An optical fiber laser

Abstract

The present invention discloses a fiber laser, which includes a pump source, a drive power supply, a control power supply, a drive board and a heat dissipation board; the drive power supply, the control power supply and the drive board are located on the side of the heat dissipation board where the pump source is provided; by placing devices with a height similar to that of the pump source on one side of the heat dissipation board, the height of the fiber laser on this side can be reduced; multiple pump sources are arranged in a staggered manner in the head-to-tail direction, are respectively located on both sides of the heat dissipation board and are connected; the head of the pump source is located between its adjacent pump sources; the drive power supply is arranged in parallel with the pump source to reduce the area of the heat dissipation board, and the passive optical fiber is coiled above the pump source, so that there is no need to additionally provide a coiling space for the passive optical fiber, further reducing the volume of the fiber laser, reducing the requirement of the fiber laser for the installation space volume, expanding the application field of the fiber laser, and moreover reducing the weight of the heat dissipation board, achieving the technical effect of reducing the volume of the fiber laser.

Description

Technical Field

[0001] The present invention belongs to the technical field of lasers, and particularly relates to an optical fiber laser. Background Art

[0002] An optical fiber laser mainly consists of components such as a pump source, a beam combiner, a fiber grating, an active optical fiber, a passive optical fiber, a film stripper, laser control, a laser driver, and a laser output head. Optical fiber lasers have a wide range of applications in technical fields such as industrial processing, communication, military national defense security, and medical device instruments.

[0003] As the required power of the optical fiber laser increases, the power of the pump source needed is greater. Correspondingly, the number of each device inside the optical fiber laser also increases. By increasing the length and width dimensions of the cooling device to install the increased devices, this not only increases the volume of the optical fiber laser but also raises the limitation on the installation space of the optical fiber laser, resulting in an increase in the installation difficulty of the optical fiber laser and restricting the application fields of the optical fiber laser. Moreover, the increase in the number of devices and the size of the cooling device also increases the manufacturing cost and transportation cost of the optical fiber laser. Summary of the Invention

[0004] In view of the above problems, the present invention discloses an optical fiber laser to overcome or at least partially solve the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An optical fiber laser, comprising a pump source, a drive power supply, a control power supply, a drive board, and a heat dissipation board; the pump source, the drive power supply, the control power supply, and the drive board are located on one side of the heat dissipation board and are connected;

[0007] The length direction of the drive power supply is arranged in parallel with the length direction of the pump source, and the drive board is located between the drive power supply and the pump source;

[0008] Wherein, the length of the drive power supply is L1, the width of the control power supply is L2, and the length of the pump source is L3; when L1 + L2 - L3 ≤ the first distance, the drive power supply and the control power supply are located on the same straight line, and the length direction of the drive power supply and the width direction of the control power supply are arranged in sequence along the length direction of the pump source, and the length direction of the drive board is arranged along the length direction of the pump source;

[0009] When L1 + L2 - L3 > the first distance, the control power supply is located between the drive power supply and the pump source and is on the same straight line as the drive board, and the control power supply and the drive board are respectively arranged along the length direction of the pump source.

[0010] Optionally, a plurality of the pump sources are provided and divided into two rows, and the two rows of the pump sources are arranged in parallel and staggered.

[0011] Optionally, when L1 + L2 - L3 > the first distance, the sum of the lengths of the control power supply and the drive board is not greater than the length of the pump source.

[0012] Optionally, the length directions of the control power supply and the drive board are respectively arranged along the length direction of the pump source.

[0013] Optionally, the fiber laser further includes a secondary heat dissipation plate; the secondary heat dissipation plate is located between the pump source and the heat dissipation plate, and has the same length and width dimensions as the pump source.

[0014] Optionally, the fiber laser further includes a partition board and a passive optical fiber; the upper part of the pump source is connected to the partition board, one side of the partition board is connected to the heat dissipation plate, and the other side of the partition board is used to place and fix the passive optical fiber; the passive optical fiber is connected to the pump source and is used for the transmission of pump light.

[0015] Optionally, a plurality of protrusions are provided on one side of the partition board where the passive optical fiber is placed.

[0016] Optionally, the passive optical fiber is coiled in an "S" shape.

[0017] Optionally, the fiber laser further includes a handle; the handle is located on the front panel and / or the rear panel of the housing of the fiber laser.

[0018] Optionally, the fiber laser further includes a control board; the control board is provided with an external connection port and a signal lamp, the control board is located outside the housing, and is located on the side where the handle is provided, and is communicated with the inside of the housing.

[0019] The advantages and beneficial effects of the present invention are:

[0020] In the fiber laser of the present invention, by providing a pump source, a heat dissipation plate, a drive board, a drive power supply and a control power supply; and by making the drive board, the drive power supply and the control power supply respectively have heights similar to that of the pump source, and placing the drive board, the drive power supply and the control power supply on the side of the heat dissipation plate where the pump source is provided, the height of the fiber laser on this side can be reduced, thereby reducing the height of the fiber laser, and further reducing the volume of the fiber laser. At the same time, by adjusting the positions of the drive board, the drive power supply and the control power supply, the compactness of the internal structure of the fiber laser can be improved, thereby reducing the area of the heat dissipation plate, and further reducing the volume of the fiber laser, achieving the technical effects of reducing the manufacturing cost and transportation cost of the fiber laser, and reducing the volume requirement of the fiber laser for the installation space, so as to expand the application field of the fiber laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Also, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the fiber laser according to the first embodiment of the present invention;

[0023] Figure 2 is Figure 1 the front view of the fiber laser in

[0024] Figure 3 is a schematic structural diagram between the housing and the handle in the fiber laser according to the first embodiment of the present invention;

[0025] Figure 4 is a schematic structural diagram between the mounting box and the housing in the fiber laser according to the first embodiment of the present invention;

[0026] Figure 5 is a schematic structural diagram of the fiber laser according to the second embodiment of the present invention;

[0027] Figure 6 is a cross-sectional view of the heat dissipation plate in the fiber laser according to the second embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of the fiber laser according to the third embodiment of the present invention;

[0029] Figure 8 is a comparison diagram of the weight and size between the laser of model YLR-U-K produced by IPG Photonics Corporation and the fiber laser with a power of 3KW in an embodiment of the present invention;

[0030] Figure 9 is a comparison diagram of the weight and size between the laser of model YLR-U-K produced by IPG Photonics Corporation and the fiber laser with a power of 6KW in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions and effects of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] The following will describe in detail the technical solutions provided by each embodiment of the present invention in conjunction with the accompanying drawings.

[0033] Embodiment 1

[0034] In conjunction with Figures 1 to 4 As shown, this embodiment discloses a fiber laser, which includes a pump source 1, a passive fiber, a heat dissipation plate 2, a drive board 6, a drive power supply 71, and a control power supply 72. The drive power supply 71, the control power supply 72, and the drive board 6 are located on one side of the heat dissipation plate 2 and are connected, and the pump source 1 is also provided on this side of the heat dissipation plate 2. The length direction of the drive power supply 71 is arranged in parallel with the length direction of the pump source 1. The drive board 6 is located between the drive power supply 71 and the pump source 1, and the heat dissipation plate 2 is a water-cooled plate, so that the drive board is close to the water inlet hole of the heat dissipation plate, thereby improving the heat dissipation effect of the drive board to ensure the normal operation of the drive board.

[0035] In this embodiment, there are multiple pump sources, and the multiple pump sources are arranged on both sides of the heat dissipation plate and are connected. The multiple pump sources located on the same side of the heat dissipation plate are respectively arranged in two rows. Among them, connectors for connecting the passive fiber and connectors for connecting wires are respectively provided at both ends of the pump source. The connectors for connecting the passive fiber between the two rows of pump sources face in opposite directions, while the connectors for connecting the passive fiber in the same row of pump sources face in the same direction; the two rows of pump sources are respectively arranged in parallel and staggered, that is, the pump sources adjacent to a pump source on the left and right are pump sources in the adjacent row, and the connector for connecting the passive fiber in this pump source is located in the space between the pump sources adjacent to the left and right.

[0036] Furthermore, in this embodiment, the length of the drive power supply 71 is L1, the width of the control power supply 72 is L2, and the length formed by the multiple pump sources on the same side of the heat dissipation plate 2 is taken as the length of the pump source as L3, and L1 + L2 - L3 is greater than the first distance. At this time, the control power supply 72 is located between the drive power supply 71 and the pump source 1, and the control power supply 72 and the drive board 6 are on the same straight line. At the same time, the control power supply 72 and the drive board 6 are arranged along the length direction formed by the multiple pump sources, that is, the direction of L3. Among them, the first distance is 3 cm.

[0037] In this embodiment, by setting multiple pump sources, a heat dissipation plate, a drive board, a drive power supply, and a control power supply; using the fact that the drive board, the drive power supply, and the control power supply are respectively similar in height to the pump source, and placing the drive board, the drive power supply, and the control power supply on the side of the heat dissipation plate where the pump source is provided, the height of the fiber laser on this side can be reduced, thereby reducing the height of the fiber laser. At the same time, by arranging the length direction of the drive power supply in parallel with the length direction L3 formed by the multiple pump sources, cooperating with the control power supply and the drive board being arranged on the same straight line direction and respectively along the length direction formed by the multiple pump sources, the compactness of the structure can be improved, achieving the purpose of reducing the area of the heat dissipation plate, and thus reducing the volume of the fiber laser.

[0038] Furthermore, by placing multiple pump sources on both sides of the heat sink plate respectively, it is possible to avoid the increase in the length and width dimensions of the heat sink plate caused by setting multiple pump sources on one side of the heat sink plate, so as to reduce the area of the heat sink plate and its weight, thereby saving the manufacturing cost and transportation cost of the fiber laser. By arranging two rows of pump sources in parallel and staggered, the size of L3 can be reduced, thereby reducing the area of the heat sink plate, achieving the effect of reducing the manufacturing cost and transportation cost of the fiber laser. Moreover, the joints connecting the passive optical fibers between the two rows of pump sources face in opposite directions, while the joints connecting the passive optical fibers in the same row of pump sources face in the same direction. The distance between two pump sources can be used as the connection path between adjacent rows of pump sources and the passive optical fibers. Then, the joints of the connecting wires of each pump source are arranged towards the housing of the fiber laser. By using the distance between the joints of the connecting wires and the housing, the connection between the pump source and the wire can be realized, without the need to additionally set up a connection space, thereby improving the compactness of the components in the fiber laser and avoiding the spatial interference between the wires and the passive optical fibers in adjacent pump sources, which increases the size of the fiber laser, and further achieving the purpose of reducing the volume of the fiber laser.

[0039] Preferably, the sum of the lengths of the control power supply 72 and the drive board 6 is not greater than the length L3 composed of multiple pump sources. In this way, the setting length of the heat sink plate along the L3 direction can be reduced, thereby achieving the technical effect of reducing the area of the heat sink plate.

[0040] Furthermore, in this embodiment, the length directions of the control power supply and the drive board are respectively arranged along the length direction composed of multiple pump sources. In this way, along the direction perpendicular to L3 in the heat sink plate, the heat sink plate only needs to provide the larger dimension of the width capable of accommodating the control power supply and the width of the drive board. This setting method can reduce the dimension of the heat sink plate in the direction perpendicular to L3, so as to achieve the technical effect of further reducing the area of the heat sink plate.

[0041] Combined with Figure 3 As shown, in this embodiment, the fiber laser further includes a handle 4. The handle 4 is located at the front panel position of the housing 3 of the fiber laser. Of course, it can also be set at the rear panel. Since both the front panel and the rear panel in the housing 3 are thinner than the left panel and the right panel, setting the handle here can further achieve the effect of reducing the size of the fiber laser.

[0042] Of course, in other embodiments, in order to improve the convenience of moving the fiber laser, handles can also be respectively set on the front panel and the rear panel of the housing.

[0043] Preferably, the fiber laser further includes a control board. The control board is provided with an external connection port and a signal lamp. The control board is located outside the housing and on the side where the handle 4 is provided. Specifically, an installation groove is provided on the housing 3. One end of the control board is embedded in the installation groove, and the other end passes through the installation groove and is located outside the housing, thereby reducing the number of wire harnesses inside the housing. In this way, there is no need to set up wiring space to achieve the purpose of reducing the volume of the fiber laser; and setting the control board on the outside of the housing can avoid setting it inside the housing and increasing the volume of the fiber laser. At the same time, the control board can be repaired without opening the housing, thereby improving the simplicity of repairing and replacing the control board. And by setting the control board and the handle on one side, the space utilization rate outside the housing can be improved, thereby achieving the effect of improving the space utilization rate occupied by the fiber laser.

[0044] Combined with Figure 4 As shown, in this embodiment, the fiber laser further includes an installation box 5. The installation box 5 is detachably connected to the housing 3 by bolts. The control board is located inside the installation box 5. The installation box 5 can protect the control board, and the detachable connection between the installation box and the housing can improve the simplicity of repairing the control board.

[0045] Preferably, the fiber laser further includes a partition. The partition is located between the pump source and the top plate of the housing. The bottom end of the partition is detachably fixed to the heat dissipation plate 2 by bolts. The top end of the partition is used to place and fix the coiled passive optical fiber. In this way, there is no need to additionally set up a coiling space inside the housing, thereby achieving the effect of reducing the volume of the fiber laser.

[0046] Furthermore, preferably, the top end of the partition is provided with a plurality of protrusions. By using the protrusions to support between the pump source and the top plate of the housing, space can be provided for the coiling of the passive optical fiber, avoiding the passive optical fiber from being unable to work properly due to the pressure of the housing, thereby ensuring the integrity and effectiveness of the passive optical fiber.

[0047] In addition, preferably, bolts are used as the protrusions on the partition. Specifically, the bolt head is located above the partition, and the screw is threadedly connected to the partition and passes through the partition to contact the heat dissipation plate. Using bolts makes the structure of the protrusions simple and has the technical effect of low cost.

[0048] Preferably, the passive optical fiber is coiled in an "S" shape, so that the passive optical fiber can be fused with the beam combiner in the fiber laser from different directions, improving the simplicity of fusing the passive optical fiber with the beam combiner.

[0049] Furthermore, in this embodiment, the active optical fiber is also coiled with the minimum bending radius, thereby reducing the space occupied by the coiled active optical fiber, and further achieving the effect of reducing the volume of the fiber laser.

[0050] Combined with Figure 8 AndFigure 9 As shown, the fiber laser of an embodiment of the present invention (located on the right side in the figure) is compared with the laser of model YLR-U-K produced by IPG Photonics Corporation (located on the left side in the figure) in terms of the weight and size at powers of 3KW and 6KW. It can be seen that the length, width, and height of the fiber laser in this embodiment are respectively smaller than those of the laser of model YLR-U-K produced by IPG Photonics Corporation, thereby achieving the effect of reducing the volume of the fiber laser, further reducing the volume requirement of the fiber laser for the installation space, and expanding the application field of the fiber laser.

[0051] Embodiment Two

[0052] Combined with Figure 5 and Figure 6 As shown, this embodiment discloses another fiber laser. Different from Embodiment One, in this embodiment, multiple pump sources are located on one side of the heat dissipation plate 2, and two rows of pump sources are arranged in an array form, and the placement directions of the joints connecting the two rows of pump sources to the passive optical fiber are the same. The pump source 1 is embedded in the heat dissipation plate 2, and the difference between the sum of the length L1 of the drive power supply 71 and the width L2 of the control power supply 72 and the length L3 dimension formed by the multiple pump sources is less than the first distance. Among them, the first distance is 3 cm.

[0053] In this case, the drive power supply 71 and the control power supply 72 are on the same straight line, and the length direction of the drive power supply and the width direction of the control power supply 72 are respectively arranged in sequence along the length direction formed by the multiple pump sources, and the length direction of the drive plate 6 is arranged along the length direction formed by the multiple pump sources, which can improve the compactness inside the fiber laser, thereby achieving the purpose of reducing the length and width dimensions of the heat dissipation plate, reducing the area of the heat dissipation plate, and further reducing the volume of the fiber laser.

[0054] The heat dissipation plate in this embodiment is designed by a stretching die processing technology, which can improve the processing efficiency of the heat dissipation plate. Among them, for the pump sources of the same model, according to the number of pump sources, the profile for making the heat dissipation plate is stretched and cut into the required length, which is convenient for making it to measure up according to the required length of the heat dissipation plate, avoiding the extra size of the heat dissipation plate from increasing the volume of the fiber laser. The heat dissipation plate is stretched according to the shape of the pump source embedded in it to be applicable to pump sources of different shapes.

[0055] Embodiment Three

[0056] Combined with Figure 7As shown, this embodiment discloses another fiber laser. Different from Embodiment 1, in this embodiment, two pump sources are provided and arranged in parallel, and the joint directions of the joints connecting the passive optical fibers of each pump source are the same. The fiber laser further includes a secondary heat dissipation plate 21. The secondary heat dissipation plate 21 is located between the heat dissipation plate 2 and the pump source and is used to enhance the compressive strength of the heat dissipation plate.

[0057] Preferably, the length and width dimensions of the secondary heat dissipation plate 21 are the same as the length and width dimensions formed by the two pump sources, so as to improve the space utilization rate of the heat dissipation plate and avoid that the length and width dimensions of the secondary heat dissipation plate are respectively larger than the length and width dimensions formed by the two pump sources, resulting in an increase in the height of the fiber laser on this side and an increase in the volume of the fiber laser. Then, making the length and width dimensions of the secondary heat dissipation plate the same as those of multiple pump sources can play a role in reducing the size of the fiber laser.

[0058] In addition, preferably, the heat dissipation plate and the secondary heat dissipation plate are integrally formed, so as to improve the tightness of the connection between the heat dissipation plate and the secondary heat dissipation plate, thereby improving the heat dissipation efficiency.

[0059] The above is only the specific implementation manner of the present invention. Under the above teaching of the present invention, those skilled in the art can make other improvements or deformations on the basis of the above embodiments. Those skilled in the art should understand that the above specific description is only a better explanation of the purpose of the present invention, and the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A fiber laser, characterized in that: It includes a pump source, a drive power supply, a control power supply, a drive board and a heat dissipation board; the pump source, the drive power supply, the control power supply and the drive board are located on one side of the heat dissipation board and are connected; The length direction of the drive power supply is arranged in parallel with the length direction of the pump source, and the drive board is located between the drive power supply and the pump source; Wherein, the length of the drive power supply is L1, the width of the control power supply is L2, and the length of the pump source is L3; when L1 + L2 - L3 ≤ the first distance, the drive power supply and the control power supply are located on the same straight line, and the length direction of the drive power supply and the width direction of the control power supply are arranged in sequence along the length direction of the pump source, and the length direction of the drive board is arranged along the length direction of the pump source; When L1 + L2 - L3 > the first distance, the control power supply is located between the drive power supply and the pump source and is on the same straight line as the drive board, and the control power supply and the drive board are respectively arranged along the length direction of the pump source; the length direction of the control power supply and the length direction of the drive board are respectively arranged along the length direction of the pump source.

2. The fiber laser according to claim 1, characterized in that: There are multiple pump sources which are divided into two rows, and the two rows of pump sources are arranged in parallel and staggered.

3. The fiber laser according to claim 1, characterized in that: When L1 + L2 - L3 > the first distance, the sum of the lengths of the control power supply and the drive board does not exceed the length of the pump source.

4. The fiber laser according to any one of claims 1-3, characterized in that: This fiber laser also includes a secondary heat dissipation board; the secondary heat dissipation board is located between the pump source and the heat dissipation board and has the same length and width dimensions as the pump source.

5. The fiber laser according to any one of claims 1-3, characterized in that: This fiber laser also includes a partition board and a passive optical fiber; the upper part of the pump source is connected to the partition board, one side of the partition board is connected to the heat dissipation board, and the other side of the partition board is used to place and fix the passive optical fiber; the passive optical fiber is connected to the pump source and is used for the transmission of pump light.

6. The fiber laser according to claim 5, wherein: There are multiple protrusions on one side of the partition board where the passive optical fiber is placed.

7. The fiber laser according to claim 5, characterized in that: The passive optical fiber is coiled in an "S" shape.

8. The fiber laser according to any one of claims 1-3, characterized in that: This fiber laser also includes a handle; the handle is located on the front panel and / or the rear panel of the housing of this fiber laser.

9. The fiber laser according to claim 8, wherein: This fiber laser also includes a control board; the control board is provided with an external connection port and a signal lamp, the control board is located outside the housing, and is located on the side where the handle is provided and is communicated with the inside of the housing.

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