CN107971630B - A method and laser processing system for producing light spots with special light intensity distribution - Google Patents

Abstract

The invention relates to the technical field of laser processing, and specifically discloses a method for generating a spot with a special light intensity distribution and a laser processing system. The method includes: obtaining the light intensity distribution parameter of the target spot; The position parameter of the exit end of the N beams of incoherent beams, where N is a positive integer; the N beams of incoherent beams are superimposed to obtain a superimposed special spot with a special light intensity distribution. The invention provides a method and laser processing system for producing a spot with a special light intensity distribution, which can obtain a spot with a special light intensity distribution without any other auxiliary design. The cost is low, and any The light spot with special light intensity distribution has strong flexibility and wide application range.

Description

A method and laser processing system for producing light spots with special light intensity distribution

technical field

The invention relates to the technical field of laser processing, in particular to a method for generating light spots with special light intensity distribution and a laser processing system.

Background technique

Laser processing technology is a processing technology that uses the characteristics of the interaction between the laser beam and the material to cut, weld, surface treat, drill and micro-process materials. It is the most common application of laser systems. In the field of laser processing technology, in order to achieve a special or better processing effect, it is necessary to adjust the light intensity distribution of the laser spot, ie, spot shaping. Existing spot shaping techniques include:

1. Based on traditional discrete optical components, by selecting a suitable lens combination, the phase and intensity of light are controlled to achieve the purpose of spot shaping. The disadvantage of this method is that each optical lens needs to be specially designed, the design process is complicated and the cost is high; moreover, the combination of multiple lenses is adopted, and the structure is bulky.

2. Based on the method of light diffraction, the target spot is obtained by modulating the phase and light intensity of the input beam by designing the template of binary optics. The disadvantage of this method is that the design is complicated, the cost is high, the optical quality of the input light beam is high, and there is a problem of optical power loss.

3. By using a special optical fiber, such as a square optical fiber, the input beam enters the optical fiber to generate a variety of high-order modes, and the purpose of spot shaping is achieved through sufficient mixing between the modes. The disadvantage of this method is that the manufacturing process of the special optical fiber is complicated, the manufacturing process is difficult to control, the manufacturing cost is high, it is difficult to weld with other optical fibers, and the obtained light spot has a single shape.

In the process of realizing the present invention, the inventors found the following problems in related technologies: in the prior art, the lens combination method, the binary optical design method or the special optical fiber method all have the problems of high cost and complicated design process.

Contents of the invention

Embodiments of the present invention provide a method and a laser processing system for generating a light spot with a special light intensity distribution, which can solve the problems of high cost and complicated design process of the existing light spot shaping technology.

On the one hand, an embodiment of the present invention provides a method for generating a spot with a special light intensity distribution, including:

Obtain the light intensity distribution parameters of the target spot;

Determine the position parameters of the exit ends of the N beams of incoherent light beams according to the light intensity distribution parameters, and the N is a positive integer;

The N beams of incoherent light beams are superimposed to obtain a superimposed special light spot with a special light intensity distribution.

Wherein, the determination of the position parameters of the exit ends of the N beams of incoherent light beams according to the light intensity distribution parameters includes:

Coupling N beams of incoherent light beams into N optical fibers respectively, the output ends of the N optical fibers being the outgoing ends of the N beams of incoherent beams;

determining position parameters of the output ends of the N optical fibers according to the light intensity distribution parameters;

Determine the number N and output characteristics of the N incoherent beams according to the light intensity distribution parameters, and determine the characteristic parameters of the N optical fibers according to the output characteristics, and the characteristic parameters include: core diameter, cladding diameter , far-field mode field diameter and numerical aperture;

adjusting the relative positions between the output ends of the N optical fibers according to the light intensity distribution parameter, the number N, the core diameter, the cladding diameter and the far-field mode field diameter;

The distance between the output ends of the N optical fibers and the position where the special light spot is generated is determined according to the far-field mode field diameter and the numerical aperture.

Optionally, after the step of determining the position parameters of the output ends of the N optical fibers according to the light intensity distribution parameters, it further includes:

Performing optical simulation on the N bundles of incoherent light beams in a simulation program according to the position parameters of the output ends of the N optical fibers to obtain the light intensity distribution of the simulated light spots;

The position parameter is adjusted according to the light intensity distribution of the simulated light spot until the light intensity distribution of the simulated light spot matches the light intensity distribution parameter of the target light spot.

Optionally, after the step of superimposing the N beams of incoherent light beams to obtain a special spot with a special light intensity distribution, it further includes:

Perform collimation and focusing processing on the special light spot.

On the other hand, the embodiment of the present invention also provides a kind of laser processing system, and described laser processing system comprises:

A laser with a pigtail, used to generate N beams of incoherent beams, where N is a positive integer, and the output end of the pigtail is the exit end of the incoherent beams;

The simulation device includes: an acquisition unit and a positioning unit, the acquisition unit is used to acquire the light intensity distribution parameter of the target spot, and the positioning unit is used to determine the position of the exit end of the N beams of incoherent light beams according to the light intensity distribution parameter positional parameters;

A laser beam combiner, configured to superimpose the N beams of incoherent light beams to obtain a superimposed special spot with a special light intensity distribution;

Wherein, the positioning unit includes:

A selection module, configured to determine the number N and output characteristics of the N beams of incoherent light beams according to the light intensity distribution parameters, determine N characteristic parameters of the pigtails according to the output characteristics, and the characteristic parameters include: Core diameter, cladding diameter, far field mode field diameter and numerical aperture;

An optical fiber positioning module, configured to adjust the distance between the output ends of the N pigtails according to the light intensity distribution parameter, the number N, the core diameter, the cladding diameter, and the far-field mode field diameter relative position of

A working distance module, configured to determine the distance between the output ends of the N pigtails and the position where the special light spot is generated according to the far-field mode field diameter and the numerical aperture.

The beneficial effect of the embodiment of the present invention lies in that the embodiment of the present invention provides a method and a laser processing system for generating a spot with a special light intensity distribution, by adjusting the output ends of N beams of incoherent light beams according to the light intensity distribution parameters of the target spot Arrange the positions reasonably, and then superimpose the N beams of incoherent beams to obtain a special spot with a special light intensity distribution, without other auxiliary design, low cost, and can form any special spot according to different requirements The light spot with light intensity distribution has strong flexibility and wide application range.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the following will briefly introduce the accompanying drawings used in the embodiments of the present invention. Apparently, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

FIG. 1 is a schematic flowchart of a method for generating a spot with a special light intensity distribution provided by Embodiment 1 of the present invention;

Figure 2 is a schematic diagram of coupling 4 incoherent light beams into 4 optical fibers;

Figure 3-1 is the light intensity distribution diagram of the four incoherent beams before superimposition and the light intensity distribution diagram of the square flat top spot generated after superposition;

Figure 3-2 is the light intensity distribution diagram of the 6 incoherent beams before superimposition and the light intensity distribution diagram of the hollow concave annular spot generated after the superposition;

Figure 3-3 is the light intensity distribution diagram of the 6 incoherent beams before superposition and the light intensity distribution diagram of the rectangular spot generated after the superposition;

Fig. 4 is a schematic structural diagram of a laser processing system provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that, if there is no conflict, various features in the embodiments of the present invention may be combined with each other, and all of them are within the protection scope of the present invention. In addition, although functional modules are divided in the schematic diagram of the system, and the logical order is shown in the flow chart, in some cases, the division of modules in the system or the sequence shown in the flow chart can be performed differently. or the steps described.

A method for generating a light spot with a special light intensity distribution provided by an embodiment of the present invention uses the superposition principle of light intensity to generate a light spot with any light intensity distribution characteristics, such as: linear light spot, square light spot, flat-top light spot, and rectangular light spot , Hollow sunken annular spot, etc. A method for producing a spot with a special light intensity distribution provided by the embodiment of the present invention can be applied to various technical fields such as special lighting, laser marking, and laser processing, especially in the field of laser processing technology, and can satisfy various types of processing needs. The following embodiments are applied in the technical field of laser processing as examples, but are not intended to limit the scope of application of the present invention.

The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Embodiment one

Fig. 1 is a schematic flowchart of a method for generating a spot with a special light intensity distribution provided by Embodiment 1 of the present invention, please refer to Fig. 1, the method includes:

110. Acquire light intensity distribution parameters of the target light spot.

In this embodiment, the "target spot" refers to a special spot set to achieve a certain function, and the specific shape, size, light intensity distribution and other characteristics of the spot can be determined according to different application scenarios. For example: in the process of laser processing, if a ring-shaped workpiece needs to be heated, the target spot can be set as a ring-shaped spot that matches the ring-shaped workpiece; or, if it is necessary to mark a uniform on the surface of the object If there is a square groove, the target spot can be set as a square flat-top spot. In addition, the "light intensity distribution parameter" refers to the light intensity distribution requirements for the target spot in order to achieve a specific processing function, and the light intensity distribution parameter may include: the shape, size and center of the target spot. The intensity distribution of light in each area, etc., wherein the light intensity distribution parameter can be expressed in the form of a light distribution diagram.

In this embodiment, firstly, according to the processing function to be realized, the light intensity distribution parameters of the target spot are acquired. Wherein, the way to obtain the light intensity distribution parameters of the target spot can be to first preset the light intensity distribution parameters of a plurality of different target spots for a plurality of commonly used processing functions, and store the light intensity distribution parameters of the target spot in the system In the process, when one of the processing functions needs to be realized, the target spot and its light intensity distribution parameters matching the processing function can be directly called in the system; or, when it needs to be used, the user can directly input it manually in the system The light intensity distribution parameter of the target spot.

120. Determine position parameters of exit ends of N incoherent light beams according to the light intensity distribution parameters, where N is a positive integer.

In this embodiment, the "N beams of incoherent light beams" refers to N beams of light that do not cause light interference, and these beams have independent vibration directions, vibration frequencies or phase differences. The N beams of light may be N beams of laser output from N different lasers, or N beams of incoherent lasers generated by splitting and incoherently adjusting the laser output from the same laser, or, when the present invention When the embodiment is applied in the technical field of special lighting, the N beams of light may also be N beams of natural light. Wherein, the "N" is the number of required beams determined according to the light intensity distribution parameters of the target spot, which is a positive integer. In addition, the "exit end" refers to the exit port of the N beams of incoherent light in the system; the "position parameter" includes: the relative position between the exit ends of the N beams of incoherent light and the The distance between the exit end of the N beams of incoherent beams and the position where the special spot is generated.

In some embodiments, the N beams of incoherent light beams can be coupled into N optical fibers at first, then, the output ends of the N optical fibers are the outgoing ends of the N beams of incoherent beams; then according to the light intensity of the target spot The distribution parameters determine the location parameters of the N optical fibers. Wherein, the position parameters of the N optical fibers include: the relative position between the output ends of the N optical fibers and the distance between the output ends of the N optical fibers and the position where the special light spot is generated. Further, the relative position may include relative displacement and relative angle. For example: as shown in Figure 2, four incoherent light beams a1, a2, a3 and a4 can be coupled into four optical fibers b1, b2, b3 and b4 respectively, output ends c1, c2, c3 and c4 are the exit ends of the four incoherent light beams a1, a2, a3 and a4. Due to the softness of the optical fiber, it is convenient to adjust the relative positions of the outgoing ends of the N incoherent beams by first coupling the N incoherent beams into the N optical fibers.

In some embodiments, after coupling N beams of incoherent light beams into N optical fibers, the following steps may be used to determine the position parameters of the output ends of the N optical fibers:

First, determine the output characteristics and the number N of the N incoherent beams according to the light intensity distribution parameters, and determine the characteristic parameters of the N optical fibers according to the output characteristics, and the characteristic parameters include: core diameter, wrapping layer diameter, far-field mode field diameter, and numerical aperture. Wherein, the "output characteristic" refers to the characteristic of the incoherent light beam emitted from the output end of the optical fiber, including parameters such as divergence angle, beam waist diameter and spot shape. Generally, the laser emitted from the output end of an ordinary optical fiber is a Gaussian beam. Therefore, the output beam is a Gaussian beam as an example for further description, but it is not used to limit the present invention. For example, if the target spot is a square top-hat spot, then according to its light intensity distribution parameters, the number of optical fibers can be determined as N=4, and the far-field mode field diameter is 170 μm, the numerical aperture is 0.15, and the optical fiber diameter is 125 μm; If the target spot is a hollow concave annular spot, then according to its light intensity distribution parameters, the number of optical fibers can be determined to be N=6, and an optical fiber with a far-field mode field diameter of 100 μm, a numerical aperture of 0.15, and a fiber diameter of 125 μm can be selected; or, If the target spot is a rectangular spot, then according to its light intensity distribution parameters, the number of optical fibers can be determined to be N=6, the far-field mode field diameter is 190 μm, the numerical aperture is 0.15, and the optical fiber diameter is 125 μm.

Then, adjust the relative positions among the output ends of the N optical fibers according to the light intensity distribution parameter, the number N, the fiber core diameter, the cladding diameter and the far-field mode field diameter. For example, if the target spot is a square flat-top spot, according to the light intensity distribution parameters of the spot and the above-mentioned characteristic parameters of the optical fiber, it can be determined that the four optical fibers are closely arranged in a 2X2 array, and the distance between the cores can be set to 125 μm; if the target spot It is a hollow ring-shaped spot. According to the light intensity distribution parameters of the spot and the above-mentioned characteristic parameters of the optical fiber, six optical fibers are arranged in a ring. The distance between the cores can be set to 150 μm. The target spot is a rectangular spot. According to the intensity distribution parameters and the above characteristic parameters of the optical fiber, it is determined that 6 optical fibers are closely arranged in a 2X3 array, and the distance between the cores can be set to 125 μm.

Finally, the distance between the output ends of the N optical fibers and the position where the special light spot is generated is determined according to the far-field mode field diameter and the numerical aperture. Since N beams of incoherent beams are superimposed at different positions, different superposition effects can be produced. Therefore, in order to generate a special spot that matches the target spot, it is necessary to determine the distance between the output ends of the N optical fibers and the position where the special spot is generated. And this distance can be determined by the formula: the numerical aperture of the far-field mode field diameter of described distance=optical fiber/optical fiber, for example: in order to produce the far-field mode field diameter of the optical fiber that the square flat-top spot selects is 170 μ m, numerical aperture is 0.15 , then the distance between the output end of the optical fiber and the position where the special light spot is generated is: 170/0.15=567 μm; similarly, the distances corresponding to the hollow annular light spot and rectangular light spot are: 333 μm and 633 μm, respectively.

Further, in order to improve the degree of matching between the generated special light spot and the target light spot, the position parameter of the output end of the above-mentioned optical fiber can be further optimized. The optimization method can perform optical simulation on the N bundles of incoherent light beams in a simulation program according to the position parameters of the output ends of the N optical fibers to obtain the light intensity distribution of the simulated light spot; then according to the simulated light spot The position parameter is adjusted until the light intensity distribution of the simulated light spot matches the light intensity distribution parameter of the target light spot. Wherein, this process can be implemented in any software or program capable of optical/mathematical calculation simulation, including but not limited to: Matlab, Zemax, TracePro, Comsol, etc.

130. Superimpose the N beams of incoherent light beams to obtain a superimposed special light spot with a special light intensity distribution.

In this embodiment, the N beams of incoherent beams are superimposed at appropriate positions according to the superposition principle of light intensity. Since the beams in this embodiment have incoherent characteristics, the superposition of N beams is essentially N The superposition of the intensity of the beam beams will not produce interference phenomenon. Different position parameters of the exit ends of the N incoherent light beams can obtain different special light spots with special light intensity distributions. For example, as shown in Figure 3-1 to Figure 3-3, according to different combinations of incoherent beams and their position parameters, after superimposing the incoherent beams, a square flat-topped spot 31b and a hollow hollow annular spot 32b can be obtained and a rectangular spot 33b. In Figures 3-1 to 3-3, 31a is the light intensity distribution diagram of the spot before the superposition of 4 incoherent beams arranged in 2X2, and 31b is the light intensity distribution diagram of the spot after the superposition of the incoherent beams; 32a is 6 The light intensity distribution diagram of the spot before the superposition of the incoherent beams arranged in a beam ring, 32b is the light intensity distribution diagram of the spot after the superposition of the incoherent beams; and, 33a is the spot before the superposition of 6 incoherent beams arranged in 2X3 33b is a light intensity distribution diagram of the spot after the incoherent light beams are superimposed. It should be noted that in 31a, 32a and 33a, the smaller the diameter of the circle, the greater the corresponding light intensity.

It can be seen from the above technical solutions that the beneficial effects of the embodiments of the present invention are: by reasonably arranging the positions of the exit ends of the N beams of incoherent beams according to the light intensity distribution parameters of the target spot, and then performing the N beams of incoherent beams By stacking, a special spot with a special light intensity distribution can be obtained without any other auxiliary design, and the cost is low. Moreover, any spot with a special light intensity distribution can be formed according to different requirements, with strong flexibility and a wide range of applications. In addition, by coupling N beams of incoherent beams into N optical fibers, it is easy to adjust the position of the exit end of the incoherent beams; through optical simulation and corresponding fine-tuning, the degree of matching between the generated special spot and the target spot can be further improved.

Embodiment two

The difference between this embodiment and Embodiment 1 is that in this embodiment, after the step of superimposing the N beams of incoherent light beams to obtain a special spot with a special light intensity distribution, the special spot can also be Collimation and focus processing.

In this embodiment, the special light spot is collimated, and the special light spot is converted into collimated light/parallel light, and then the collimated light is focused, depending on the focal length selected by the collimation and focusing lens , can form a larger or smaller special spot. During the process of collimating and focusing, the characteristics of the original special spot will not be changed.

The beneficial effect of this embodiment is that: by performing collimation and focusing processing on the obtained special light spot, a larger or smaller light spot consistent with the characteristics of the original special light spot can be obtained, which can meet more processing requirements.

Embodiment three

Fig. 4 is a schematic structural diagram of a laser processing system provided by Embodiment 3 of the present invention, please refer to Fig. 4, the laser processing system 4 includes:

A laser 41, configured to generate N beams of incoherent light beams, where N is a positive integer;

The simulation device 42 is used to obtain the light intensity distribution parameters of the target spot, and determine the position parameters of the exit ends of the N beams of incoherent light beams according to the light intensity distribution parameters;

The laser beam combiner 43 is configured to superimpose the N beams of incoherent light beams to obtain a superimposed special spot with a special light intensity distribution.

In this embodiment, the laser 41 can be various types of lasers, such as semiconductor lasers, solid-state lasers, fiber lasers, gas lasers, etc., and the number can be one or more. In some embodiments, the laser 41 is a laser with a pigtail, and the output end of the pigtail is the output end of the incoherent light beam. The use of a pigtailed laser can make use of the softness of the optical fiber to facilitate adjustment of the position of the exit end of the N beams of incoherent light beams. Therefore, the following uses a pigtailed laser as an example for further illustration.

In this embodiment, the simulation device 42 may be any device capable of obtaining the light intensity distribution parameters of the target spot, and determining the position parameters of the exit ends of the N beams of incoherent light beams according to the light intensity distribution parameters, including but Not limited to: smart terminals, control terminals and supercomputers, etc. Wherein, the simulation device 42 includes:

An acquisition unit 421, configured to acquire light intensity distribution parameters of the target spot;

The positioning unit 422 is configured to determine the position parameters of the exit ends of the N incoherent light beams according to the light intensity distribution parameters. Wherein, the positioning unit 422 includes:

The selection module 422a is used to determine the number N and output characteristics of the N beams of incoherent light beams according to the light intensity distribution parameters, and determine N characteristic parameters of the pigtails according to the output characteristics, and the characteristic parameters include: Core diameter, cladding diameter, far field mode field diameter and numerical aperture;

An optical fiber positioning module 422b, configured to adjust one of the output ends of the N pigtails according to the light intensity distribution parameter, the number N, the core diameter, the cladding diameter, and the far-field mode field diameter relative position between

The working distance module 422c is configured to determine the distance between the output ends of the N pigtails and the position where the special light spot is generated according to the far-field mode field diameter and the numerical aperture.

In this embodiment, the position parameters of the exit ends of the N beams of incoherent light beams are first obtained by the simulation device 42, and the specific process may be: (1) obtain the light intensity distribution parameters of the target spot by the acquisition unit 421; The selection module 422a in the unit 422 determines the number N and output characteristics of the N beams of incoherent light beams according to the light intensity distribution parameters, and determines N characteristic parameters of the pigtails according to the output characteristics, and the characteristics Parameters include: fiber core diameter, cladding diameter, far-field mode field diameter and numerical aperture; The core diameter, the cladding diameter and the far-field mode field diameter adjust the relative position between the output ends of the N pigtails; (4) in the working distance module 422c in the positioning unit 422, according to the The far-field mode field diameter and the numerical aperture determine the distance between the output ends of the N pigtails and the position where the special light spot is generated. Then, according to the determined position parameters, the positions of the exit ends of the N beams of incoherent beams in the laser 41 are adjusted, and the laser 41 generates N beams of incoherent beams. Finally, the N beams of incoherent light beams are superimposed by the laser beam combiner 43 to obtain a superimposed special spot with a special light intensity distribution.

In some embodiments, further, the positioning unit 422 may further include a simulation module and an adjustment module. The simulation module is used to perform optical simulation on the N bundles of incoherent light beams in a simulation program according to the position parameters of the output ends of the N pigtails, so as to obtain the light intensity distribution of the simulated light spot; the adjustment module uses The position parameter is adjusted according to the light intensity distribution of the simulated light spot until the light intensity distribution of the simulated light spot matches the light intensity distribution parameter of the target light spot. Adding the simulation module and the adjustment module can make the position parameters of the exit ends of the N beams of incoherent beams more accurate, and further improve the matching degree between the generated special spot and the target spot.

In some embodiments, the laser processing system 4 also includes a collimator and a focuser, which are used to collimate and focus the generated special spot, so as to obtain larger or smaller characteristics of the special spot. Consistent flare. By adding a collimator and a focuser to the laser processing system, a suitable spot size can be obtained, the application range of the special spot can be expanded, and more processing requirements can be met.

It can be known from the above technical solutions that the beneficial effects of the embodiments of the present invention are: by using the simulation device, the positions of the exit ends of the N beams of incoherent beams are reasonably arranged according to the light intensity distribution parameters of the target spot, and then the laser beam combiner is used to By superimposing the N beams of incoherent light beams, a special spot with a special light intensity distribution can be obtained without other auxiliary design, and the cost is low, and any spot with a special light intensity distribution can be formed according to different requirements, with flexibility Strong, wide application range. In addition, by using a laser with a pigtail, it is easy to adjust the position of the exit end of the incoherent light; through the simulation module and the adjustment module for optical simulation and corresponding fine-tuning, the degree of matching between the generated special spot and the target spot can be further improved; By adding a collimator and a focuser, the application range of the special spot can be expanded.

It should be noted that, since the laser processing system is based on the same inventive concept as the method for generating a spot with a special light intensity distribution in Embodiments 1 and 2, the corresponding content in Method Embodiments 1 and 2 is also applicable to Embodiment 3, which will not be described in detail here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, The steps may be performed in any order, and there are many other variations of the different aspects of the invention as described above, which have not been presented in detail for the sake of brevity; although the invention has been described in detail with reference to the preceding examples, those of ordinary skill in the art The skilled person should understand that it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various implementations of the present invention. The scope of technical solutions.

Claims (4)

1. a kind of generate the method with the hot spot of special light distribution, which is characterized in that the described method includes:

Obtain the light distribution parameter of target hot spot；

Determine that the location parameter of the exit end of N beam non-coherent bundle, the N are positive integer according to the light distribution parameter；

The N beam non-coherent bundle is overlapped, the superimposed special hot spot with special light distribution is obtained；

Wherein, the location parameter of the exit end that N beam non-coherent bundle is determined according to the light distribution parameter, comprising:

N beam non-coherent bundle is coupled into N number of optical fiber respectively, the output end of N number of optical fiber is the N beam non-coherent bundle Exit end；

The quantity N and output characteristics that the N beam non-coherent bundle is determined according to the light distribution parameter, it is special according to the output Property determines the characteristic parameter of N number of optical fiber, the characteristic parameter include: core diameter, cladding diameter, far field mode field diameter and Numerical aperture；

It is straight according to the light distribution parameter, the quantity N, the core diameter, the cladding diameter and the far field mould field Diameter adjusts the relative position between the output end of N number of optical fiber；

The output end of N number of optical fiber is determined according to the far field mode field diameter and the numerical aperture and generates the special light The distance of the position of spot.

2. the method according to claim 1, wherein it is described determined according to the light distribution parameter it is described N number of After the step of location parameter of the output end of optical fiber, further includes:

Optics is carried out to the N beam non-coherent bundle in the simulation program according to the location parameter of the output end of N number of optical fiber Analog simulation obtains the light distribution of the hot spot of analog simulation；

The location parameter is adjusted according to the light distribution of the hot spot of the analog simulation, until the hot spot of the analog simulation The light distribution parameter adaptation of light distribution and the target hot spot.

3. being obtained the method according to claim 1, wherein described be overlapped the N beam non-coherent bundle After there is the step of special hot spot of special light distribution, further includes:

Collimation and focus processing are carried out to the special hot spot.

4. a kind of laser-processing system, which is characterized in that the laser-processing system includes:

Laser with tail optical fiber, for generating N beam non-coherent bundle, the N is positive integer, and the output end of the tail optical fiber is described The exit end of non-coherent bundle；

Simulator, comprising: acquiring unit and positioning unit, the acquiring unit are used to obtain the light distribution ginseng of target hot spot Number, the positioning unit are used to determine that the position of the exit end of the N beam non-coherent bundle is joined according to the light distribution parameter Number；

Laser bundling device obtains superimposed with special light distribution for being overlapped to the N beam non-coherent bundle Special hot spot；

Wherein, the positioning unit, comprising:

Selecting module, for determining the quantity N and output characteristics of the N beam non-coherent bundle according to the light distribution parameter, Determine the characteristic parameter of N number of tail optical fiber according to the output characteristics, the characteristic parameter include: core diameter, cladding diameter, Far field mode field diameter sum number value aperture；

Fiber orientation module, for according to the light distribution parameter, the quantity N, the core diameter, the cladding diameter And the far field mode field diameter adjusts the relative position between the output end of N number of tail optical fiber；

Operating distance module, for determining the output of N number of tail optical fiber according to the far field mode field diameter and the numerical aperture It holds at a distance from the position for generating the special hot spot.