CN117977369A - Laser module and laser system - Google Patents

Abstract

The application provides a laser module and a laser system, which relate to the technical field of laser and comprise a sealed shell with an inner cavity and at least three laser modules positioned in the inner cavity, wherein the at least three laser modules are spatially staggered along the horizontal direction or spatially staggered along the vertical direction to form a laser module so as to facilitate the laser beams emitted by the at least three laser modules to be emitted after being inserted into a hollow combined beam, thereby realizing the high power requirement. And each laser module is provided with a first cooling passage, and heat exchange is realized with the laser module by means of a cooling medium flowing through the first cooling passage, so that heat in the inner cavity is brought to the outside of the sealing shell in time, the temperature in the inner cavity is effectively reduced, and the heat dissipation capacity of a product is improved.

Description

Laser module and laser system

Technical Field

The application relates to the technical field of lasers, in particular to a laser module and a laser system.

Background

The high-power semiconductor laser has the advantages of small volume, light weight, high efficiency, long service life and the like, is widely used in the fields of laser processing, cladding and the like, and becomes a core device with rapid development, multiple achievements, wide subject penetration and wide application range in the new century.

The existing high-power laser has higher power, generally several kilowatts, and few systems with the power higher than ten thousand watts are more complicated in system structure and more prominent in heat dissipation problem, but because the use environment of the product is a dusty environment, the product also needs to be designed into a sealed cavity based on reliability consideration, so that the heat dissipation of the product is poor due to the sealed cavity, the internal temperature is easily high and can reach 94 ℃, and the burn of the laser is caused.

Disclosure of Invention

The application aims to overcome the defects in the prior art, and provides a laser module and a laser system to solve the problem that the temperature in a cavity is too high due to sealing of the existing high-power laser.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows:

In one aspect of the embodiments of the present application, a laser module is provided, including a sealed housing having an inner cavity and at least three laser modules located in the inner cavity, where the at least three laser modules are spatially offset along a horizontal direction or spatially offset along a vertical direction to form a laser module, and the laser module is used for making laser beams emitted from the at least three laser modules emit after being inserted into a hollow beam, and a first cooling channel for circulating a cooling medium is provided on each laser module.

At least three laser modules in the sealed inner cavity are arranged in a space dislocation mode so that laser beams are emitted after being inserted into the hollow beam combination, and therefore high power requirements are met.

Optionally, the laser module further includes a cooling pipeline extending to the inner cavity through the sealed shell, the cooling pipeline includes a main pipeline and a plurality of branch pipelines, the branch pipelines are respectively communicated with the first cooling channels of the at least three laser modules in a one-to-one correspondence manner, and the cross section area of the main pipeline is greater than or equal to the sum of the cross section areas of the branch pipelines.

The cooling pipeline connected into the inner cavity is communicated with the first cooling passage, and heat exchange between the inside and the outside of the sealed shell is realized by means of cooling media. The plurality of branch pipelines are arranged, so that each laser module can realize heat dissipation, and when the sectional area of the main pipeline is larger than or equal to the sum of the sectional areas of the plurality of branch pipelines, cooling media in the main pipeline can be distributed into the plurality of branch pipelines more evenly, so that the heat dissipation requirement of each laser module is met.

Optionally, each laser module includes a base and at least two stacked lasers arranged on the base, and laser beams emitted by the at least two stacked lasers are inserted into the stitching beam to form laser beams emitted by the laser module.

In order to further improve the integration level of the laser modules, so that the high power output is met while the small volume is kept, each laser module can emit light beams in the same direction by at least two stacked laser light emitting units in a mode of inserting stitching beams.

Optionally, at least two stacked lasers are connected in series through electrodes, the electrodes are flexible electrodes, and the flexible electrodes are provided with at least one bending part.

Considering that the semiconductor device is characterized by high current and low voltage, at least two stacked lasers can be connected in series through electrodes in order to meet the high current requirement of the lasers. When the flexible electrode connection is adopted between the stacked lasers, stress generated during the installation of the stacked lasers can be effectively relieved by means of the bendable characteristic of the flexible electrode, in other words, the stress generated during the installation of the stacked lasers is relieved by the aid of the bending part of the flexible electrode, and the problem of light emitting quality reduction caused by position deviation of the stacked lasers is avoided. When flexible electrode connection is adopted between the stacked lasers, the laser module package can be more compact, and the module volume is smaller.

Optionally, each laser module further includes a stripe beam combiner disposed on the base, and at least two stacked lasers are distributed on opposite sides of the stripe beam combiner.

In consideration of space arrangement and beam combination requirements, the base is provided with the stripe beam combination lenses, and the stacked lasers with the number greater than or equal to 2 are distributed on two opposite sides of the stripe beam combination lenses, so that light beams emitted by the stacked lasers on two opposite sides of the stripe beam combination lenses are emitted in the same direction after the stitching beams are inserted through reflection and transmission of the stripe beam combination lenses.

Optionally, each laser module further includes a mounting frame fixedly arranged on the base, the stripe beam combining lens is arranged on the base through the mounting frame, and the surface of the mounting frame is set to be a light reflecting surface.

Because each laser module is provided with the stripe beam combining lens, in order to ensure the accuracy of the light distribution of the stripe beam combining lens and the corresponding stacked laser, the stripe beam combining lens can be installed and fixed on the base of the corresponding laser module through the installation frame. And because the laser beam is when outgoing, the unavoidable stray light that has is struck to the mounting bracket, in order to avoid the mounting bracket to influence the work of stripe beam combining mirror because of excessively absorbing stray light high temperature, can handle the surface of mounting bracket, form the light reflection face for the surface of mounting bracket has better reflection characteristic, thereby maintains the work of stripe beam combining mirror at low temperature environment.

Optionally, the at least three laser modules include at least two first-class laser modules and at least one second-class laser module, a reflecting mirror is arranged on the light emitting side of the first-class laser module, and the laser beam emitted by the first-class laser module is inserted into the empty beam with the laser beam emitted by the second-class laser module after being reflected by the reflecting mirror.

In order to further improve the integration level of the laser module, so as to maintain a smaller volume while meeting the requirement of high-power output, at least three laser modules can be divided into a first type laser module and a second type laser module, wherein the light emitting side of the first type laser module is provided with a reflecting mirror, and the second type laser module which is not provided with the reflecting mirror on the light emitting side is used for realizing the space beam insertion and combination, thereby reducing the arrangement difficulty while maintaining a smaller volume.

Optionally, an adjusting frame is disposed on the base of the first type of laser module, and the reflector is fixedly disposed on the base of the first type of laser module through the adjusting frame, where the adjusting frame is used for adjusting the posture of the reflector.

Since each first-class laser module is provided with the reflecting mirror, in order to ensure the accuracy of the light distribution of the reflecting mirror and the corresponding first-class laser module, the stripe beam combining mirror can be installed and fixed on the base of the corresponding first-class laser module through the adjusting frame. In order to facilitate light distribution, the adjusting frame can also have a function of adjusting the posture, so that the posture of the reflecting mirror in the space is adjusted, and the emergent light beams of the first type of laser modules can be accurately inserted into and combined with the light beams emergent from other laser modules.

Optionally, the surface of the adjustment frame is provided as a light reflecting surface.

Because the laser beam is emergent, the unavoidable stray light irradiates the adjusting frame, in order to avoid the adjusting frame from excessively absorbing the excessive stray light temperature and affecting the work of the reflector, the surface of the adjusting frame can be treated to form a light reflecting surface, so that the surface of the adjusting frame has better reflection characteristic, and the reflector is maintained to work in a low-temperature environment.

Optionally, a diaphragm structure is arranged on the light-emitting side of the at least three laser modules, and a second cooling channel for circulating a cooling medium is arranged on the diaphragm structure.

The quality of the emergent beam can be further improved through the diaphragm structures at the light emitting side of at least three laser modules, and in view of the characteristics that the diaphragm structures can block part of the beam, in order to avoid overhigh temperature caused by light blocking of the diaphragm structures, a second cooling passage can be arranged on the diaphragm structures, and the diaphragm structures can be effectively radiated through the second cooling passage, so that the temperature of the diaphragm structures is maintained in a lower zone. Therefore, the temperature in the inner cavity can be further reduced, and the heat dissipation capacity of the product is improved.

Optionally, a light absorbing layer is disposed on the surface of the diaphragm structure, or the surface of the diaphragm structure is configured to have a diffuse reflection function.

In order to further improve the quality of the outgoing light beam, a light absorption layer may be disposed on the surface of the diaphragm structure, or the surface of the diaphragm structure may be configured to have a diffuse reflection function, so that stray light may be effectively absorbed, and the probability that the stray light may be irradiated to the adjusting frame or the mounting frame may be reduced.

Optionally, a first window and a first optical window for sealing the first window are arranged on the sealing shell, and the laser beams of the at least three laser modules are emitted through the first optical window after being inserted into the hollow beam combination.

The sealing shell is provided with the first window which is convenient for emitting light beams, the first window is provided with the first light window to realize the sealing of the first window, and the inner cavity is prevented from being influenced by water vapor, dust and the like.

Optionally, an annular groove is arranged at the inner periphery of the first window, the outer periphery of the first optical window is correspondingly inserted into the annular groove, and a sealing piece is further clamped between the first optical window and two opposite side walls of the annular groove.

In order to seal the inner cavity well through the first optical window, an annular groove which is convenient for the first optical window to be inserted in is arranged at the inner periphery of the first window, so that the stability of the first optical window is ensured, sealing elements are further clamped between the opposite side walls of the first optical window and the annular groove, and gaps between the inner side and the outer side of the first optical window and the annular groove are sealed by the sealing elements.

Optionally, the laser module further includes a protection window fixedly disposed on the sealed housing and located outside the first optical window, the protection window includes a second optical window, a fixing plate with a slot, and an optical window frame inserted in the slot, where the second optical window is detachably mounted on the optical window frame, so that laser beams of at least three laser modules are emitted sequentially through the first optical window and the second optical window after being inserted into the empty beam.

The drawer structure is formed by the slot and the second light window frame, when the light window frame needs to be replaced, the light window frame can be pulled out first, and then the second light window is replaced and pushed in, so that the replacement efficiency can be improved.

Optionally, a third cooling passage is provided on the fixing plate on the peripheral side of the second optical window, the third cooling passage being for circulating a cooling medium.

In view of the fact that the first optical window is usually relatively close to the processing surface, in order to protect the first optical window, a protection window can be arranged between the first optical window and the processing surface to protect the first optical window, so that reliable sealing of the inner cavity is achieved. Of course, because the second light window is closer to the processing surface, so the second light window belongs to a consumable product, and needs to be replaced frequently, in order to improve the replacement efficiency, the second light window can be detachably connected with the light window frame. In addition, the temperature around the second optical window can be reduced by heat exchange of the cooling medium flowing through the third cooling passage, and the replacement period of the second optical window can be prolonged.

Optionally, two adjacent laser modules are detachably connected.

In order to realize laser products with different powers, the laser modules can be modularized, the number of the laser modules is increased and reduced in a detachable connection mode, and the laser modules emit light beams in the same direction. In the case of increasing or decreasing the number, it is conceivable to form the laser module with a spatial offset in the horizontal direction or a spatial offset in the vertical direction.

In another aspect of the embodiments of the present application, a laser system is provided, including any one of the laser modules described above. The temperature in the inner cavity of the laser system during working can be effectively reduced by utilizing the laser module, and the heat dissipation capacity of the laser system is improved, so that the laser system has longer continuous working time.

The beneficial effects of the application include:

The application provides a laser module and a laser system, which comprise a sealed shell with an inner cavity and at least three laser modules positioned in the inner cavity, wherein the at least three laser modules are spatially staggered along the horizontal direction or spatially staggered along the vertical direction to form a laser module, and the laser module is used for leading laser beams emitted by the at least three laser modules to be emitted after being inserted into a blank beam for beam combination, thereby realizing high power requirements. And each laser module is provided with a first cooling passage, and heat exchange is realized with the laser module by means of a cooling medium flowing through the first cooling passage, so that heat in the inner cavity is brought to the outside of the sealing shell in time, the temperature in the inner cavity is effectively reduced, and the heat dissipation capacity of a product is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a laser unit according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a cooling pipeline according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a laser module according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a stripe beam combiner and a mounting base according to an embodiment of the present application;

FIG. 5 is a second schematic diagram of a laser module according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a slow axis optical path of a laser module according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a fast axis optical path of a laser module according to an embodiment of the present application;

FIG. 8 is a schematic view of a laser module according to an embodiment of the present application expanding in a vertical direction;

FIG. 9 is a second schematic view of a laser module according to an embodiment of the application extending along a vertical direction;

fig. 10 is a schematic view of a laser module according to an embodiment of the present application expanding in a horizontal direction;

FIG. 11 is a schematic diagram illustrating the cooperation between a laser unit and a diaphragm structure according to an embodiment of the present application;

fig. 12 is a schematic diagram of the cooperation of a diaphragm structure according to an embodiment of the present application;

fig. 13 is a schematic diagram of an optical path of a first class of laser modules according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a first class of laser modules according to an embodiment of the present application;

FIG. 15 is a schematic view of a reflector and an adjusting frame according to an embodiment of the present application;

Fig. 16 is a schematic structural view of an adjusting frame according to an embodiment of the present application;

Fig. 17 is a schematic structural diagram of a protection window according to an embodiment of the present application;

Fig. 18 is a schematic structural diagram of a laser module according to an embodiment of the present application;

Fig. 19 is a schematic view illustrating positions of a first optical window and a protection window according to an embodiment of the present application;

fig. 20 is a schematic diagram of the cooperation between a first optical window and a first window according to an embodiment of the present application.

Icon: 100-laser units; 111-a first stacked laser; 112-a second stacked laser; 120-base; 130-a stripe beam combiner; 131-a second stripe beam combiner; 132-a first stripe combiner; 134-mounting rack; 141-a second class laser module; 1411-fourth stacked lasers; 1412-third stacked lasers; 142-a first class laser module; 1421-a first stacked laser; 1422-a second stacked laser; 151-a mirror; 160-an optical shaping component; 170-diaphragm structure; 172-a first cooling medium inlet/outlet; 173-a second cooling passage; 181-main pipeline; 190-flexible electrode; 182-primary piping; 183-diode circuit; 210-a mirror mount; 211-a mirror mount; 212-rotating an adjusting spring plunger; 213-pitch adjustment jack; 214-screws; 215-rotating shaft; 220-fixing plates; 221-a second cooling medium inlet/outlet; 222-a second light window; 223-light window frame; 230-a main housing; 231-a rear sealing plate; 232-lens mount; 250-outgoing light beam; 260-a first light window; 261-first window; 262-annular groove; 263-seal.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. It should be noted that, under the condition of no conflict, the features of the embodiments of the present application may be combined with each other, and the combined embodiments still fall within the protection scope of the present application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of description of the present application and for simplification of description, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In an aspect of the embodiment of the present application, as shown in fig. 1 and fig. 18, a laser module is provided, which includes a sealed housing having an inner cavity and at least three laser modules located in the inner cavity, where the at least three laser modules are spatially offset in a horizontal direction or spatially offset in a vertical direction to form a laser module, so that laser beams emitted from the at least three laser modules can be inserted into a hollow beam and then emitted in parallel to a target area to form a target light spot, thereby realizing a high power requirement, and further providing a vanwatt-level high-power laser module.

In view of the fact that each laser module needs to emit laser beams, the heat productivity is high, a first cooling passage can be arranged in each laser module for reducing the temperature in the inner cavity, and therefore heat exchange can be achieved with the laser module by means of cooling media flowing through the first cooling passage, so that heat generated in the inner cavity can be brought to the outside of the sealed shell in time through the cooling media, the cooling media can be cooled through a radiator outside the sealed shell, cooling of the stacked laser in the sealed shell is achieved through circulation, the temperature in the inner cavity is effectively reduced, and the heat dissipation capacity of products is improved.

It should be appreciated that the present application is not limited to the path of the first cooling path within the laser module, and may be, for example, in an S-shaped or Z-shaped distribution.

Optionally, as shown in fig. 2, the laser module further includes a cooling line extending into the inner cavity through the sealed housing, and the cooling line may be in communication with a first cooling passage of the at least three laser modules, so as to implement a circulating flow of the cooling medium.

When designing the pipeline, as shown in fig. 2, the cooling pipeline may include a main pipeline 181 and a plurality of branch pipelines, one ends of the plurality of branch pipelines are respectively communicated with the main pipeline 181, and the other ends of the plurality of branch pipelines are respectively communicated with the first cooling passages of at least three laser modules in a one-to-one correspondence manner, so that the first cooling passages for distributing the refrigerant medium to the at least three laser modules can be realized by adding the plurality of branch pipelines to the main pipeline 181, and thus, the heat exchange requirement of each laser module is realized. Of course, the material of the cooling medium is not limited in the present application, and may be, for example, liquid or gas.

With continued reference to fig. 2, in order to ensure that each laser module can uniformly distribute a sufficient amount of cooling medium to ensure that the heat dissipation requirement is met, the cross-sectional area of the main pipeline 181 should be greater than or equal to the sum of the cross-sectional areas of the plurality of branch pipelines, so as to ensure that the cooling medium in the main pipeline 181 can be fully distributed into each branch pipeline, and the cross-sectional areas of each branch pipeline should be reasonably set by referring to the heat dissipation requirement of the laser module in combination with the flow velocity, which is not particularly limited by the present application.

In one embodiment, each branch pipeline may be a single-channel pipeline, or may be a dual-channel or multi-channel pipeline, for example, as shown in fig. 2, each branch pipeline includes one primary pipeline 182 and two secondary pipelines 183, where the primary pipeline 182 is two, and the two secondary pipelines 183 are respectively communicated with the main pipeline 181 through the primary pipeline 182, where the cross-sectional area of the main pipeline 181 may be greater than or equal to the sum of the cross-sectional areas of all primary pipelines 182, and the cross-sectional area of each primary pipeline 182 may be greater than or equal to the sum of the cross-sectional areas of all secondary pipelines 183 communicated therewith. Similarly, when there are a plurality of three-stage, four-stage, and the like pipes communicating with the secondary pipe 183, the primary pipe 181, the primary pipe 182, and the secondary pipe 183 may be referred to as corresponding ones.

Optionally, in order to further improve the integration level of the laser modules, so as to meet high power output and keep a smaller volume, each laser module may include a plurality of light emitting sources, for example, each laser module includes a base 120 and at least two stacked lasers disposed on the base 120, each stacked laser may be excited to emit a laser beam correspondingly when energized, and the light beams emitted by the at least two stacked lasers are emitted in the same direction after being inserted with the suture beam, so as to improve the power of the laser module.

In consideration of space arrangement and beam combination requirements, the base 120 may be provided with a beam combining stripe mirror 130, and then at least two stacked lasers are separately disposed on two opposite sides of the beam combining stripe mirror 130, in other words, the stacked lasers with a number greater than or equal to 2 are separated into two parts, one part is located on the transmission side of the beam combining stripe mirror 130, and the other part is located on the reflection side of the beam combining stripe mirror 130, so that the light beams emitted by the two stacked lasers are respectively reflected and transmitted by the beam combining stripe mirror 130, and are emitted along the same direction after the stitching beam is inserted. In some embodiments, the number of stacked lasers may be even (2, 4, 6, etc.), so as to obtain a better beam combining effect, for example: when the number of the stacked lasers is two, as shown in fig. 3, the stacked laser one 111 and the stacked laser two 112 are respectively located at two opposite sides of the stripe beam combining mirror 130, so that the beam emitted by the stacked laser one 111 is emitted after being reflected by the stripe beam combining mirror 130, the beam emitted by the stacked laser two 112 is emitted after being transmitted by the stripe beam combining mirror 130, and the beam emitted after being reflected and the beam emitted after being transmitted are emitted in the same direction after being inserted into the stitching beam; also for example: when the number of the stacked lasers is 6, 3 stacked lasers are distributed on one side of the stripe beam combiner 130, and the other 3 stacked lasers are distributed on the other side of the stripe beam combiner 130. Of course, in some embodiments, the number of stacked lasers may also be an odd number (3, 5, 7, etc.), for example: when the number of the stacked lasers is three, 2 stacked lasers are distributed on one side of the stripe beam combining lens 130, and the other 1 stacked lasers are distributed on the other side of the stripe beam combining lens 130; also for example: when the number of stacked lasers is 5, the number of the stacked lasers distributed on one side of the stripe beam combiner 130 may be x, the number of the stacked lasers distributed on the other side of the stripe beam combiner 130 may be 5-x, and x is a natural number which is less than 5 and is non-zero.

Alternatively, as shown in fig. 5, considering that the semiconductor device is characterized by a high current and a low voltage, in order to meet the high current requirement of the laser, a plurality of stacked lasers in each laser module may be connected in series through electrodes, for example, a current greater than 100A may be passed.

In some embodiments, as shown in fig. 5, when the stacked lasers are connected by using the flexible electrode 190, stress generated during installation of the stacked lasers can be effectively relieved by virtue of the free bending characteristic of the flexible electrode 190, in other words, the stress generated during installation of the stacked lasers is relieved by enabling the flexible electrode 190 to have at least one bending part, so that the problem of light emitting quality degradation caused by position deviation of the stacked lasers is avoided.

In some embodiments, the flexible electrode 190 is formed by welding multiple layers of thin sheets at the bending position of the electrode, so that the angle can be spatially adjusted, assembly stress is avoided, and the conductive requirement is met.

Alternatively, as shown in fig. 3 and 4, since each laser module has the beam combiner 130, in order to ensure the accuracy of the beam matching of the beam combiner 130 and the corresponding stacked laser, the beam combiner 130 may also be mounted and fixed on the base 120 of the corresponding laser module by the mounting frame 134.

In addition, because the laser beam is emitted, the mounting frame 134 is inevitably irradiated by stray light, in order to avoid that the mounting frame 134 affects the operation of the stripe beam combining lens 130 due to excessively high stray light absorption temperature, the surface of the mounting frame 134 can be treated, so that the surface of the mounting frame 134 has better reflection characteristics, and the stripe beam combining lens 130 is maintained to operate in a low-temperature environment. In some embodiments, when the surface of the mounting bracket 134 is treated, the outer surface of the mounting bracket 134 may be made specular by the surface treatment; of course, the surface of the mounting frame 134 may be plated with a reflective layer, such as gold plating, chrome plating, or other reflective materials, which is not particularly limited by the present application.

Optionally, the optical path principle of the laser module of the present application will be further described with reference to the accompanying drawings: in order to further improve the integration level of the laser modules and facilitate space layout, at least three laser modules may include different types of laser modules, as shown in fig. 1, where at least three laser modules include at least two first type laser modules 142 and at least one second type laser module 141, a reflecting mirror 151 is disposed on the light emitting side of the first type laser module 142, and no reflecting mirror 151 is disposed on the light emitting side of the second type laser module 141, for example, as shown in fig. 1 and 3 in combination, the laser module shown in fig. 3 may be used as the second type laser module 141; as shown in connection with fig. 1 and 14, the laser module shown in fig. 14 may be used as the first-type laser module 142.

As shown in fig. 1, the first type laser module 142 and the second type laser module 141 are arranged in a staggered space, specifically: the two first-class laser modules 142 are spaced apart, with the gap between them just serving as the second-class laser module to emit the beam.

As shown in fig. 1, 6, 7 and 13, the first type of laser module 142 includes a first stacked laser 1421, a second stacked laser 1422, and a first stripe beam combiner 132 therebetween, and a reflecting mirror 151 is disposed on the light emitting side of the first stripe beam combiner 132. In operation, the first stacked laser 1421 emits a laser beam to the first stripe beam combiner 132 and then reflects the laser beam to the mirror 151, and the second stacked laser 1422 emits a laser beam to the first stripe beam combiner 132 and then transmits the laser beam to the mirror 151, so that the laser beams respectively transmitted and reflected to the mirror 151 are reflected by the mirror 151 and then emitted by the stitching beam.

The second class laser module 141 includes a third stacked laser 1412, a fourth stacked laser 1411, and a second stripe combiner 131 therebetween. In operation, the third stacked laser 1412 emits a laser beam to the second stripe beam combiner 131 and then reflects the laser beam, and the fourth stacked laser 1411 emits a laser beam to the second stripe beam combiner 131 and then transmits the laser beam, so that the laser beams respectively transmitted and reflected are inserted into the stitching beam and emitted.

Thus, the laser beams emitted from the two first-class laser modules 142 are reflected by the reflecting mirror 151 and then are combined with the laser beams directly emitted from the second-class laser modules 141 in an inserting way. By inserting the stitching bundles and inserting the empty bundles, 10000W of output power can be realized.

As shown in fig. 6 and fig. 7, in order to further improve the light output quality of the laser module, an optical shaping component 160 may be further provided, so that the laser beam after the insertion and the combination forms a target light spot in the target area after passing through the optical shaping component 160. The target spot may be a rectangular spot of 3.5mm x 28 mm.

Of course, the number of the first type of laser modules 142 and the second type of laser modules 141 in the laser module is not limited, and the number of the first type of laser modules 142 and the second type of laser modules 141 can be increased and decreased in a detachable manner, so that stacked laser products with different powers can be realized, and all the stacked lasers emit light beams along the same direction so as to form a combined beam. In the case of increasing or decreasing the number, it is conceivable to form the laser module with a spatial offset in the horizontal direction or a spatial offset in the vertical direction. The application is not limited to the specific detachable form, and can be in various modes such as screw connection, clamping connection and the like.

In one embodiment, as shown in fig. 1, two first type laser modules 142 and one second type laser module 141 are combined to form a laser unit 100, and when the laser unit 100 is expanded, as shown in fig. 8, the expansion may be performed in a vertical direction in units of the laser unit 100, and two adjacent laser units 100 may be detachably connected.

In one embodiment, the number of the first type laser modules 142 and the second type laser modules 141 may be increased individually, for example, as shown in fig. 9, by adding one second type laser module 141 in the vertical direction based on one laser unit 100, and then adding one first type laser module 142.

In one embodiment, as shown in fig. 10, the expansion may be further performed in a horizontal direction, for example, as shown in fig. 10 (a) and 10 (b), in units of the laser units 100, and two adjacent laser units 100 may be detachably connected.

Alternatively, as shown in fig. 14, since each first-type laser module 142 is configured with a mirror 151, in order to ensure accuracy of light distribution between the mirror 151 and the corresponding first-type stacked laser, the stripe beam combiner 130 may be mounted and fixed on the base 120 of the corresponding first-type laser module 142 by an adjusting bracket. In order to facilitate light distribution, the adjusting frame can also have a function of adjusting the posture, so that the posture of the reflecting mirror 151 in the space is adjusted, and the emergent light beams of the first type of laser modules 142 can be accurately inserted into and combined with the light beams emergent from other laser modules.

In one embodiment, as shown in fig. 15 and 16, the adjusting frame includes a mirror holder 210 and a mirror holder 211, wherein the mirror 151 is fixedly mounted on the mirror holder 210, the mirror holder 210 is disposed on the mirror holder 211, and the mirror holder 210 is rotatably connected with the mirror holder 211 through a rotation shaft 215, and rotation adjusting spring plungers 212 disposed on opposite sides of the mirror holder 210 are further disposed on the mirror holder 211, so that the mirror holder 210 can be driven to rotate around the rotation shaft 215 relative to the mirror holder 211 by rotating the adjusting spring plungers 212, thereby adjusting the rotation angle of the mirror holder 210, that is, adjusting the rotation angle of the mirror 151.

On this basis, the adjustment of the pitch angle can be also realized, and as shown in fig. 15 and 16, 4 pitch adjustment jackscrews 213 abutting against the mirror frame 210 are further provided on the bottom surface of the mirror base 211, and the pitch angle of the mirror frame 210 is adjusted by adjusting the pitch adjustment jackscrews 213.

As shown in fig. 15 and 16, when the adjustment is completed, the fixing of the mirror holder 210 to the mirror mount 211 can be achieved by the screw 214.

Optionally, as shown in fig. 14, as the laser beam exits, the adjusting frame is inevitably irradiated by stray light, so as to avoid that the adjusting frame excessively absorbs the stray light to affect the operation of the reflecting mirror 151, the surface of the adjusting frame may be treated to form a light reflecting surface, so that the surface of the adjusting frame has better reflection characteristics, and the reflecting mirror 151 is maintained to operate in a low-temperature environment. In some embodiments, when the surface of the adjusting frame is treated, the surface of the adjusting frame can be made to be a mirror surface through surface treatment; of course, the surface of the adjusting frame may be plated with a reflective layer, such as gold plating, chrome plating, or other reflective materials, which is not particularly limited by the present application.

Optionally, as shown in fig. 11 and fig. 12, the quality of the outgoing beam can be further improved by using at least three diaphragm structures 170 on the light outgoing side of the laser module, and in view of the characteristics that the diaphragm structures 170 can block part of the beam, in order to avoid that the diaphragm structures 170 have too high temperature due to light blocking, a second cooling passage 173 may be provided on the diaphragm structures 170, and a first cooling medium inlet/outlet 172 may be provided on the diaphragm structures 170, and the diaphragm structures 170 perform effective heat dissipation through the second cooling passage 173, so that the temperature of the diaphragm structures 170 themselves is maintained in a lower range. Therefore, by combining the heat dissipation mode of the embodiment, the temperature in the inner cavity can be further reduced, for example, the temperature in the inner cavity can be lower than 45 ℃, and the reliability of the product is improved.

Alternatively, as shown in fig. 11 and fig. 12, in order to further improve the quality of the outgoing beam, a light absorbing layer may be disposed on the surface of the diaphragm structure 170, or the surface of the diaphragm structure 170 may be configured to have a diffuse reflection function, so that stray light can be effectively absorbed, and the probability that the stray light may be irradiated to the adjusting frame or the mounting frame 134 is reduced. In some embodiments, the diaphragm structure 170 may be made of a material with good heat dissipation, such as aluminum, silver, and the like. In some embodiments, the light absorbing layer may be formed by sandblasting and black anodizing the surface of the diaphragm structure 170.

Alternatively, as shown in fig. 17 and 18, the sealed housing may include a main housing 230 and a lens holder 232 connected at ends, wherein a cavity of the main housing 230 and a cavity of the lens holder 232 may be communicated through the connected ends to form an inner cavity of the sealed housing, and the laser unit 100, the reflecting mirror 151, the diaphragm structure 170, and the optical shaping assembly 160 may be sequentially distributed in the inner cavity in a direction from the main housing 230 to the lens holder 232.

In order to facilitate the installation, the end of the main housing 230 facing away from the lens seat 232 may be provided with an opening and a rear sealing plate 231 sealing the opening, as shown in fig. 18 to 20, the end of the lens seat 232 facing away from the main housing 230 is provided with a first window 261 and a first light window 260 sealing the first window 261, so that the light beam 250 is easy to exit, and the first light window 260 arranged in the first window 261 can realize the sealing of the first window 261, so as to avoid the influence of moisture, dust and the like in the inner cavity.

Alternatively, as shown in fig. 19 and 20, an annular groove 262 is provided at the inner periphery of the first window 261, the outer periphery of the first optical window 260 is correspondingly inserted into the annular groove 262, and a sealing member 263 is further interposed between the first optical window 260 and the opposite side walls of the annular groove 262.

In order to seal the inner cavity well through the first optical window 260, an annular groove 262 which is convenient for the first optical window 260 to be inserted in is arranged at the inner periphery of the first window 261, so that the stability of the first optical window 260 is ensured, sealing elements 263 are also clamped between the opposite side walls of the first optical window 260 and the annular groove 262, and gaps between the inner side and the outer side of the first optical window 260 and the annular groove 262 are sealed by the sealing elements 263.

When the laser module is applied to the laser cladding system and in the working process of the laser cladding system, metal powder needs to be melted, the temperature of a molten pool is 1000 ℃, the temperature of the surrounding environment is high due to heat radiation, and the first optical window 260 is usually relatively close to the processing surface, so, in order to avoid the first optical window 260 from being burnt and damaged, as shown in fig. 19, a protection window is arranged on the outer side of the first optical window 260, namely, the protection window is fixedly arranged at the end part of the lens base 232, which faces away from the main shell 230, so that a double-window protection structure is formed, the protection window comprises a second optical window 222, a fixing plate 220 with a slot and an optical window frame 223 inserted into the slot, openings corresponding to positions are formed in the fixing plate 220 and the optical window frame 223, and the second optical window 222 is detachably arranged on the optical window frame 223, so that after the second optical window 222 is retracted into the slot along with the optical window frame 223, the openings can be correspondingly positioned at the positions of the openings, and at the moment, the first optical window 260 and the second optical window 222 correspond to the positions, and thus, the processing of at least three laser modules from the first optical window 260 and the second optical window 222 after the laser beams are sequentially inserted into the optical window 260 to the second optical window 222 is realized.

Because the second light window 222 is closer to the processing surface, the second light window 222 is easy to burn, belongs to a consumable, needs to be replaced frequently, and can be detachably connected with the light window frame 223 in order to improve the replacement efficiency. Therefore, the drawer structure is formed by the slots and the light window frames 223, when the light window frames 223 need to be replaced, the light window frames 223 can be pulled out first, then the second light window 222 is replaced and pushed in, and the replacement efficiency can be improved.

In some embodiments, the lens mount 232 may be provided with a fourth water cooling passage in the lens mount 232 in view of the lens mount 232 being closer to the machining surface, thereby reducing the temperature of the lens mount 232 by exchanging heat with the cooling medium flowing through the fourth cooling passage.

Alternatively, as shown in fig. 17, a third cooling passage is provided on the fixing plate 220 on the peripheral side of the second optical window 222, the third cooling passage having a second cooling medium inlet 221 so that the third cooling passage circulates a cooling medium. Since the end of the second optical window 222 is usually closer to the machining surface, the heat exchange of the cooling medium flowing through the third cooling passage can reduce the temperature around the second optical window 222, and prolong the replacement period of the second optical window 222.

In another aspect of the embodiments of the present application, a laser system, such as a laser cladding system, is provided, including any of the laser modules described above. The laser module can effectively reduce the temperature in the inner cavity of the laser system during working, and improve the heat radiation capacity of the laser cladding system, so that the laser system has longer continuous working time.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (17)

1. The utility model provides a laser module, its characterized in that includes the sealed housing that has the inner chamber and is located at least three laser module of inner chamber, at least three laser module is along horizontal direction space dislocation or along vertical direction space dislocation formation laser module, the laser beam that at least three laser module was emergent inserts and closes the beam back emergence, every all be provided with on the laser module and be used for circulating cooling medium's first cooling passageway.

2. The laser module of claim 1, further comprising a cooling line extending through the sealed housing to the interior cavity, the cooling line comprising a main line and a plurality of branch lines in communication, the plurality of branch lines in one-to-one communication with the first cooling passages of at least three of the laser modules, respectively, the main line having a cross-sectional area greater than or equal to a sum of the cross-sectional areas of the plurality of branch lines.

3. The laser module of claim 1, wherein each laser module comprises a base and at least two stacked lasers arranged on the base, and laser beams emitted by the at least two stacked lasers are inserted into a stitching beam to form laser beams emitted by the laser module.

4. A laser module as claimed in claim 3 wherein at least two of said stacked lasers are connected in series by electrodes, said electrodes being flexible electrodes having at least one bend.

5. The laser module of claim 3, wherein each of the laser modules further comprises a stripe combiner disposed on the base, and the at least two stacked lasers are distributed on opposite sides of the stripe combiner.

6. The laser module of claim 5, wherein each of the laser modules further comprises a mounting frame fixedly arranged on the base, the beam combiner is arranged on the base through the mounting frame, and the surface of the mounting frame is provided as a light reflecting surface.

7. The laser module of claim 1, wherein the at least three laser modules include at least two first-type laser modules and at least one second-type laser module, a reflecting mirror is disposed on a light emitting side of the first-type laser module, and a laser beam emitted by the first-type laser module is inserted into a laser beam emitted by the second-type laser module to be combined after being reflected by the reflecting mirror.

8. The laser module of claim 7, wherein an adjusting frame is disposed on the base of the first-class laser module, the reflecting mirror is fixedly disposed on the base of the first-class laser module through the adjusting frame, and a surface of the adjusting frame is configured as a light reflecting surface.

9. The laser module of claim 8, wherein the adjustment bracket is configured to adjust the attitude of the mirror.

10. The laser module of claim 1, wherein a diaphragm structure is provided on the light exit side of the at least three laser modules, and a second cooling channel for circulating a cooling medium is provided on the diaphragm structure.

11. The laser module of claim 10, wherein a light absorbing layer is provided on a surface of the diaphragm structure, or the surface of the diaphragm structure is provided as a structure having a diffuse reflection function.

12. The laser module of claim 1, wherein a first window and a first optical window closing the first window are provided on the sealing housing, and the laser beams of the at least three laser modules are emitted through the first optical window after being inserted into the hollow beam combination.

13. The laser module of claim 12, wherein an annular groove is provided at an inner periphery of the first window, an outer periphery of the first optical window is correspondingly inserted into the annular groove, and a sealing member is further interposed between the first optical window and opposite side walls of the annular groove.

14. The laser module of claim 12, further comprising a protection window fixedly disposed on the sealing housing and located outside the first optical window, wherein the protection window comprises a second optical window, a fixing plate with a slot, and an optical window frame inserted in the slot, and the second optical window is detachably mounted on the optical window frame, so that the laser beams of the at least three laser modules are sequentially emitted through the first optical window and the second optical window after being inserted into the empty beam.

15. The laser module of claim 14, wherein a third cooling passage for circulating a cooling medium is provided on the fixing plate on a peripheral side of the second optical window.

16. The laser module of claim 1, wherein adjacent two of the laser modules are detachably connected.

17. A laser system comprising a laser module as claimed in any one of claims 1 to 16.