Pump laser aging test system and electronic equipment

Abstract

The embodiment of the invention discloses a pump laser aging test system and electronic equipment. The aging test system comprises a light path monitoring system, a liquid cooling heat dissipation system, an electrical control system, a test system and a cabinet body, the optical path monitoring system is used for monitoring a monitoring index of the pump laser in real time to obtain monitoring index data; the test system is used for monitoring the monitoring index data and controlling the electrical control system according to a monitoring result; the electrical control system supplies power to the pump laser through the constant-current and constant-voltage direct-current power supply and performs on-off control on the constant-current and constant-voltage direct-current power supply according to a control instruction sent by the upper computer; and the liquid cooling heat dissipation system is used for performing temperature control on the aging process of the pump laser. The optical path monitoring system monitors multi-dimensional monitoring indexes such as the optical power and the spectrum of the pump laser in real time, it is guaranteed that the aging state of the pump laser is accurately evaluated, various parameters such as the temperature, the current and the voltage of a pump cover plate are covered, and different test requirements can be met.

Description

Technical Field

[0001] This disclosure relates to the field of aging test technology, specifically to a pump laser aging test system and electronic equipment. Background Technology

[0002] In the production and R&D of high-power pump lasers, their aging reliability directly affects the overall performance and lifespan of the laser. Traditional aging equipment has many shortcomings: low testing efficiency, difficulty in achieving multi-station parallel aging testing, long aging test cycles when facing large-scale production needs, severely restricting production efficiency, and limited monitoring parameters, only able to monitor a few basic parameters, making it difficult to accurately assess the performance changes and potential problems of the pump source. Summary of the Invention

[0003] This disclosure provides a pump laser aging test system and electronic device, which aims to at least partially solve one of the technical problems in the related art.

[0004] In a first aspect, embodiments of this disclosure provide a pump laser aging test system, comprising: an optical path monitoring system, a liquid cooling system, an electrical control system, a test system, and a cabinet, wherein...

[0005] At least one pump laser to be tested for aging is installed in the cabinet.

[0006] The optical path monitoring system is used to monitor at least one monitoring indicator of the pump laser in real time and obtain monitoring indicator data.

[0007] The testing system is used to monitor the monitoring index data and control the electrical control system based on the monitoring results and preset monitoring index thresholds.

[0008] The electrical control system supplies power to the pump laser via a constant current and constant voltage DC power supply, and controls the switching of the constant current and constant voltage DC power supply according to control commands sent by the host computer.

[0009] The liquid cooling system is used to control the temperature during the aging process of the pump laser.

[0010] Optionally, the cabinet includes multiple product aging layers and an electrical control layer.

[0011] The pump laser is installed in the product aging layer, and each product aging layer includes one or more of the following devices: at least one fiber optic bracket, at least one silicon photodiode probe, at least one laser absorber, at least one high-reflection low-reflection lens, and at least one temperature detector.

[0012] The control layer of the electrical cabinet is equipped with an optical power control card, a temperature acquisition card, an optical switch, and a spectrometer. The control layer of the electrical cabinet is connected to the testing system.

[0013] The temperature acquisition card is connected to the temperature detector of the product aging layer, and the optical power control card is connected to the silicon photodiode probe of the product aging layer.

[0014] Optionally, the liquid cooling system includes a fiber laser water chiller, an external liquid chiller, and a liquid cooling panel.

[0015] Each of the product aging layers is equipped with a fiber laser water chiller, and the cabinet is connected to the external liquid chiller.

[0016] The cabinet uses the liquid cooling panel to cool the pump laser and the silicon photodiode probe, as well as to provide liquid cooling for the laser absorption tube.

[0017] Optionally, the monitoring indicators include one or more of the following: pump cover temperature, optical power, current, voltage, spectrum, base plate temperature, and nozzle temperature.

[0018] The monitoring system is used to monitor whether the monitoring indicator exceeds the preset monitoring indicator threshold, and when the monitoring indicator exceeds the preset monitoring indicator threshold, it sends a power-off control command to the electrical control system.

[0019] Optionally, the optical path monitoring system is used for:

[0020] The beam emitted by the pump laser is processed by a high-reflection low-light lens, and the energy absorption tank and the pump laser are cooled by the liquid cooling system.

[0021] The reflected energy is absorbed by the energy absorption barrel, and the transmitted energy enters the silicon photodiode probe and the fiber optic probe. The fiber optic probe, the optical switch, and the spectrometer are connected in sequence. The optical switch achieves optical path switching by switching the optical path, and the spectrometer is used to acquire spectral monitoring indicators.

[0022] Optionally, the cabinet includes multiple product aging layers, each of which includes N fiber optic probes, N silicon photodiode probes, N pump lasers, and N high-reflection, low-transmission lenses with 99.5% reflection and 0.5% transmission, where N is greater than 1.

[0023] In this configuration, every two adjacent product aging layers have an optical fiber probe fixed next to the vertical structure used to fix the silicon photodiode probe to receive transmitted light.

[0024] The output terminal of the optical switch is connected to the input terminal of the attenuator, and the output terminal of the attenuator is connected to the spectrometer via an optical fiber.

[0025] Optionally, the optical path monitoring system is used for:

[0026] Based on the pump coupler, the beam of the pump laser is mechanically processed so that the energy absorption barrel receives the first input beam of the pump laser and the second input beam of the pump laser is received through the fiber coupler, wherein the energy of the first input beam is higher than the energy of the second input beam;

[0027] The liquid cooling system is used to dissipate heat from the energy absorption tank and the pump laser.

[0028] The second input beam is processed by the fiber optic coupler so that the third input beam sequentially enters the optical switch and the spectrometer. The optical switch is used to switch the optical path, and the spectrometer is used to acquire spectral monitoring indicators. The energy of the third input beam is lower than that of the second input beam.

[0029] Optionally, the proportions of the first input beam and the second input beam are 99.99% and 0.01%, respectively, and the splitting ratio of the fiber coupler is 1:1.

[0030] The fiber coupler inputs a fourth input beam into the pigtail, and the fourth input beam and the third input beam are 50% of the second input beam.

[0031] Optionally, the system may also include a protection system, which includes at least: a photodetector located in the optical path, a thermistor distributed in key parts of the equipment, a leakage protection switch, an overcurrent protection device, a water leakage protection sensor, and an emergency stop button.

[0032] Secondly, embodiments of this disclosure also provide an electronic device, which includes the pump laser aging test system described in the first aspect.

[0033] In summary, the optical path monitoring system can monitor the pump laser's optical power, spectrum, and other multi-dimensional indicators in real time through various methods. Combined with the testing system, it accurately judges based on preset thresholds, ensuring precise assessment of the pump laser's aging status. It covers multiple parameters such as pump cover temperature, current, and voltage, providing a comprehensive understanding of the equipment's aging condition. The cabinet's layered design, with each layer equipped with targeted devices (fiber optic mounting brackets, silicon photodiode probes, etc.), adapts to different testing needs. The coordinated operation of multiple links from the optical path to the circuitry improves testing accuracy. The liquid cooling system, through fiber laser water chillers, external liquid chillers, and liquid-cooled panels, precisely controls the temperature of the pump laser and related components (such as the laser absorber), preventing temperature fluctuations from affecting aging test results and ensuring stable system operation. The electrical control system uses a constant current and constant voltage DC power supply, combined with upper computer command switching control, to stably power the pump laser and reduce interference from power supply fluctuations in the aging test. The cabinet can be equipped with multiple product aging layers, supporting simultaneous testing of multiple pump lasers. Each aging layer device is flexibly configurable to adapt to aging tests of pump lasers with different specifications and testing requirements, resulting in strong system scalability. After receiving optical path monitoring data, the testing system quickly controls the electrical control system based on the results. The cabinet control layer centrally collects and interacts with data through optical power control cards and temperature acquisition cards, improving data processing and command execution efficiency and ensuring a smooth and efficient aging test process.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the pump laser aging test system provided in the embodiments of this disclosure;

[0037] Figure 2 This is a schematic diagram of the structure of a pump source beam monitoring and beam splitting system provided in an embodiment of this disclosure;

[0038] Figure 3 This is a schematic diagram of the pump source optical path system in an all-fiber optic scheme;

[0039] Figure 4 It is a flowchart illustrating the structure of a single-layer data flow in a system under an all-fiber optic technology solution;

[0040] Figure 5This is a schematic diagram of the cabinet structure used for equipment aging tests. Detailed Implementation

[0041] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0042] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0043] Figure 1 This is a schematic diagram of the structure of a pump laser aging test system provided according to an embodiment of the present disclosure.

[0044] like Figure 1 As shown, the pump laser aging test system includes:

[0045] The system includes an optical path monitoring system, a liquid cooling system, an electrical control system, a testing system, and a cabinet.

[0046] At least one pump laser to be tested for aging is installed in the cabinet;

[0047] The optical path monitoring system is used to monitor at least one monitoring indicator of the pump laser in real time and obtain monitoring indicator data.

[0048] The testing system is used to monitor the monitoring index data and control the electrical control system based on the monitoring results and preset monitoring index thresholds;

[0049] The electrical control system supplies power to the pump laser via a constant current and constant voltage DC power supply, and controls the switching of the constant current and constant voltage DC power supply according to the control commands sent by the host computer.

[0050] Liquid cooling systems are used to control the temperature during the aging process of pump lasers.

[0051] The pump laser aging test system consists of core components such as an optical path monitoring system, a liquid cooling system, an electrical control system, a testing system, and a cabinet. These components work together to achieve comprehensive monitoring, precise control, and effective protection of the pump laser during the aging process, providing a reliable basis for evaluating the performance and lifespan of the laser.

[0052] The cabinet serves as the system's installation and support structure, housing at least one pump laser to be tested for aging, meeting the needs of multi-station parallel testing. It typically includes multiple product aging layers and an electrical control cabinet layer. The product aging layers house the pump lasers, and their number can be configured according to actual needs. Each layer can accommodate a certain number of pump lasers, supporting aging of different power models; for example, a single layer can age up to eight pump products, enabling simultaneous testing of multiple lasers and significantly improving testing efficiency. Simultaneously, each layer is equipped with multiple temperature detectors covering key points such as the pump base plate, housing, nozzles, and water-cooling plates, monitoring temperature changes in real time and providing comprehensive temperature protection for the safe operation of the equipment.

[0053] The control layer of the electrical cabinet is used to house control and detection equipment such as optical power control cards, temperature acquisition cards, optical switches, and spectrometers, which are connected to the testing system to achieve centralized control and data processing of the entire testing process.

[0054] The optical path monitoring system is a crucial component for monitoring the performance parameters of the pump laser. Its core function is to monitor at least one key performance indicator of the pump laser in real time and obtain the monitoring data. These indicators typically include pump cover temperature, optical power, current, voltage, spectrum, substrate temperature, and nozzle temperature. To adapt to different testing needs and improve the accuracy and stability of testing, the optical path monitoring system offers both spatial light and all-fiber optic solutions.

[0055] In the spatial light scheme, each aging layer includes multiple fiber optic brackets, a 99.5% reflective and 0.5% transmittant mirror (including the frame), a PD probe (to receive transmitted light and calculate the relative optical power of the pump output), and an absorber (to receive reflected light and is liquid-cooled). Every two adjacent aging layers have fiber optic heads fixed next to the vertical structure that holds the PD to receive transmitted light. The fiber optics connect to an optical switch module, the output of which is connected to the input of an attenuator. The output of the attenuator is then connected via fiber optics to a portable spectrometer (to acquire the center wavelength and half-width and height of the pump output). Through this structure, the reflected energy is absorbed by the absorber, and the transmitted energy enters the PD probe and the fiber optic probe, thereby enabling the monitoring of parameters such as optical power and spectrum.

[0056] The all-fiber solution replaces spatial light reflection components with an all-fiber structure. Each aging layer includes a high-power coupler, a communication fiber optic coupler, a PD probe, and an absorption tube, etc., and optical path switching and spectral acquisition are achieved through optical switches and spectrometers. This solution avoids high-power deformation of reflection components and spatial light reflection interference, making the aging process safer and more stable.

[0057] The testing system is used to monitor the monitoring index data acquired by the optical path monitoring system in real time, and to control the electrical control system based on the monitoring results and preset monitoring index thresholds.

[0058] The testing system is connected to devices such as the optical power control card, temperature acquisition card, optical switch, and spectrometer in the electrical control cabinet, receiving real-time data from various monitoring indicators. When a certain indicator exceeds a preset threshold, the testing system immediately sends a control command to the electrical control system, requiring it to take appropriate protective measures, such as shutting down the constant current and constant voltage DC power supply, to prevent damage to the pump laser due to abnormal parameters. Simultaneously, the testing system is also responsible for recording, analyzing, and storing the test data, providing data support for subsequent product evaluation and process optimization.

[0059] The electrical control system provides a stable power supply to the pump laser and controls the power supply switching according to control commands sent from the host computer. Each product aging layer typically has an independent constant current / constant voltage DC power supply (e.g., a 10kW power supply), connected in series with the pump laser to provide stable voltage and current. The power supply also includes multiple thermistors to monitor parameters such as the temperature of the pump surface and bottom. The optical power control card in the electrical cabinet control layer connects to the PD probe, and the temperature acquisition card connects to the thermistors. These control cards are connected to a PC industrial control computer, enabling data monitoring and management through host software. When the test system issues a power-off command or the host software detects parameters exceeding limits, the electrical control system can respond quickly, shutting down the DC power supply to protect the pump laser from power loss.

[0060] The liquid cooling system effectively controls the temperature during the aging process of the pump laser, ensuring the equipment operates in a suitable temperature environment. This system typically includes a fiber laser water chiller, an external liquid chiller, and a liquid cooling panel. Each product aging layer is equipped with a liquid chiller of a certain power (e.g., 15000W). The cabinet's open interface connects to the external liquid chiller, and the liquid cooling panel cools the pump and PD probe during aging, while simultaneously cooling the absorption tube. This effectively dissipates heat generated by the pump itself and energy absorption, ensuring that the laser does not overheat during aging testing, thus preventing damage to the equipment or affecting test results.

[0061] Optionally, the cabinet includes multiple product aging layers and an electrical control layer.

[0062] The pump laser is installed in the product aging layer, and each product aging layer includes one or more of the following devices: at least one fiber optic bracket, at least one silicon photodiode probe, at least one laser absorber, at least one high-reflection low-reflection lens, and at least one temperature detector.

[0063] The control layer of the electrical cabinet is equipped with an optical power control card, a temperature acquisition card, an optical switch, and a spectrometer. The control layer of the electrical cabinet is connected to the testing system.

[0064] The temperature acquisition card is connected to the temperature detector of the product aging layer, and the optical power control card is connected to the silicon photodiode probe of the product aging layer.

[0065] Understandably, the product aging layer is the core testing area, and the core installation object is the pump laser (the core equipment for aging testing). Supporting devices can be configured in one or more ways depending on testing requirements, such as: fiber optic brackets to fix the fiber optic cable and ensure optical path stability; silicon photodiode probes to detect optical parameters such as optical power; laser absorbers to absorb excess laser energy and avoid optical interference; high-reflection low-profile lenses to reflect / transmit the laser beam (used for optical path distribution); and temperature detectors to monitor the temperature within the aging layer in real time (e.g., laser and ambient temperatures).

[0066] The electrical cabinet control layer serves as the control and data interaction center, including an optical power control card, a temperature acquisition card, an optical switch, and a spectrometer. The control layer connects to the external testing system to receive test commands and upload data; the temperature acquisition card acts as a temperature detector on the product aging layer (acquiring temperature data); and the optical power control card controls and acquires optical power data from the silicon photodiode probe on the product aging layer.

[0067] Optional, the liquid cooling system includes a fiber laser water chiller, an external liquid chiller, and a liquid-cooled panel.

[0068] Each product aging layer is equipped with one fiber laser water chiller, and the cabinet is connected to an external liquid chiller.

[0069] The cabinet uses a liquid-cooled panel to cool the pump laser and silicon photodiode probe, as well as to cool the laser absorption tube.

[0070] It should be noted that the liquid cooling system achieves precise temperature control through a multi-stage cooling device. Its structure and functions are as follows: Core components: fiber laser water chiller, external liquid chiller, liquid cooling panel. Layered independent cooling: Each product aging layer corresponds to one fiber laser water chiller, specifically cooling the equipment in that layer; Overall heat dissipation: The cabinet is connected to the external liquid chiller, dissipating heat from critical equipment through the liquid cooling panel; Direct cooling: Pump laser, silicon photodiode probe (core heat-generating / precision equipment); Auxiliary heat dissipation: Laser light absorber (easily heats up after absorbing laser light, requiring liquid cooling).

[0071] Optional monitoring indicators include one or more of the following: pump cover temperature, optical power, current, voltage, spectrum, base plate temperature, and nozzle temperature.

[0072] The monitoring system is used to monitor whether the monitoring indicators exceed the preset monitoring indicator thresholds, and when the monitoring indicators exceed the preset monitoring indicator thresholds, it sends a power-off control command to the electrical control system.

[0073] Specifically, safety thresholds for each indicator can be preset (such as upper temperature limit and light power range). If an indicator exceeds the threshold, a power-off control command is immediately sent to the electrical control system (to avoid equipment damage or safety risks).

[0074] Optionally, the optical path monitoring system is used for:

[0075] The beam emitted by the pump laser is processed using a high-reflection low-profile lens, and a liquid cooling system is used to dissipate heat from the energy absorption tank and the pump laser.

[0076] The reflected energy is absorbed by the energy absorption barrel, and the transmitted energy enters the silicon photodiode probe and the fiber optic probe. The fiber optic probe, optical switch, and spectrometer are connected in sequence. The optical switch achieves optical path switching by switching the optical path, and the spectrometer is used to acquire spectral monitoring indicators.

[0077] It should be noted that the beam emitted by the pump laser is processed by a high-reflection low-reflection lens (reflecting part of the energy and transmitting part of the energy); the reflected energy is absorbed by the laser absorber (in conjunction with liquid cooling to prevent overheating); the transmitted energy is divided into two paths: one path enters the silicon photodiode probe (to monitor optical power); the other path enters the fiber optic probe, and after the optical path is switched by an optical switch, the spectrometer acquires the spectral data.

[0078] As one possible implementation, each aging layer includes 8 fiber optic brackets, 8 99.5% reflectance and 0.5% transmission mirrors (including brackets), 8 PD probes (to receive transmitted light and calculate the relative optical power of the pump output), and 8 absorbers (to receive reflected light and are liquid-cooled). Every two adjacent aging layers have fiber optic heads fixed next to the vertical structure where the PD is fixed to receive transmitted light. A total of 16 fibers connect to a 1×16 optical switch module. The output of the optical switch module is connected to the input of an attenuator (0-100% adjustable). The output of the attenuator is connected to a portable spectrometer (to acquire the center wavelength and half-width and height of the pump output) via fiber optic cable. Taking a bare fiber output, a wavelength of 976nm, and a fiber NA of 0.15 as an example, the distance from the pump fiber output end face to the reflector is adjusted to 30mm, the distance from the reflector to the PD is 60mm, and the distance from the reflector to the absorber is 50mm. At this point, the diameter of the light spot hitting the reflector is approximately 7.6 mm (10.7 mm on the inclined plane), the diameter of the light spot at the PD position is 25.7 mm, and the diameter of the light spot at the absorber is 24 mm. The photosensitive surface of the PD head is 1.2 mm × 1.2 mm, with a saturation power of 15 mW. Through geometric energy calculation, when the PD probe is located at the center of the light spot, the energy that can be received within the 1.2 mm photosensitive surface is 0.43%. Taking an incident power of 800 W as an example, the PD received power is approximately 800 W × 0.5% × 0.43% = 17 mW. Therefore, it is essential to ensure that the distance between the reflector and the PD probe is greater than 60 mm to avoid PD saturation.

[0079] Figure 2 This is a pump source beam monitoring and splitting system. Each pump source (path 1...path N) emits a beam, which is directed towards a high-power reflector (2). The high-power reflector (2) splits the beam into two parts: most of the energy is reflected to the energy absorption tank (3), and a small portion is transmitted for monitoring. The energy absorption tank (3) absorbs the main energy, and a liquid cooling device (8) dissipates heat for it and the pump sources. The transmitted small amount of beam is measured for power by a PD probe (4), or coupled into an optical fiber by an optical fiber probe (5), and then the optical path is switched by an optical switch (6), and finally the spectrum is analyzed by a spectrometer (7).

[0080] Figure 2This embodies the optical path system scheme for aging testing of high-power pump lasers. The core is to achieve safe control and accurate parameter detection of the pump source aging process through "splitting, sampling, monitoring, and heat dissipation". For single / multi-channel pump lasers, parameters such as spectrum and optical power are monitored during aging testing. At the same time, the safe operation of the equipment is ensured through heat dissipation and energy absorption (to avoid damage to the system by high-power beams). When the pump source emits light, the first splitting is done by a high-power reflector (2) which divides the beam into two parts: 99.5% energy → energy absorption barrel (3): safely absorbs the main energy and avoids light leakage; 0.5% energy → transmission is used for monitoring: enters the PD probe (4) and fiber optic probe (5) to achieve dual parameter detection of optical power and spectrum. PD probe (4): measures optical power (converts optical signal into electrical signal to determine whether the power is stable); fiber optic probe (5) + optical switch (6) + spectrometer (7): measures spectrum (the optical switch switches the optical path, and the spectrometer analyzes the wavelength and spectral distribution to determine the spectral stability of the pump source). The liquid cooling device (8) dissipates heat from the energy absorption tank (3) and the pump source (1) (because high-power beams generate heat, cooling is necessary to prevent equipment damage). Taking M-BK7 material as an example, with a thickness of 6.33mm and a reflective film of OD7 (high reflectivity, ensuring 99.5% energy reflection), the spot size and PD probe installation distance were also calculated (e.g., when the spot diameter is 25.7mm, the PD probe needs to be >60mm away from the reflector to avoid power overload). The PD probe receiving power was calculated (e.g., for an 800W pump source, the PD receiving power is ≈17mW), and the feasibility of the scheme was verified.

[0081] Optionally, the cabinet includes multiple product aging layers. Each product aging layer includes N fiber optic probes, N silicon photodiode probes, N pump lasers, and N high-reflection low-transmission lenses with 99.5% reflection and 0.5% transmission, where N is greater than 1. Fiber optic probes are fixed next to a vertical structure used to fix the silicon photodiode probes to receive transmitted light between every two adjacent product aging layers. The output of the optical switch is connected to the input of an attenuator, and the output of the attenuator is connected to the spectrometer via fiber optic cable.

[0082] As a possible example, in practical applications, the cabinet adopts a vertical cabinet design with a total of 5 layers. Four layers are product aging layers, and one layer is the electrical control layer. The product aging layer measures approximately 1600×600×1030 mm, and the electrical control layer measures approximately 1600×600×570 mm. The product aging layer can support pump aging of different power models, with 8 pump products aged per layer, totaling 32 pump sources across the 4 layers, with pump power ranging from 8W to 800W. Each layer is equipped with multiple temperature sensors covering key points such as the pump base plate, housing, nozzles, and water-cooling plate, monitoring temperature changes in real time.

[0083] Each aging layer is equipped with a 10kW constant current and constant voltage DC power supply (supply voltage 0-200V, current 0-50A, with communication capability with upper-level software), and 16 thermistors are installed to monitor the pump surface, bottom temperature, and nozzle temperature. The control cabinet houses four 8-port optical power control cards (connected to PD probes), eight 8-port temperature acquisition cards (connected to thermistors), one 1×8 optical switch, and one portable spectrometer. All control cards, optical switches, and spectrometers are connected to a PC industrial control computer. The upper-level software polls the optical switch ports in real time, collecting PD data, temperature data, and spectral data. When the monitored parameters exceed the threshold, it automatically communicates with the DC power supply and shuts off the power switch to achieve power-off protection.

[0084] Optionally, the optical path monitoring system is used for:

[0085] Based on the pump coupler, the beam of the pump laser is mechanically processed so that the energy absorption barrel receives the first input beam of the pump laser and the second input beam of the pump laser is received through the fiber coupler, wherein the energy of the first input beam is higher than the energy of the second input beam.

[0086] A liquid cooling system is used to dissipate heat from the energy absorption tank and the pump laser.

[0087] The second input beam is processed by an optical fiber coupler so that the third input beam enters the optical switch and the spectrometer in sequence. The optical switch is used to switch the optical path, and the spectrometer is used to obtain spectral monitoring indicators. The energy of the third input beam is lower than that of the second input beam.

[0088] Optionally, the proportions of the first input beam and the second input beam are 99.99% and 0.01%, respectively, and the splitting ratio of the fiber coupler is 1:1.

[0089] The fiber optic coupler inputs the fourth input beam into the pigtail, and the fourth and third input beams are 50% of the second input beam.

[0090] Figure 3It is a pump source optical path system with an all-fiber scheme. The core is to use fiber optic couplers to split the light to achieve high-power safe processing and accurate monitoring. The pump source emits an 800W beam as the system energy input. First split: The high-power pump coupler (2) splits the beam into two parts: 99.99% energy → energy absorption barrel (3): safely absorbs the main energy and avoids light leakage; 0.01% energy (80mW) → enters the fiber coupler (5) for monitoring. Second split: The fiber coupler (5) splits the light at a 1:1 ratio. The 80mW beam is split into two paths. One path is 40mW → with pigtail PD (6): to measure optical power (the optical signal is converted into an electrical signal to determine whether the power is stable, and the output power is <1mW); the other path is → optical switch (7) + spectrometer (8): to measure the spectrum (the optical switch switches the optical path, and the spectrometer analyzes the wavelength and spectral distribution to determine the spectral stability of the pump source). The liquid cooling device (4) dissipates heat from the pump source (1) and the energy absorption tank (3) (due to the heat generated by the high-power beam, cooling is required to maintain stability). Taking an 800W pump source as an example, after passing through a high-power pump coupler, 99.99% of the light enters the energy absorption tank (liquid cooling), and 0.01% of the light passes through an optical fiber coupler (1:1 beam splitting). One path goes to the pigtail PD6 to monitor the pump light, and the other path is switched by the optical switch 7 and then monitored by the spectrometer 8 (center wavelength, 3dB bandwidth). Compared with the spatial optical path, the all-fiber connection is safer; the fiber is stable, which facilitates calibration, reverse calibration and real-time power monitoring; it avoids fluctuations in monitoring values ​​caused by deformation of reflective components and spatial light reflection interference; the layout is simple and reduces the design of structural components.

[0091] It should be noted that the spatial light solution ensures optical path stability and accurate energy reception by precisely calculating the beam diameter and the positions of the reflector, PD probe, and absorber (e.g., the distance from the pump fiber output end face to the reflector is 30mm, the distance from the reflector to the PD is 60mm, and the distance from the reflector to the absorber is 50mm). The all-fiber solution avoids interference from reflective components, reduces the complexity of structural design, and further improves aging stability.

[0092] Optionally, the system may also include a protection system, which may include at least: a photodetector located in the optical path, a thermistor distributed in key parts of the equipment, a leakage protection switch, an overcurrent protection device, a water leakage protection sensor, and an emergency stop button.

[0093] Thermistors are distributed in key parts of the equipment to monitor temperature changes in real time. High-precision photodetectors are installed in the optical path to monitor its status in real time. The electrical components employ leakage current protection switches and overcurrent protection devices to ensure electrical safety. Simultaneously, a water leakage protection sensor detects water leakage in the water-cooling system and triggers the protection mechanism. An emergency stop button is provided; in an emergency, the user can quickly press the button to cut off the equipment's power supply. Software-level safety protection enables real-time monitoring of multiple parameters. If parameters exceed preset ranges, circuit protection is activated, emergency stop control is performed, and critical data is backed up and restored to ensure data security.

[0094] Figure 4 This demonstration showcases a single-layer data flow within a fully fiber-optic system. The power supply acts as the power source, providing power to all components, including the pump laser, control board, and host computer system, ensuring system operation. In the optical transmission path, the pump laser emits laser light, which is then distributed by a high-power pump coupler, further processed by an optical coupler, and then enters the PD probe. This converts the optical signal into an electrical signal, outputting PD sample values. These are then switched by an optical switch and finally transmitted to the spectrometer for spectral data acquisition. Simultaneously, an energy absorption tank connected to a liquid cooling device dissipates heat generated during high-power laser transmission, preventing damage from high temperatures. Temperature sensors are positioned at the bottom, surface, and nozzle of the pump laser housing to collect temperature data; the PD probe collects PD sample values ​​of the optical power. Both data are transmitted to the control board (which has PD and temperature acquisition functions). The control board aggregates the optical power and temperature data and, together with the optical switch, spectrometer, and host computer system, engages in bidirectional data exchange. The host computer system, as the core control terminal, receives data from the control board, optical switches, and spectrometers, enabling real-time monitoring of the power and temperature of each pump laser, as well as the spectral data from the spectrometer, facilitating timely understanding of the system's operating status. Simultaneously, it can send commands to adjust the control board's data acquisition frequency and strategy, and control the optical switches to switch optical paths, adapting to multi-channel pump laser time-sharing monitoring scenarios. If conditions such as excessively high temperature or abnormal power fluctuations are detected, the host computer system can trigger anomaly warnings and even perform automatic power-off and optical path switching operations to ensure system safety. Furthermore, the system supports multi-channel pump laser expansion; the repeatedly marked pump lasers in the diagram can be understood as multiple channels. Relying on the same control board and host computer system, it meets the needs of synchronous monitoring of batch pump lasers in a factory.

[0095] Figure 5 This is a schematic diagram of the cabinet structure used for equipment aging tests. The physical information is as follows: There are 5 layers in total. Layer 4 is the "aging layer" (used to house the equipment to be aged, such as pump lasers), and layer 1 is the "electrical control layer" (used to house control equipment, circuit modules, etc.). The total cabinet height is 1642.00 mm, the height of each aging layer is 210.00 mm, the distance from the top aging layer to the top edge of the cabinet is 210.00 mm, and the cabinet width is 1240.00 mm.

[0096] In summary, the optical path monitoring system can monitor the pump laser's optical power, spectrum, and other multi-dimensional indicators in real time through various methods. Combined with the testing system, it accurately judges based on preset thresholds, ensuring precise assessment of the pump laser's aging status. It covers multiple parameters such as pump cover temperature, current, and voltage, providing a comprehensive understanding of the equipment's aging condition. The cabinet's layered design, with each layer equipped with targeted devices (fiber optic mounting brackets, silicon photodiode probes, etc.), adapts to different testing needs. The coordinated operation of multiple links from the optical path to the circuitry improves testing accuracy. The liquid cooling system, through fiber laser water chillers, external liquid chillers, and liquid-cooled panels, precisely controls the temperature of the pump laser and related components (such as the laser absorber), preventing temperature fluctuations from affecting aging test results and ensuring stable system operation. The electrical control system uses a constant current and constant voltage DC power supply, combined with upper computer command switching control, to stably power the pump laser and reduce interference from power supply fluctuations in the aging test. The cabinet can be equipped with multiple product aging layers, supporting simultaneous testing of multiple pump lasers. Each aging layer device is flexibly configurable to adapt to aging tests of pump lasers with different specifications and testing requirements, resulting in strong system scalability. After receiving optical path monitoring data, the testing system quickly controls the electrical control system based on the results. The cabinet control layer centrally collects and interacts with data through optical power control cards and temperature acquisition cards, improving data processing and command execution efficiency and ensuring a smooth and efficient aging test process.

[0097] In this embodiment, compared to traditional single-station or few-station aging equipment, the testing efficiency is improved by several times or even tens of times, which can meet the high-efficiency requirements of pump source aging testing in large-scale production. The spatial light solution, through precise optical layout, utilizes a synergistic design of a 99.5% reflective and 0.5% transmittance mirror, a PD probe, and an absorber tube, combined with a cascaded structure of a 1×8 optical switch and a spectrometer, to achieve accurate acquisition of pump light power and spectral parameters. Its geometric in-circle energy calculation model based on Gaussian spot energy distribution ensures linear response of PD receiving power in high-power scenarios. The all-fiber solution replaces traditional reflective components with high-power couplers and communication fiber optic couplers, completely eliminating the problems of high-power mirror deformation and spatial light interference. Through low-loss transmission of the all-fiber link and intelligent switching of the optical switch, the system stability is improved while simplifying the complexity of the structural design. The two solutions complement each other and adapt to different application scenarios, providing an optical path monitoring solution with both accuracy and reliability for the aging process of high-power pump lasers. It can monitor multiple parameters of the pump source in real time, including power, temperature, current, voltage, and spectrum, comprehensively reflecting the performance changes of the laser during the aging process and providing rich data support for accurately assessing the aging status of the laser. It is compatible with various fiber types such as 105 / 125, 135 / 155, 200 / 220, and 220 / 242, as well as pump sources of different specifications from 8 to 800W. Through flexible interface design and parameter adjustment functions, it can adapt to diverse pump source products on the market, expanding the application range of the equipment. The host computer platform enables real-time data recording, analysis, and storage, supporting advanced functions such as power fluctuation curve fitting, accelerated lifetime prediction, and process optimization. In-depth analysis of a large amount of test data can uncover potential product quality problems and improvement directions, providing strong data support for product development and production process optimization.

[0098] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A pump laser burn-in test system, characterized by, The application relates to a pump laser device for aging test, which comprises the following parts: a light path monitoring system, a liquid cooling heat dissipation system, an electrical control system, a test system and a cabinet, at least one pump laser device to be tested is installed in the cabinet; the light path monitoring system is used for monitoring at least one monitoring index of the pump laser device in real time to obtain monitoring index data; the test system is used for monitoring the monitoring index data and controlling the electrical control system according to a monitoring result and a preset monitoring index threshold value; the electrical control system supplies power for the pump laser device through a constant-current constant-voltage direct-current power supply and switches the constant-current constant-voltage direct-current power supply according to a control instruction sent by an upper computer; the liquid cooling heat dissipation system is used for temperature control during the aging process of the pump laser device.

2. The system of claim 1, wherein, In the application, the cabinet comprises a plurality of product aging layers and an electrical cabinet control layer, the pump laser device is installed in the product aging layers, and each product aging layer comprises one or more of the following devices: at least one optical fiber fixing frame, at least one silicon photodiode probe, at least one laser light absorption cylinder, at least one high-reflection low-transmission lens and at least one temperature detector; the electrical cabinet control layer is provided with an optical power control card, a temperature acquisition card, an optical switch and an optical spectrum instrument, and is connected with the test system, the temperature acquisition card is connected with the temperature detector of the product aging layer, and the optical power control card is connected with the silicon photodiode probe of the product aging layer.

3. The system of claim 2, wherein, The liquid cooling heat dissipation system comprises an optical fiber laser water cooling machine, an external liquid cooling machine and a liquid cooling panel, each product aging layer is provided with one optical fiber laser water cooling machine, and the cabinet is connected with the external liquid cooling machine, the cabinet cools and lowers the temperature of the pump laser device and the silicon photodiode probe through the liquid cooling panel, and performs liquid cooling heat dissipation on the laser light absorption cylinder.

4. The method of claim 1, wherein, The monitoring index comprises one or more of the following: pump cover plate temperature, optical power, current, voltage, spectrum, bottom plate temperature and nozzle temperature, the monitoring system is used for monitoring whether the monitoring index exceeds the preset monitoring index threshold value, and sends a power-off control instruction to the electrical control system when the monitoring index exceeds the preset monitoring index threshold value.

5. The system of claim 1, wherein, The light path monitoring system is used for: processing the light beam emitted by the pump laser device through the high-reflection low-transmission lens, and performing heat dissipation on the energy absorption barrel and the pump laser device through the liquid cooling heat dissipation system, wherein the reflected energy is absorbed by the energy absorption barrel, the transmitted energy enters the silicon photodiode probe and the optical fiber probe, the optical fiber probe, the optical switch and the optical spectrum instrument are sequentially connected, the optical switch realizes light path switching through switching of the light path, and the optical spectrum instrument is used for acquiring a spectrum monitoring index. The cabinet comprises a plurality of product aging layers, each product aging layer comprises N optical fiber probes, N silicon photodiode probes, N pump laser devices and N high-reflection low-transmission lenses with 99.5% reflection and 0.5% transmission, and N is greater than 1.

6. The system of claim 5, wherein, ​ ​ Among them, every 2 layers of adjacent product aging layers fix optical fiber probe receiving transmitted light on the side of the vertical structure for fixing the silicon photodiode probe; The output end of the optical switch is connected with the input end of the attenuator, and the output end of the attenuator is connected with the spectrometer through an optical fiber.

7. The system of claim 1, wherein, Among them, The optical path monitoring system is used for: Based on the pump coupler, the optical beam of the pump laser is mechanically processed to enable the energy absorption bucket to receive the first input optical beam of the pump laser and the second input optical beam of the pump laser through the optical fiber coupler, wherein the energy of the first input optical beam is higher than that of the second input optical beam; The liquid cooling heat dissipation system is used for dissipating heat for the energy absorption bucket and the pump laser; The second input optical beam is processed through the optical fiber coupler to enable the third input optical beam to enter the optical switch and the optical spectrum analyzer in turn, wherein the optical switch is used for switching the optical path, the optical spectrum analyzer is used for acquiring the optical spectrum monitoring index, and the energy of the third input optical beam is lower than that of the second input optical beam.

8. The system of claim 7, wherein, Among them, The proportion of the first input optical beam and the second input optical beam is 99.99% and 0.01% respectively, and the light splitting ratio of the optical fiber coupler is 1:1, The optical fiber coupler inputs the fourth input optical beam into the tail fiber, and the fourth input optical beam and the third input optical beam are 50% of the second input optical beam.

9. The system of claim 1, wherein, Further comprising a protection system, the protection system at least includes: a photodetector located in the optical path, a thermistor distributed in the key parts of the equipment, a leakage protection switch, an overcurrent protection device, a water leakage protection sensor, and an emergency stop button.

10. An electronic device, comprising: The electronic device comprises the pump laser aging test system according to any one of claims 1-9.

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