A high power four-core co-cavity laser and a working method thereof

Abstract

The application relates to the technical field of fiber lasers, in particular to a high-power four-core common-cavity laser and a working method thereof. The inside of a shell is provided with a pump source assembly, a laser resonant cavity assembly and a laser output assembly. The pump source assembly comprises four semiconductor lasers and four coupling heads. The laser resonant cavity assembly comprises a rectangular box and four ceramic tubes arranged in the rectangular box. The inside of the ceramic tubes is coaxially provided with a front cavity mirror, a laser rod and an output mirror in sequence. The heat dissipation part in the application is divided into a first heat dissipation cavity and a second heat dissipation cavity. The shunt mechanism can control the cold water to enter the first heat dissipation cavity or the second heat dissipation cavity, so that the internal components of the laser can be targetedly heat-dissipated. Compared with the prior art, the application can also help to improve the heat dissipation efficiency, thereby helping to improve the stability of the output light beam and the laser quality.

Description

Technical Field

[0001] This invention relates to the field of fiber laser technology, specifically to a high-power four-core common cavity laser and its operating method. Background Technology

[0002] The four-core common-cavity fiber laser is an innovative laser technology that cleverly combines the concepts of multi-core fiber and common-cavity laser, achieving phase locking of multiple fiber cores within the same resonant cavity and enabling them to output laser light collectively. This design integrates the advantages of multi-core fiber and common-cavity laser, exhibiting the following significant characteristics and advantages:

[0003] 1. Compact structure: The four-core co-cavity fiber laser integrates multiple fiber cores into the same resonant cavity, which significantly reduces the size of the laser and enables it to achieve high power output in a limited space. It is particularly suitable for laser applications that require compact design.

[0004] 2. High output power: By integrating multiple fiber cores in the same resonant cavity, the four-core co-cavity fiber laser can achieve high power output. Each fiber core can generate laser independently, and the laser outputs of multiple fiber cores are combined through phase-locking technology, thereby significantly improving the total output power and meeting the needs of high-power laser applications.

[0005] 3. High beam quality: The four-core co-cavity fiber laser achieves phase locking between the fiber cores through evanescent wave coupling or other mechanisms, ensuring the beam quality of the output laser. The phase locking technology keeps the laser output of multiple fiber cores consistent in space and time, thereby producing a high-quality laser beam, which is suitable for precision machining and scientific research fields with strict requirements for beam quality.

[0006] 4. Phase Locking: Phase locking between fiber cores is one of the key technologies of four-core co-cavity fiber lasers. By precisely controlling the phase relationship between fiber cores, coherent superposition of laser output can be achieved, improving the coherence and stability of the laser, ensuring the reliability and consistency of laser output, and obtaining high-power, high-quality beams.

[0007] Currently, all existing multi-core fiber lasers contain pump source components, laser resonator cavities, and laser output systems. The primary function of the pump source component is to provide energy to excite the laser medium to achieve population inversion, thereby initiating and maintaining laser generation. However, in practical applications, not all input energy (generally electrical energy) is completely converted into laser output; some energy is lost as heat, leading to the most severe heating issue in the pump source. Secondly, after absorbing pump light energy, the gain medium within the resonator absorbing the energy undergoes energy level transitions and generates laser light. However, not all energy is output as laser light during this process; some energy is also lost as heat, further causing the resonator to heat up.

[0008] In summary, the pump source in existing fiber lasers experiences the most severe heat generation, followed by the resonant cavity. Furthermore, due to the relationship between fiber refractive index and temperature, changes in temperature alter the fiber refractive index, leading to wavelength drift. Therefore, the heat dissipation efficiency of fiber lasers directly affects the beam output quality and stability. While existing fiber lasers incorporate internal heat dissipation mechanisms, these mechanisms cannot effectively cool specific components within the laser. Therefore, we propose a high-power four-core common-cavity laser and its operating method to effectively address the aforementioned shortcomings. Summary of the Invention

[0009] The purpose of this invention is to provide a high-power four-core common cavity laser and its operating method, in order to solve the problems mentioned in the background art.

[0010] This invention is achieved through the following technical solution: a high-power four-core common cavity laser, comprising a housing, wherein the housing contains a pump source assembly, a laser resonant cavity assembly, and a laser output assembly. The pump source assembly includes four semiconductor lasers and four coupling heads. The laser resonant cavity assembly includes a rectangular box and four ceramic tubes disposed inside the rectangular box. A front cavity mirror, a laser rod, and an output mirror are coaxially arranged inside each ceramic tube. The output ends of the semiconductor lasers are connected to the corresponding coupling heads via optical fibers. The four coupling heads emit laser light to the starting ends of the corresponding ceramic tubes via optical fibers. The ends of the four ceramic tubes are all connected to the laser output assembly via optical fibers.

[0011] The bottom surface of the housing is provided with a heat dissipation part, which is a rectangular hollow box structure without a top cover. The heat dissipation part is provided with a partition, which divides the interior of the heat dissipation part into a first heat dissipation cavity and a second heat dissipation cavity. The first heat dissipation cavity is located directly below the pump source assembly, and the second heat dissipation cavity is located directly below the laser resonator cavity assembly and the laser output assembly. The first heat dissipation cavity is provided with symmetrical baffles on the front and rear sides. The outer sides of the two baffles and the side wall of the heat dissipation part together form two flow distribution cavities. The side wall of the heat dissipation part is also provided with a water inlet and a water outlet, which are respectively connected to the two flow distribution cavities.

[0012] Both of the flow-dividing cavities are equipped with flow-dividing mechanisms inside, which are used to connect the flow-dividing cavities with the first heat dissipation cavity or the second heat dissipation cavity.

[0013] Optionally, the top surface of the heat dissipation part is flush with the top surface of the partition and the baffle, and the top surfaces of the heat dissipation part, the partition and the baffle are all in close contact with the bottom surface of the housing.

[0014] Optionally, guide plates are staggered on the left and right sides inside the first heat dissipation cavity, and a plurality of heat dissipation fins are provided on the bottom surface of the shell, with the plurality of heat dissipation fins extending into the first heat dissipation cavity and the second heat dissipation cavity respectively.

[0015] Optionally, the diversion mechanism includes a diversion ring, which is fixedly disposed on the inner bottom surface of the heat dissipation part. A sealing ring is fitted to the inner ring wall of the diversion ring. A first through hole is formed through the side wall of the diversion ring and the sealing ring. A first conduit and a second conduit are also provided on the outer side wall of the diversion ring. The first conduit passes through the baffle plate and extends into the area between the two baffle plates. The second conduit passes through the partition plate and extends into the second heat dissipation cavity. A rotating column is inserted inside the diversion ring. The rotating column is tightly fitted to the inner surface of the sealing ring. A vertical hole is formed on the top surface of the rotating column. A diversion groove is formed on the outer surface of the rotating column. A first guide hole and a second guide hole are symmetrically formed on both sides inside the vertical hole. The first guide hole is connected to the first through hole, and the second guide hole is connected to the diversion groove.

[0016] Optionally, a sealing cap is detachably connected to the top of the diversion ring, and the bottom end of the sealing cap is embedded in the vertical hole; when the first guide hole is aligned with the middle position of the first through hole, both the first guide tube and the second guide tube are connected to the diversion groove.

[0017] Optionally, a first sealing part and a second sealing part are symmetrically arranged on the left and right sides inside the second heat dissipation cavity. The first sealing part and the second sealing part are each composed of two plate-like structures. A sealing plate is provided between the first sealing part and the second sealing part. The thickness of the sealing plate is adapted to the internal gap between the first sealing part and the second sealing part. An adjusting screw is rotatably provided at one end of the sealing plate inside the second sealing part. The outer end of the adjusting screw passes through the side wall of the heat dissipation part and is threadedly connected to it.

[0018] Optionally, the top ends of the first sealing part and the second sealing part are flush with the top surface of the heat dissipation part, the bottom end of the sealing plate is in contact with the inner bottom surface of the heat dissipation part, the top end of the sealing plate is in contact with the bottom surface of the housing, and the sealing plate and the second sealing part are in sliding fit.

[0019] Optionally, the bottom surface of the heat dissipation part is provided with an adjustment part, the bottom ends of the two rotating columns penetrate the bottom wall of the heat dissipation part and extend into the inner side of the adjustment part and are provided with driven gears, the bottom surface of the sealing plate located in the second sealing part is provided with a connecting column, the bottom end of the connecting column penetrates the bottom wall of the heat dissipation part and extends into the inner side of the adjustment part and is provided with a driving part, the driving part is Y-shaped, and racks are provided on both outer sides of the driving part, and the two racks mesh with the two driven gears respectively.

[0020] Optionally, the top surface of the sealing plate is provided with a water inlet hole, and the side of the sealing plate facing the water inlet is provided with a second through hole, which is connected to the water inlet hole; the bottom wall of the shell is provided with a third through hole and a fourth through hole, the interior of the rectangular box is provided with a heat dissipation channel, and the bottom surface of the rectangular box is provided with a water inlet pipe and a water outlet pipe communicating with the heat dissipation channel, which are respectively inserted into the third through hole and the fourth through hole; when the first conduit and the second conduit are both fully aligned with the diversion groove, the second through hole is located in the second sealing part, and one end of the sealing plate is located outside the first sealing part; when the first conduit is fully aligned with the diversion groove, and a part of the second conduit is aligned with the diversion groove, both ends of the sealing plate are located in the first sealing part and the second sealing part, respectively, and the water inlet hole is aligned with the third through hole.

[0021] This invention also proposes a method for operating a high-power four-core common-cavity laser, applicable to the aforementioned high-power four-core common-cavity laser, comprising the following steps:

[0022] Cold water is injected into the heat dissipation unit through the inlet and the circulating water in the heat dissipation unit is discharged through the outlet to cool the shell.

[0023] In the initial state, both the first conduit and the second conduit are connected to the diversion channel, so the cold water entering the heat dissipation section can simultaneously enter the first heat dissipation cavity and the second heat dissipation cavity to uniformly cool the shell.

[0024] After a period of use, the adjusting screw can be rotated to make the first conduit fully aligned with the diversion groove, and part of the second conduit aligned with the diversion groove. At this time, most of the cold water will enter the first heat dissipation cavity, and a small amount of cold water will enter the heat dissipation channel inside the rectangular box for centralized cooling of the pump source component and the laser resonant cavity component.

[0025] Finally, as usage time continues to increase, the adjusting screw can be turned again to align the diversion channel with only the first conduit, so that cold water can completely enter the first heat dissipation chamber, thereby cooling the pump source component separately.

[0026] Compared with the prior art, the present invention provides a high-power four-core common cavity laser and its operating method, which has the following beneficial effects:

[0027] 1. In this invention, the heat dissipation section is divided into a first heat dissipation cavity and a second heat dissipation cavity. The flow diversion mechanism can control the flow of cold water into the first heat dissipation cavity or the second heat dissipation cavity, thereby enabling targeted heat dissipation of the internal components of the laser. Compared with the prior art, this invention also helps to improve heat dissipation efficiency, thereby helping to improve the stability of the output beam and the laser quality.

[0028] 2. The present invention also includes a sealing plate. When the water inlet is aligned with the third through hole on the bottom wall of the housing, the cold water in the heat dissipation section can also enter the rectangular box, thereby enabling the present invention to specifically dissipate heat from the laser resonant cavity assembly, thus fully ensuring the beam output quality.

[0029] 3. The sealing plate and the rotating column in this invention have a linkage relationship. When the user rotates the adjusting screw, the sealing plate can move and the rotating column can rotate at the same time. Therefore, this invention can help the user to control the water flow direction in a timely manner, thereby controlling the heat dissipation priority of each component in the laser. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the interior of the casing of the present invention;

[0032] Figure 3 This is a schematic diagram of the third and fourth through holes of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the heat dissipation part of the present invention;

[0034] Figure 5 This is a cross-sectional view of the first state of the heat dissipation part of the present invention;

[0035] Figure 6 This is a cross-sectional view of the second state of the heat dissipation part of the present invention;

[0036] Figure 7 This is a cross-sectional view of the interior of the heat dissipation section of the present invention in a third state.

[0037] Figure 8 This is an exploded view of the diversion mechanism of the present invention;

[0038] Figure 9 This is a schematic diagram of the adjustment part of the present invention;

[0039] Figure 10 This is a schematic diagram of the laser resonator structure of the present invention;

[0040] Figure 11 for Figure 4 Enlarged view of point A in the middle;

[0041] Figure 12 for Figure 5 Enlarged view of the corresponding area at point B.

[0042] In the diagram: 100, Housing; 101, Laser power interface; 102, Third through hole; 103, Third through hole; 200, Pump source assembly; 201, Semiconductor laser; 202, Coupler head; 300, Laser resonator assembly; 301, Rectangular box; 302, Ceramic tube; 303, Heat dissipation channel; 304, Water inlet pipe; 305, Water outlet pipe; 400, Laser output assembly; 500, Heat dissipation section; 501, Partition plate; 502, First heat dissipation cavity; 503, Second heat dissipation cavity; 504, Baffle plate; 505, Flow divider cavity; 506, Water inlet; 507, Water outlet; 508, Guide... 509. Flow plate; 510. Heat sink; 511. First sealing part; 512. Second sealing part; 513. Sealing plate; 514. Adjusting screw; 515. Connecting column; 516. Drive unit; 517. Rack; 518. Water inlet; 600. Second through hole; 601. Diverting mechanism; 602. Diverting ring; 603. Sealing ring; 604. First through hole; 605. Second conduit; 606. Rotating column; 607. Vertical hole; 608. Diverting groove; 609. First guide hole; 610. Second guide hole; 611. Sealing cover; 612. Driven gear; 700. Adjusting part. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1: Please refer to Figure 1 - Figure 12 A high-power four-core common cavity laser includes a housing 100. Inside the housing 100 are a pump source assembly 200, a laser resonant cavity assembly 300, and a laser output assembly 400. The pump source assembly 200 includes four semiconductor lasers 201 and four coupling heads 202. The laser resonant cavity assembly 300 includes a rectangular box 301 and four ceramic tubes 302 disposed inside the rectangular box 301. Inside the ceramic tubes 302, a front cavity mirror, a laser rod, and an output mirror are arranged coaxially in sequence. The output ends of the semiconductor lasers 201 are connected to the corresponding coupling heads 202 via optical fibers. The four coupling heads 202 emit laser light to the starting ends of the corresponding ceramic tubes 302 via optical fibers. The ends of the four ceramic tubes 302 are all connected to the laser output assembly 400 via optical fibers. In addition, a laser power interface 101 is provided on the side wall of the housing 100, and the laser power interface 101 is electrically connected to the four semiconductor lasers 201.

[0045] It should be noted that when the laser power interface 101 is connected to an external power source, the pump laser generated by the pump source component 200 is focused through the optical fiber into the coupling head 202. After focusing, the pump laser is emitted through the coupling head 202 into the laser resonant cavity component 300. Further, the laser rod absorbs the pump light and emits laser light. The rear surface of the front cavity mirror and the front surface of the output mirror are coated with a high-reflectivity film with a reflection wavelength of N micrometers. In the resonant cavity formed by the front cavity mirror and the output mirror, the laser with a wavelength of N micrometers propagating along the optical axis is preferentially amplified, while light of other frequencies and directions is suppressed. Finally, the laser with a wavelength of N micrometers is output from the output mirror. The four lasers enter the laser output component 400 through optical fibers and are then converged and emitted after being delivered by the laser output component 400.

[0046] Furthermore, the bottom surface of the housing 100 is provided with a heat dissipation part 500, such as... Figure 4 As shown, the heat dissipation unit 500 has a rectangular hollow box structure without a top cover. The interior of the heat dissipation unit 500 is provided with a partition 501, which divides the interior of the heat dissipation unit 500 into a first heat dissipation cavity 502 and a second heat dissipation cavity 503, as shown. Figure 5 As shown, the first heat dissipation cavity 502 is located directly below the pump source assembly 200, and the second heat dissipation cavity 503 is located directly below the laser resonator cavity assembly 300 and the laser output assembly 400. The first heat dissipation cavity 502 has symmetrically arranged baffle plates 504 on the front and rear sides inside. The outer sides of the two baffle plates 504 and the side wall of the heat dissipation part 500 together form two flow-diverting cavities 505. Specifically, the top surface of the heat dissipation part 500 is flush with the top surfaces of the partition plate 501 and the baffle plate 504. The top surfaces of the heat dissipation part 500, the partition plate 501 and the baffle plate 504 are all in close contact with the bottom surface of the housing 100. In addition, the outer surface of the housing 100 and the outer surface of the heat dissipation part 500 are provided with connecting ears. The connecting ears on the housing 100 and the heat dissipation part 500 are aligned and bolted together.

[0047] More specifically, the side wall of the heat dissipation unit 500 is also provided with an inlet 506 and an outlet 507, which are respectively connected to two flow distribution chambers 505; the interior of the first heat dissipation chamber 502 is provided with staggered guide plates 508 on the left and right sides, and the bottom surface of the housing 100 is provided with a plurality of heat dissipation fins 509, which extend into the first heat dissipation chamber 502 and the second heat dissipation chamber 503 respectively. In addition, the housing 100 and the heat dissipation fins 509 are integrally formed, and the housing 100 is made of blackened aluminum alloy.

[0048] On the other hand, each of the two flow-dividing cavities 505 is provided with a flow-dividing mechanism 600, which is used to connect the flow-dividing cavity 505 with the first heat dissipation cavity 502 or the second heat dissipation cavity 503. The flow-dividing mechanism 600 includes a flow-dividing ring 601, such as... Figure 12As shown, the diversion ring 601 is fixedly disposed on the inner bottom surface of the heat dissipation part 500. The inner ring wall of the diversion ring 601 is fitted with a sealing ring 602, which is made of rubber. The side wall of the diversion ring 601 and the sealing ring 602 are provided with a first through hole 603. The outer side wall of the diversion ring 601 is also provided with a first conduit 604 and a second conduit 605. Both the first conduit 604 and the second conduit 605 are connected to the interior of the diversion ring 601. The first conduit 604 passes through the baffle plate 504 and extends into the area between the two baffle plates 504. The second conduit 605 passes through the partition plate 501 and extends into the second heat dissipation cavity 503.

[0049] A rotating post 606 is inserted inside the flow divider ring 601. The rotating post 606 is tightly fitted to the inner surface of the sealing ring 602. A vertical hole 607 is formed on the top surface of the rotating post 606, and a flow divider groove 608 is formed on the outer surface of the rotating post 606. A first guide hole 609 and a second guide hole 610 are symmetrically formed on both sides inside the vertical hole 607. The first guide hole 609 is connected to the first through hole 603, and the second guide hole 610 is connected to the flow divider groove 608. A sealing cap 611 is bolted to the top of the flow divider ring 601, and the bottom end of the sealing cap 611 is embedded in the vertical hole 607. When the first guide hole 609 is aligned with the middle position of the first through hole 603, the first guide tube 604 and the second guide tube 605 are both connected to the flow divider groove 608. Figure 12 As shown, at this time, after the cold water enters the heat dissipation section 500 through the inlet 506, it can enter the area between the two baffles 504 and the second heat dissipation cavity 503 respectively. Then, the circulating water enters another diversion cavity 505 from the area between the two baffles 504 and the second heat dissipation cavity 503, and finally is discharged through the outlet 507.

[0050] like Figure 5As shown, a first sealing part 510 and a second sealing part 511 are symmetrically arranged on the left and right sides inside the second heat dissipation cavity 503. Both the first sealing part 510 and the second sealing part 511 are composed of two plate-like structures. A sealing plate 512 is provided between the first sealing part 510 and the second sealing part 511. The thickness of the sealing plate 512 is adapted to the internal gap between the first sealing part 510 and the second sealing part 511. An adjusting screw 513 is rotatably provided at one end of the sealing plate 512 located inside the second sealing part 511. The outer end of the adjusting screw 513 penetrates the side wall of the heat dissipation cavity 500 and is threadedly connected to it. The top ends of the first sealing part 510 and the second sealing part 511 are flush with the top surface of the heat dissipation cavity 500, the bottom end of the sealing plate 512 is in contact with the inner bottom surface of the heat dissipation cavity 500, and the top end of the sealing plate 512 is in contact with the bottom surface of the housing 100. The sealing plate 512 and the second sealing part 511 are in sliding fit. Therefore, rotating the adjusting screw 513 directly controls the left and right sliding of the sealing plate 512. When both ends of the sealing plate 512 are inserted into the first sealing part 510 and the second sealing part 511 respectively, cold water cannot pass through the sealing plate 512 and enter the other side of the sealing plate 512.

[0051] In addition, the bottom surface of the heat dissipation unit 500 is provided with an adjustment part 700, which is a rectangular hollow box structure, such as... Figure 9 As shown, the adjusting part 700 and the heat dissipation part 500 are bolted together. The bottom ends of the two rotating columns 606 penetrate the bottom wall of the heat dissipation part 500 and extend into the inner side of the adjusting part 700, and are equipped with driven gears 612. The bottom surface of one end of the sealing plate 512 located inside the second sealing part 511 is equipped with a connecting column 514. The bottom end of the connecting column 514 penetrates the bottom wall of the heat dissipation part 500 and extends into the inner side of the adjusting part 700, and is equipped with a driving part 515. The driving part 515 is Y-shaped, and racks 516 are provided on both outer sides of the driving part 515. The two racks 516 mesh with the two driven gears 612 respectively. Therefore, when the sealing plate 512 moves left and right, the rotation of the two rotating columns 606 can be indirectly controlled by the corresponding angle.

[0052] Furthermore, the top surface of the sealing plate 512 is provided with a water inlet hole 517, and the side of the sealing plate 512 facing the water inlet 506 is provided with a second through hole 518, which is connected to the water inlet hole 517; the bottom wall of the shell 100 is provided with a third through hole 102 and a fourth through hole 103, the interior of the rectangular box 301 is provided with a heat dissipation channel 303, and the bottom surface of the rectangular box 301 is provided with a water inlet pipe 304 and a water outlet pipe communicating with the heat dissipation channel 303. Pipe 305, inlet pipe 304, and outlet pipe 305 are respectively inserted into the third through hole 102 and the fourth through hole 103; when the first conduit 604 and the second conduit 605 are both fully aligned with the diversion groove 608, the second through hole 518 is located inside the second sealing part 511, and one end of the sealing plate 512 is located outside the first sealing part 510; when the first conduit 604 is fully aligned with the diversion groove 608, and a part of the second conduit 605 is aligned with the diversion groove 608, such as Figure 7 As shown, at this time, the two ends of the sealing plate 512 are located in the first sealing part 510 and the second sealing part 511 respectively, and the water inlet hole 517 is aligned with the third through hole 102.

[0053] Example 2: This example also proposes a working method for a high-power four-core common-cavity laser, applicable to the aforementioned high-power four-core common-cavity laser, including the following steps:

[0054] Cold water is injected into the heat dissipation unit 500 through the water inlet 506 and the circulating water in the heat dissipation unit 500 is discharged through the water outlet 507 to cool the housing 100.

[0055] In the initial state, both the first conduit 604 and the second conduit 605 are connected to the diversion channel 608, so the cold water entering the heat dissipation section 500 can simultaneously enter the first heat dissipation cavity 502 and the second heat dissipation cavity 503 to uniformly cool the shell; in this state, as Figure 5 As shown, one end of the sealing plate 512 is pulled out from the first sealing part 510, so the water can flow in the second heat dissipation cavity 503 in an S-shape to increase the cooling effect of the water flow. Secondly, since the sealing plate 512 is attached to the bottom surface of the housing 100, the sealing plate 512 can also serve as a heat conduction and cooling medium for the housing 100.

[0056] After a period of use, the adjusting screw 513 can be rotated to align the first conduit 604 completely with the diversion groove 608, and a portion of the second conduit 605 with the diversion groove 608, such as... Figure 7As shown, most of the cold water will enter the first heat dissipation cavity 502, and a small portion of the cold water will enter the heat dissipation channel 303 inside the rectangular box 301, for centralized cooling of the pump source assembly 200 and the laser resonant cavity assembly 300. It should be noted that since the pump source and resonant cavity inside the laser generate a lot of heat, after a period of use, it is necessary to concentrate the heat dissipation of both in order to improve the heat dissipation efficiency.

[0057] Finally, as usage time continues to increase, the adjusting screw 513 can be turned again to align the diverter 608 with only the first conduit 604, such as... Figure 6 As shown, this allows cold water to fully enter the first heat dissipation chamber 502, thereby cooling the pump source assembly 200 separately. It should be noted that since the pump source within the laser experiences the most significant heat generation, its temperature will increase with usage time. Therefore, to prevent damage to the pump source due to overheating, the shunt mechanism 600 can be adjusted to... Figure 6 As shown, cold water is fully introduced into the first heat dissipation chamber 502, thereby significantly improving the heat dissipation efficiency of the pump source component 200.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-power four-core common-cavity laser comprising a shell (100), characterized in that: the interior of the shell (100) is provided with a pump source assembly (200), a laser resonant cavity assembly (300) and a laser output assembly (400), the pump source assembly (200) comprises four semiconductor lasers (201) and four coupling heads (202), the laser resonant cavity assembly (300) comprises a rectangular box (301) and four ceramic tubes (302) arranged inside the rectangular box (301), the interior of the ceramic tubes (302) is coaxially provided with, in sequence, a front cavity mirror, a laser rod and an output mirror, the output end of the semiconductor laser (201) is connected to the corresponding coupling head (202) through an optical fiber, the four coupling heads (202) emit laser to the starting end of the corresponding ceramic tube (302) through an optical fiber, and the terminal end of the four ceramic tubes (302) is connected to the laser output assembly (400) through an optical fiber; the bottom surface of the shell (100) is provided with a heat dissipation part (500), the heat dissipation part (500) is a hollow box structure with a long rectangular top end without a cover, the interior of the heat dissipation part (500) is provided with a partition plate (501), the partition plate (501) divides the interior of the heat dissipation part (500) into a first heat dissipation cavity (502) and a second heat dissipation cavity (503), the first heat dissipation cavity (502) is located directly below the pump source assembly (200), the second heat dissipation cavity (503) is located directly below the laser resonant cavity assembly (300) and the laser output assembly (400), the interior of the first heat dissipation cavity (502) is symmetrically provided with a blocking plate (504) at the front and back sides, the outer side surfaces of the two blocking plates (504) and the side wall of the heat dissipation part (500) jointly enclose two shunt cavities (505), the side wall of the heat dissipation part (500) is further provided with a water inlet (506) and a water outlet (507), and the water inlet (506) and the water outlet (507) are respectively connected to the two shunt cavities (505) in communication; the interior of the two shunt cavities (505) is respectively provided with a shunt mechanism (600), and the shunt mechanism (600) is used for connecting the shunt cavity (505) with the first heat dissipation cavity (502) or the second heat dissipation cavity (503). ​ The shunt mechanism (600) comprises a shunt ring (601) fixedly arranged on the inner bottom surface of the heat dissipation part (500), the inner ring wall of the shunt ring (601) is matched with a sealing ring (602), the side wall of the shunt ring (601) and the sealing ring (602) are provided with a first through hole (603) penetrating through the side wall and the sealing ring (602), the outer side wall of the shunt ring (601) is further provided with a first conduit (604) and a second conduit (605), the first conduit (604) penetrates through the blocking plate (504) and extends into the area between the two blocking plates (504), and the second conduit (605) penetrates through the partition plate (501) and extends into the second heat dissipation cavity (503); a rotating column (606) is inserted into the shunt ring (601), the rotating column (606) is tightly matched with the inner surface of the sealing ring (602), a vertical hole (607) is arranged on the top surface of the rotating column (606), a shunt groove (608) is arranged on the outer surface of the rotating column (606), first and second guide holes (609) and (610) are symmetrically arranged on the inner sides of the vertical hole (607), the first guide hole (609) is in communication with the first through hole (603), and the second guide hole (610) is in communication with the shunt groove (608). The top end of the shunt ring (601) is detachably connected with a blocking cover (611), and the bottom end of the blocking cover (611) is embedded into the vertical hole (607); when the first guide hole (609) is aligned with the middle position of the first through hole (603), the first conduit (604) and the second conduit (605) are in communication with the shunt groove (608).

2. The high power four-core co-cavity laser of claim 1, wherein: The top surfaces of the heat dissipation part (500), the partition plate (501) and the blocking plate (504) are flush, and the top surfaces of the heat dissipation part (500), the partition plate (501) and the blocking plate (504) are tightly matched with the bottom surface of the shell (100).

3. The high power four-core co-cavity laser of claim 1, wherein: The first heat dissipation cavity (502) is provided with flow guide plates (508) staggered on the left and right sides, and the bottom surface of the shell (100) is provided with a plurality of heat dissipation fins (509), and the heat dissipation fins (509) extend into the first heat dissipation cavity (502) and the second heat dissipation cavity (503) respectively.

4. The high power four core common cavity laser of claim 1, wherein: The first and second sealing parts (510) and (511) are symmetrically arranged on the left and right sides of the second heat dissipation cavity (503), the first and second sealing parts (510) and (511) are composed of two plate-shaped structures, a blocking plate (512) is arranged between the first and second sealing parts (510) and (511), the thickness of the blocking plate (512) is matched with the internal gap of the first and second sealing parts (510) and (511), and an adjusting screw (513) is rotatably arranged at one end of the blocking plate (512) in the second sealing part (511), and the outer end of the adjusting screw (513) penetrates through the side wall of the heat dissipation part (500) and is threadedly connected with the side wall.

5. The high power four core common cavity laser of claim 4, wherein: The top ends of the first sealing part (510) and the second sealing part (511) are flush with the top surface of the heat dissipation part (500), the bottom end of the blocking plate (512) is attached to the inner bottom surface of the heat dissipation part (500), the top end of the blocking plate (512) is attached to the bottom surface of the shell (100), and the blocking plate (512) and the second sealing part (511) are slidingly fitted.

6. A high power four core common cavity laser as claimed in claim 5, wherein: The bottom surface of the heat dissipation part (500) is provided with an adjusting part (700), the bottom ends of the two rotating columns (606) penetrate through the bottom wall of the heat dissipation part (500) and extend into the inside of the adjusting part (700) and are provided with driven gears (612), one end of the bottom surface of the blocking plate (512) located in the second sealing part (511) is provided with a connecting column (514), the bottom end of the connecting column (514) penetrates through the bottom wall of the heat dissipation part (500) and extends into the inside of the adjusting part (700) and is provided with a driving part (515), the driving part (515) is Y-shaped, the outer two sides of the driving part (515) are provided with racks (516), and the two racks (516) are respectively engaged with the two driven gears (612).

7. The high power four core common cavity laser of claim 6, wherein: The top surface of the blocking plate (512) is provided with a water inlet hole (517), one side of the side surface of the blocking plate (512) and facing the water inlet (506) is provided with a second through hole (518), the second through hole (518) is communicated with the water inlet hole (517), the bottom wall of the shell (100) is provided with a third through hole (102) and a fourth through hole (103), the inside of the rectangular box (301) is provided with a heat dissipation channel (303), the bottom surface of the rectangular box (301) is provided with a water inlet pipe (304) and a water outlet pipe (305) communicated with the heat dissipation channel (303), the water inlet pipe (304) and the water outlet pipe (305) are respectively inserted into the third through hole (102) and the fourth through hole (103), when the first conduit (604) and the second conduit (605) are completely aligned with the shunt groove (608), the second through hole (518) is located in the second sealing part (511), and one end of the blocking plate (512) is located outside the first sealing part (510), when the first conduit (604) is completely aligned with the shunt groove (608) and a part of the second conduit (605) is aligned with the shunt groove (608), the two ends of the blocking plate (512) are respectively located in the first sealing part (510) and the second sealing part (511), and the water inlet hole (517) is aligned with the third through hole (102).

8. A method for operating a high power four-core co-cavity laser as claimed in claim 7, wherein, The steps include: Cold water is injected into the inside of the heat dissipation part (500) through the water inlet (506), and circulating water in the heat dissipation part (500) is discharged through the water outlet (507) to cool the shell (100); In the initial state, the first conduit (604) and the second conduit (605) are communicated with the shunt groove (608), so that the cold water entering the heat dissipation part (500) can enter the first heat dissipation cavity (502) and the second heat dissipation cavity (503) at the same time to uniformly cool the shell; In the initial state, the first conduit (604) and the second conduit (605) are communicated with the shunt groove (608), so that the cold water entering the heat dissipation part (500) can enter the first heat dissipation cavity (502) and the second heat dissipation cavity (503) at the same time to uniformly cool the shell; After a period of use, the adjusting screw (513) is rotated to make the first conduit (604) fully aligned with the shunt groove (608) and a part of the second conduit (605) aligned with the shunt groove (608), at this time most of the cold water will enter the first heat dissipation cavity (502) and a small part of the cold water will enter the heat dissipation channel (303) inside the rectangular box (301) to collectively cool the pump source assembly (200) and the laser resonant cavity assembly (300); Finally, when the use time continues to increase, the adjusting screw (513) is rotated again to make the shunt groove (608) only aligned with the first conduit (604), so that the cold water can fully enter the first heat dissipation cavity (502) to cool the pump source assembly (200) alone.

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