before, after, or between the lenses of the imaging lens. The imaging lens and the beam splitter constitute a one-to-many point optical imaging system, enabling the output fiber end face of the fiber-optic laser output module to form multiple images on the image plane of the imaging lens. These images combine to form a uniform light spot. The relative durations of light emission from the fiber optic output laser modules may be the same or different; the power within the relative durations of light emission from each fiber optic output laser module may be the same or different; the relative durations of light emission from the fiber optic output laser modules may be synchronous or asynchronous. To form a spot structure whose shape changes over time, thus meeting the requirements of different laser processing for the spot; The beam splitting component is a polarization beam splitter, a spatial wavefront beam splitter, or a combination of a polarization beam splitter and a spatial wavefront beam splitter; the polarization beam splitter is a parallel plate crystal displacement plate that splits the O-beam and E-beam and generates a relative displacement, or a crystal wedge that splits the O-beam and E-beam and generates a relative angular displacement; the spatial wavefront beam splitter is a spatially arranged optical wedge that generates a relative deflection of the beam, or multiple spatially arranged mirrors that generate a relative deflection of the beam.

2. The uniform optical system based on multiple fiber-optic output laser modules according to claim 1, characterized in that: The cross-section of the output fiber core of the multiple fiber output laser modules is circular or rectangular.

3. The uniform light optical system based on multiple fiber-optic output laser modules according to claim 1, characterized in that: The beam-splitting component creates a beam splitting effect with relative displacement in a one-dimensional direction.

4. The uniform light optical system based on multiple fiber-optic output laser modules according to claim 1, characterized in that: The beam-splitting component simultaneously forms beams with relative displacement in two orthogonal directions.

5. A laser processing head utilizing the uniform light optical system of claim 1, characterized in that: The system comprises a one-to-many optical imaging system consisting of multiple fiber-optic output laser modules, imaging lenses, and beam splitters; a fiber optic support; a one-to-many optical imaging system support component; and a tubular housing. The output fibers of the multiple fiber-optic output laser modules are fixed to the fiber optic support, with their output end faces arranged in a specific pattern within a plane. The one-to-many optical imaging system is fixed to the one-to-many optical imaging system support component. The fiber optic support is fixed inside the tubular housing near one end, with the fiber optic output end faces towards the other end of the tubular housing. The one-to-many optical imaging system support component is located inside the tubular housing. Light emitted from the output fiber end faces of the fiber-optic output laser modules fixed to the fiber optic support passes through the one-to-many optical imaging system fixed to the one-to-many optical imaging system support component and is output from the other end of the tubular housing, generating a uniform laser spot.

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