Laser engraver system

Abstract

This invention discloses a laser burn-in system, relating to the field of laser burn-in technology. The laser burn-in system includes a burn-in component, a beam-uniforming and expanding module, a photoelectric conversion component, and a power processing module. The burn-in component is connected to the laser. The beam-uniforming and expanding module receives the laser beam and outputs a uniformly diffused beam. The photoelectric conversion component receives the uniformly diffused beam and outputs power to be processed. The power processing module is electrically connected to the photoelectric conversion component and receives the power to be processed and outputs usable power. The technical solution provided by this invention aims to reduce the total energy consumption of laser burn-in by converting the light energy during burn-in into reusable electrical energy, thereby reducing the total energy consumption and cost of burn-in.

Description

Technical Field

[0001] This invention relates to the field of laser burn-in technology, and in particular to a laser burn-in system. Background Technology

[0002] Laser burn-in, also known as long-term continuous operation testing, is used to verify the performance stability, thermal management capabilities, and reliability of a laser under continuous operating conditions. This process typically requires continuous monitoring or periodic testing of optical parameters, which may include: output power, beam quality (such as M² factor and beam profile), center wavelength, or spectral stability.

[0003] Currently, the solution for continuous fiber laser burn-in involves connecting the laser fiber optic cable to the burn-in fixture, allowing continuous light output for several hours. Since the laser emitted is a high-energy Gaussian beam, it requires processing. Typically, the burn-in solution converts the light energy into heat energy for dissipation. The generated laser energy needs to be absorbed by an absorber within the burn-in fixture, which is then equipped with a cooling component to cool the absorber.

[0004] Existing stress testing systems have the following problems: the laser stress testing process consumes a lot of energy; the high laser energy requires high cooling efficiency from the cooling components, further increasing the stress testing energy consumption. Summary of the Invention

[0005] The main objective of this invention is to propose a laser burn-in system that aims to reduce the total energy consumption of laser burn-in by converting the light energy during burn-in into reusable electrical energy, thereby reducing the total energy consumption and cost of burn-in.

[0006] To achieve the above objectives, the present invention proposes a laser burning system, comprising:

[0007] Burn-in kit, used to connect to the laser; The beam-splitting module is used to receive the laser beam and output a uniformly diffused beam. Photoelectric conversion component, used to receive a uniformly diffused light beam and output electrical energy to be processed; and, The power processing module is electrically connected to the photoelectric conversion component and is used to receive power to be processed and output usable power.

[0008] In one embodiment, the burn-in component includes: A beam splitter receives the laser beam and splits it into a test beam and a recovery beam, the recovery beam being used to illuminate the homogenizing and beam-expanding module; and... The optical detection unit is used to receive and test the light beam under test.

[0009] In one embodiment, the laser burning system includes: A current tester is used to test the operating current of a laser; and, A controller is used to electrically connect the current tester and calculate the power of the laser.

[0010] In one embodiment, the beam-uniforming and beam-expanding module includes: A beam homogenizer for receiving a laser beam and converting it into a flat-top beam; and, A beam expander is used to receive a flat-top beam and diffuse it into a uniformly diffused beam.

[0011] In one embodiment, the beam homogenizer and beam expander module includes a protective housing with an inner cavity. The beam homogenizer and the beam expander are disposed in the inner cavity. The protective housing is provided with an entrance for the laser beam to enter and an exit for uniformly diffusing the beam output.

[0012] In one embodiment, the laser burn-in system includes a cooling assembly for cooling the photoelectric conversion assembly.

[0013] In one embodiment, the cooling assembly includes a coolant circulation pipe connected to the photoelectric conversion assembly.

[0014] In one embodiment, the power processing module includes: A voltage regulator is used for electrical connection to the photoelectric conversion component; An inverter for electrically connecting the voltage regulator; and, A grid-connected control cabinet is used to electrically connect the inverter to output usable electrical energy.

[0015] In one embodiment, the laser burn-in system includes a plurality of burn-in components, each of which is provided with a beam-scaling module. The photoelectric conversion component is used to receive the uniformly diffused beams output by the plurality of beam-scaling modules and output usable electrical energy.

[0016] In one embodiment, the photoelectric conversion component includes a monochromatic photovoltaic cell, which comprises gallium arsenide material or gallium indium arsenide ternary compound material.

[0017] This technical solution involves sequentially passing the laser beam generated during the burn-in process through a uniform beam expanding module for homogenization and energy diffusion, forming a uniformly diffused beam usable by the photoelectric conversion component. The photoelectric conversion component then efficiently converts the light energy of this beam into electrical energy to be processed. Finally, the electrical energy is processed by an energy processing module to convert it into directly usable electrical energy. This design not only achieves effective recovery and reuse of light energy during laser burn-in, avoiding energy waste in traditional burn-in processes and reducing energy consumption and burn-in costs, but also ensures uniform energy distribution of the beam received by the photoelectric conversion component through the uniform beam expanding module, improving energy conversion efficiency and stability, and guaranteeing the reliability and economy of the entire system operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the laser burning system provided by the present invention; Figure 2 This is a schematic diagram of another embodiment of the laser burning system provided by the present invention; Figure 3 This is a schematic diagram of another embodiment of the laser burning system provided by the present invention.

[0020] Explanation of icon numbers: 1. Burn-in component; 11. Beam splitter; 12. Optical detection unit; 13. Connector; 2. Beam homogenizer and beam expander module; 21. Beam homogenizer; 22. Beam expander; 23. Protective housing; 231. Inner cavity; 232. Inlet; 233. Outlet; 3. Monochromatic photovoltaic cells; 4. Power processing module; 41. Voltage regulator; 42. Inverter; 43. Grid connection control cabinet; 5. Control power supply; 6. Optical cable head; 7. Coolant circulation pipe; 8. Laser.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, and back), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] Laser burn-in, also known as long-term continuous operation testing, is used to verify the performance stability, thermal management capabilities, and reliability of a laser under continuous operating conditions. This process typically requires continuous monitoring or periodic testing of optical parameters, which may include: output power, beam quality (such as M² factor and beam profile), center wavelength, or spectral stability.

[0026] Currently, the solution for continuous fiber laser burn-in involves connecting the laser fiber optic cable to the burn-in fixture, allowing continuous light output for several hours. Since the laser emitted is a high-energy Gaussian beam, it requires processing. Typically, the burn-in solution converts the light energy into heat energy for dissipation. The generated laser energy needs to be absorbed by an absorber within the burn-in fixture, which is then equipped with a cooling component to cool the absorber.

[0027] Existing stress testing systems have the following problems: the laser stress testing process consumes a lot of energy; the high laser energy requires high cooling efficiency from the cooling components, further increasing the stress testing energy consumption.

[0028] Based on the above problems, this invention proposes a laser burning system.

[0029] Please see Figure 1 In one embodiment of the present invention, the laser 8 burn-in system includes a burn-in component 1, a beam-expanding module 2, a photoelectric conversion component, and an electrical energy processing module 4.

[0030] The copying component 1 is used to connect to the laser 8; the beam spreading module 2 is used to receive the laser beam from the laser 8 and output a uniformly diffused beam; the photoelectric conversion component is used to receive the uniformly diffused beam and output the electrical energy to be processed; the power processing module 4 is electrically connected to the photoelectric conversion component and is used to receive the electrical energy to be processed and output usable power.

[0031] This technical solution involves sequentially passing the light beam generated by the laser 8 during the burn-in process through the uniform beam expanding module 2 for homogenization and energy diffusion, forming a uniformly diffused beam usable by the photoelectric conversion component. The photoelectric conversion component then efficiently converts the light energy of this beam into electrical energy to be processed. Finally, the electrical energy to be processed by the power processing module 4 is converted into directly usable electrical energy. This design not only achieves effective recovery and reuse of light energy during the burn-in process of the laser 8, avoiding energy waste in traditional burn-in processes and reducing energy consumption and burn-in costs, but also ensures uniform energy distribution of the beam received by the photoelectric conversion component through the processing of the uniform beam expanding module 2, improving energy conversion efficiency and stability, and guaranteeing the reliability and economy of the entire system operation.

[0032] In specific implementation, the burn-in component 1 is used to connect to the laser 8 to fix the output direction of the laser 8, facilitating the beam homogenization and expansion module 2 to receive the laser. The connection method between the burn-in component 1 and the laser 8 is not limited. For example, the laser 8 body can be directly positioned, or the output end of the laser 8 can be connected via optical fiber. In the embodiment, the burn-in component 1 includes a connector 13 to connect to the optical cable head 6 of the output end of the laser 8, and the connector 13 is screwed to the optical cable head 6. The beam homogenization and expansion module 2 includes at least one of a beam homogenizer 21 and a beam expander 22. When both beam homogenizer 21 and beam expander 22 are included, they can be an integrated structure or a separate structure. The specific type of photoelectric conversion component is not limited, for example, it can include photovoltaic cells or solar thermal power generation devices. The power processing module 4 includes at least one of a voltage regulator 41, an inverter 42, and a grid-connected control cabinet 43.

[0033] Please see Figure 2 In one embodiment, the burner assembly 1 includes a beam splitter 11 and a light detection unit 12.

[0034] The beam splitter 11 is used to receive the laser beam 8 and split the laser beam 8 into a test beam and a recovery beam, the recovery beam being used to illuminate the uniform beam expanding module 2; the optical detection unit 12 is used to receive and test the test beam.

[0035] This technical solution uses a beam splitter 11 to split the laser beam of laser 8, allowing one portion of the beam to be used for real-time monitoring of laser 8's performance, while the other portion illuminates the uniform beam expanding module 2 for energy recovery. The optical detection unit 12 can test the split beam, providing crucial performance data feedback for the laser 8's stress test process, ensuring that energy recovery does not affect the monitoring of the laser 8's operating status.

[0036] In specific implementation, the beam splitter 11 may include a beam splitter or a fiber optic beam splitter. The splitting ratio of the beam splitter 11 is fixed, for example, it may be 1:99. Most of the light energy is used for energy recovery to improve energy recovery efficiency. The test parameters of the beam under test may include at least one of power, wavelength, and stability. The relevant parameters of the laser 8 are calculated based on the test results and the splitting ratio. The testing assembly 1 also includes an optical blocking component to isolate the influence of external light on the laser beam 8. The optical blocking component may include a housing, with the light-emitting end of the laser 8 connected to the housing. The beam splitter and the optical detection unit 12 are housed within the housing to isolate external light. When the beam splitter 11 includes a fiber optic beam splitter, an optical fiber is used to connect the laser 8, thereby blocking the influence of external light on the test results of the optical detection unit 12. The specific structure of the optical detection unit 12 is not limited; for example, it may include a power meter or a beam analyzer.

[0037] In another embodiment, the laser 8 stress test system includes a current tester and a controller. Either of the above two embodiments may be used, or both may be used simultaneously.

[0038] The current tester is used to test the operating current of the laser 8; the controller is used to electrically connect the current tester and calculate the power of the laser 8.

[0039] This technical solution uses a current meter to collect the operating current of laser 8 in real time. The controller then uses this current data, combined with the voltage parameters of laser 8 (usually known or measurable parameters), to calculate the real-time output power of laser 8. This design enables the system to accurately grasp the energy consumption and energy conversion input benchmark of laser 8 during the stress test process, providing data support for evaluating energy recovery efficiency and optimizing system operating parameters, thus closely linking the energy recovery process with the operating status of laser 8.

[0040] In specific implementation, the current tester may include an ammeter or be integrated into the control power supply 5. The controller may include an analog multiplier or a digital signal processor. In this embodiment, the current tester and the controller are integrated into the control power supply 5. The burn-in component 1 may include a mounting cabinet with connectors 13, and the control power supply 5 may be integrated into the burn-in component 1.

[0041] In one embodiment, the beam homogenizer 2 includes a beam homogenizer 21 and a beam expander 22.

[0042] Beam homogenizer 21 is used to receive the laser beam 8 and convert the laser beam 8 into a flat-top beam; beam expander 22 is used to receive the flat-top beam and diffuse the flat-top beam into a uniformly diffused beam.

[0043] This technical solution uses a beam homogenizer 21 to convert the originally concentrated Gaussian beam into a flat-top beam with uniform energy distribution, providing conditions for further beam diffusion. Subsequently, a beam expander 22 diffuses the flat-top beam, reducing the beam energy density while expanding the beam illumination area, making it more suitable for the light-receiving surface of the photoelectric conversion component, improving the efficiency and stability of energy conversion, and avoiding damage to the converter caused by excessive local energy.

[0044] In specific implementation, the beam homogenizer 21 includes a homogenizing mirror or a homogenizing plate, and the beam expander 22 includes a Galilean beam expander or a Keplerian beam expander.

[0045] In one embodiment, during the testing of the fiber laser 8, a uniform beam expander module 2 is first used to convert the energy-concentrated Gaussian beam generated by the laser 8 into a large, uniform beam with low energy per unit area. This large beam radiates onto a monochromatic photovoltaic cell array, which converts the light energy into electrical energy. Typically, the converted electricity is direct current (DC) and unstable. A voltage regulator 41 is then configured to stabilize the voltage at 220V / 380V. This voltage is then connected to an inverter 42 to convert the 220V / 380V DC to 220V / 380V AC. Finally, the power is connected to the industrial power grid via a grid-connected control cabinet 43, allowing for internal power supply and recycling within the enterprise.

[0046] This invention transforms the energy consumption process of the fiber laser 8 during testing and cooling into a process where the laser 8 generates electricity while testing, by setting up a uniform beam expansion module 2, a photoelectric conversion component, and an energy processing module 4. This enables the enterprise to achieve internal power circulation, save energy and reduce consumption, and promote the green and low-carbon development of the enterprise.

[0047] The beam homogenizer and beam expander module 2 consists of a beam homogenizer 21 and a beam expander 22. The beam homogenizer 21 homogenizes the energy-concentrated Gaussian beam emitted by the laser 8 into a flat-top beam with uniform energy distribution. The beam expander 22 diffuses the small spot of the flat-top beam into a large spot with relatively low energy per unit area.

[0048] Monochromatic photovoltaic cells are the core components for converting light energy into electrical energy. Through homogenization and diffusion, a large light spot achieves high-efficiency photoelectric conversion due to its uniform energy distribution and concentrated wavelength.

[0049] This embodiment provides an integrated photoelectric conversion continuous high-power fiber laser 8 burn-in system. This system fully demonstrates the conversion process of laser 8 burn-in electrical energy to optical energy to electrical energy, providing laser 8 manufacturers with a brand-new reusable and environmentally friendly energy recovery solution.

[0050] Taking a 20000W continuous fiber laser 8 as an example, the core diameter of the fiber optic cable for laser 8 is 100μm, and the wavelength is 1080nm. When laser 8 is powered on, it emits light. The laser beam emitted from the fiber optic cable head 6 of laser 8 is a concentrated Gaussian beam with a small spot size and an energy density of approximately 255MW / cm². 2 Connect the optical cable head 6 of laser 8 to the beam homogenizer and expander module 2. The beam first passes through beam homogenizer 21, which homogenizes the Gaussian beam into a flat-top beam with uniform intensity distribution. After passing through beam expander 22, the flat-top beam, with a diameter on the order of micrometers, is diffused into a large square spot with a side length of approximately 50 cm or a circular spot with a diameter of 50 cm. At this point, the energy density of the spot is approximately 8 W / cm². 2 -10W / cm 2 .

[0051] Although the energy density of the beam after homogenization and expansion is much lower than that emitted by laser 8, it is still too high for ordinary solar photovoltaic cells (solar radiation intensity is about 0.1W / cm²). 2 A monochromatic photovoltaic cell 3 (also known as a laser power converter) needs to be fabricated using gallium arsenide or by adjusting the composition of a gallium indium arsenide ternary compound. This type of monochromatic photovoltaic cell 3 can precisely match the bandgap energy to photons at 1080nm. Due to the uniform and stable distribution of the radiation spot intensity, the photoelectric conversion efficiency of the monochromatic photovoltaic cell 3 is approximately 60%-70%. The monochromatic photovoltaic cell 3 can be connected in series or parallel to form a battery pack, meeting the output voltage requirements of 220V / 380V. Since 30%-40% of the energy in the photovoltaic cell pack cannot be absorbed, heat will be generated. A cooling circulating water system can be used to cool the battery pack, keeping the temperature below 80℃. Since most of the energy has been absorbed by the photovoltaic cell pack at this point, the requirements for the water flow rate and water quality of the cooling circulating water system will be correspondingly reduced.

[0052] Monochromatic photovoltaic (PV) cell arrays output direct current (DC), and due to variations in the current-collecting capabilities of different PV cells, the output voltage stability is typically insufficient. A voltage regulator 41 is connected after the monochromatic PV cell array to stabilize the output voltage at 220V / 380V. This stabilized voltage is then connected to an inverter 42, which converts the 220V / 380V DC power into 220V / 380V AC power. Finally, the AC power is fed into the grid-connected control cabinet 43. This control cabinet is equipped with circuit breakers, anti-islanding protection devices, and a communication module, allowing for real-time monitoring of power generation. In case of an anomaly, it can activate anti-islanding protection to ensure grid connection safety and compliance.

[0053] Using the technical solution of this embodiment, the energy reuse rate is calculated as follows: If the laser spot after homogenization and beam expansion is a square with a side length of about 50cm, and the effective receiving area of ​​the battery pack is 1.5 times the area of ​​the spot, the energy loss in this process is calculated as 15%, and the photoelectric conversion efficiency is calculated as 60%. If a 20000W fiber laser is subjected to a 6-hour stress test, the conversion efficiency from electrical energy to light energy is about 35%, then the power consumption is 342.9 kWh, and the power generation is about 91.8 kWh, with an energy reuse rate of about 27%.

[0054] The grid-connected control cabinet 43 is a key power equipment used to safely and stably connect distributed generation systems (such as photovoltaic, wind power, energy storage, etc.) to the public power grid. Its core function is to realize the grid connection, monitoring, protection and intelligent control of power.

[0055] In one embodiment, the beam homogenizer and beam expander module 2 includes a protective housing 23 with an inner cavity 231. The beam homogenizer 21 and the beam expander 22 are disposed in the inner cavity 231. The protective housing 23 is provided with an entrance port 232 for the laser beam to enter and an exit port 233 for uniformly diffusing the beam output. An optical fiber connector 6 is provided at the exit end of the laser 8. The optical fiber connector 6 can be directly connected to the entrance port 232 or there can be a gap between it and the entrance port 232.

[0056] This technical solution integrates the beam homogenizer 21 and the beam expander 22 together through the inner cavity 231 of the protective housing 23, forming a compact and enclosed optical processing unit. This design not only helps to ensure the stability of the beam during transmission and conversion, and reduces the interference of the external environment (such as dust and airflow) on optical components and beam quality, but also provides a certain degree of protection for the internal optical components. At the same time, it facilitates the overall installation, debugging and maintenance of the module, and optimizes the structural layout of the system.

[0057] In the specific implementation process, there are no restrictions on the way the beam homogenizer 21 and the beam expander 22 are fixed to the protective housing 23. For example, they can be bolted, glued or snap-fitted.

[0058] In one embodiment, the laser 8 burn-in system includes a cooling assembly for cooling the photoelectric conversion assembly.

[0059] This technical solution utilizes a cooling system specifically designed for temperature control of the photoelectric conversion component. During operation, the photoelectric conversion component inevitably generates heat due to the absorption of laser energy and the photoelectric conversion process. Excessive temperature can negatively impact its conversion efficiency and lifespan. The cooling system effectively removes excess heat, ensuring the photoelectric conversion component operates within a suitable temperature range, thereby maintaining the system's efficient and stable operation.

[0060] In practice, there are no restrictions on the specific type of cooling components; for example, they can include liquid cooling or air cooling. The energy consumed by the cooling components is less than the electrical energy recovered by the system.

[0061] In one embodiment, the cooling assembly includes a coolant circulation pipe 7 connected to the photoelectric conversion assembly.

[0062] This technical solution directly connects to the photoelectric conversion component via a coolant circulation pipe 7, utilizing the circulating flow of coolant within the pipe to absorb and remove the heat generated by the photoelectric conversion component. This contact-type cooling method boasts high heat transfer efficiency and can quickly respond to temperature changes in the photoelectric conversion component. The coolant can be water, a specialized heat-conducting fluid, etc. External heat dissipation equipment (such as radiators or cooling towers) cools the coolant after it absorbs heat, and a power pump facilitates its circulation, ensuring the continuity and stability of the cooling effect.

[0063] In the specific implementation process, when the coolant circulation pipe 7 is connected to the photoelectric conversion component, it is necessary to avoid the beam receiving surface of the photoelectric conversion component to avoid affecting the uniform diffusion of the beam received by the photoelectric conversion component. For example, it can be set on the back surface and side of the photoelectric conversion component.

[0064] In one embodiment, the power processing module 4 includes: a voltage regulator 41, an inverter 42, and a grid-connected control cabinet 43.

[0065] A voltage regulator 41 is used to electrically connect the photoelectric conversion component; an inverter 42 is used to electrically connect the voltage regulator 41; and a grid-connected control cabinet 43 is used to electrically connect the inverter 42 to output usable electrical energy.

[0066] This technical solution uses a voltage regulator 41 to stabilize the electrical energy output from the photoelectric conversion component, ensuring stable voltage input to subsequent circuits and preventing damage to the equipment from voltage fluctuations. The inverter 42 converts the DC power output from the voltage regulator 41 into AC power to meet the needs of most electrical devices or grid connection. The grid connection control cabinet 43, as the control center for power output, can detect, protect, and control the AC power output from the inverter 42, ensuring it meets grid standards or the requirements of specific electrical devices, ultimately providing a safe and stable output of usable electrical energy.

[0067] In one embodiment, the laser 8 burn-in system includes a plurality of burn-in components 1, each burn-in component 1 being provided with a beam-scaling module 2, and the photoelectric conversion component being used to receive the uniformly diffused beam output by the plurality of beam-scaling modules 2 and output usable electrical energy.

[0068] This technical solution utilizes multiple testing components 1 operating in parallel. Each component is independently connected to a laser 8 and equipped with a corresponding uniform beam expanding module 2, enabling multiple lasers 8 to simultaneously perform testing and energy recovery. These uniformly diffused beams, after uniform beam expanding, illuminate the same photoelectric conversion component and share the power processing module 4. This simplifies the system structure, significantly increases the total optical energy input to the converter, thereby enhancing the overall power output of the system and improving its processing efficiency and flexibility.

[0069] In another embodiment, the laser beams generated by multiple lasers 8 can be combined and then irradiated onto the same uniform beam expanding module 2 for processing.

[0070] In one embodiment, the photoelectric conversion component includes a monochromatic photovoltaic cell 3, which comprises gallium arsenide material or gallium indium arsenide ternary compound material.

[0071] This technical solution uses a monochromatic photovoltaic cell 3 as the core component of the photoelectric conversion module to convert energy from laser light emitted by a laser 8 at a specific wavelength. Gallium arsenide and gallium indium arsenide ternary compound materials have excellent photoelectric conversion performance, especially in the specific monochromatic light wavelength range, enabling high conversion efficiency. Selecting these materials to fabricate the photovoltaic cell can fully match the output wavelength characteristics of the laser 8, maximizing the conversion of laser energy into electrical energy and improving the efficiency of the entire energy recovery system.

[0072] In one embodiment, the medium- and low-power continuous fiber lasers 8 are characterized by multiple units operating simultaneously, with individual units having output power ranging from 3000W, 6000W, and 12000W. For these numerous fiber lasers 8 with relatively low power, to ensure economic efficiency, the emitted light energy is first collected and then concentrated to convert the light energy into electrical energy through a monochromatic photovoltaic cell array.

[0073] Please see Figure 3 This diagram illustrates a low-power fiber laser 8 testing system for integrated photoelectric conversion. Multiple fiber lasers 8 are simultaneously powered on and emit light. The laser beam emitted from the fiber optic cable head 6 of each fiber laser 8 is a concentrated Gaussian beam with a small spot size. Each laser 8 has a separate beam homogenizer and expander module 2 at the rear end of its fiber optic cable head 6, operating on the same principle as the high-power fiber laser 8 testing system. After passing through the beam homogenizer 21 and beam expander 22, the Gaussian beam from each laser 8 forms a spot of a specific shape, which can simultaneously irradiate a monochromatic photovoltaic cell array. The subsequent conversion into electrical energy and its integration into the industrial power grid is consistent with the process for the high-power fiber laser 8.

[0074] Using the technical solution of this embodiment, the energy reuse rate is calculated as follows: If the laser 8 in the burn-in machine is a C3000S, the laser spot after homogenization and beam expansion is a square with a side length of approximately 30cm. The effective receiving area of ​​the battery pack is 1.2 times the area of ​​the laser spot. Assuming an energy loss of 15% and a photoelectric conversion efficiency of 60%, the energy density irradiated onto the battery pack is approximately 3W / cm². 2 A 3000W fiber laser with 8 units underwent a 6-hour stress test. The conversion efficiency from electrical energy to optical energy was approximately 35%, resulting in a power consumption of 51.4 kWh. Each unit can generate approximately 11 kWh of electricity, and the energy reuse rate is approximately 21%.

[0075] Because the laser beams emitted by multiple low- and medium-power fiber lasers 8 are simultaneously irradiated onto the monochromatic photovoltaic cell array after being homogenized and expanded, the superposition effect will increase the photoelectric conversion efficiency, and the energy reuse rate will increase to a certain extent according to the superposition effect. However, excessive irradiation intensity may reduce the conversion efficiency of the monochromatic photovoltaic cell 3, necessitating control of the number of low- and medium-power fiber lasers 8 simultaneously operating based on the characteristics of the monochromatic photovoltaic cell 3. As the number of low- and medium-power fiber lasers 8 simultaneously operating increases, the cooling intensity of the monochromatic photovoltaic cell array needs to be increased to ensure that the water flow rate meets requirements; if necessary, an air cooling system can be added in addition to the water cooling system.

[0076] In this embodiment, the fiber laser 8 has a wavelength of 1080nm. Since the bandgap of ordinary solar cells cannot be precisely matched to this wavelength, a monochromatic photovoltaic cell 3 made of gallium arsenide-based materials is required. This photovoltaic cell precisely matches the bandgap energy to the 1080nm photon wavelength by adjusting the ratio of arsenic, indium, and gallium. The monochromatic photovoltaic cell 3 utilizes semiconductor processing technology to sequentially grow a P-type layer, an intrinsic layer, and an N-type layer on a substrate. When a 1080nm photon irradiates the surface of the photovoltaic cell, photons with energy greater than or equal to the material's bandgap are absorbed, exciting a valence band electron to the conduction band, forming an electron-hole pair. Driven by a built-in electric field, the electron diffuses into the N-type layer, and the hole diffuses into the P-type layer. An external circuit connects the P-type and N-type layers. Under the influence of the potential difference, electrons flow from the N-type layer to the P-type layer through the external circuit, forming a current and completing the conversion of light energy into electrical energy. The higher the light energy density irradiated onto the photovoltaic cell, the larger the generated current, and the higher the efficiency of light energy conversion into electrical energy. Because the laser energy processed by the uniform beam expanding module 2 is uniform and has a high density, the photoelectric conversion efficiency of the monochromatic photovoltaic cell 3 can reach 60%-70%.

[0077] When multiple photovoltaic cells are connected in series, the voltage is the sum of the voltages of each individual photovoltaic cell, and the current is the current generated by the smallest photovoltaic cell. To ensure that the output current and voltage meet the requirements of subsequent use, photovoltaic cells can be connected in series and parallel to form a battery pack.

[0078] The current collected by the photovoltaic cell array is direct current, and due to the influence of the photovoltaic cell conversion efficiency, the voltage stability is usually insufficient. It is necessary to first configure a voltage regulator 41 to stabilize the output voltage within the required range, and then configure an industrial inverter 42 to convert the direct current into alternating current.

[0079] Alternating current is connected to the industrial power grid after passing through grid connection control cabinet 43. The control cabinet is equipped with circuit breakers, anti-islanding protection devices and communication modules, which can monitor the power generation status at any time. In case of abnormality, it can generate an anti-islanding effect to ensure grid connection safety and compliance.

[0080] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A laser burn-in system, characterized in that, include: Burn-in kit, used to connect to the laser; The beam-splitting module is used to receive the laser beam and output a uniformly diffused beam. Photoelectric conversion component, used to receive a uniformly diffused light beam and output electrical energy to be processed; and, The power processing module is electrically connected to the photoelectric conversion component and is used to receive power to be processed and output usable power.

2. The laser burning system as described in claim 1, characterized in that, The burn-in component includes: A beam splitter receives the laser beam and splits it into a test beam and a recovery beam, the recovery beam being used to illuminate the homogenizing and beam-expanding module; and... The optical detection unit is used to receive and test the light beam under test.

3. The laser burn-in system as described in claim 1, characterized in that, The laser burning system includes: A current tester is used to test the operating current of a laser; and, A controller is used to electrically connect the current tester and calculate the power of the laser.

4. The laser burning system as described in claim 1, characterized in that, The beam-uniforming and beam-expanding module includes: A beam homogenizer for receiving a laser beam and converting it into a flat-top beam; and, A beam expander is used to receive a flat-top beam and diffuse it into a uniformly diffused beam.

5. The laser burn-in system as described in claim 4, characterized in that, The beam homogenizer and beam expander module includes a protective housing with an inner cavity. The beam homogenizer and the beam expander are disposed in the inner cavity. The protective housing is provided with an entrance for the laser beam to enter and an exit for uniformly diffusing the beam output.

6. The laser burning system as described in claim 1, characterized in that, The laser burn-in system includes a cooling component for cooling the photoelectric conversion component.

7. The laser burning system as described in claim 6, characterized in that, The cooling assembly includes a coolant circulation pipe connected to the photoelectric conversion assembly.

8. The laser burn-in system as described in claim 1, characterized in that, The power processing module includes: A voltage regulator is used for electrical connection to the photoelectric conversion component; An inverter for electrically connecting the voltage regulator; and, A grid-connected control cabinet is used to electrically connect the inverter to output usable electrical energy.

9. The laser burn-in system as described in claim 1, characterized in that, The laser burn-in system includes multiple burn-in components, each of which is equipped with a beam-scaling module. The photoelectric conversion component is used to receive the uniformly diffused beams output by the multiple beam-scaling modules and output usable electrical energy.

10. The laser burning system as described in claim 1, characterized in that, The photoelectric conversion component includes a monochromatic photovoltaic cell, which comprises gallium arsenide material or gallium indium arsenide ternary compound material.

Images