High-power four-core common-cavity laser and working method thereof

Abstract

The invention relates to the technical field of optical fiber lasers, in particular to a high-power four-core common-cavity laser and a working method thereof.The high-power four-core common-cavity laser comprises a pumping source assembly, a laser resonant cavity assembly and a laser output assembly which are arranged in a shell, and the pumping 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, and a front cavity mirror, a laser rod and an output mirror are sequentially and coaxially arranged in each ceramic tube. According to the invention, the heat dissipation part is internally divided into the first heat dissipation cavity and the second heat dissipation cavity, and the shunting mechanism can control cold water to enter the first heat dissipation cavity or the second heat dissipation cavity, so that heat dissipation can be performed on internal components of the laser in a targeted manner, and compared with the prior art, the heat dissipation efficiency is improved, and the heat dissipation efficiency is improved. Therefore, the stability of the output light beam and the laser quality can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber lasers, and in particular to a high-power four-core common-cavity laser and a working method thereof. Background Art

[0002] 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 in the same resonant cavity and common laser output. This design combines the advantages of multi-core fiber and common-cavity laser, showing the following significant features and advantages:

[0003] 1. Compact structure: The four-core common-cavity fiber laser integrates multiple fiber cores in the same resonant cavity, which significantly reduces the volume 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 common-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 achieving a significant increase in the total output power and meeting the needs of high-power laser applications.

[0005] 3. Good beam quality: The four-core common-cavity fiber laser achieves phase locking between the cores through evanescent wave coupling or other mechanisms, ensuring the beam quality of the output laser. The phase locking technology makes the laser output of multiple cores consistent in space and time, thereby generating a high-quality laser beam, which is suitable for precision processing and scientific research fields that have strict requirements on beam quality.

[0006] 4. Phase locking: Phase locking between fiber cores is one of the key technologies of four-core common-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 a high-power, high-quality beam.

[0007] At present, the existing multi-core fiber lasers are equipped with pump source components, laser resonant cavities, laser output systems and other mechanisms. Among them, the main function of the pump source component is to provide energy to stimulate the laser medium to achieve a population inversion, thereby starting and maintaining the generation of the laser. However, in the specific application process, not all input energy (generally electrical energy) can be completely converted into laser output, and part of the energy will be dissipated in the form of heat energy, resulting in the most serious heating of the pump source. Secondly, after absorbing the pump light energy, the gain medium in the resonant cavity will undergo energy level transitions and generate lasers. However, in this process, not all energy is output in the form of lasers, and part of the energy will be dissipated in the form of heat energy, which will cause the resonant cavity to heat up.

[0008] In summary, the heating of the internal pump source of the existing fiber laser is the most serious, and the heating of the resonant cavity is second. In addition, due to the relationship between the refractive index of the fiber and the temperature, the change in temperature will cause the change in the refractive index of the fiber, thereby causing the wavelength to drift. Therefore, the heat dissipation efficiency of the fiber laser directly affects the quality and stability of the laser beam output. In the prior art, although a heat dissipation mechanism is also set inside the fiber laser, the existing heat dissipation mechanism cannot specifically cool down the corresponding components inside the laser. In view of this, we propose a high-power four-core common cavity laser and its working method to well solve the above-mentioned drawbacks. Summary of the invention

[0009] The object of the present invention is to provide a high-power four-core common-cavity laser and a working method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0010] The present invention is realized by the following technical scheme: a high-power four-core common cavity laser, comprising a shell, wherein a pump source component, a laser resonant cavity component and a laser output component are arranged inside the shell, wherein the pump source component comprises four semiconductor lasers and four coupling heads, wherein the laser resonant cavity component comprises a rectangular box and four ceramic tubes arranged inside the rectangular box, wherein a front cavity mirror, a laser rod and an output mirror are coaxially arranged inside the ceramic tube in sequence, wherein the output end of the semiconductor laser is connected to the corresponding coupling head through an optical fiber, wherein the four coupling heads emit laser light to the starting end of the corresponding ceramic tube through the optical fiber, and the ends of the four ceramic tubes are connected to the laser output component through the optical fiber;

[0011] The bottom surface of the shell is provided with a heat dissipation part, and the heat dissipation part is a box structure with a hollow rectangular top and no cover. A partition is provided inside the heat dissipation part, and the partition divides the inside 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 component, and the second heat dissipation cavity is located directly below the laser resonant cavity component and the laser output component. Baffle plates are symmetrically provided on the front and back sides of the first heat dissipation cavity. The outer sides of the two baffle plates and the side walls of the heat dissipation part together form two diversion cavities. A water inlet and a water outlet are also provided on the side walls of the heat dissipation part, and the water inlet and the water outlet are respectively connected to the two diversion cavities;

[0012] A flow diversion mechanism is provided inside the two flow diversion chambers, and the flow diversion mechanism is used to connect the flow diversion chamber with the first heat dissipation chamber or the second heat dissipation chamber.

[0013] Optionally, the top surface of the heat dissipation portion is flush with the top surfaces of the partition plate and the blocking plate, and the top surfaces of the heat dissipation portion, the partition plate and the blocking plate are all tightly fitted with the bottom surface of the shell.

[0014] Optionally, guide plates are alternately arranged on the left and right sides of the first heat dissipation cavity, and a plurality of heat dissipation fins are arranged on the bottom surface of the shell, and the plurality of heat dissipation fins extend into the first heat dissipation cavity and the second heat dissipation cavity respectively.

[0015] Optionally, the diverter mechanism includes a diverter ring, which is fixedly arranged on the inner bottom surface of the heat dissipation part, and the inner ring wall of the diverter ring is fitted with a sealing ring, and the side wall of the diverter ring and the sealing ring are jointly penetrated by a first through hole, and the outer wall of the diverter ring is also provided with a first conduit and a second conduit, the first conduit penetrates the baffle plate and extends into the area between the two baffle plates, and the second conduit penetrates the partition plate and extends into the second heat dissipation cavity; a rotating column is inserted into the diverter ring, and the rotating column is tightly fitted with the inner surface of the sealing ring, a vertical hole is opened on the top surface of the rotating column, and a diverter groove is opened on the outer surface of the rotating column, and a first guide hole and a second guide hole are symmetrically opened on both sides of the vertical hole, the first guide hole is connected with the first through hole, and the second guide hole is connected with the diverter groove.

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

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

[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 shell, and the sealing plate and the second sealing part are slidably matched.

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

[0020] Optionally, a water inlet hole is provided on the top surface of the sealing plate, a second through hole is provided on the side of the sealing plate facing the water inlet, and the second through hole is communicated with the water inlet hole; a third through hole and a fourth through hole are provided through the bottom wall of the shell, a heat dissipation channel is provided inside the rectangular box, and a water inlet pipe and a water outlet pipe communicated with the heat dissipation channel are provided on the bottom surface of the rectangular box, and the water inlet pipe and the water outlet pipe are respectively inserted into the third through hole and the fourth through hole; when the first conduit and the second conduit are both completely aligned with the diverter slot, the second through hole is located in the second sealing part, and one end of the sealing plate is located on the outside of the first sealing part; when the first conduit is completely aligned with the diverter slot and a part of the second conduit is aligned with the diverter slot, the two ends of the sealing plate are respectively located in the first sealing part and the second sealing part, and the water inlet hole is aligned with the third through hole.

[0021] The present invention also provides a high-power four-core common-cavity laser operating method, which is applicable to the above-mentioned high-power four-core common-cavity laser, and comprises the following steps:

[0022] Inject cold water into the heat dissipation unit through the water inlet, and discharge the circulating water in the heat dissipation unit through the water outlet to cool the shell;

[0023] In the initial state, the first conduit and the second conduit are both connected to the diverter slot, so the cold water entering the heat dissipation part can enter the first heat dissipation cavity and the second heat dissipation cavity at the same time, so as to evenly cool the shell;

[0024] After using it for a period of time, the adjusting screw can be turned to align the first conduit completely with the shunt slot, and a part of the second conduit with the shunt slot. At this time, most of the cold water will enter the first heat dissipation cavity, and a small part of the cold water will enter the heat dissipation channel inside the rectangular box, which is used to centrally cool the pump source component and the laser resonant cavity component;

[0025] Finally, when the use time continues to increase, the adjusting screw can be turned again to align the diverter slot only with the first conduit, so that the cold water can completely enter the first heat dissipation cavity, thereby cooling the pump source component alone.

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

[0027] 1. In the present invention, the heat dissipation part is divided into a first heat dissipation cavity and a second heat dissipation cavity. The diversion mechanism can control the cold water to enter the first heat dissipation cavity or the second heat dissipation cavity, so as to dissipate the heat of the internal components of the laser in a targeted manner. Compared with the prior art, the present invention also helps to improve the heat dissipation efficiency, thereby helping to improve the stability of the output light beam and the laser quality.

[0028] 2. The present invention also has a blocking plate. When the water inlet hole is aligned with the third through hole on the bottom wall of the shell, the cold water in the heat dissipation part can also enter the rectangular box, so that the present invention can dissipate heat for the laser resonant cavity assembly in a targeted manner, thereby fully ensuring the quality of the light beam output.

[0029] 3. The blocking plate and the rotating column in the present invention are linked to each other. When the user rotates the adjusting screw, the movement of the blocking plate and the rotation of the rotating column can be controlled simultaneously. Therefore, the present invention can facilitate the user to control the direction of the water flow in time, thereby controlling the heat dissipation priority of each component in the laser. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0032] Figure 3 A schematic diagram of a third through hole and a fourth through hole of the present invention;

[0033] Figure 4 This is a schematic diagram of the interior of the heat dissipation unit of the present invention;

[0034] Figure 5 A cross-sectional view of the first state of the interior of the heat dissipation part of the present invention;

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

[0036] Figure 7 A cross-sectional view of the interior of the heat dissipation part of the present invention in a third state;

[0037] Figure 8 It is an exploded schematic diagram of the diversion mechanism of the present invention;

[0038] Fig. 9 It is a schematic diagram of the structure of the adjustment part of the present invention;

[0039] Fig.10 This is a schematic diagram of the laser resonant cavity structure of the present invention;

[0040] Fig.11 for Figure 4 The corresponding figure at A is enlarged;

[0041] Fig.12 for Figure 5 The corresponding figure is enlarged at point B in the middle.

[0042] In the figure: 100, housing; 101, laser power interface; 102, third through hole; 103, third through hole; 200, pump source assembly; 201, semiconductor laser; 202, coupling head; 300, laser resonant cavity 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 part; 501, partition; 502, first heat dissipation cavity; 503, second heat dissipation cavity; 504, blocking plate; 505, diverter cavity; 506, water inlet; 507, water outlet; 508, guide Flow plate; 509, heat sink; 510, first sealing part; 511, second sealing part; 512, blocking plate; 513, adjusting screw; 514, connecting column; 515, driving part; 516, rack; 517, water inlet hole; 518, second through hole; 600, diversion mechanism; 601, diversion ring; 602, sealing ring; 603, first through hole; 604, first conduit; 605, second conduit; 606, rotating column; 607, vertical hole; 608, diversion slot; 609, first guide hole; 610, second guide hole; 611, blocking cover; 612, driven gear; 700, adjusting part. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1: Please refer to Figure 1 - Fig.12 A high-power four-core common cavity laser comprises a shell 100, wherein a pump source component 200, a laser resonant cavity component 300 and a laser output component 400 are arranged inside the shell 100, wherein the pump source component 200 comprises four semiconductor lasers 201 and four coupling heads 202, wherein the laser resonant cavity component 300 comprises a rectangular box 301 and four ceramic tubes 302 arranged inside the rectangular box 301, wherein a front cavity mirror, a laser rod and an output mirror are coaxially arranged inside the ceramic tube 302 in sequence, wherein the output end of the semiconductor laser 201 is connected to the corresponding coupling head 202 through an optical fiber, wherein the four coupling heads 202 emit laser light to the starting end of the corresponding ceramic tube 302 through an optical fiber, and the ends of the four ceramic tubes 302 are all connected to the laser output component 400 through optical fibers; in addition, a laser power interface 101 is also arranged on the side wall of the shell 100, wherein 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 a laser. The rear surface of the front cavity mirror and the front surface of the output mirror are plated with a high reflection film with a reflection wavelength of N microns. In the resonant cavity formed by the front cavity mirror and the output mirror, the laser with a wavelength of N microns and transmitted in the direction of the optical axis is amplified with the highest priority, while the light of other frequencies and directions is suppressed, and finally the laser with a wavelength of N microns is output from the output mirror. The four lasers enter the laser output component 400 through optical fibers respectively, and are emitted after being converged by the laser output component 400.

[0046] Furthermore, a heat dissipation portion 500 is provided on the bottom surface of the housing 100. Figure 4 As shown, the heat dissipation part 500 is a box structure with a hollow rectangular top and no cover. A partition 501 is provided inside the heat dissipation part 500. The partition 501 divides the inside of the heat dissipation part 500 into a first heat dissipation cavity 502 and a second heat dissipation cavity 503. 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 resonant cavity assembly 300 and the laser output assembly 400. Baffle plates 504 are symmetrically provided on the front and rear sides of the first heat dissipation cavity 502, and the outer side surfaces of the two baffle plates 504 and the side walls of the heat dissipation portion 500 together form two diversion cavities 505; specifically, the top surface of the heat dissipation portion 500 is flush with the partition plate 501 and the top surface of the baffle plate 504, and the top surfaces of the heat dissipation portion 500, the partition plate 501 and the baffle plate 504 are all tightly fitted with the bottom surface of the shell 100; in addition, the outer surface of the shell 100 and the outer surface of the heat dissipation portion 500 are provided with connecting ears, and the connecting ears on the shell 100 and the heat dissipation portion 500 are aligned and bolted and fixed.

[0047] More specifically, a water inlet 506 and a water outlet 507 are further provided on the side wall of the heat dissipation part 500, and the water inlet 506 and the water outlet 507 are respectively connected to the two diversion chambers 505; guide plates 508 are staggeredly arranged on the left and right sides of the first heat dissipation chamber 502, and a plurality of heat dissipation fins 509 are provided on the bottom surface of the housing 100, and the plurality of heat dissipation fins 509 are respectively extended into the first heat dissipation chamber 502 and the second heat dissipation chamber 503. In addition, the housing 100 and the heat dissipation fins 509 are an integrally formed structure, and the housing 100 is made of blackened aluminum alloy.

[0048] On the other hand, the two flow-dividing chambers 505 are both provided with a flow-dividing mechanism 600, which is used to connect the flow-dividing chamber 505 with the first heat-dissipating chamber 502 or the second heat-dissipating chamber 503. The flow-dividing mechanism 600 includes a flow-dividing ring 601, such as Fig.12As shown, the diverter ring 601 is fixedly arranged on the inner bottom surface of the heat dissipation part 500, and the inner ring wall of the diverter ring 601 is fitted with a sealing ring 602, and the sealing ring 602 is made of rubber material. The side wall of the diverter ring 601 and the sealing ring 602 are penetrated by a first through hole 603, and the outer wall of the diverter ring 601 is also provided with a first conduit 604 and a second conduit 605, and the first conduit 604 and the second conduit 605 are both connected to the inside of the diverter ring 601, wherein the first conduit 604 penetrates the blocking plate 504 and extends into the area between the two blocking plates 504, and the second conduit 605 penetrates the partition plate 501 and extends into the second heat dissipation cavity 503.

[0049] A rotating column 606 is inserted into the diverter ring 601. The rotating column 606 fits tightly with the inner surface of the sealing ring 602. A vertical hole 607 is provided on the top surface of the rotating column 606. A diverter groove 608 is provided on the outer surface of the rotating column 606. A first guide hole 609 and a second guide hole 610 are symmetrically provided on both sides of 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 diverter groove 608. A plugging cover 611 is bolted to the top of the diverter ring 601, and the bottom end of the plugging cover 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 conduit 604 and the second conduit 605 are both connected to the diverter groove 608. Fig.12 As shown, at this time, after the cold water enters the heat dissipation part 500 through the water 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 is finally discharged through the water outlet 507.

[0050] like Figure 5As shown, the first sealing part 510 and the second sealing part 511 are symmetrically arranged on the left and right sides of the interior of the second heat dissipation cavity 503. The first sealing part 510 and the second sealing part 511 are both composed of two plate-like structures. A blocking plate 512 is arranged between the first sealing part 510 and the second sealing part 511. The thickness of the blocking 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 arranged at one end of the blocking 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 part 500 and is threadedly connected thereto. 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 fitted with the inner bottom surface of the heat dissipation part 500, the top end of the blocking plate 512 is fitted with the bottom surface of the housing 100, and the blocking plate 512 and the second sealing part 511 are slidably matched. Therefore, when the adjusting screw 513 is rotated, the blocking plate 512 can be directly controlled to slide left and right. When the two ends of the blocking plate 512 are respectively inserted into the first sealing portion 510 and the second sealing portion 511, the cold water cannot pass through the blocking plate 512 and enter the other side of the blocking plate 512.

[0051] In addition, the bottom surface of the heat dissipation part 500 is provided with an adjustment part 700, and the adjustment part 700 is a rectangular hollow box structure, such as Fig. 9 As shown, the adjusting part 700 and the heat dissipation part 500 are connected and fixed by bolts, 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 provided with a driven gear 612, and the bottom surface of one end 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 the bottom wall of the heat dissipation part 500 and extends into the inner side of the adjusting part 700 and is provided with a driving part 515, the driving part 515 is Y-shaped, and racks 516 are provided on both sides of the outside of the driving part 515, and the two racks 516 are respectively meshed with the two driven gears 612. Therefore, when the blocking plate 512 moves left and right, the two rotating columns 606 can be indirectly controlled to rotate to a corresponding angle.

[0052] Furthermore, a water inlet hole 517 is provided on the top surface of the blocking plate 512, and a second through hole 518 is provided on the side of the blocking plate 512 and on the side facing the water inlet 506, and the second through hole 518 is connected to the water inlet hole 517; a third through hole 102 and a fourth through hole 103 are provided through the bottom wall of the housing 100, a heat dissipation channel 303 is provided inside the rectangular box 301, and a water inlet pipe 304 and a water outlet pipe 304 connected to the heat dissipation channel 303 are provided on the bottom surface of the rectangular box 301. The water inlet pipe 304 and the water outlet pipe 305 are inserted into the third through hole 102 and the fourth through hole 103 respectively; when the first conduit 604 and the second conduit 605 are completely aligned with the diverter slot 608, the second through hole 518 is located in the second sealing portion 511, and one end of the blocking plate 512 is located outside the first sealing portion 510; when the first conduit 604 is completely aligned with the diverter slot 608, and a part of the second conduit 605 is aligned with the diverter slot 608, as shown in FIG. Figure 7 In the state shown, at this time, both ends of the blocking plate 512 are respectively located in the first sealing portion 510 and the second sealing portion 511 , and the water inlet hole 517 is aligned with the third through hole 102 .

[0053] Embodiment 2: This embodiment also proposes a high-power four-core common-cavity laser working method, which is applicable to the above-mentioned high-power four-core common-cavity laser, and includes 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, the first conduit 604 and the second conduit 605 are both connected to the diverter slot 608, so the cold water entering the heat dissipation portion 500 can enter the first heat dissipation cavity 502 and the second heat dissipation cavity 503 at the same time, which is used to evenly cool the shell; in this state, Figure 5 As shown, one end of the sealing plate 512 is pulled out from the first sealing portion 510, so that the water flow can flow along an S shape in the second heat dissipation cavity 503, which is used to increase the cooling effect of the water flow. Secondly, since the sealing plate 512 is in contact with the bottom surface of the shell 100, the sealing plate 512 can also be used as a heat-conducting cooling medium for the shell 100.

[0056] After a period of use, the adjusting screw 513 can be rotated to align the first conduit 604 completely with the diverter slot 608 and a portion of the second conduit 605 with the diverter slot 608. Figure 7In the state shown, most of the cold water will enter the first heat dissipation cavity 502, and a small amount of cold water will enter the heat dissipation channel 303 inside the rectangular box 301, which is used to centrally cool the pump source component 200 and the laser resonant cavity component 300; it should be noted that since the pump source and the resonant cavity in the laser generate more heat, after a period of use, in order to improve the heat dissipation efficiency, the two need to be centrally cooled.

[0057] Finally, when the usage time continues to increase, the adjusting screw 513 can be rotated again to make the diverter slot 608 only align with the first conduit 604, such as Figure 6 In the state shown, the cold water can completely enter the first heat dissipation cavity 502, thereby cooling the pump source assembly 200 separately. It should be noted that since the heat generation of the pump source in the laser is the most serious, the temperature of the pump source will become higher and higher with the increase of the use time. Therefore, in order to avoid the pump source from being damaged due to severe heat generation, the diversion mechanism 600 can be adjusted to Figure 6 In the state shown, cold water completely enters the first heat dissipation cavity 502 , thereby fully improving the heat dissipation efficiency of the pump source assembly 200 .

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

Claims

1. A high-power four-core common-cavity laser, comprising a housing (100), characterized in that: A pump source component (200), a laser resonant cavity component (300) and a laser output component (400) are arranged inside the housing (100); the pump source component (200) comprises four semiconductor lasers (201) and four coupling heads (202); the laser resonant cavity component (300) comprises a rectangular box (301) and four ceramic tubes (302) arranged inside the rectangular box (301); a front cavity mirror, a laser rod and an output mirror are coaxially arranged in sequence inside the ceramic tube (302); 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 light to the starting end of the corresponding ceramic tube (302) through the optical fiber; and the ends of the four ceramic tubes (302) are connected to the laser output component (400) through the optical fiber; A heat dissipation portion (500) is provided on the bottom surface of the housing (100), and the heat dissipation portion (500) is a box structure with a rectangular hollow top and no cover. A partition (501) is provided inside the heat dissipation portion (500), and the partition (501) divides the inside of the heat dissipation portion (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), and the second heat dissipation cavity (503) is located at the bottom of the laser resonant cavity assembly. Directly below the component (300) and the laser output component (400), blocking plates (504) are symmetrically provided on the front and rear sides of the first heat dissipation cavity (502), the outer side surfaces of the two blocking plates (504) and the side walls of the heat dissipation portion (500) together form two diversion cavities (505), and the side walls of the heat dissipation portion (500) are also 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 diversion cavities (505); A flow diversion mechanism (600) is provided inside each of the two flow diversion chambers (505), and the flow diversion mechanism (600) is used to connect the flow diversion chamber (505) with the first heat dissipation chamber (502) or the second heat dissipation chamber (503).

2. A high-power four-core common-cavity laser according to claim 1, characterized in that: The top surface of the heat dissipation portion (500) is flush with the top surfaces of the partition (501) and the blocking plate (504); and the top surfaces of the heat dissipation portion (500), the partition (501) and the blocking plate (504) are all tightly fitted with the bottom surface of the shell (100).

3. The high-power four-core common-cavity laser according to claim 1, characterized in that: Guide plates (508) are alternately arranged on the left and right sides of the first heat dissipation cavity (502), and a plurality of heat dissipation fins (509) are arranged on the bottom surface of the shell (100), and the plurality of 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 according to claim 1, characterized in that: The flow diversion mechanism (600) comprises a flow diversion ring (601), the flow diversion ring (601) is fixedly arranged on the inner bottom surface of the heat dissipation part (500), the inner ring wall of the flow diversion ring (601) is fitted with a sealing ring (602), the side wall of the flow diversion ring (601) and the sealing ring (602) are penetrated by a first through hole (603), the outer side wall of the flow diversion ring (601) is further provided with a first conduit (604) and a second conduit (605), the first conduit (604) penetrates the blocking plate (504) and extends into the area between the two blocking plates (504), the second conduit (605) penetrates the partition plate (504) and extends into the area between the two blocking plates (504), and the second conduit (605) penetrates the partition plate (504). 1) and extends into the second heat dissipation cavity (503); a rotating column (606) is inserted into the interior of the diverter ring (601), the rotating column (606) is tightly fitted with the inner surface of the sealing ring (602), a vertical hole (607) is opened on the top surface of the rotating column (606), a diverter groove (608) is opened on the outer surface of the rotating column (606), and a first guide hole (609) and a second guide hole (610) are symmetrically opened on both sides of the interior of 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 diverter groove (608).

5. The high-power four-core common-cavity laser according to claim 4, characterized in that: The top end of the diverter ring (601) is detachably connected to a blocking cover (611), and the bottom end of the blocking cover (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 conduit (604) and the second conduit (605) are both connected to the diverter groove (608).

6. The high-power four-core common-cavity laser according to claim 5, characterized in that: A first sealing portion (510) and a second sealing portion (511) are symmetrically arranged on the left and right sides of the interior of the second heat dissipation cavity (503); the first sealing portion (510) and the second sealing portion (511) are both composed of two plate-like structures; a sealing plate (512) is arranged between the first sealing portion (510) and the second sealing portion (511); the thickness of the sealing plate (512) is adapted to the internal gap between the first sealing portion (510) and the second sealing portion (511); an adjusting screw (513) is rotatably arranged at one end of the sealing plate (512) located inside the second sealing portion (511); the outer end of the adjusting screw (513) passes through the side wall of the heat dissipation portion (500) and is threadedly connected thereto.

7. The high-power four-core common-cavity laser according to claim 6, characterized in that: The top ends of the first sealing portion (510) and the second sealing portion (511) are flush with the top surface of the heat dissipation portion (500), the bottom end of the sealing plate (512) is in contact with the inner bottom surface of the heat dissipation portion (500), the top end of the sealing plate (512) is in contact with the bottom surface of the shell (100), and the sealing plate (512) and the second sealing portion (511) are in sliding cooperation.

8. The high-power four-core common-cavity laser according to claim 7, characterized in that: 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 the bottom wall of the heat dissipation part (500) and extend into the inner side of the adjusting part (700) and are provided with a driven gear (612), and the bottom surface of one end of the sealing 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 the bottom wall of the heat dissipation part (500) and extends into the inner side of the adjusting part (700) and is provided with a driving part (515), the driving part (515) is Y-shaped, and racks (516) are provided on both sides of the outside of the driving part (515), and the two racks (516) are respectively meshed with the two driven gears (612).

9. The high-power four-core common-cavity laser according to claim 8, characterized in that: A water inlet hole (517) is provided on the top surface of the blocking plate (512), and a second through hole (518) is provided on the side of the blocking plate (512) facing the water inlet (506), and the second through hole (518) is communicated with the water inlet hole (517); a third through hole (102) and a fourth through hole (103) are provided through the bottom wall of the shell (100), a heat dissipation channel (303) is provided inside the rectangular box (301), and a water inlet pipe (304) and a water outlet pipe (305) which are communicated with the heat dissipation channel (303) are provided on the bottom surface of the rectangular box (301), and 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). The water inlet (517) is located in the first through hole (102) and the fourth through hole (103); when the first conduit (604) and the second conduit (605) are both completely aligned with the diverter groove (608), the second through hole (518) is located in the second sealing portion (511), and one end of the blocking plate (512) is located outside the first sealing portion (510); when the first conduit (604) is completely aligned with the diverter groove (608) and a part of the second conduit (605) is aligned with the diverter groove (608), the two ends of the blocking plate (512) are respectively located in the first sealing portion (510) and the second sealing portion (511), and the water inlet hole (517) is aligned with the third through hole (102).

10. A high-power four-core common-cavity laser operating method, applicable to the high-power four-core common-cavity laser according to claim 9, characterized in that: The steps include: Injecting cold water into the heat dissipation portion (500) through the water inlet (506), and discharging circulating water in the heat dissipation portion (500) through the water outlet (507) to cool the housing (100); In the initial state, the first conduit (604) and the second conduit (605) are both connected to the diverter groove (608), so that the cold water entering the heat dissipation portion (500) can enter the first heat dissipation cavity (502) and the second heat dissipation cavity (503) at the same time, so as to evenly cool the shell; After a period of use, the adjusting screw (513) can be rotated to align the first conduit (604) completely with the diverter slot (608) and a portion of the second conduit (605) with the diverter slot (608). At this time, most of the cold water will enter the first heat dissipation cavity (502), and a small amount of cold water will enter the heat dissipation channel (303) inside the rectangular box (301), so as to centrally cool the pump source component (200) and the laser resonant cavity component (300). Finally, when the usage time continues to increase, the adjusting screw (513) can be rotated again to align the diverter groove (608) only with the first conduit (604), so that the cold water can completely enter the first heat dissipation cavity (502), thereby cooling the pump source component (200) alone.

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