A high power laser automatic test equipment and method

Abstract

The application discloses a kind of high-power laser automatic test equipment and test method, comprising: pneumatic optical test platform, power meter, spectrometer, oscilloscope, beam quality tester, infrared thermal imager, infrared observation instrument, control host and host computer;Each instrument is fixedly installed on pneumatic optical test platform;The laser to be measured is clamped on pneumatic optical test platform;Infrared thermal imager and infrared observation instrument are fixed above pneumatic optical test platform by suspension support;The lens of infrared thermal imager is aligned with the key temperature measuring area of the laser to be measured, and temperature data is transmitted to control host;The lens of infrared observation instrument is aligned with the output fiber optical path area of the laser to be measured;Control host includes data acquisition module and hardware emergency stop relay loop;The application is automatically synchronized by each detection instrument Test, identify fault through temperature-spot correlation, double emergency stop of software and hardware improves test safety, reduces artificial detection error, improves factory test efficiency.

Description

Technical Field

[0001] This application relates to the field of laser testing technology, and in particular to an automatic testing device and method for high-power lasers. Background Technology

[0002] High-power lasers must undergo comprehensive testing at the factory, including output power, wavelength, linewidth, Raman suppression ratio, beam quality, time-domain waveform, temperature of key components, and fiber leakage. Narrow-linewidth models also need to be monitored for modulation instability (MI) or stimulated Brillouin scattering (SBS) nonlinear degradation.

[0003] Currently, most laser testing platforms adopt a manual, item-by-item testing mode: operators manually control separate instruments such as power meters, spectrometers, oscilloscopes, and infrared thermal imagers, manually record data, and visually judge defects by infrared light spots. Each instrument operates independently and the data is not interconnected.

[0004] This testing mode has low efficiency (2-4 hours per unit), large errors in human reading and visual judgment, and easy to miss subtle light leakage and MI / SBS degradation; data from multiple instruments are isolated and cannot be analyzed in conjunction, and there is a lack of linkage emergency stop, and personnel face the risk of burns when facing high-power optical paths at close range; the vibration isolation of ordinary optical platforms is insufficient, which also affects the testing stability of high-precision parameters such as M² and spectral linewidth. Summary of the Invention

[0005] The main objective of this application is to provide an automatic testing device and method for high-power lasers, which aims to solve the problems of low efficiency, lack of operator error, and insufficient safety in existing laser testing platforms.

[0006] To achieve the above objectives, this application provides an automatic testing device and method for high-power lasers; the automatic testing device includes: a pneumatic optical testing platform, a power meter, a spectrometer, an oscilloscope, a beam quality tester, an infrared thermal imager, an infrared observer, a control host, and a host computer; The power meter, the spectrometer, the oscilloscope, and the beam quality tester are respectively fixedly mounted on the pneumatic optical test platform; The laser under test is mounted on the installation station of the pneumatic optical testing platform; The infrared thermal imager and the infrared observation instrument are fixed above the pneumatic optical testing platform by a suspension bracket; Each testing instrument communicates with the control host through a standardized interface, and the control host communicates with the host computer through a network interface. The lens of the infrared thermal imager is aimed at the key temperature measurement area of ​​the laser under test, and is used to collect the temperature of the key temperature measurement area of ​​the laser under test in real time and transmit the temperature data to the control host; the key temperature measurement area includes fiber optic splice, fiber optic end cap, optical lens and pump electrical device. The lens of the infrared observer is aimed at the output fiber optic path area of ​​the laser under test, and is used to convert the invisible near-infrared laser output by the laser under test into a visible light spot image, and transmit the image data to the control host. The control host includes a hardware emergency stop relay circuit, which is used to cut off the output to the laser under test in the event of a software or hardware malfunction. The host computer is equipped with integrated testing software, which integrates an instrument driving module and a data acquisition and analysis module. The instrument driving module is used to automatically acquire and store laser power, spectrum, beam quality, device temperature, fiber infrared light intensity, and time-domain waveform data. The data acquisition and analysis module is used to analyze the received temperature data and image data.

[0007] The comprehensive testing software includes an anomaly detection module, which is configured to output an emergency stop signal to cut off the output of the laser under test when at least one of the following abnormal conditions is detected: abnormal inlet / outlet water temperature / flow rate, overheating of fiber optic splice, overheating of device, fiber optic leakage, modulation instability (MI) / stimulated Brillouin scattering (SBS) optical degradation, or pulse anomaly.

[0008] This application provides an automatic testing method for high-power lasers, the method comprising: Step S1: Mount the laser under test onto the tooling of the pneumatic optical testing platform and connect the liquid cooling pipeline, power supply line and laser output optical path; Step S2: Select the model of the laser to be tested through the comprehensive testing software of the host computer, and load the preset detection standard threshold of the model; Step S3: Start the automatic test through the comprehensive test software, and automatically control the output power of the laser under test to gradually increase; Step S4: During the power ramp-up and aging process, the output power, spectral parameters, beam quality, device temperature, infrared spot and time domain waveform data of the laser under test are collected synchronously and continuously by multiple testing instruments. Step S5: The comprehensive testing software automatically determines whether each collected data meets the preset test standard threshold. If all indicators are normal, the aging test of the preset duration is completed and the factory test report is automatically generated. Step S6: If any data during the test does not meet the preset detection standard threshold, an automatic emergency stop will be triggered immediately, an alarm prompt will pop up, and all original fault data will be stored.

[0009] In the embodiments of this application, multiple testing instruments can be integrated into a pneumatic optical testing platform to simultaneously acquire multi-dimensional data on laser power, spectrum, beam quality, device temperature, infrared spot size, and time-domain waveform. Thermal and optical path images are acquired using an infrared thermal imager and an infrared observer. Integrated testing software identifies device overheating, fiber optic leakage, MI / SBS optical degradation, and pulse anomaly faults. A dual emergency stop protection system combining software and hardware relay circuits mitigates the risk of software failure. Power ramp-up and aging tests can be automatically completed, saving original fault data in case of anomalies and automatically outputting a factory report after normal testing. This application achieves automated synchronous testing of various instruments, fault identification through temperature-spot correlation, and dual hardware and software emergency stops, reducing manual testing errors, improving testing efficiency, and enhancing the safety and reliability of high-power laser testing data. Attached Figure Description

[0010] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0011] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed herein.

[0012] Figure 1 A structural block diagram of an automatic testing device for high-power lasers provided in this application embodiment; Figure 2 A structural block diagram of a high-power laser under test provided for an embodiment of this application; Figure 3 A layered structure block diagram of an automatic testing device for high-power lasers provided in this application embodiment; Figure 4 A flowchart illustrating an automated testing method for a high-power laser, provided as an embodiment of this application. Detailed Implementation

[0013] 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.

[0014] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0015] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0016] 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "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. 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.

[0017] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, this embodiment provides an automatic testing device for high-power lasers, including: an infrared thermal imager 1, an infrared observer 2, a pneumatic optical testing platform 3, a laser under test 4, a beam quality tester 9, an optical fiber end cap 10, a spectrometer 11, an oscilloscope 12, a power meter 13, a control host 14, and a host computer 15.

[0019] It should be noted that the laser under test 4 can be a fiber laser, a narrow-linewidth seed source, or a semiconductor pump source. This high-power laser automated testing equipment can be used for automated aging and performance testing of the aforementioned complete machines at the factory.

[0020] The pneumatic optical testing platform 3 serves as the load-bearing reference for all optical testing instruments. It features a honeycomb-layered stainless steel tabletop, supported by four independent inverted airbags and an automatic balancing pressure regulating valve. The platform automatically corrects its level under load, with a full-load tilt angle of less than 0.02°, a vertical natural frequency of less than 1.6 Hz, and a horizontal natural frequency of less than 2 Hz. This effectively isolates the platform from low-frequency vibrations caused by personnel walking on the ground, air compressors, and cooling fans. The tabletop surface is uniformly dotted with M6 standard mounting threaded holes for securing various optical supports and testing instruments.

[0021] The laser under test 4 is clamped in the tooling position on the left side of the pneumatic optical test platform 3, and its internal components include an electrical module 5 and an optical module 6. The bottom of the laser under test 4 is connected to a water inlet pipe 7 and a water outlet pipe 8, forming a liquid cooling circulation loop to provide cooling for the operation of the laser under test.

[0022] The infrared thermal imager 1 and the infrared observer 2 are fixed to the crossbeam above the pneumatic optical testing platform 3 by a suspension bracket. The lens of the infrared thermal imager 1 is vertically downward aimed at the key temperature measurement area of ​​the laser under test 4. The key temperature measurement area includes the fiber optic splice, the fiber optic end cap 10 (which can be encapsulated in an external QBH output head assembly), and the electrical module 5 area (including optical lenses and pump electrical devices). The imager 1 transmits the real-time acquired temperature data to the control host. The lens of the infrared observer 2 is aimed at the side of the output fiber of the laser under test 4 and the area of ​​the fiber optic end cap 10. It is used to convert the invisible infrared laser output by the laser under test into a visible light spot image and transmit the image data to the control host. The fiber optic end cap 10 is a precision component installed at the end of a fiber optic patch cord or fiber optic connector. Its main function is to protect the fiber end face and ensure an efficient and stable connection between fibers.

[0023] The beam quality tester 9, spectrometer 11, oscilloscope 12, and power meter 13 are arranged sequentially on the right side of the pneumatic optical test platform 3. The laser output from the laser under test 4 is emitted through the fiber end cap 10 and then connected to each testing instrument in the order of the optical path.

[0024] The spectrometer 11 is used to detect the laser output wavelength, spectral linewidth, and Raman suppression ratio, and uploads the spectral data to the control host in real time. The data is then transmitted to the host computer 15 via a network interface for automatic recording and judgment by the integrated testing software.

[0025] The control host 14 and the host computer 15 are arranged in a control cabinet below the pneumatic optical test platform 3. The infrared thermal imager 1, the infrared observer 2, the beam quality tester 9, the spectrometer 11, the oscilloscope 12, and the power meter 13 are all connected to the control host 14 via RS485 or Ethernet communication cables. The control host 14 communicates with the host computer 15. The control host includes a hardware emergency stop relay circuit, which is used to cut off the output of the laser under test in the event of a software or hardware malfunction. The host computer 15 is equipped with integrated test software, which integrates an instrument drive module and a data acquisition and analysis module. The instrument drive module is used to automatically acquire and store laser power, spectrum, beam quality, device temperature, fiber infrared light intensity, and time-domain waveform data. The data acquisition and analysis module is used to analyze the received temperature data and image data. The comprehensive testing software includes an anomaly detection module, which is configured to output an emergency stop signal to drive the hardware emergency stop relay circuit to cut off the output of the laser under test when at least one of the following abnormal conditions is detected: abnormal inlet / outlet water temperature / flow rate, overheating of fiber optic splice, overheating of device, fiber optic leakage, modulation instability (MI) / stimulated Brillouin scattering (SBS) optical degradation, or pulse anomaly.

[0026] In one embodiment, the anomaly determination module includes a temperature anomaly identification unit, and the infrared thermal imager is an uncooled infrared temperature measurement device. The temperature anomaly identification unit is configured to select key temperature measurement areas in the temperature cloud map acquired by the infrared thermal imager, and display the highest temperature and average temperature rise of the temperature measurement area in real time; when the highest temperature of the temperature measurement area exceeds a preset temperature threshold, it will automatically alarm and trigger an emergency stop.

[0027] In one embodiment, the anomaly determination module further includes an AI image recognition module, which is configured to automatically identify bright spots on the fiber end face, fiber breakage and light leakage spots, and long strip spots of cladding light stripping failure in the spot image after converting the invisible near-infrared laser into a visible spot image. The response band of the infrared observer 2 is selected from at least one of 915nm, 1064nm, and 1550nm.

[0028] In one embodiment, the comprehensive testing software further includes an index analysis module, which is configured to correlate the temperature data of the infrared thermal imager with the light leakage image of the infrared observer 2 according to spatial location; when the same tested part shows abnormal temperature rise and light leakage spot at the same time, it is determined to be a high-risk fault of fiber optic splice failure or fiber optic damage, and the highest priority emergency stop is immediately triggered.

[0029] In one embodiment, the emergency stop signal includes a hardware emergency stop signal, and the hardware emergency stop relay circuit is configured to trigger the hardware emergency stop relay circuit to cut off the pump drive power supply of the laser under test when the monitoring instruments output the hardware emergency stop signal.

[0030] In one embodiment, the emergency stop signal includes a software emergency stop signal, and the integrated test software further includes a software emergency stop command module; The software emergency stop command module is configured to issue a software emergency stop signal to cut off the pump drive power supply of the laser under test based on the judgment result of the anomaly judgment module.

[0031] like Figure 2 As shown, an embodiment of this application provides a high-power laser under test 4, which includes: a pump source 401, a beam combiner 402, an active optical fiber 403, a cladding power stripper (CPS) 404, an optical fiber end cap 10, a power supply module 405, and a signal control module 406.

[0032] It should be noted that the fiber optic end cap 10 is a quartz optical end cap. This fiber optic end cap 10 can be used directly as the output interface of the laser 4, or it can be encapsulated inside an external QBH (Quick Beam Head) assembly. The output end of the QBH assembly serves as a standardized interface for the external transmission optical cable end of the entire system. The laser beam is output after being expanded by the optical end cap. The fiber cladding power stripper is used to remove unwanted cladding power from the fiber amplifier and laser system, thereby improving the system's efficiency and stability.

[0033] The pump source 401 is an array of multiple semiconductor pump lasers, and the output pump light is transmitted to the combiner 402 via optical fiber. The combiner 402 couples the multiple pump lights into the inner cladding of the active optical fiber 403. The active optical fiber 403 is a rare-earth-doped double-clad optical fiber, and the pump light is absorbed by the gain medium in the active optical fiber 403 and converted into signal laser. The cladding power stripper 404 is disposed at the output end of the active optical fiber 403 to strip the unabsorbed residual cladding light and prevent the cladding light from entering the fiber end cap and causing overheating. The output end of the fiber end cap 10 is a laser output interface, which expands the laser output from the active optical fiber 403 and outputs it outward.

[0034] The pump source 401 is connected to the combiner 402, the combiner 402 to the active optical fiber 403, the active optical fiber 403 to the cladding power stripper 404, and the cladding power stripper 404 to the optical fiber end cap 10 via optical fiber fusion splices. The x in the figure indicates the location of each optical fiber fusion splice. The power module 405 provides driving power to the pump source 401. The signal control module 406 controls the output power and operating sequence of the pump source 401 based on control commands issued by the host computer. A liquid-cooled circulation loop is formed by the inlet pipe 7 and the outlet pipe 8. The low-temperature coolant in the inlet pipe 7 flows through the pump source 401, active optical fiber 403, and other heat-generating devices of the laser under test 4 to provide cooling, while the high-temperature liquid carrying heat is discharged from the outlet pipe 8, thus forming a dynamically controllable liquid-cooled circulation system.

[0035] During the testing of the laser under test, the infrared thermal imager's temperature measurement area covers all fiber optic splice points x, the combiner 402, the cladding power stripper 404, and the power module 405, acquiring the overall temperature distribution of these locations in real time. Among these, the fiber optic splice points x, due to their high contact thermal resistance, are the most prone to overheating under high-power operation. The temperature anomaly identification unit of the integrated testing software selects a temperature measurement area for each splice point x and sets an independent temperature threshold. If the fiber optic end cap 10 has quartz damage or contamination, it will rapidly heat up due to laser absorption; therefore, the infrared thermal imager 1 performs focused temperature monitoring on the fiber optic end cap 10.

[0036] The imaging area of ​​the infrared observer 2 covers the side of the active optical fiber 403, each optical fiber splice x, the cladding power stripper 404, and the optical fiber end cap 10. When the splice quality of the optical fiber splice x is poor, the active optical fiber 403 is damaged, or the cladding power stripper 404 fails to strip, cladding light leakage will occur. The infrared observer 2 converts the invisible near-infrared leaked light into a visible light spot image, and the AI ​​image recognition module of the integrated testing software automatically identifies the location and intensity of the leaked light spot. When there is a defect inside the optical fiber end cap 10, the laser is scattered inside the end cap, and the infrared observer 2 can capture the abnormal bright spot at the optical fiber end cap 10.

[0037] The integrated testing software is configured to correlate the temperature data collected by the infrared thermal imager 1 with the light leakage image collected by the infrared observer 2 according to the spatial location: if a certain fiber optic splice x shows both abnormal temperature rise and light leakage spot, it is determined that the splice has a high-risk fault of poor splicing or fiber damage, and the highest priority emergency stop is immediately triggered to cut off the driving power of the pump source 401 to prevent the fiber from burning out or laser leakage from injuring people.

[0038] In addition, the oscilloscope acquires the laser time-domain signal. When MI modulation instability or SBS stimulated Brillouin scattering occurs in the active fiber 403, the time-domain waveform will exhibit periodic modulation or reverse pulse characteristics. The integrated testing software automatically identifies the above optical degradation phenomena and triggers an emergency stop. The spectrometer monitors the center wavelength, linewidth, and Raman suppression ratio of the output laser. When stimulated Raman scattering occurs in the active fiber 403, Raman-Stokes peaks will appear in the spectrum, and the software automatically determines whether the Raman suppression ratio meets the standard.

[0039] In summary, when the integrated testing software detects at least one of the following abnormal conditions: abnormal inlet / outlet water temperature / flow rate, overheating of fiber optic splice, overheating of device, fiber optic leakage, unstable modulation (MI) / stimulated Brillouin scattering (SBS) optical degradation, or pulse abnormality, it outputs an emergency stop signal to drive the hardware emergency stop relay circuit, thereby cutting off the pump power supply output of the laser under test.

[0040] Figure 3 This is a layered structural block diagram of an automatic testing device for high-power lasers provided in an embodiment of this application.

[0041] The hierarchical structure diagram is divided into three layers: the detection instrument layer 301, the control host layer 302, and the host computer software layer 303. It features a bidirectional emergency stop control circuit and integrates an AI image recognition module and a hardware emergency stop relay circuit. This embodiment, in conjunction with the diagram, provides a complete explanation of the three-layer hierarchical interaction, data flow, dual emergency stop, and fault storage. The AI ​​image recognition module is configured to automatically identify bright spots on the fiber end face, fiber breakage and light leakage spots, and long strip spots of cladding light stripping failure in the light spot image after converting the invisible near-infrared laser into a visible light spot image.

[0042] In this embodiment, the testing instrument layer 301 includes a power meter, a spectrometer, an oscilloscope, a beam quality tester, an infrared thermal imager, and an infrared observer. All testing instruments output two types of signals via a standardized Ethernet / RS485 communication interface: raw measurement data and abnormal trigger signals. The control host layer 302 includes a hardware emergency stop relay circuit, hardware interlocks, and an emergency stop button input. The hardware emergency stop relay circuit can be triggered by the hardware interlock relationship or by pressing the emergency stop button input to cut off the pump power supply to the laser under test.

[0043] In the instrument layer 301, the power meter uploads real-time power sampling data; the spectrometer uploads real-time wavelength, linewidth, and Raman suppression ratio spectral data; the oscilloscope uploads time-domain waveforms, carrying MI and SBS nonlinear distortion characteristic data; the beam quality tester uploads M² and BPP beam parameters; the infrared thermal imager outputs temperature cloud maps and temperature values ​​at key points; and the infrared observer outputs real-time visible spot video streams.

[0044] like Figure 3As shown, on the one hand, the measurement data is sent down to the data acquisition module; on the other hand, once the instrument detects an over-limit phenomenon, it can directly output a hard-wired emergency stop signal to connect to the hardware emergency stop relay circuit, so as to realize direct triggering protection on the instrument side.

[0045] The data acquisition and parsing module is configured to receive all raw measurement data collected and sent by the testing instrument layer 301, complete the parsing and format conversion of the output signals of various testing instruments, and forward the standardized data to other functional modules of the host computer software layer 303. At the same time, it receives instrument control commands sent by the host computer through the integrated testing software and sends them to each testing instrument to realize instrument parameter configuration, start and stop and acquisition trigger, and acts as a relay hub between the hardware testing instruments and the integrated testing software of the host computer.

[0046] The hardware emergency stop relay circuit has two trigger sources: the first is the hardware emergency stop signal directly output by each detection instrument layer 301; the second is the software emergency stop command issued by the host computer through the integrated test software.

[0047] The relay circuit output is directly wired to the power supply terminal of the laser under test. Once any emergency stop trigger is received, the hardware relay directly cuts off the pump drive power of the laser under test, regardless of whether the host computer software is running normally. Even if the software crashes or the system freezes, the hardware circuit can still perform the cut-off operation.

[0048] The host computer integrated testing software includes an instrument driver module, an AI image recognition module, an anomaly detection module, an index analysis module, a software emergency stop command module, and a data storage module. The instrument driver module is primarily used for driver adaptation of power meters, spectrometers, oscilloscopes, beam quality testers, infrared thermal imagers, and infrared observers. It converts upper-level test commands into instrument-recognizable control signals and sends them to the control host, enabling instrument parameter configuration and triggering data acquisition. It also receives raw instrument data forwarded from the control host, performs data parsing and standardization, and distributes it to the AI ​​image recognition module, index analysis module, and data storage module, shielding the differences in communication protocols between different instruments and enabling automated collaborative control of multiple instruments.

[0049] The AI ​​image recognition module receives temperature cloud images from an infrared thermal imager and visible light spot video streams from an infrared observer. It automatically identifies bright spots on the fiber optic end face, light leakage spots due to fiber breakage, and long stripes of light due to cladding stripping failure in the infrared observer's image, outputting the defect location, spot area, and spot brightness. For the infrared thermal imager's temperature cloud image, it analyzes preset key temperature measurement areas, identifies localized high-temperature regions, and outputs the high-temperature location and temperature value. The image defect identification results are then output to the anomaly detection module. Without requiring manual visual inspection, it can identify faults that are difficult to detect with the naked eye, such as weak light leakage and localized overheating.

[0050] The anomaly detection module is used to pre-store preset detection standard thresholds corresponding to different laser models; it receives power, spectrum, beam quality, and time-domain waveform data output by the instrument driver module, and simultaneously receives image defect recognition results output by the AI ​​image recognition module. It compares the real-time acquired data with the preset detection standard thresholds item by item to identify abnormal operating conditions such as abnormal inlet / outlet water temperature / flow, fiber optic splice overheating, device overheating, fiber optic leakage, modulation instability (MI) / stimulated Brillouin scattering (SBS) optical degradation, pulse anomalies, power deviations, and unqualified spectral indicators. Once an anomaly is detected, an anomaly event signal is generated, and the fault type, fault location, and measured parameters are pushed to the software emergency stop command module and the data storage module.

[0051] The performance indicator analysis module receives standardized measurement data and performs statistical calculations and trend analysis on various performance indicators. It calculates power fluctuations and stability for power; calculates center wavelength deviation, spectral linewidth, and Raman suppression ratio for the spectrum; calculates the M² factor and BPP beam parameter product for beam quality; calculates the highest temperature, average temperature rise, and temperature rise rate in key areas for temperature data; and performs spectral analysis on the oscilloscope time-domain waveform to extract MI and SBS waveform distortion features. Simultaneously, it spatially correlates infrared thermal imager temperature data with infrared observation spot images. When abnormal temperature increases and light leakage spots simultaneously occur at the same measured location, it is marked as a high-risk fault of fiber optic splice failure or fiber breakage, increasing the priority of this fault assessment and outputting it to the anomaly assessment module. When testing is normal, it outputs the test results for each power point for factory report generation; when a continuous performance degradation trend is detected, it outputs warning information.

[0052] The software emergency stop command module receives abnormal event signals output by the anomaly detection module. On one hand, it sends a software emergency stop command to the control host, driving the hardware emergency stop relay circuit to cut off the pump drive power of the laser under test. On the other hand, it sends a software shutdown command to the signal control module of the laser under test, achieving software-level shutdown and forming dual-cutoff redundancy. Simultaneously, an alarm window pops up on the host computer interface, displaying the fault time, fault type, and a comparison of the measured value with the threshold, triggering an audible and visual alarm. The test process enters a locked state, requiring manual reset by the operator to release the emergency stop.

[0053] The data storage module is responsible for the persistent storage and management of test data, fault data, and report files. During normal testing, it stores raw measurement data with timestamps and index analysis results. In the event of an emergency stop fault, it automatically extracts a complete set of raw data for a period of time before and after the fault, including spectral curves, time-domain waveforms, thermal imaging cloud maps, infrared spot images, liquid cooling flow rates, operating power, and other operating condition information, assigning a unique fault number for easy fault tracing. After all test indicators pass, it automatically generates a PDF format factory inspection report by retrieving the full-process test data. It also supports retrieving historical test records by laser number, time, and fault type.

[0054] Figure 4 A flowchart illustrating an automated testing method for a high-power laser, provided as an embodiment of this application.

[0055] like Figure 4 As shown, an automatic testing method for high-power lasers is applied to an automatic testing equipment for high-power lasers, wherein the equipment is the automatic testing equipment for high-power lasers described in the foregoing embodiments, and the testing method includes the following steps S1 to S6: Step S1: Mount the laser under test onto the tooling of the pneumatic optical testing platform and connect it to the liquid cooling pipeline, power supply line and laser output optical path.

[0056] In this embodiment, the left side of the pneumatic optical testing platform has a pre-set laser clamping station, which is equipped with positioning pin holes and a quick-change fixture base plate. During clamping, the laser under test is first placed stably on the fixture base plate, aligning the positioning holes at the bottom of the laser with the positioning pins on the fixture. After pushing the laser to the limit stop, the quick clamps on both sides are locked to complete the mechanical fixation of the laser. The quick-change fixture base plate can be replaced according to different laser sizes, and is compatible with various models such as fiber lasers, narrow linewidth seed sources, and semiconductor pump sources, allowing the laser under test to be clamped on the fixture of the pneumatic optical testing platform.

[0057] Then connect the liquid cooling pipeline. Connect the outlet pipe of the external chiller to the inlet pipe of the laser under test through a quick-connect connector, and connect the return pipe of the external chiller to the outlet pipe of the laser under test through a quick-connect connector. After connection, open the water circuit valve of the chiller and observe whether the flow meter reading in the integrated test software reaches the preset temperature threshold and preset flow threshold to confirm that there is no leakage in the water circuit and the circulation is normal.

[0058] When connecting the power supply line, the power module of the laser under test is connected to the programmable power output terminal of the test equipment via an aviation plug, and the signal control module of the laser under test is connected to the IO control port of the control host via a DB9 signal cable. After the connection is completed, the integrated test software sends a communication handshake command to the laser under test to confirm that the power supply line and the signal control line are connected normally.

[0059] During laser output optical path docking, the output end of the fiber cap or QBH of the laser under test is connected to the test optical path through a fiber optic adapter or spatial optical collimator, so that the output laser passes through the beam splitter in sequence and is incident on the power meter, spectrometer, and beam quality tester respectively; at the same time, adjust the bracket positions of the infrared thermal imager and infrared observer so that the infrared thermal imager lens covers all fiber fusion splices, combiners, cladding power strippers, and fiber cap areas of the laser, and the infrared observer lens is aligned with the side of the active fiber and each fusion splice to confirm that the two images are clearly displayed in the integrated test software interface.

[0060] Step S2: Select the model of the laser to be tested through the comprehensive testing software of the host computer, and load the preset detection standard threshold of the model.

[0061] In this embodiment, the operator clicks the "Model Selection" drop-down menu on the main interface of the comprehensive testing software on the host computer. The menu contains a pre-stored model parameter library for various models, such as fiber lasers, narrow linewidth seed sources, and semiconductor pump sources, categorized by product series. After selecting the model that matches the laser being tested, the software automatically loads all the preset detection standard thresholds corresponding to that model from the local configuration file. The preset detection standard thresholds include three categories: optical parameter thresholds, thermal parameter thresholds, and safety judgment thresholds. The optical parameter thresholds cover the rated output power range, allowable deviation of the center wavelength, upper limit of 3dB spectral linewidth, lower limit of Raman suppression ratio, upper limit of M² factor, and upper limit of BPP beam parameter product. The thermal parameter thresholds cover the maximum allowable temperature of each fiber splice, the maximum allowable temperature of the fiber end cap, the maximum allowable temperature of the pump bar, and the upper limit of the overall temperature rise rate. The safety judgment thresholds cover the infrared leakage spot area threshold, MI modulation instability amplitude threshold, SBS reverse pulse power threshold, and upper and lower limit thresholds for temperature and water flow rate. After the preset detection standard thresholds are loaded, the integrated testing software displays all testing items and their corresponding standard thresholds in a parameter list on the interface for operators to verify and confirm. If it is necessary to temporarily adjust the thresholds for a specific batch, operators can manually modify the threshold values ​​of the corresponding parameters after authorization verification. The modified configuration can be saved as a new model template for direct use in subsequent tests of the same batch. After confirming that the preset detection standard thresholds are correct, the operator clicks the "Confirm Load" button. The integrated testing software then sends each preset detection standard threshold to the corresponding instrument driver module and anomaly detection module, completing the parameter initialization before testing.

[0062] Step S3: Start automatic testing through comprehensive testing software, and automatically control the output power of the laser under test to gradually increase.

[0063] In this embodiment, the operator clicks the "Automatic Test" button on the integrated testing software interface. The software first performs a pre-start self-test: confirming that the liquid cooling flow rate meets the standard, all testing instruments are online, and the hardware emergency stop relay circuit is in standby mode. After the self-test passes, it sends a laser enable command to the control host, controlling the laser under test to enter the working preparation state from the standby state.

[0064] Subsequently, the integrated testing software, following the preset power ramp-up curve for the laser model, outputs power command signals to the power module of the laser under test step by step through the signal control module, controlling the output power to increase gradually from 0% of the rated power. For example, the ramp-up curve is divided into five power levels: 10%, 25%, 50%, 75%, and 100%. After each power level is reached, the laser is maintained at that power for a preset stabilization time (e.g., 30 seconds) until the thermal state and optical output of the laser under test stabilize before moving to the next power level. During the stabilization period of each power level, the integrated testing software simultaneously triggers the spectrometer, beam quality tester, and oscilloscope to complete a full parameter acquisition at that power point, while the power meter, infrared thermal imager, and infrared observer continuously acquire data throughout the process.

[0065] During the power ramp-up process, the integrated testing software monitors the deviation between the actual output power and the given power in real time. If the actual power deviates from the given value by more than the preset allowable range (e.g., ±5%), the software automatically pauses the ramp-up and marks the power as abnormal. If any device overheats, fiber optic leakage, time-domain waveform abnormalities, or optical parameters exceed the standard occur during operation at any power level, the software immediately interrupts the ramp-up process and jumps to step S6 to trigger emergency stop protection. After all power levels have been ramped up and all parameters are normal, the laser is maintained at 100% rated power and enters the aging test stage, followed by step S4.

[0066] Step S4: During the power ramp-up and aging process, the output power, spectral parameters, beam quality, device temperature, infrared spot and time domain waveform data of the laser under test are collected synchronously and continuously by multiple testing instruments.

[0067] In this embodiment, the integrated testing software triggers each testing instrument through a unified clock synchronization signal to achieve parallel acquisition of various parameters. All parameters are timestamped and uploaded to the data storage module of the host computer in real time.

[0068] The power meter receives the laser light after it has been split by the laser under test through a photosensitive probe, and uploads a set of real-time power values ​​to the integrated test software every second. The software continuously records the power fluctuation curves during the entire power ramp-up process and the aging stage, and calculates the power stability.

[0069] Spectral parameter acquisition is performed by a spectrometer. The laser beam is split by a beam splitter and then sent into the entrance slit of the spectrometer. The integrated testing software triggers spectral acquisition at regular intervals during the stabilization period and aging stage of each power level, automatically reads the center wavelength, 3dB spectral linewidth and Raman light intensity, and calculates the Raman suppression ratio. For narrow linewidth lasers, the software also identifies the ASE amplified spontaneous emission noise level.

[0070] Beam quality acquisition is performed by a beam quality tester, which receives the collimated laser beam, automatically scans the beam waist radius at different positions and calculates the far-field divergence angle, and obtains the product of the M² factor and the BPP beam parameters; at least one beam quality measurement is performed for each power level, and the measurement results are automatically associated with the current power point.

[0071] Device temperature acquisition is performed by an infrared thermal imager. The lens of the infrared thermal imager is aimed at the fiber fusion splice, combiner, cladding power stripper, fiber end cap, pump bar, and driver circuit board terminals in the electrical module of the laser under test, and continuously acquires the temperature cloud map of the entire field at a frame rate of not less than 1 Hz. The integrated test software extracts the highest temperature and average temperature rise in real time for each preset key temperature measurement area, and plots the temperature change curve of each area with power and time.

[0072] Infrared spot acquisition is accomplished by an infrared observer. The infrared observer is aimed at the side of the active fiber of the laser under test, each fiber fusion splice, cladding power stripper and fiber end cap, and converts the invisible near-infrared laser into a visible spot image, which is transmitted in real time to the AI ​​image recognition module of the integrated test software in the form of a video stream. The software performs light leakage spot detection on each frame of the image and records the position, area and brightness changes of the spot.

[0073] Time-domain waveform acquisition is performed by an oscilloscope with a sampling rate of no less than 1 GS / s. The laser time-domain electrical signal is acquired through a photoelectric probe, and the time-domain fluctuation waveform of the output power is continuously recorded. The integrated test software has a built-in waveform analysis algorithm to perform real-time spectrum analysis and feature extraction on the acquired time-domain signal, and to identify optical degradation phenomena such as MI modulation instability, SBS stimulated Brillouin scattering, pulse amplitude distortion, and repetition frequency shift.

[0074] The above six types of data are displayed in a unified timeline in the integrated testing software. Operators can simultaneously observe the real-time changes of output power, device temperature, spectral parameters, infrared spot and time-domain waveform on the software interface. All raw data are synchronously written to the local database for automatic judgment in subsequent step S5 and fault tracing in step S6.

[0075] Step S5: The comprehensive testing software automatically determines whether each collected data meets the preset detection standard threshold. If all indicators are normal, the aging test of the preset duration is completed and a factory test report is automatically generated.

[0076] In this embodiment, the anomaly detection module of the comprehensive testing software performs real-time judgment on each of the six types of data collected in step S4 according to a preset detection standard threshold, including the following judgment categories: During the optical parameter determination process, the real-time acquired output power is compared with the rated power allowable range; if it exceeds the range, it is determined to be an abnormal power. The deviation between the center wavelength and the nominal wavelength is compared with the allowable deviation threshold; if the deviation exceeds the limit, it is determined to be an abnormal wavelength drift. The 3 dB spectral linewidth is compared with the upper limit of the linewidth; if it exceeds the limit, it is determined to be an abnormal linewidth. The Raman suppression ratio is compared with the lower limit threshold; if it is lower than the lower limit, it is determined to be an unqualified Raman suppression ratio. The product of the M² factor and the BPP beam parameter is compared with their respective upper limits; if they exceed the limits, it is determined to be an unqualified beam quality.

[0077] During the determination of thermal parameters, the highest temperature of each key temperature measurement area collected by the infrared thermal imager is compared with the corresponding temperature threshold. If any area exceeds the threshold, it is determined to be an over-temperature anomaly. At the same time, the temperature rise rate per unit time is calculated. If the temperature rise rate exceeds the preset upper limit, it is determined to be a temperature rise anomaly.

[0078] During the process of determining light leakage defects, the light spot image collected by the infrared observer is input into the AI ​​image recognition module. When a bright spot on the fiber end face, a light leakage spot due to fiber breakage, or a long light spot due to cladding light stripping failure is detected, and the area or brightness of the light spot exceeds the preset detection standard threshold, it is determined to be an abnormal light leakage.

[0079] In the process of determining the time-domain waveform, the time-domain signal acquired by the oscilloscope is subjected to spectrum analysis and feature extraction. When periodic modulation characteristics of MI modulation instability, reverse pulse characteristics of SBS stimulated Brillouin scattering, pulse amplitude distortion, or repetition frequency shift are detected, the time-domain waveform is determined to be abnormal.

[0080] During the power ramp-up phase, a full parameter determination is performed immediately after each power level acquisition. After all power level ramp-ups are successful, the laser is maintained at 100% rated power and enters the aging test phase. The preset duration of the aging test is set by the model template (e.g., 8 hours or 24 hours). During the aging process, the integrated test software continuously performs the above real-time determination and analyzes the trends of key parameters such as power and temperature. When a continuous performance degradation trend is detected (e.g., slow power decrease, continuous temperature increase), an early warning is issued, but an emergency stop is not immediately triggered. If all indicators meet the preset test standard thresholds throughout the aging test and no abnormalities are triggered, the integrated test software automatically controls the power of the laser under test to drop to 0% and shuts down the laser output after the cumulative aging time reaches the preset value, and then automatically generates a factory test report. The factory test report is output in PDF format and includes: the model and serial number of the laser under test, the test date and operator, the measured values ​​and judgment conclusions of power / wavelength / linewidth / Raman suppression ratio / M² / BPP at each power point during the power ramp-up process, the power fluctuation curve and temperature change curve of each temperature measurement area during the aging stage, the sampling and light leakage judgment results of infrared spot images, the time-domain waveform analysis conclusion, and finally, a comprehensive judgment of "qualified" or "unqualified". The report is automatically stored in the local database.

[0081] Step S6: If any parameter exceeds the preset detection standard threshold during the test, an automatic emergency stop will be triggered immediately, an alarm prompt will pop up, and all original fault data will be stored.

[0082] In this embodiment, throughout the power ramp-up and aging test, the anomaly detection module of the integrated test software continuously monitors all collected data in real time. If any parameter exceeds the preset detection standard threshold loaded in step S2 (including power anomaly, wavelength drift, linewidth exceeding limits, insufficient Raman suppression ratio, unqualified beam quality, device overheating, fiber optic leakage, MI / SBS time-domain waveform anomaly, and insufficient water flow), an automatic emergency stop process is immediately triggered. The automatic emergency stop employs a dual protection mechanism of software judgment and hardware circuitry: the integrated test software first sends an emergency stop command to the control host. Upon receiving the command, the control host immediately drives the built-in hardware emergency stop relay circuit. Since the normally closed contacts of the hardware relay are connected in series in the power supply circuit of the pump drive power supply of the laser under test, the relay directly cuts off the pump drive power supply after activation, causing the laser under test to stop laser output. Simultaneously, the integrated test software sends a software shutdown command to the laser under test through the software emergency stop command module, forming a redundant cutoff.

[0083] The hardware emergency stop relay circuit operates independently of the software system. Even if the host computer experiences software lag or communication interruption, the hardware circuit of the control host can still complete the emergency stop action based on preset hardware trigger signals such as over-temperature and light leakage, ensuring that the high-power laser will not continue to output. Simultaneously with the emergency stop triggering, the comprehensive testing software displays a red alarm window on the host computer interface. The window shows the fault occurrence time, fault type (such as "end cap over-temperature" or "fiber optic splice light leakage"), and a comparison of the measured fault parameter values ​​with the corresponding thresholds, accompanied by audible and visual alarm prompts. Operators can perform on-site troubleshooting based on the fault location indicated in the alarm window. After troubleshooting, clicking the "Reset" button will deactivate the emergency stop. The storage of original fault data is automatically completed by the data storage module of the integrated test software. The original fault data includes: the precise timestamp of the fault occurrence, the fault type and trigger source, the original power meter data within a preset time period before and after the fault occurrence (e.g., 30 seconds before the fault to 5 seconds after the fault), the original spectrum of the spectrometer, the spot image of the beam quality tester, the temperature cloud image sequence of the infrared thermal imager, the video clip of the light leakage spot of the infrared observer, and the original time domain waveform data of the oscilloscope; at the same time, the operating power, liquid cooling flow rate and ambient temperature of the laser under test at the time of the fault are recorded.

[0084] All the above data is packaged and stored in the local database with a unique fault number. Operators can retrieve the data by laser number, fault type, or time range in the "Fault Record" interface of the integrated testing software for defect traceability analysis and process improvement. After emergency stop and data storage, the system remains in emergency stop locked state, and the laser under test cannot be restarted until the operator confirms that the fault has been eliminated and performs a manual reset. After reset, the system returns to the preparation state of step S1, and the laser under test can be remounted for the next test.

[0085] In this embodiment, when the test is started, the model threshold parameters of the laser under test can be loaded into the comprehensive test software of the host computer, and a drive command can be sent to the instrument drive module to control the data acquisition module in the host to start all instruments for real-time data acquisition. During normal testing, the detection instrument layer continuously uploads the measured data, which is forwarded to the host computer through the control host. The anomaly judgment module in the comprehensive test software continuously compares the thresholds of various data, the AI ​​image recognition module analyzes the image in real time, and the data storage report module stores all data into the local memory.

[0086] For example, when the software identifies an anomaly, such as AI identifying light leakage or parameter exceeding limits, the software emergency stop command module can output a software emergency stop command, while simultaneously notifying the data acquisition module to record the fault and driving the hardware emergency stop relay circuit to cut off the power supply to the laser.

[0087] When the comprehensive testing software on the host computer freezes or malfunctions, such as becoming unresponsive, and the hardware side of the testing instrument detects a serious fault, the testing instrument directly outputs a hardware emergency stop signal to the hardware emergency stop relay circuit, independently cutting off the power supply to the laser under test to ensure safety. The laser under test stops outputting laser power upon power failure, triggering an alarm in the comprehensive testing software and displaying the fault type. Simultaneously, it stores a complete set of traceability data for operators to use in resetting and troubleshooting.

[0088] In the embodiments of this application, emergency stop control can be achieved through dual hardware and software protection. The software logic performs refined parameter determination, and an independent hardware emergency stop relay circuit provides a backup, avoiding the risk of protection failure due to software crashes. By separating the data and control flow, and separating the measurement data flow and the emergency stop control circuit, the test data is completely retained while the safety protection is reliably executed. Each emergency stop saves the spectrum, waveform, thermal image, and light spot, which facilitates the location of the root cause of laser failure for fault tracing and analysis.

[0089] The above are merely preferred embodiments of this application and do not limit the scope of the claims. Any equivalent structural or procedural modifications made based on the description and drawings of this application, or direct or indirect applications in other related technical fields, are similarly included within the scope of protection of the claims. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. An automatic testing device for high-power lasers, characterized in that, include: Pneumatic optical test platform, power meter, spectrometer, oscilloscope, beam quality tester, infrared thermal imager, infrared observer, control host and host computer; The power meter, the spectrometer, the oscilloscope, and the beam quality tester are respectively fixedly mounted on the pneumatic optical test platform; The laser under test is mounted on the installation station of the pneumatic optical testing platform; The infrared thermal imager and the infrared observation instrument are fixed above the pneumatic optical testing platform by a suspension bracket; Each testing instrument communicates with the control host through a standardized interface, and the control host communicates with the host computer through a network interface. The lens of the infrared thermal imager is aimed at the key temperature measurement area of ​​the laser under test, and is used to collect the temperature of the key temperature measurement area of ​​the laser under test in real time, and transmit the real-time temperature data to the control host; the key temperature measurement area includes fiber optic splice, fiber optic end cap, optical lens and pump electrical device. The lens of the infrared observer is aimed at the output fiber optic path area of ​​the laser under test, and is used to convert the invisible near-infrared laser output by the laser under test into a visible light spot image, and transmit the image data to the control host. The control host includes a hardware emergency stop relay circuit, which is used to cut off the output to the laser under test in the event of a software or hardware malfunction. The host computer is equipped with integrated testing software, which integrates an instrument driving module and a data acquisition and analysis module. The instrument driving module is used to automatically acquire and store laser power, spectrum, beam quality, device temperature, fiber infrared light intensity, and time-domain waveform data; the data acquisition and analysis module is used to analyze the received temperature data and image data. The comprehensive testing software includes an anomaly detection module, which is configured to output an emergency stop signal to cut off the output of the laser under test when at least one of the following abnormal conditions is detected: abnormal inlet / outlet water temperature / flow rate, overheating of fiber optic splice, overheating of device, fiber optic leakage, modulation instability (MI) / stimulated Brillouin scattering (SBS) optical degradation, or pulse anomaly.

2. The automatic testing equipment as described in claim 1, characterized in that, The infrared thermal imager is an uncooled infrared temperature measurement device, and the anomaly determination module includes a temperature anomaly identification unit. The temperature anomaly identification unit is configured to select key temperature measurement areas in the temperature cloud map acquired by the infrared thermal imager, and display the highest temperature and average temperature rise of the temperature measurement area in real time; when the highest temperature of the temperature measurement area exceeds a preset temperature threshold, it will automatically alarm and trigger an emergency stop.

3. The automatic testing equipment as described in claim 1, characterized in that, The comprehensive testing software also includes an AI image recognition module, which is configured to automatically identify bright spots on the fiber end face, light leakage spots due to fiber breakage, and long strip spots due to cladding light stripping failure in the light spot image after converting the invisible near-infrared laser into a visible light spot image. The response band of the infrared observer is selected from at least one of 915nm, 1064nm, and 1550nm.

4. The automatic testing equipment as described in claim 1, characterized in that, The comprehensive testing software also includes an index analysis module, which is configured to correlate the temperature data of the infrared thermal imager with the light leakage image of the infrared observer according to spatial location; when the same tested part shows abnormal temperature rise and light leakage spot at the same time, it is determined to be a high-risk fault of fiber optic splice failure or fiber optic damage, and the highest priority emergency stop is immediately triggered.

5. The automatic testing equipment as described in claim 1, characterized in that, The emergency stop signal includes a hardware emergency stop relay circuit, which is configured to cut off the pump drive power supply of the laser under test when each monitoring instrument outputs a hardware emergency stop signal.

6. The automatic testing equipment as described in claim 1, characterized in that, The pneumatic optical testing platform uses a honeycomb sandwich stainless steel tabletop, equipped with independent airbag support and an automatic balancing valve. The full-load tilt of the tabletop is less than 0.02°, the natural frequency in the vertical direction is less than 1.6Hz, and the natural frequency in the horizontal direction is less than 2Hz.

7. The automatic testing equipment as described in claim 1, characterized in that, The spectrometer is used to detect the laser's output wavelength, spectral linewidth, and Raman suppression ratio. It uploads the spectral data to the control host in real time, and then transmits it to the host computer via a network interface, so that the integrated testing software can automatically record and judge the data.

8. The automatic testing equipment as described in claim 1, characterized in that, The emergency stop signal includes a software emergency stop signal, and the integrated test software also includes a software emergency stop command module. The software emergency stop command module is configured to issue a software emergency stop signal to cut off the pump drive power supply of the laser under test based on the judgment result of the anomaly judgment module.

9. An automatic testing method for high-power lasers, applied to the automatic testing equipment according to any one of claims 1 to 8, characterized in that, include: Step S1: Mount the laser under test onto the tooling of the pneumatic optical testing platform and connect the liquid cooling pipeline, power supply line and laser output optical path; Step S2: Select the model of the laser to be tested through the comprehensive testing software of the host computer, and load the preset detection standard threshold of the model; Step S3: Start the automatic test through the comprehensive test software, and automatically control the output power of the laser under test to gradually increase; Step S4: During the power ramp-up and aging process, the output power, spectral parameters, beam quality, device temperature, infrared spot and time domain waveform data of the laser under test are collected synchronously and continuously by multiple testing instruments. Step S5: The comprehensive testing software automatically determines whether each collected data meets the preset test standard threshold. If all indicators are normal, the aging test of the preset duration is completed and the factory test report is automatically generated. Step S6: If any data during the test does not meet the preset detection standard threshold, an automatic emergency stop will be triggered immediately, an alarm prompt will pop up, and all original fault data will be stored.

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