CN220628477U

CN220628477U - Optical fiber laser

Info

Publication number: CN220628477U
Application number: CN202322208371.6U
Authority: CN
Inventors: 曹柏林; 杨宣; 刘英杰
Original assignee: BWT Beijing Ltd
Current assignee: BWT Beijing Ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2024-03-19
Anticipated expiration: 2033-08-16

Abstract

The utility model proposes a fiber laser comprising: the cooling device comprises a cooling plate, a driving power supply and at least two pumping sources, wherein the two pumping sources and the driving power supply are arranged side by side along the Y-axis direction of the cooling plate, the length extending direction of the two pumping sources and the length extending direction of the driving power supply are identical to the X-axis direction of the cooling plate, the driving plate is vertically arranged along the Z-axis direction of the cooling plate, and the length extending direction of the driving plate is identical to the Y-axis direction of the cooling plate. According to the method, the space utilization rate of different mounting surfaces of the cooling plate is improved by optimizing the shape and the size of the components in the laser and reasonably arranging the mounting positions of the components; through the mode of designing the drive plate into the staggered special-shaped structure of height and vertical installation, the installation space is saved, the wiring between the drive power supply and the pumping source is convenient for, the electromagnetic compatibility is improved, and the technical effect of minimizing the volume of the laser is achieved. The method is mainly suitable for 3KW lasers.

Description

Optical fiber laser

Technical Field

The application relates to the technical field of lasers, in particular to an optical fiber laser.

Background

Fiber Lasers (Fiber Lasers) are Lasers using rare earth doped glass fibers as gain media, which require multiple pump sources to generate pump light and under the action of the pump light "population inversion" of the laser energy level of the laser working substance to generate a coherent laser beam. The larger the output power of the fiber laser is, the larger the required pump light power is, and the cooling is generally realized by adopting a mode of communicating circulating cooling water for the high-power fiber laser.

However, in the related art, as the power of the fiber laser increases, the number and volume of various devices therein increases, and thus it is necessary to install the required devices and to achieve heat dissipation by increasing the size of the cooling plate, which undoubtedly increases the size of the fiber laser; meanwhile, the shape, the size and the installation position of various devices in the existing laser are unreasonable in design, so that the size of the laser is further increased, the installation difficulty of the fiber laser is increased, and the manufacturing cost and the transportation cost are improved.

Disclosure of Invention

Aiming at the problems, the application discloses an optical fiber laser so as to achieve the technical effects of reasonably arranging and optimizing the installation space of various devices in the optical fiber laser on the basis of ensuring the performance of the optical fiber laser, reducing the size and the weight of the optical fiber laser and further reducing the manufacturing and transportation cost.

To achieve the above object, the present application provides a fiber laser including: the cooling plate, the driving power supply and at least two pumping sources are arranged on the first surface of the cooling plate,

wherein the at least two pumping sources and the driving power supply are arranged side by side along the Y-axis direction of the cooling plate, the length extension direction of the at least two pumping sources and the length extension direction of the driving power supply are the same as the X-axis direction of the cooling plate,

the driving plate is vertically arranged along the Z-axis direction of the cooling plate, and the length extension direction of the driving plate is consistent with the Y-axis direction of the cooling plate.

Further, the driving power supply adopts a single 9KW power supply, the width of the driving power supply is not more than 185mm, the length of the driving power supply is not more than 350mm, and the height of the driving power supply is not more than 48mm.

Further, the cooling plate includes a first long side, a first wide side adjacent to the first long side,

one side of one of the two pump sources is arranged in an abutting mode with the first long side of the cooling plate, and the other side of the one pump source is arranged in an abutting mode with the other pump source of the two pump sources;

the one end of two pumping sources, which is close to the first broadside, the driving power supply and the shell of the fiber laser can be enclosed to form an accommodating space, and the driving plate is vertically arranged in the accommodating space.

Further, pump source electrode columns are arranged at the end parts of the two pump sources, driving plate electrode columns are arranged on the driving plate, and the two pump sources are connected with the driving plate through the pump source electrode columns and the driving plate electrode columns.

Further, the upper end of the driving plate is provided with a special-shaped structure with staggered height.

Further, the method further comprises the following steps: a first type power device and a second type power device mounted on the same side of the driving plate, the first type power device and the second type power device being mounted at different heights of the driving plate from the second surface of the cooling plate, wherein Y coordinate values of the mounting positions of the first type power device and the second type power device are different,

the first type of power device at least comprises an MOS tube, and the second type of power device at least comprises a power resistor.

Further, the method further comprises the following steps: a third type of electronic device mounted on the other side of the drive board, the third type of electronic device including at least a capacitor,

the difference of X coordinate values of the mounting positions of the first type of power devices and the third type of electronic devices is the thickness of the driving plate.

Further, an insulating pad is arranged on a first mounting surface, which is contacted with the bottom of the first type power device and the first surface of the cooling plate,

the second mounting surface of the bottom of the second type power device and the third mounting surface of the bottom of the driving plate are different in height from the second surface of the cooling plate.

Further, the height of the cooling plate at the contact position of the bottom of the driving plate and the first surface of the cooling plate is lower than the height of the cooling plate at the contact position of the bottom of the power resistor and the first surface of the cooling plate.

Further, the method further comprises the following steps: active optical fiber, high-reflection grating, low-reflection grating, CPS optical fiber cladding power stripper and pump beam combiner,

the active optical fiber, the high-reflection grating, the low-reflection grating, the CPS optical fiber cladding power stripper and the pump beam combiner are all arranged on the second surface of the cooling plate,

wherein the second surface is an opposite side of the first surface of the cooling plate and the first surface is of a uniform size to the second surface.

Further, a water channel for circulating cooling liquid is arranged in the cooling plate, and cooling liquid with preset pressure, preset flow and preset temperature is introduced into a water inlet of the cooling plate, so that heat dissipation of any one or more devices of the two pump sources, the driving plate and the driving power supply on the first surface of the cooling plate, and the active optical fiber, the high-reflection grating, the low-reflection grating, the CPS optical fiber cladding power stripper and the pump beam combiner on the second surface of the cooling plate is realized.

The application has the advantages that: the optical fiber laser reduces the overall size and weight of the optical fiber laser by optimizing the shapes and the sizes of various devices such as a pumping source, a driving plate, a driving power supply, a cooling plate and the like in the optical fiber laser and reasonably arranging the mounting positions of the various devices; secondly, through the arrangement of the electrode columns, the electric connection between the two pumping sources and the driving plate is realized, the wiring space is saved, and the connection length can be shortened to improve the electromagnetic compatibility; thirdly, by designing the driving plate into a three-dimensional structure with staggered heights and in a vertical installation mode, the installation space is further saved, and wiring between the driving power supply and the pumping source is facilitated; the mounting heights of the two types of power devices on the driving plate are different, so that the MOS tube and the power resistor are mounted on the same plane of the cooling plate, and the mounting of the pins of the power devices can be realized without bending into a Z shape, thereby saving the mounting time and cost; finally, the installation space of the pumping source, the driving plate, the driving power supply and other devices on the first surface of the cooling plate is optimized, the installation space of various light path devices on the second surface of the cooling plate is optimized, the space utilization rate of different installation surfaces of the laser cooling plate is improved, and meanwhile, the heat dissipation effect of the double-sided devices on the laser cooling plate is guaranteed through the water channels arranged in the cooling plate. Therefore, the method and the device achieve the technical effect of minimizing the size of the laser on the basis of ensuring the performance of the fiber laser, and have higher economic and practical values. The method is mainly suitable for the 3KW fiber laser.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is one of the schematic structural diagrams of a fiber laser in one embodiment of the present application;

FIG. 2 is a second schematic diagram of a fiber laser according to one embodiment of the present disclosure;

FIG. 3 is a front view of a drive plate in one embodiment of the present application;

FIG. 4 is a top view of a drive plate in one embodiment of the present application;

FIG. 5 is a cross-sectional view of a mounting of a power device on a drive board in one embodiment of the present application;

FIG. 6 is a partial schematic view of a drive plate and electrode column of a pump source in one embodiment of the present application;

FIG. 7 is a schematic view of the structure of the optical surface of a cooling plate in one embodiment of the present application;

fig. 8 is a schematic view of a water channel provided inside a cooling plate in one embodiment of the present application.

In the figure: 101. a cooling plate; 102. a pump source; 103. a driving plate; 104. a driving power supply; 105. a control board; 106. tail fiber; 107. a MOS tube; 108. a power resistor; 109. a capacitor; 110. pumping the source electrode column; 111. driving the plate electrode column; 112. a pump combiner; 113. an active optical fiber; 114. a low reflection grating; 115. a high reflection grating; 116. CPS optical fiber cladding power stripper; s denotes a welding region between two electrode columns.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

In one embodiment of the present application, as shown in fig. 1, a fiber laser is proposed, including: a cooling plate 101, a driving plate 103, a driving power supply 104, and at least two pump sources 102, the driving plate 103, the driving power supply 104 being mounted on a first surface of the cooling plate 101.

The at least two pump sources 102 and the driving power source 104 are arranged side by side along the Y-axis direction of the cooling plate 101, and the length extension direction of the at least two pump sources 102 and the length extension direction of the driving power source 104 are the same as the X-axis direction of the cooling plate 101; the driving plate 103 is vertically installed along the Z-axis direction of the cooling plate 101, and the length extension direction of the driving plate 103 coincides with the Y-axis direction of the cooling plate 101.

In the present embodiment, the longitudinal extending direction of the cooling plate is defined as the X-axis direction, the width extending direction of the cooling plate is defined as the Y-axis direction, and the height (thickness) extending direction of the cooling plate is defined as the Z-axis direction.

In order to utilize the existing cooling plate aluminum profile stretching die (with the width of 350 mm), the space occupied by a pumping source is minimized; more importantly, the maximum output power of a single pump source needs to be considered, so that the embodiment of the application adopts a structure with 2 pump sources, thereby not only meeting the requirement of output power, but also enabling the overall length of the fiber laser to be 400mm, the overall width to be 360mm and the height to be 80mm.

Further, since the driving board 103 provides electric driving for the two pump sources 102, it generates great energy consumption, so the power devices on the driving board 103 need to be mounted on the cooling board, and meanwhile, the wiring between the driving power source 104 and the pump sources 102 needs to be shortened as much as possible to improve the EMC (Electromagnetic Compatibility ) of the whole system, so the driving board 103 is mounted in the accommodating space formed by the pump sources 102 and the driving power source 104.

As shown in fig. 1, the cooling plate 101 includes a first long side, and a first wide side (not labeled in the figure) adjacent to the first long side, one side of one of the two pump sources 102 (left pump source) is disposed against the first long side of the cooling plate 101, and the other side of the one pump source (left pump source) is disposed against the other pump source (right pump source) of the two pump sources; in other words, in fig. 1, the pump source located on the left side is close to one long side of the cooling plate, the other pump source located on the right side is parallel to the left pump source, the driving power source is parallel to the right pump source, and the pump sources and the driving power source are arranged along the extending direction of the broad side of the cooling plate;

meanwhile, one end of the two pump sources 102, which is close to the first broad side, the first broad side of the cooling plate 101, the driving power source 104, and the laser housing disposed outside the cooling plate can enclose to form an accommodating space, and the driving plate 103 is vertically installed in the accommodating space. In addition, the fiber laser further includes a control board 105, and the control board 105 is disposed outside an edge of one of the broad sides (first broad side) of the cooling board 101; the two pump sources 102 are also connected with tail fibers 106, and the tail fibers 106 pass through the through grooves on the cooling plate 101, are wound from the first surface to the second surface of the cooling plate, and are connected into the pump beam combiner for welding.

Therefore, the shape and the size of various devices such as a pumping source, a driving plate, a driving power supply, a cooling plate and the like in the fiber laser are optimized, the overall size and the weight of the fiber laser are reduced, and meanwhile, the arrangement mode adopted by the embodiment of the application enables the installation positions of various devices on the first surface of the cooling plate to be more compact, and the space utilization rate of the surface of the cooling plate is improved.

It is worth noting that the application is mainly applicable to 3KW lasers, and of course, the related content related to the technical scheme of the application can be popularized to other types of lasers or related products.

Preferably, in the embodiment of the present application, as shown in fig. 1 and 2, the driving power supply 104 uses a single 9KW power supply, the width of the driving power supply 104 is not more than 185mm, the length of the driving power supply 104 is not more than 350mm, and the height of the driving power supply 104 is not more than 48mm. Meanwhile, in order to further reduce the volume of the laser, a control power supply is also integrated inside the driving power supply 104 in this embodiment.

Further, as shown in fig. 3 and fig. 4, in order to leave a wiring space for connection between the driving power source 104 and the driving board 103, and between the two pump sources 102 and the driving power source 104, the upper end of the driving board 103 is configured in a staggered profile structure. The height of the driving plate 103 in the vertical direction along the Z axis ranges from 35mm to 44mm, the overall length of the driving plate is 143mm, and the length of the lower region is 100mm.

Further, the power devices in the present embodiment can be classified into two types: i.e. a first type of power device and a second type of power device, which are required to be mounted on the same side of the driving plate, respectively, the first type of power device and the second type of power device being mounted at different heights of the driving plate from the second surface of the cooling plate, wherein the Y-coordinate values of the mounting positions of the first type of power device and the second type of power device are different.

Specifically, as shown in fig. 4, the first type of power device includes at least a MOS transistor 107 (power amplifying device), and the second type of power device includes at least a power resistor 108 (for measuring a large current). In addition, in the present embodiment, a third type of electronic device is further included and mounted on the other side of the driving board, the third type of electronic device includes at least a capacitor 109, and a difference between X coordinate values of the mounting positions of the first type of power device and the third type of electronic device is the thickness of the driving board. It will be understood that the X-coordinate value and the Y-coordinate value refer to coordinate values in a rectangular coordinate system formed by the X-axis direction, the Y-axis direction and the Z-axis direction defined above.

Because the bottom surface of the first-type power device MOS tube 107 is charged and needs to be electrically insulated from the cooling plate 101 to avoid a short circuit, in this embodiment of the present application, an insulating pad (such as an aluminum nitride pad) is disposed at a first mounting surface where the bottom of the first-type power device (MOS tube) contacts the first surface of the cooling plate, and both sides of the insulating pad are coated with heat-conducting silicone grease to reduce thermal resistance.

Also, since the outer shell of the power resistor 108 of the second type of power device is uncharged, no electric insulation pad is needed between the power resistor 108 and the cooling plate 101, and only the bottom of the power resistor is required to be coated with heat-conducting silicone grease. This results in different distances between the pins of MOS transistor 107 and cooling plate 101 and between the pins of power resistor 108 and cooling plate 101. Therefore, in the present application, the above-described problem is solved by vertically soldering the MOS transistor 107 and the power resistor 108 at different heights of the driving board.

That is, in this embodiment, the mounting height of the MOS transistor 107 on the driving board 103 is different from the mounting height of the power resistor 108 on the driving board 103, so that the combination of the MOS transistor and the insulating pad, and the power resistor can be on the same plane of the cooling board to achieve heat dissipation.

Meanwhile, in this embodiment, the second mounting surface of the bottom of the second type power device and the third mounting surface of the bottom of the driving board are different in height from the second surface of the cooling board. In other words, the height of the cooling plate at the contact position of the bottom of the driving plate 103 and the first surface of the cooling plate 101 is lower than the height of the cooling plate at the contact position of the bottom of the power resistor 108 and the first surface of the cooling plate 101, and the contact area of the driving plate and the first surface of the cooling plate, and the contact area of the power resistor and the first surface of the cooling plate are different from the height of the second surface of the cooling plate.

Preferably, as shown in fig. 5, the height of the contact area of the cooling plate 101 with the driving plate 103 may be lowered by 3.3mm with respect to the height of the contact area of the cooling plate 101 with the power resistor 108, that is, the driving plate mounting area on the cooling plate may be milled out of aluminum material having a thickness of 3.3mm with respect to the mounting area of the power resistor on the cooling plate. Therefore, a large number of power device pins are not required to be bent into a Z shape, the MOS tube and the power resistor can be directly welded on the driving plate and are clung to the same plane of the cooling plate to realize installation, so that the installation space and the installation time are reduced, and the material cost is saved.

Further, since the wires generally used for connecting the driving plate 103 and the pump source 102 are thicker (10 mm ² ) And a large bending radius is required, two pump sources 102 and a driving plate 103 are connected through an electrode column in this embodiment. Specifically, as shown in fig. 6, the ends of the two pump sources 102 (the end near the driving plate) are provided with two pump source electrode columns 110, the driving plate 103 (the side near the pump source) is provided with two driving plate electrode columns 111, and the two pump sources 102 and the driving plate 103 pass throughThe pump source electrode column 110 is connected to the drive plate electrode column 111. Meanwhile, it is understood that in the present embodiment, the two pump sources 102 also need to be connected to the driving power source 104, and the driving power source 104 is connected to the driving board 103.

In addition, the mounting heights and orientations of the driving plate electrode column 111 and the pumping source electrode column 110 are required to be set correspondingly, and the distance between the driving plate electrode column 111 and the pumping source electrode column 110 is about 1mm, and the alignment accuracy and the positioning accuracy are within the sum range of the machining tolerance and the mounting tolerance, so that the two electrode columns can be automatically welded together by using a manipulator (S represents the welding area between the two electrode columns), no additional wiring is required, and the routing length can be shortened to improve the electromagnetic compatibility.

Of course, the polarity, number, mounting locations, etc. of the pump source electrode columns and the drive plate electrode columns described herein are merely exemplary descriptions and should not be construed as limiting the present application.

Further, in the embodiment of the present application, the cooling plate includes not only the first surface but also a second surface (optical surface) opposite to the first surface, and the second surface may be used for mounting the optical path components.

In one embodiment of the present application, as shown in fig. 7, the fiber laser further includes: pump combiner 112, active fiber 113, low reflection grating 114, high reflection grating 115, CPS fiber cladding power stripper 116,

the pump combiner 112, the active optical fiber 113, the low reflection grating 114, the high reflection grating 115, and the CPS fiber cladding power stripper 116 are all disposed on the second surface of the cooling plate, wherein the first surface and the second surface are in the same size.

It should be noted that, in this embodiment of the present application, the first surface of the cooling plate is used to mount components such as a pump source, a driving plate, a driving power source (as shown in fig. 1 and 2), and the second surface of the cooling plate is opposite to the first surface and is used to mount optical path devices such as an active optical fiber, a pump combiner, etc. (as shown in fig. 7), where the first surface and the second surface should be understood as upper and lower external surfaces of the cooling plate as a whole, rather than internal surfaces in the interlayer of the cooling plate.

It can be seen that, in this embodiment, while optimizing the installation space of the pump source, the driving board, the driving power source, and the like on the first surface of the cooling board, the installation space of the optical path device on the second surface of the cooling board is also optimized, so that it is ensured that all the optical path devices can be reasonably installed on the second surface with the same size as the first surface, and the heights of the optical path devices must be as low as possible, so that the volume of the fiber laser is minimized.

Further, as shown in fig. 8, a water channel for circulating the cooling liquid is provided inside the cooling plate, and the water channel may be configured as a plurality of branched flow channels which are uniformly branched. It will be appreciated that the double-layered dashed box represents a water channel, the arrows in the water channel represent the direction of flow of the cooling fluid, and that mounting slots (to avoid the water channel) may also be provided on the cooling plate. Of course, the shape, number, etc. of waterways shown in fig. 8 of the present application should not be construed as limiting the present application.

In this embodiment, the cooling liquid with preset pressure, preset flow and preset temperature is introduced into the water inlet of the cooling plate, so that heat dissipation of any one or more devices of the two pump sources, the driving plate, the driving power supply on the first surface of the cooling plate, and the active optical fiber, the high-reflection grating, the low-reflection grating, the CPS optical fiber cladding power stripper and the pump beam combiner on the second surface of the cooling plate can be achieved.

In summary, the present embodiment proposes a fiber laser, and first, by optimizing the shapes and sizes of various devices such as a pump source, a driving board, a driving power source, a cooling board, and the like in the fiber laser, and reasonably arranging the mounting positions of the various devices, the overall size and weight of the fiber laser are reduced; secondly, through the arrangement of the electrode columns, the electric connection between the two pumping sources and the driving plate is realized, the wiring space is saved, and the connection length can be shortened to improve the electromagnetic compatibility; thirdly, by designing the driving plate into a three-dimensional structure with staggered heights and in a vertical installation mode, the installation space is further saved, and wiring between the driving power supply and the pumping source is facilitated; the mounting heights of the two types of power devices on the driving plate are different, so that the MOS tube and the power resistor are mounted on the same plane of the cooling plate, and the mounting of the pins of the power devices can be realized without bending into a Z shape, thereby saving the mounting time and cost; finally, the installation space of the pumping source, the driving plate, the driving power supply and other devices on the first surface of the cooling plate is optimized, the installation space of various light path devices on the second surface of the cooling plate is optimized, the space utilization rate of different installation surfaces of the laser cooling plate is improved, and meanwhile, the heat dissipation effect of the double-sided devices on the laser cooling plate is guaranteed through the water channels arranged in the cooling plate. Therefore, the method and the device achieve the technical effect of minimizing the size of the laser on the basis of ensuring the performance of the fiber laser, and have higher economic and practical values. The method is mainly suitable for the 3KW fiber laser.

It should be noted that, in the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is two or more.

In the present utility model, unless explicitly specified and limited otherwise, terms such as "connected," "fixed" and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely a specific embodiment of the utility model and other modifications and variations can be made by those skilled in the art in light of the above teachings. It is to be understood by persons skilled in the art that the foregoing detailed description is provided for the purpose of illustrating the utility model more fully, and that the scope of the utility model is defined by the appended claims.

Claims

1. A fiber laser, comprising: the cooling plate, the driving power supply and at least two pumping sources are arranged on the first surface of the cooling plate,

2. The fiber laser of claim 1, wherein the drive power source is a single 9KW power source, the width of the drive power source is no more than 185mm, the length of the drive power source is no more than 350mm, and the height of the drive power source is no more than 48mm.

3. The fiber laser of claim 1, wherein the cooling plate includes a first long side and a first broad side adjacent to the first long side,

4. The fiber laser of claim 1, wherein pump source electrode posts are disposed at ends of the two pump sources, and a drive plate electrode post is disposed on the drive plate, and the two pump sources are connected to the drive plate through the pump source electrode post and the drive plate electrode post.

5. The fiber laser of claim 1, wherein the upper end of the drive plate is configured in a staggered profile.

6. The fiber laser of claim 5, further comprising: a first type power device and a second type power device mounted on the same side of the driving plate, the first type power device and the second type power device being mounted at different heights of the driving plate from the second surface of the cooling plate, wherein Y coordinate values of the mounting positions of the first type power device and the second type power device are different,

7. The fiber laser of claim 6, further comprising: a third type of electronic device mounted on the other side of the drive board, the third type of electronic device including at least a capacitor,

8. The fiber laser of claim 6, wherein an insulating pad is disposed on a first mounting surface of the bottom of the first type of power device in contact with the first surface of the cooling plate,

9. The fiber laser of claim 1, further comprising: active optical fiber, high-reflection grating, low-reflection grating, CPS optical fiber cladding power stripper and pump beam combiner,

10. The fiber laser of claim 9, wherein a water channel for circulating a cooling liquid is provided inside the cooling plate, and the cooling liquid with preset pressure, preset flow rate and preset temperature is introduced into the water inlet of the cooling plate, so as to realize heat dissipation of any one or more of the two pump sources, the driving plate and the driving power supply on the first surface of the cooling plate, and the active fiber, the high-reflection grating, the low-reflection grating, the CPS fiber cladding power stripper and the pump combiner on the second surface of the cooling plate.