Laser pumping radiator and laser pumping device thereof

Abstract

The utility model provides a laser pumping radiator and a laser pumping device thereof, the laser pumping radiator comprises a water-cooling plate, a water-cooling seat and a water-cooling assembly, the water-cooling plate is provided with a diversion channel composed of diversion walls, the water-cooling plate is connected on the water-cooling seat in a covering manner, so that the diversion channel is arranged between the water-cooling plate and the water-cooling seat, and the diversion wall is arranged between the water-cooling plate and the water-cooling seat. The water-cooling base defines a closed space and accommodates the flow guide channel, the water-cooling base is provided with a water inlet nozzle and a water outlet nozzle which are communicated with the closed space, the water inlet nozzle and the water outlet nozzle are in butt joint with a water inlet and a water outlet of the flow guide channel respectively, and the water inlet nozzle and the water outlet nozzle are connected into the water-cooling assembly respectively so as to introduce a water-cooling medium into the closed space. And the water circulates in the flow guide channel.

Description

Technical Field

[0001] The utility model relates to the technical field of laser pumping, in particular to a laser pumping radiator adopting a water cooling solution and a laser pumping device thereof. Background Art

[0002] A pump laser is a device that excites a gain medium with laser light of a specific wavelength, thereby generating a higher-power laser. Pump lasers are typically fiber-coupled to introduce external light energy into the laser system, causing the number of excited atoms or molecules to exceed that of the ground state, resulting in a population inversion.

[0003] For example, in optically pumped solid-state lasers, the wavelength of the excitation light must match the absorption spectrum of the gain medium. Commonly used pump sources include semiconductor lasers, which can generate light of a specific wavelength to more efficiently excite the gain medium. Semiconductor-pumped solid-state lasers (DPSS) utilize semiconductor lasers as pump sources and offer higher electro-optical conversion efficiency than traditional lamp-pumped lasers, thereby improving the laser's output beam quality.

[0004] However, when a semiconductor pump laser is working, part of the energy will be converted into heat during the energy conversion inside the laser. If the heat cannot be dissipated in time, it will cause the temperature to rise and cause overheating, which will have a corresponding impact on the performance of the laser, such as reducing the laser output power and efficiency, shortening the laser life, and affecting the laser stability.

[0005] Therefore, how to effectively solve the overheating phenomenon is the key to improving the performance of semiconductor pump lasers. Utility Model Content

[0006] Therefore, the main purpose of the present invention is to provide a laser pumping radiator and a laser pumping device thereof, so as to improve the overheating phenomenon mentioned in the background technology.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present utility model, a laser pump radiator is provided, which includes: a water-cooling plate, a water-cooling seat, and a water-cooling assembly, wherein the water-cooling plate is provided with a guide channel composed of a guide wall, the water-cooling plate cover is connected to the water-cooling seat to define a closed space between the water-cooling plate and the water-cooling seat and to accommodate the guide channel, the water-cooling seat is provided with a water inlet and a water outlet connected to the closed space, and the water inlet and the water outlet are respectively connected to the water inlet and the water outlet of the guide channel, the water inlet and the water outlet are respectively connected to the water-cooling assembly to introduce water-cooling medium into the closed space and circulate in the guide channel.

[0008] Preferably, the diversion channel includes: an introduction unit, a diversion unit, and an outlet unit, wherein the introduction unit and the outlet unit are respectively connected to the water inlet and the water outlet, and the diversion unit includes several main diversion channels and secondary diversion channels, wherein the water inlet and the water outlet of each main diversion channel are respectively connected to the introduction unit and the outlet unit, and the water inlet and the water outlet of the secondary diversion channel are connected to the end section of the outlet unit.

[0009] Preferably, a plurality of guide fins are provided in the channel of the introduction unit, wherein the guide fins are arranged at intervals to partially separate the channel of the introduction unit at least in the front and middle sections of the introduction unit channel, wherein guide teeth are provided on the top wall of the channel of the introduction unit, and the guide teeth are located at the intervals between the guide fins.

[0010] Preferably, diversion fins are respectively provided at the water inlet and outlet of each of the main diversion channels, wherein the main diversion channels are arranged horizontally, and according to the different front and back arrangement positions, the diversion fins of each of the main diversion channels are arranged from low to high to form a drop.

[0011] Preferably, the water inlet of the introduction unit is provided with a diversion ramp at the joint with the water inlet nozzle, so as to gradually reduce the diameter between the water inlet nozzle and the water inlet, thereby reducing the cross-sectional area through which the water-cooling medium passes.

[0012] Preferably, the main diversion channel includes several transversely arranged unit water channels, and each of the unit water channels is arranged longitudinally and connected end to end to form an S-shaped water channel, wherein guide walls are arranged at intervals in each of the unit water channels to separate the unit water channels, and the side walls of each of the unit water channels impacted by the water-cooling medium flow are wavy.

[0013] Preferably, a partition wall connected to the bottom wall of the outlet unit is provided in the secondary diversion channel, so that the secondary diversion channel is arranged longitudinally as an n-type water channel, and guide walls are arranged at intervals in the secondary diversion channel to separate the water channels, wherein guide teeth are provided on the side walls of the secondary diversion channel impacted by the water-cooling medium flow.

[0014] Preferably, the bottom wall of the outlet unit near the water outlet of the secondary diversion channel is inclined and sunken, and the connection between the bottom wall and the partition wall is an arc-shaped transition, thereby defining a drainage slope.

[0015] Preferably, heat-conducting columns are arranged at intervals in the water channels of the introduction unit and the outlet unit.

[0016] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a laser pumping device is provided, which includes: a laser pumping source, which also includes a laser pumping radiator as described above, wherein the laser pumping radiator is matched with the laser pumping source to provide water cooling for the laser pumping source.

[0017] The laser pump radiator and laser pump device provided by the present invention cleverly design a water-cooling heat dissipation structure, which ensures the water flow intensity and flow rate of the water channel through the reasonable design and arrangement of the diversion channel, and improves the pressure resistance inside the water channel, ensuring that the water channel will not be deformed under a certain water pressure, thereby improving the water cooling efficiency and improving the overheating phenomenon, so as to ensure the laser output power, efficiency and stability, thereby extending the life of the product using the water-cooling heat dissipation solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the assembly structure of the laser pump radiator of the utility model;

[0020] Figure 2 This is a schematic diagram of a half-section structure of the laser pump radiator of the present utility model;

[0021] Figure 3 for Figure 2 The enlarged structural diagram of the middle C circle;

[0022] Figure 4 This is the flow distribution diagram in the water-cooling plate of the laser pump radiator of the utility model;

[0023] Figure 5 This is a working temperature measurement diagram of the laser pump radiator of the utility model after being equipped with a pump source.

[0024] Description of Reference Numerals

[0025] Water-cooling plate 1, water-cooling seat 2, guide channel 3, heat-conducting column 4, heat-conducting tooth group 5, water inlet nozzle 21, water outlet nozzle 22, introduction unit 31, diversion unit 32, outlet unit 33, guide ramp 311, guide fin 312, main diversion channel 321, partition wall 323, guide tooth 324, diversion fin 325, diversion slope 326, secondary diversion channel 322, unit water channel 3211, guide wall 3212. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0031] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "layout", "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with the existing technology according to the specific circumstances. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other unless there is a conflict. And one or more of the components in the diagram may be necessary or non-essential, and the relative positional relationship between the components in the above diagram can be adjusted according to actual needs.

[0032] In order to improve the over-temperature phenomenon of the pump laser, such as Figures 1 to 3 As shown, the present invention provides a laser pump radiator for use with a laser pump source for water cooling and heat dissipation. The laser pump radiator example includes: a water cooling plate 1, a water cooling seat 2, and a water cooling assembly. The water cooling assembly can adopt existing technical solutions, such as including: a liquid pump, a heat dissipation water drain, etc., to support the circulation of a water-cooled medium through a pipe connection and to exchange heat with the heat dissipation water drain. The water cooling plate 1 is provided with a guide channel 3 composed of a guide wall. The water cooling plate 1 is covered on the water cooling seat 2 to define a closed space between the water cooling plate 1 and the water cooling seat 2 and to accommodate the guide channel 3. The water cooling seat 2 is provided with a water inlet 21 and a water outlet 22 that are connected to the closed space. The water inlet 21 and the water outlet 22 are respectively connected to the water inlet and the water outlet of the guide channel 3. The water inlet 21 and the water outlet 22 are respectively connected to the water cooling assembly to introduce the water cooling medium into the closed space and circulate it in the guide channel 3.

[0033] Specifically, in order to ensure the water cooling heat dissipation effect, the water cooling guide channel 3 must be reasonably arranged to more effectively exchange heat with the heat source. Figure 2 As shown, in this example, the guide channel 3 preferably includes: an introduction unit 31, a diversion unit 32, and an outlet unit 33, wherein the introduction unit 31 and the outlet unit 33 are respectively connected to the water inlet 21 and the water outlet 22, and the diversion unit 32 includes a plurality of main diversion channels 321 and secondary diversion channels 322, wherein the water inlet and the water outlet of each main diversion channel 321 are respectively connected to the introduction unit 31 and the outlet unit 33, and the water inlet and the water outlet of the secondary diversion channel 322 are connected to the end section of the outlet unit 33, thereby forming a water-cooling flow channel that evenly shuttles through various places in the enclosed space.

[0034] Among them, in order to accelerate the water flow rate of the water-cooling medium entering the guide channel 3, in a preferred embodiment, the water inlet of the introduction unit 31 is provided with a guide ramp 311 at the connection point with the water inlet nozzle 21, so as to gradually narrow the diameter between the water inlet nozzle 21 and the water inlet of the introduction unit 31, reduce the cross-sectional area through which the water-cooling medium passes, and enable the water flow from the circular mouth of the water inlet to quickly enter the flat water channel, thereby reducing the cross-sectional area of ​​the water flow, increasing the flow rate of the water flow, and enabling the water flow to quickly enter the introduction unit 31.

[0035] Furthermore, since the heat source of a general laser pump source is relatively concentrated and radiates from the center to the surroundings, Figure 2As shown, in this example, the main diversion channel 321 is designed to include several transversely arranged unit water channels 3211, and each of the unit water channels 3211 is arranged longitudinally and connected end to end to form an S-shaped water channel, so as to evenly cover a large area. At the same time, in each of the unit water channels 3211, guide walls 3212 are preferably arranged at intervals to separate the unit water channels 3211, so as to increase the heat conduction area here, thereby increasing the exchange area between the water-cooling medium and its heat.

[0036] Among them, it is worth mentioning that Figures 4 and 5 As shown, corresponding to the laser pump source of this example, it is preferred that the position of each LD pump source be designed to correspond to the water channel 3211 of each unit during design, so as to improve the water cooling and heat dissipation effect.

[0037] In addition, it was observed that when the water flow velocity was high, the wall surface at the corner of each unit water channel 3211 was prone to impact with the water flow, thereby forming a turbulent flow and increasing the internal pressure of the water channel, which could easily cause problems such as water channel deformation. Figure 3 As shown, in a preferred embodiment, the side walls of each unit water channel 3211 impacted by the water-cooling medium flow can be set to be wavy, thereby reducing the impact of the water flow on the water channel wall here, thereby improving the pressure resistance inside the water channel and avoiding damage to the water channel due to increased water pressure.

[0038] Furthermore, considering that the main diversion channel 321 covers a wider area and the flow rate during water discharge is larger, in order to improve the congestion of water discharge from the main diversion channel 321 as much as possible, while maintaining unobstructed drainage of the outlet unit 33 and increasing the coverage range of the guide channel 3 as much as possible, in a preferred embodiment, a partition wall 323 connected to the bottom wall of the outlet unit 33 is provided in the secondary diversion channel 322, so that the secondary diversion channel 322 is longitudinally arranged as an n-type water channel, and the opening area of ​​the water inlet and outlet of the n-type water channel is equivalent to the sum of the bottom outlet areas of each row of main diversion channels 321.

[0039] Furthermore, in an optional embodiment, guide walls 3212 may be spaced apart within the secondary diversion channel 322 to separate the water channel, thereby increasing the heat transfer area there and, in turn, the heat exchange area between the water-cooling medium and the water. Guide teeth 324 are also provided on the sidewalls of the secondary diversion channel 322 impacted by the water-cooling medium flow. This reduces the impact of the water flow on the channel walls, thereby improving the internal pressure resistance of the water channel and preventing damage to the water channel due to increased water pressure.

[0040] Furthermore, since the main diversion channel 321 mentioned above has a wide distribution range, in order to be able to differentiate the water flow and to evenly transport the water-cooling medium to the deeper main diversion channel 321, in an optional embodiment, a plurality of guide fins 312 can be set in the channel of the introduction unit 31, wherein the guide fins 312 are arranged at intervals to partially separate the channel of the introduction unit 31 at least in the front and middle sections of the channel of the introduction unit 31, thereby differentiating the water flow distribution in the introduction unit 31, diverting the front-end water flow, and reducing the flow of the front-end water flow entering the first few main diversion channels 321, so that each main diversion channel 321 can obtain a more balanced flow.

[0041] In addition, in order to better control the water flow, in an optional embodiment, a guide tooth 324 is provided on the top wall of the channel of the introduction unit 31, and the guide tooth 324 is located at the interval of the guide fin 312, so as to disturb the water flow, which is more conducive to guiding the water flow to the water inlet of the main diversion channel 321 after diversion.

[0042] Furthermore, in order to better introduce the water flow in the introduction unit 31 into the main diversion channel 321, and also to better introduce the outlet water of each main diversion channel 321 into the outlet unit 33, in an optional example, each of the main diversion channels 321 is provided with a diversion fin 325 at the water inlet and the water outlet, wherein each main diversion channel 321 is arranged horizontally, and according to the different front and back arrangement positions, the diversion fins 325 of each main diversion channel 321 are arranged from low to high to form a drop, so as to ensure the consistency of the water flow rate of each main diversion channel 321.

[0043] Furthermore, considering that the outlet flow of the secondary diversion channel 322 is large, or after colliding with the bottom wall of the outlet unit 33, the internal water pressure will increase and even the waterway will be damaged, for this reason, in an optional embodiment, the bottom wall of the outlet unit 33 near the outlet of the secondary diversion channel 322 is preferably designed to be inclined and sunken, and the connection between its bottom wall and the partition wall 323 is an arc-shaped transition, thereby defining a diversion slope 326, so that through the diversion slope 326, the water flow can be better guided and buffered, the water pressure can be stabilized, and the impact force of the water flow at this location can be reduced, so as to guide the outlet unit 33 and quickly discharge it to the water outlet 22.

[0044] Furthermore, in order to increase the heat conduction area in a local area and improve the heat exchange area of ​​the water flow to the partial area, in an optional embodiment, heat conduction columns 4 are arranged at intervals in the water channels of the introduction unit 31 and the outlet unit 33.

[0045] In addition, if there are points with relatively prominent heat in some areas of the water channel of the introduction unit 31 and the outlet unit 33, a heat-conducting tooth group 5 can be set, and the height of the heat-conducting tooth group 5 is lower than the guide wall. In this way, while ensuring the stability of the local water flow, the heat exchange area is increased, thereby improving the heat dissipation effect.

[0046] On the other hand, the present invention also provides a laser pumping device, which includes: a laser pumping source, which also includes any laser pumping radiator as described in the above examples, wherein the laser pumping source is attached to the water cooling seat 2 of the laser pumping radiator for water cooling and heat dissipation.

[0047] In summary, the laser pump radiator and its laser pump device provided by the present invention cleverly design a water-cooling heat dissipation structure, which ensures the water flow intensity and flow rate of the water channel through the reasonable design and arrangement of the guide channel 3, and improves the pressure resistance inside the water channel, ensuring that the water channel will not be deformed under a certain water pressure, thereby improving the water cooling efficiency and improving the overheating phenomenon, so as to ensure the laser output power, efficiency and stability, thereby improving the product life of the water-cooling heat dissipation solution.

[0048] The preferred embodiments of the utility model disclosed above are only used to help illustrate the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only the specific implementation methods described. Obviously, many modifications and changes can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technical personnel in the relevant technical field can well understand and utilize the utility model. The utility model is only limited by the claims and their full scope and equivalents. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

[0049] In addition, the various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A laser pump radiator, characterized in that: include: A water-cooling plate, a water-cooling seat, and a water-cooling assembly, wherein the water-cooling plate is provided with a guide channel composed of a guide wall, the water-cooling plate cover is connected to the water-cooling seat to define a closed space between the water-cooling plate and the water-cooling seat and to accommodate the guide channel, the water-cooling seat is provided with a water inlet and a water outlet connected to the closed space, and the water inlet and the water outlet are respectively connected to the water inlet and the water outlet of the guide channel, the water inlet and the water outlet are respectively connected to the water-cooling assembly to introduce water-cooling medium into the closed space and circulate in the guide channel.

2. The laser pump radiator according to claim 1, characterized in that: The diversion channel includes: an introduction unit, a diversion unit, and an outlet unit, wherein the introduction unit and the outlet unit are respectively connected to the water inlet and the water outlet, and the diversion unit includes several main diversion channels and secondary diversion channels, wherein the water inlet and the water outlet of each main diversion channel are respectively connected to the introduction unit and the outlet unit, and the water inlet and the water outlet of the secondary diversion channel are connected to the end section of the outlet unit.

3. The laser pump radiator according to claim 2, characterized in that: A plurality of guide fins are provided in the channel of the introduction unit, wherein the guide fins are arranged at intervals to partially separate the channel of the introduction unit at least in the front and middle sections of the introduction unit channel, wherein guide teeth are provided on the top wall of the channel of the introduction unit, and the guide teeth are located at the intervals between the guide fins.

4. The laser pump radiator according to claim 2, characterized in that: Diverter fins are respectively provided at the water inlet and outlet of each main diverter channel, wherein the main diverter channels are arranged horizontally, and according to the different front and back arrangement positions, the diverter fins of each main diverter channel are arranged from low to high to form a drop.

5. The laser pump radiator according to claim 2, characterized in that: The water inlet of the introduction unit is provided with a diversion ramp at the joint with the water inlet nozzle, so as to gradually reduce the diameter between the water inlet nozzle and the water inlet, thereby reducing the cross-sectional area through which the water-cooling medium passes.

6. The laser pump radiator according to claim 2, characterized in that: The main diversion channel includes several transversely arranged unit water channels, and each of the unit water channels is arranged longitudinally and connected end to end to form an S-shaped water channel, wherein guide walls are arranged at intervals in each of the unit water channels to separate the unit water channels, and the side walls of each of the unit water channels impacted by the water-cooling medium flow are wavy.

7. The laser pump radiator according to claim 2, characterized in that: A partition wall connected to the bottom wall of the outlet unit is provided in the secondary diversion channel, so that the secondary diversion channel is arranged longitudinally as an n-shaped water channel. Guide walls are arranged at intervals in the secondary diversion channel to separate the water channels, and guide teeth are provided on the side walls of the secondary diversion channel that are impacted by the water-cooling medium flow.

8. The laser pump radiator according to claim 7, characterized in that: The bottom wall of the outlet unit near the outlet of the secondary diversion channel is inclined and sunken, and the connection between the bottom wall and the partition wall is an arc-shaped transition, thereby defining a drainage slope.

9. The laser pump radiator according to claim 2, characterized in that: Heat-conducting columns are arranged at intervals in the water channels of the introduction unit and the outlet unit.

10. A laser pumping device comprising: The laser pump source is characterized in that it further comprises a laser pump radiator according to any one of claims 1 to 9, wherein the laser pump radiator is matched with the laser pump source to provide water cooling for the laser pump source.

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