Control method, device, equipment and storage medium of fiber laser

Abstract

The present invention provides a control method, device, equipment and storage medium for an optical fiber laser, the method comprising: performing high-sensitivity monitoring processing on the beam transmission path of the internal fusion point region of the optical fiber laser to obtain micro-reflection data; performing multi-angle analysis processing on the characteristic waveform and mode coupling signal in the micro-reflection data according to pre-stored optical reference information to obtain the corresponding abnormal distribution information of the fusion point; performing directional adjustment processing on the local pump energy and thermal management method of the fusion point region according to the abnormal distribution information to obtain local control parameters; and then performing collaborative calibration processing on the overall output power of the optical fiber laser according to the local control parameters to obtain the target beam output. The present invention can more accurately detect and suppress micro-reflections at the fusion point through the coordinated cooperation of the above-mentioned monitoring analysis and directional adjustment, which has a significant effect on the stable output of the beam of a high-power optical fiber laser.

Description

Technical Field

[0001] The present invention relates to the field of equipment control technology, and in particular to a control method, device, equipment and storage medium for a fiber laser. Background Art

[0002] In the research, development, and application of fiber lasers, as the laser output power continues to rise, the energy density and heat load inside the fiber also increase, which places higher demands on the structural design, coupling efficiency, and beam quality of the fiber itself. Traditional fiber lasers usually use simple output power feedback and overall thermal management methods in the lower power range, and only adjust the macro power stability and thermal stability. However, when the laser enters the high-power output stage, the fusion point area of ​​the optical fiber often causes weak but potentially dangerous reflections due to uneven refractive index transition or stress concentration. Such micro-reflections are usually masked by background light, thermal noise, or slight scattering signals of the optical fiber in conventional detection, making it difficult to accurately identify through simple overall power monitoring.

[0003] In the existing technology, power redundancy or uniform power reduction is often used to avoid abnormal instability in response to the reflection and mode coupling problems that may occur at the fiber fusion point. However, this can easily lead to resource waste or overall efficiency reduction in high-power applications. In addition, common optical monitoring methods are mostly based on large-aperture sensors or the detection of overall beam quality, and lack sensitivity and resolution for micro-reflection signals at local fusion points. Once a small local problem occurs in the fusion point area, it is very likely to cause a series of chain problems such as laser beam mode degradation or uneven heat dissipation. In order to more effectively detect and suppress micro-reflections in the fusion point area, and maintain beam quality while maintaining high power output, it is necessary to monitor and analyze the micro-reflection data and mode coupling signals in a targeted manner, and to fine-tune them in combination with local pump energy and thermal management methods.

[0004] However, in high-power laser applications, there are a large number of gain sections, coupling devices, and fusion splices in the optical fiber, and each module experiences varying degrees of thermal and optical stress during operation. Accurately monitoring and controlling the risk of local reflections generated by specific fusion splices without sacrificing global output performance has become a key challenge in the in-depth development of fiber lasers. Summary of the Invention

[0005] The main purpose of the present invention is to solve the technical problem that it is difficult for existing fiber lasers to timely detect and suppress local reflections at the welding point under high power output conditions, which makes the beam mode susceptible to interference and reduces the overall stability of the system;

[0006] A first aspect of the present invention provides a method for controlling a fiber laser, the method comprising:

[0007] Performing high-sensitivity monitoring processing on the beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data, wherein the preset area is the welding point area;

[0008] Performing multi-angle analysis and processing on the characteristic waveform and mode coupling signal in the micro-reflection data according to pre-stored optical reference information to obtain corresponding abnormal distribution information of the welding points;

[0009] According to the abnormal distribution information of the welding points, the local pump energy and thermal management method of the welding point area are directional adjusted to obtain local control parameters;

[0010] According to the local control parameters, the overall output power of the fiber laser is collaboratively calibrated to obtain a target beam output.

[0011] Optionally, in a first implementation of the first aspect of the present invention, performing high-sensitivity monitoring processing on the light beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data includes:

[0012] A multi-channel detection end is configured for the preset area, and optical signals of different wavelengths and different polarization states are synchronously collected and processed by the multi-channel detection end to obtain multi-dimensional optical sampling information for characterizing local scattering changes;

[0013] Performing segmented threshold filtering on background optical noise of the multi-dimensional optical sampling information to obtain a preliminary reflection detection result, wherein the preliminary reflection detection result includes a candidate interval for indicating where a reflection pulse may exist and a corresponding time index;

[0014] Performing time domain comparison processing on the pulse positions of each candidate interval according to the time index in the preliminary reflection detection result to obtain the intensity distribution of the reflection signal;

[0015] According to the intensity distribution of the reflection signal, correlation matching processing is performed on the multi-dimensional optical sampling information, and corresponding effective reflection peak position and amplitude information are screened from the multi-dimensional optical sampling information based on a matching index to obtain micro-reflection data.

[0016] Optionally, in a second implementation of the first aspect of the present invention, performing multi-angle analysis and processing on the characteristic waveform and mode coupling signal in the micro-reflection data according to pre-stored optical reference information to obtain corresponding abnormal distribution information of weld points includes:

[0017] Performing waveform deconstruction processing on the characteristic waveform in the micro-reflection data to obtain continuous spectrum segments and discrete energy peak information;

[0018] performing mode mapping processing on a reference database according to the continuous spectrum fragments and the discrete energy peak information to obtain a suspected sub-mode coupling index;

[0019] performing a joint comparison process on the sub-mode coupling index and the mode coupling signal of the micro-reflection data to obtain a mode interference mark on the local time axis;

[0020] The pre-stored optical reference information is subjected to difference analysis processing according to the pattern interference mark to obtain abnormal distribution information of the welding points.

[0021] Optionally, in a third implementation of the first aspect of the present invention, performing difference analysis on pre-stored optical reference information according to the pattern interference mark to obtain abnormal distribution information of weld points includes:

[0022] performing index reading processing on the spatiotemporal positions of the pattern interference marks to obtain an interference position set for indicating interference moments and interference segment boundaries;

[0023] performing multi-dimensional comparison processing on pre-stored optical reference information according to the interference position set to obtain difference distribution data for representing interference intensity differences;

[0024] Performing anomaly threshold screening processing on the difference distribution data to obtain potential anomalies;

[0025] According to the potential abnormal items, an association mapping process is performed on the spatial coordinates of the welding points in the welding point area to obtain abnormal distribution information of the welding points.

[0026] Optionally, in a fourth implementation of the first aspect of the present invention, the local pump energy and thermal management method in the welding point area are directional-adjusted based on the abnormal distribution information of the welding points to obtain local control parameters, including:

[0027] Positioning the welding point coordinates in the welding point area according to the abnormal distribution information of the welding points to obtain a target welding point set;

[0028] Correcting the local pump energy of the pump source corresponding to the target splice point set to obtain a pump power allocation instruction;

[0029] Couple the pump power allocation instruction with the thermal management method of the welding point area to obtain refined cooling and heat dissipation instructions;

[0030] The pump power allocation instructions are recombined according to the refined cooling and heat dissipation instructions to obtain local control parameters.

[0031] Optionally, in a fifth implementation of the first aspect of the present invention, the correcting the local pump energy of the pump source corresponding to the target splice point set to obtain the pump power allocation instruction includes:

[0032] Performing parameter reading processing on the outputs of each pump source associated with the target splice point set to obtain original pump power data;

[0033] Performing difference calculation on the energy demand of the welding point section according to the original pump power data to obtain a power deviation value;

[0034] Performing a fitting process on the power deviation value and the adjustable remaining pump energy of the pump source to obtain temporary power allocation data;

[0035] A safety threshold verification process is performed on the temporary power allocation data to obtain a pump power allocation instruction.

[0036] Optionally, in a sixth implementation of the first aspect of the present invention, performing collaborative calibration processing on the overall output power of the fiber laser according to the local control parameter to obtain the target beam output includes:

[0037] Performing segmented merging processing on the local control parameters to obtain power adjustment commands involving the multi-stage amplification units inside the fiber laser;

[0038] According to the power adjustment command, matching and scheduling processing is performed on the gain fiber and the related coupler in the fiber laser to obtain multi-channel output power instructions;

[0039] Comparing the multi-channel output power instructions with the real-time power readings output by the terminal monitoring module of the fiber laser to obtain power deviation information;

[0040] The multi-path output power instructions are redistributed according to the power deviation information, and the target beam output of the fiber laser is performed based on the redistributed multi-path output power instructions.

[0041] A second aspect of the present invention provides a control device for a fiber laser, the control device for the fiber laser comprising:

[0042] A high-sensitivity monitoring module is used to perform high-sensitivity monitoring processing on the beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data, wherein the preset area is the welding point area;

[0043] A multi-angle analysis module is used to perform multi-angle analysis on the characteristic waveform and mode coupling signal in the micro-reflection data according to pre-stored optical reference information to obtain corresponding abnormal distribution information of the welding points;

[0044] A directional adjustment module is used to perform directional adjustment processing on the local pump energy and thermal management mode of the welding point area according to the abnormal distribution information of the welding point to obtain local control parameters;

[0045] The collaborative calibration module is used to perform collaborative calibration processing on the overall output power of the fiber laser according to the local control parameters to obtain a target beam output.

[0046] A third aspect of the present invention provides a control device for a fiber laser, comprising: a memory and at least one processor, wherein the memory stores instructions, and the memory and the at least one processor are interconnected via a line; the at least one processor calls the instructions in the memory so that the control device of the fiber laser executes the steps of the above-mentioned control method of the fiber laser.

[0047] A fourth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the steps of the above-mentioned method for controlling a fiber laser.

[0048] The above-mentioned fiber laser control method, device, equipment, and storage medium obtain micro-reflection data by performing high-sensitivity monitoring on the beam transmission path in the weld point region within the fiber laser. The method then performs multi-angle analysis and processing on the characteristic waveform and mode coupling signal in the micro-reflection data based on pre-stored optical reference information to obtain corresponding abnormal distribution information of the weld point. Based on this abnormal distribution information, the method then performs directionally adjusted processing on the local pump energy and thermal management method in the weld point region to obtain local control parameters. The method then performs collaborative calibration processing on the overall output power of the fiber laser based on the local control parameters to obtain the target beam output. Through the coordinated coordination of the above-mentioned monitoring and analysis with the directionally adjusted processing, the present invention can more accurately detect and suppress micro-reflections at the weld point, significantly contributing to the stable output beam of high-power fiber lasers.

[0049] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purposes and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Schematic diagram of a first embodiment of a method for controlling a fiber laser according to an embodiment of the present invention;

[0052] Figure 2 Schematic diagram of an embodiment of a control device for a fiber laser according to an embodiment of the present invention;

[0053] Figure 3 Schematic diagram of an embodiment of a control device for a fiber laser in an embodiment of the present invention. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0055] The terms "including," "having," and any variations thereof, as used in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to the process, method, product, or device.

[0056] To facilitate understanding of this embodiment, a control method for a fiber laser disclosed in an embodiment of the present invention is first introduced in detail. Figure 1 As shown, this method includes the following steps:

[0057] 101. Perform high-sensitivity monitoring processing on the beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data, wherein the preset area is a welding point area;

[0058] In one embodiment of the present invention, the high-sensitivity monitoring processing of the light beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data includes: configuring a multi-channel detection end for the preset area, and synchronously collecting and processing light signals of different wavelengths and different polarization states through the multi-channel detection end to obtain multi-dimensional optical sampling information for characterizing local scattering changes; performing segmented threshold filtering processing on the background optical noise of the multi-dimensional optical sampling information to obtain a preliminary reflection detection result, wherein the preliminary reflection detection result includes candidate intervals for indicating possible existence of reflected pulses and corresponding time indexes; performing time domain comparison processing on the pulse positions of each candidate interval according to the time index in the preliminary reflection detection result to obtain an intensity distribution of the reflected signal; performing correlation matching processing on the multi-dimensional optical sampling information according to the intensity distribution of the reflected signal, and screening out the corresponding effective reflection peak position and amplitude information from the multi-dimensional optical sampling information based on a matching index to obtain micro-reflection data.

[0059] Specifically, when configuring a multi-channel detection end for the preset area and using the detection end to synchronously collect and process optical signals of different wavelengths and different polarization states, it is necessary to set up several splitting devices near the fusion point of the fiber laser to split the main transmission beam into multiple branches according to a predetermined ratio and ensure that the signals of each branch are transmitted independently in space. To obtain more stable multi-channel data, detectors with different response bandwidths can be connected in sequence at the back end of the splitting device so that each detector corresponds to an optical signal of a specific wavelength or polarization state. A high-speed analog-to-digital conversion module can be configured for the output end of each detector, and a unified sampling frequency can be set in the module to reduce the sampling delay difference between different channels at the hardware level. If the fiber laser operates in pulse mode, it is necessary to enable trigger logic in the analog-to-digital conversion module so that all channels start data reading simultaneously under the same pulse trigger signal, and write the sampled data into the cache queue in chronological order so that the multi-channel signals remain aligned on the time axis. To ensure that weak scattering is still captured under high-power operation, an optical isolator or loss plate can be added to the front end of the detector to prevent strong light from burning the detector or causing saturation. Furthermore, if signals with different polarization states are present, a polarization beam splitter must be incorporated into the spectrometer to direct the mutually perpendicular polarization components into their respective detection channels. The multi-channel detector generates high-dimensional raw data during acquisition. The light intensity information for each channel is independent in terms of time, frequency, and polarization. Together, these data constitute multidimensional optical sampling information capable of characterizing local scattering variations.

[0060] Specifically, segmented threshold filtering is performed on the background optical noise of the multidimensional optical sampling information to obtain preliminary reflection detection results. Several continuous segments must first be defined on the sampling time or frequency axis to divide the overall signal into segments within a controllable range. The boundaries of each segment can be set based on existing noise distribution statistics. Specifically, offline calculations are performed on the sampling results of a high-power laser output at low power or no-load conditions to determine the noise level fluctuation range in different segments. Subsequently, threshold parameters are set for each segment, including the average noise amplitude and several standard deviation multiples, to distinguish normal noise from suspicious reflections. During the actual filtering stage, the multidimensional optical sampling information within each segment is compared point by point. If the intensity or amplitude of a sampling point exceeds the threshold range for that segment, a suspected reflection pulse is determined to exist in the range of that point, and its time index is recorded in the detection results. If the threshold is exceeded at several adjacent sampling points, the time indexes of these sampling points can be merged into the same candidate interval to form a more complete suspected reflection segment information. This segmented threshold filtering breaks down the overall sampled data into multiple segments, avoiding over- or under-filtering at a single threshold. It also allows for differentiated filtering based on noise levels in different segments. Ultimately, the initial reflection detection results generate a series of candidate intervals with start and end times and amplitude ranges, along with a time index corresponding to each interval to more specifically identify the location of the suspected pulse.

[0061] Specifically, based on the time index in the preliminary reflection detection results, the pulse positions of each candidate interval are compared in the time domain. To obtain the intensity distribution of the reflected signal, it is necessary to further extract the pulse envelope of the multi-channel sampling data within those candidate intervals and compare the rising edge, peak segment, and falling edge of the pulse point by point. To achieve this, the data management module can retrieve the previously recorded raw samples of each channel and find the specific start and end points of the corresponding interval by matching the time index. When extracting the pulse amplitude, it is usually necessary to perform baseline correction on the pulse envelope in each channel. This means that the mean noise component is subtracted from the original light intensity to avoid noise from pulling up or down when the peak is small. A differential or convolution operation can then be performed to determine the time length between the pulse rising edge and peak position. Combined with the energy integral of the entire region of the pulse peak and falling edge, a higher-resolution description of the pulse intensity is formed. If the fiber laser uses multi-wavelength pumping, the data of the different wavelength channels must be normalized so that the pulse intensity of each channel within the same candidate interval can be compared on a unified basis. Through this time domain comparison processing, the suspicious intervals obtained from the preliminary detection can be refined to a more accurate pulse range, and then the amplitude distribution and waveform shape of the pulses in each interval can be output.

[0062] Specifically, based on the intensity distribution of the reflected signal, a correlation matching process is performed on the multidimensional optical sampling information. The corresponding valid reflection peak position and amplitude information are then filtered from the multidimensional optical sampling information based on a matching index. When obtaining micro-reflection data, the numerical correlation between the extracted time-domain pulse envelope and the original multi-channel sampling is combined to determine whether it is a true reflection peak. In actual implementation, a three-dimensional correlation comparison is often performed between the pulse peak and the original data, including time, wavelength, and polarization axes. If a sampling segment substantially matches the pulse morphology in all three dimensions, it is determined to be a "valid reflection peak," and the specific time index and amplitude value of its peak are recorded. If there are significant deviations in any of the dimensions, the sampling segment is excluded to prevent noise spikes from being mistakenly identified as reflection peaks. The correlation matching algorithm generally uses a point-by-point accumulation approach. Specifically, within the same time window, the numerical product or difference between the reflected signal and the original sampling is accumulated and compared with a pre-set matching threshold. If the accumulated result exceeds the threshold, the valid reflection peak information is output. The peak position and amplitude information can be sorted according to amplitude, and peaks with too low amplitude or too short duration can be marked as noise peaks, thereby retaining the most influential micro-reflection features under high power conditions in the final micro-reflection data.

[0063] 102. Perform multi-angle analysis and processing on characteristic waveforms and mode coupling signals in the micro-reflection data according to pre-stored optical reference information to obtain corresponding abnormal distribution information of welding points;

[0064] In one embodiment of the present invention, the multi-angle analysis and processing of the characteristic waveform and the mode coupling signal in the micro-reflection data according to the pre-stored optical reference information to obtain the corresponding abnormal distribution information of the welding point includes: performing waveform deconstruction processing on the characteristic waveform in the micro-reflection data to obtain continuous spectral segments and discrete energy peak information; performing mode mapping processing on the reference database according to the continuous spectral segments and discrete energy peak information to obtain a suspicious sub-mode coupling index; performing joint comparison processing on the sub-mode coupling index and the mode coupling signal of the micro-reflection data to obtain a mode interference mark on the local time axis; and performing difference analysis processing on the pre-stored optical reference information according to the mode interference mark to obtain the abnormal distribution information of the welding point.

[0065] Specifically, waveform deconstruction of the characteristic waveform in the micro-reflection data to obtain continuous spectral segments and discrete energy peak information requires first extracting time series and spectral segments associated with the fiber splice from the micro-reflection data, and then performing multi-level segmentation of the waveform within the deconstruction algorithm. To implement this process, an analysis method relying on short-time Fourier transform or wavelet transform can be implemented in the signal processing unit. The reflection data is locally windowed on both the time and frequency axes to extract the spectral components at each instant. Subsequently, the extracted waveform is smoothed and interpolated to distinguish the continuous bandwidth portion from the pulse peak portion, forming a preliminary delineation of continuous spectral segments and discrete energy peaks. The smoothed waveform is then transferred to a threshold determination module to identify high-amplitude regions exceeding the background baseline within a specific frequency band. Curve fitting is then performed on these regions to determine the peak center position and corresponding energy. The output continuous spectral segments can be archived in a dedicated data index to subsequently determine the degree of fiber mode change by comparing bandwidth characteristics. Discrete energy peak information can be written into a peak list containing the peak's timestamp, amplitude, and neighboring spectral range. Through this processing method, the characteristic waveform is finely decomposed into spectral segments for pattern analysis and energy peaks for amplitude analysis, achieving a multi-dimensional description of the local scattering of the welding point.

[0066] Furthermore, the difference analysis processing is performed on the pre-stored optical reference information according to the pattern interference mark to obtain the abnormal distribution information of the welding point, including: index reading processing is performed on the time and space position of the pattern interference mark to obtain an interference position set for indicating the interference moment and the boundary of the interference segment; multi-dimensional comparison processing is performed on the pre-stored optical reference information according to the interference position set to obtain difference distribution data for representing the interference intensity difference; abnormal threshold screening processing is performed on the difference distribution data to obtain potential abnormal items; and association mapping processing is performed on the welding point spatial coordinates of the welding point area according to the potential abnormal items to obtain the abnormal distribution information of the welding point.

[0067] Specifically, based on the continuous spectral segments and discrete energy peak information, a mode mapping process is performed on the reference database. When obtaining a suspected submode coupling index, each continuous spectral segment and discrete energy peak is compared with the standard mode characteristics in the reference database in terms of wavelength, power distribution, and coherence properties. The mode mapping process pre-stores common fundamental and submode distribution diagrams for different fiber types in the database module, as well as characteristic parameters such as bandwidth expansion and peak shift that may occur under various typical coupling configurations. During the calculation process, the algorithm assigns a matching weight to each reference item based on spectral similarity and peak statistical characteristics. When the matching weight for a segment or peak exceeds a set threshold in key dimensions, a "suspected submode coupling" notification is sent to the output terminal, and a corresponding submode coupling index is generated as a target for subsequent processing. If the same spectral segment shows high similarity to a specific submode coupling mode in the database across multiple features, further refined matching is performed to determine which mode coupling configuration the segment most closely resembles. Discrete peak information is also included in this comparison to check whether multiple reflection peaks correspond to a single submode mode. The final mapping process outputs an index list containing the spatiotemporal locations of suspected submode couplings and their matching scores.

[0068] Specifically, the submode coupling index and the mode coupling signal from the microreflection data are jointly compared to generate a mode interference signature on the local time axis. The coupling type indicated in the submode coupling index must be matched one-to-one with the mode coupling signal recorded in the microreflection data, and their peak phase and amplitude variations must be aligned on the time axis. To accomplish this, the mode analysis module first reads the specific coupling form and its occurrence interval from the submode coupling index. The microreflection data then retrieves the coupling signal features collected within the same time period or frequency band. If the two match in characteristic amplitude and phase offset, and their occurrence times overlap or are continuously distributed, significant mode interference is determined in that region. The peak moment of interference is then determined through interpolation or curve fitting. Once generated, the interference signature is accompanied by a label indicating the mode interference coupling type and intensity level, providing a visual representation of the interference level during recording. The interference signature also includes a local time axis number, which indicates the time period or pulse index where the interference is concentrated, thereby distinguishing whether the interference exhibits periodicity during multiple pulse repetitions. Through such joint comparison, a one-to-one mapping relationship is formed between the mode coupling index and the micro-reflection data, enabling the interference mark to be focused on the most representative sub-mode coupling time zone.

[0069] Specifically, a differential analysis is performed on pre-stored optical reference information based on the pattern interference markers. To obtain abnormal splice distribution information, the algorithm compares the specific splice locations indicated by the interference markers with the normal pattern distribution of the same splice in the optical reference information. This differential analysis typically uses the nominal pattern distribution map and historical data in the optical reference information as a benchmark. The algorithm assesses the severity and distribution of the splice anomaly by calculating the deviation of the current interference marker in dimensions such as spectral width, energy attenuation, and polarization state distribution. If the area covered by the interference markers significantly deviates from the normal transmission pattern in the reference information, the algorithm identifies this area as an abnormal splice region and adds the coordinates and interference intensity parameters of the abnormal region to the output record. To improve the accuracy of the anomaly distribution, the differential analysis is spatially expanded to include several sampling segments near the splice to eliminate occasional errors arising from a single point. The resulting abnormal splice distribution information is output as a table or graph, containing the coherence level of the pattern interference, optical loss indicators, and the corresponding splice coordinate index.

[0070] 103. Based on the abnormal distribution information of the welding points, the local pump energy and thermal management method of the welding point area are directional adjusted to obtain local control parameters;

[0071] In one embodiment of the present invention, the local pump energy and thermal management method of the welding point area are directed adjusted according to the abnormal distribution information of the welding points to obtain local control parameters, including: positioning the welding point coordinates of the welding point area according to the abnormal distribution information of the welding points to obtain a target welding point set; correcting the local pump energy of the pump source corresponding to the target welding point set to obtain a pump power allocation instruction; coupling and adjusting the pump power allocation instruction with the thermal management method of the welding point area to obtain a refined cooling and heat dissipation instruction; and recombining the pump power allocation instruction according to the refined cooling and heat dissipation instruction to obtain local control parameters.

[0072] Specifically, the fusion point coordinates of the fusion point area are located and processed according to the fusion point abnormal distribution information. When the target fusion point set is obtained, it is necessary to retrieve the fusion point abnormal distribution information in the data management module and make a one-to-one correspondence with the known optical fiber space coordinate index. In order to complete this process, it is necessary to first establish a set of coordinate mapping tables covering the specific positions of each fusion point in the system. The mapping table is often obtained through precise measurement or factory calibration during laser assembly and is associated with the number of each fusion point in the storage unit. When the fusion point abnormal distribution information indicates that mode interference or scattering anomalies are detected within a certain coordinate range, the algorithm will locate the corresponding fusion point number in the mapping table according to the range, and merge a group of abnormal points with a higher concentration in the coordinate area as output. If reflection anomalies occur between adjacent coordinate nodes, an adjacency analysis will be performed, and these closely adjacent fusion points will be regarded as a higher priority abnormal segment, and the segment number will be indicated when outputting. This positioning process often uses fiber path geometry and recorded gain profile data to correlate coordinate spans with anomaly amplitudes, ultimately forming an indexed list of target splice points. This list contains the absolute spatial coordinates of each splice point, its corresponding anomaly index, and the necessary reference spectral information. This coordinate positioning process allows the system to precisely target the area most susceptible to reflection interference, as reported in the splice anomaly distribution information, avoiding indiscriminate subsequent adjustments across the entire fiber. The upstream and downstream coordinates of the splice point are retained in the indexed list to account for the impact of beam direction on heat accumulation at the splice point during energy correction and thermal management design. Once the target splice point set is generated, the data management module passes it to the next-level pump energy correction unit.

[0073] Specifically, the local pump energy of the pump sources corresponding to the target splice set is corrected. To obtain the pump power allocation instructions, the control unit needs to obtain the available output range and current operating status of each pump source. This process can be based on a stored device parameter table that identifies each pump source's maximum output power, minimum safe power, and applicable wavelength range. After locating the target splice set, the control software retrieves the pump channels connected to or affected by these splices and sets the output of the corresponding channels to a pending correction state. This correction process redistributes the pump energy using linear or nonlinear equations based on the magnitude of the anomaly distribution information and the configured optical power reference values ​​for each pump source. If a splice exhibits high reflection interference, the algorithm reduces the output power of the associated pump sources in that area or, in a multi-wavelength pumping environment, shifts some of the energy to other wavelength channels less sensitive to the splice. If further refined control is required, a safety margin factor can be added to the original power allocation to prevent excessive local reductions from causing overall system output instability. After completing the parameter calculations, the control software writes the resulting pump power allocation instructions. These instructions contain the output power, modulation mode, and spectral channel selection for each pump source at the target splice point, along with the necessary timing synchronization information. These instructions are then sent to the hardware driver module, which adjusts the pump source current or laser diode drive voltage accordingly, ensuring the precise localized pump energy received by the target splice section.

[0074] Specifically, coupling the pump power allocation instructions with the thermal management method for the splice region to obtain refined cooling and heat dissipation instructions requires the control layer to simultaneously retrieve the aforementioned pump power allocation information and the internal fiber heat dissipation configuration parameters. When a fiber laser operates at high power, more heat accumulates at the splice, and this heat is often unevenly distributed around the fiber, easily leading to localized overheating. To prevent splice damage or refractive index distortion caused by localized overheating, the pump power correction results must be integrated with the cooling subsystem status within the thermal management module. To implement this process, the algorithm predicts the heat load at the corresponding splice based on the specific output level of the pump power allocation instructions and allocates appropriate cooling channels and air or water flow rates within the cooling subsystem. If certain splices have high anomaly indexes, the thermal management module assigns them a higher cooling priority. The thermal management module reduces the temperature of the splice region by increasing the coolant flow rate or using additional thermoelectric coolers, thereby preventing further microreflections caused by thermal stress. This coupled adjustment process can also modify the estimated heat distribution based on the absorption attenuation coefficient of each wavelength in the case of multi-wavelength pumping, making the cooling channel allocation more targeted. After generating refined cooling and heat dissipation instructions, the control unit will issue them to the cabinet cooling or external circulation cooling module. The instructions include the cooling flow rate, temperature control set point, and expected temperature range for each key welding point.

[0075] Specifically, the pump power allocation instructions are recombined based on the refined cooling and heat dissipation instructions. When local control parameters are derived, the actual available cooling capacity reported by the cooling subsystem is combined with the previous pump power allocation under the same scheduling logic for recalibration. This process is typically performed by a central controller, which balances real-time temperature data from a set of temperature sensors with pump power targets. This ensures that if the predetermined cooling flow rate is insufficient to suppress all high-power sections, partial pump output can be fine-tuned or delayed to prevent heat accumulation. The recombining process examines the difference between the actual cooling capacity currently achieved at each target splice and the corrected pump allocation value. If local cooling redundancy is significantly insufficient at a particular location, the pump source power is reduced a second time or injected into the target splice during relatively idle periods at other splices in the same band to maintain overall beam output quality. The final output local control parameter file includes the terminal output power of each pump channel, the corresponding modulation waveform, and the temperature safety range settings for the key splice. This file is sent to the driver and executed in parallel with the cooling system, ensuring that the pumping and cooling operations can form a mutually coordinated operating mode in both time and space.

[0076] Furthermore, the correcting processing of the local pump energy of the pump source corresponding to the target splice set to obtain the pump power allocation instruction includes: performing parameter reading processing on the output of each pump source associated with the target splice set to obtain original pump power data; performing difference calculation processing on the energy demand of the splice section according to the original pump power data to obtain a power deviation value; fitting the power deviation value with the adjustable remaining pump energy of the pump source to obtain temporary power allocation data; and performing safety threshold verification processing on the temporary power allocation data to obtain the pump power allocation instruction.

[0077] Specifically, when the parameters of the pump source outputs associated with the target splice set are read and processed to obtain the original pump power data, it is necessary to pre-record key parameters such as the current output power, maximum available power, and corresponding operating wavelength range of each pump source in the control unit. This process first obtains the real-time values ​​of the operating current, output optical power, and modulation duty cycle of the relevant pump sources one by one through the communication interface with the pump driver, and then writes these values ​​into a temporary buffer area and makes a mapping relationship according to the coordinates or number of the target splice point. Since there are often multiple parallel pump sources in the same laser system, it is necessary to synchronize the data of each channel with the timestamp to ensure that the time base can be unified when calculating the energy difference later. After the parameters of all pump sources are read, a comprehensive data table containing output power, available margin, and wavelength attributes will be formed in the system memory, so that the actual working status of each pump source can be accurately identified in the next difference calculation.

[0078] Specifically, the energy requirements of the splice segment are calculated based on the raw pump power data. To determine the power deviation, the previously generated set of target splices is compared with the pump power data. For each splice, the algorithm infers the current required correction power based on the splice anomaly distribution information—the ideal pump level that should be maintained at that splice without anomalous reflections. This ideal level can be determined by historical experimental data, optimal coupling efficiency recorded in a reference database, or a safe operating range. The system then checks the raw pump power data to determine whether the current pump output for that splice is too high or too low, and subtracts the two to determine the power deviation. If a splice detects significant reflection anomalies, the required correction power is reduced to mitigate heat accumulation and enhanced scattering caused by localized excess energy. After calculating the power deviation for each splice, the algorithm tabulates the deviation results in coordinate or number order. The table contains the difference data for each target splice and all associated pump sources, and records the required reduction or increase when a set threshold is exceeded.

[0079] Specifically, the power deviation value is fitted with the remaining adjustable pump energy of the pump source. When obtaining the temporary power allocation data, it is necessary to comprehensively consider the remaining output capacity of each pump source and the energy demand gap of the welding point. This step is implemented based on multi-objective optimization or linear programming ideas, treating all power deviation values ​​as constraints to be met or reduced, treating the remaining adjustable power space of each pump source as resources to be allocated, and performing fitting operations on the two. Specifically, the power deviation of each welding point can be sorted first, and priority can be given to welding points with more serious reflection anomalies or larger demand fluctuations, and then the remaining power margin can be gradually matched for other welding points. If the adjustable power of a certain pump source is insufficient to meet the needs of multiple welding points, it will be allocated item by item according to the predetermined priority, and the remaining adjustable power of the pump source will be updated after the allocation is completed. Through a cyclic iteration approach, the system can integrate the output correction value of each welding point and its corresponding pump source after numerical convergence to generate temporary power distribution data. The data records the final output level and modulation mode of each pump source, and classifies and saves this information in a communicative instruction format.

[0080] Specifically, the temporary power allocation data undergoes a safety threshold verification process. When generating a pump power allocation instruction, the control software must confirm that the allocation results for all pump sources do not exceed the system hardware limits or the safe operating range before issuing a final correction instruction. During this verification process, the control software first checks whether each pump source exceeds its maximum allowable output power or minimum safe output power, and adjusts any values ​​that exceed the range back to a feasible range. Subsequently, by matching the real-time temperature readings from the sensor with the system's preset safety temperature limit, the algorithm verifies whether excessive power will lead to insufficient heat dissipation at certain splice points. If the risk is too high, the algorithm further reduces the output of the pump source until it meets safety limits. In multi-wavelength pumping environments, it is also necessary to ensure that gain competition due to energy concentration does not occur at a single wavelength. Therefore, the control software compares the actual injected power of each wavelength with the corresponding absorption characteristics of the fiber. If the output of a single wavelength is excessive, the temporary allocation data is rebalanced. After all verifications are completed, the remaining temporary allocation data that meets the safety threshold and has completed wavelength balancing is officially upgraded to a pump power allocation instruction. The instruction is formatted into a set of executable commands and sent to the pump source driver. The driver adjusts the current or oscillator parameters according to the command to make the output power and wavelength distribution reach the verified distribution level, thus forming a pump power distribution scheme that can operate safely in the high-power fiber laser system.

[0081] 104. According to the local control parameters, the overall output power of the fiber laser is collaboratively calibrated to obtain the target beam output.

[0082] In one embodiment of the present invention, the overall output power of the fiber laser is collaboratively calibrated according to the local control parameters to obtain the target beam output, including: performing segmented merging processing on the local control parameters to obtain power adjustment commands involving the multi-stage amplification unit inside the fiber laser; performing matching scheduling processing on the gain fiber and related couplers in the fiber laser according to the power adjustment command to obtain multi-path output power instructions; comparing the multi-path output power instructions with the real-time power readings output by the terminal monitoring module of the fiber laser to obtain power deviation information; and redistributing the multi-path output power instructions according to the power deviation information, and performing target beam output of the fiber laser based on the redistributed multi-path output power instructions.

[0083] Specifically, the control system first receives a set of discrete and independent control information from the segmented merging of the local control parameters to generate power adjustment commands for the fiber laser's multi-stage amplifier units. This information typically comes from a previously integrated analysis of micro-reflections at the splice, pump energy distribution, and thermal management strategies. To effectively integrate this information into executable power adjustment commands, the control software partitions the local control parameters according to the order of the fiber laser's multi-stage amplifier units. Each partition typically corresponds to one or more amplifier stages or pump source modules. During the partitioning process, physically related parameters are grouped together, taking into account the gain characteristics and coupler positions of each amplifier unit, to ensure that local control parameters within the same amplifier stage can be calibrated together. The control software then merges the control instructions from each partition along dimensions such as time or frequency. During the merging process, the control software checks whether the power targets of adjacent segments are mutually exclusive or exceed each other. If the output requirements of adjacent segments for the same amplifier stage deviate significantly, the algorithm establishes a segmented transition zone to reconcile the two to a compatible level through numerical interpolation or linear transition. If different pump wavelengths or pulse timings exist within a multi-channel parallel amplifier structure, the merging process also requires recording the wavelength or timing correspondence to prevent overlapping commands within the same amplifier unit. Once all segments have been merged, the system generates a set of association tables in memory, showing the target power values ​​for each amplifier stage at different times or wavelengths. This association table is then written into the data structure of the power adjustment command. This command typically uses a centralized format that can be uniformly parsed across multiple amplifier stages.

[0084] Specifically, according to the power adjustment command, the gain fibers and associated couplers within the fiber laser are matched and scheduled. When generating multi-channel output power instructions, the hardware execution layer must ensure that each amplifier stage or each pump source can read the appropriate command fragment. This operation first retrieves the power adjustment command output from the previous step in the management software and assigns appropriate operating parameters to each amplifier stage based on the gain fiber position and coupler number indicated therein. At this point, the control program loads a specific gain coefficient or target amplification factor to each gain fiber according to the fiber laser topology and sets the coupling ratio at the coupler to ensure that beams of different wavelengths or different pulses can flow through each gain segment. If a coupler is used to combine multiple pump energies into the same gain fiber, the timing or duty cycle of each energy channel must be clearly specified during scheduling to avoid internal friction or excessive coupling during coupling, which can cause nonlinear effects. After the scheduling module generates the execution list, it calls the driver interface to issue instructions to each amplifier unit and coupler. The instructions contain the specific amplification gain, coupling ratio, and corresponding safety parameter settings. Execution timing is typically aligned with the system clock to ensure that each unit completes parameter loading within the same laser operating cycle. In multi-wavelength lasers, matching scheduling prioritizes the gain of different wavelengths based on power adjustment commands and sets the splitting ratio at the coupler level so that the energy of each wavelength is injected into the gain fiber in the specified proportion.

[0085] Specifically, when comparing the multi-channel output power commands with the real-time power readings output by the fiber laser's terminal monitoring module to obtain power deviation information, an online detection function is enabled within the system monitoring process. This function uses a high-precision power meter or beam quality monitor installed at the output end to obtain the actual output power. The monitoring module transmits the measured power readings to the control host during each operating cycle or trigger moment. The host compares the commanded power with the measured power against the previously generated multi-channel output power commands. If the difference exceeds a certain range, it indicates that the amplifier stage or coupler in that channel is not accurately performing to the specified target, or that the gain fiber is experiencing attenuation fluctuations under high thermal load. To more clearly identify the problem, the control program generates a power matching evaluation index for each output power command, comparing the command with the measured power point by point. After completing the difference analysis for all channels, the system sorts the differences by size and records them in a power deviation information list. Each deviation information item corresponds to the specific channel number, the current time, and the deviation magnitude. If a deviation persists or increases further, an early warning message will be triggered, indicating that the channel needs to redistribute energy or check the actual working status of the gain fiber and coupler. Power deviation information is also combined with data from other sensors such as temperature and current to determine whether there is local overheating or electrical anomalies within the fiber laser. In this way, under high-power output conditions, the execution effect of multiple instructions can be guaranteed through real-time comparison and deviation information can be generated.

[0086] Specifically, based on the power deviation information, the multi-channel output power instructions are redistributed. When the fiber laser's target beam is output based on the redistributed multi-channel output power instructions, the control system dynamically fine-tunes each channel with deviations, prioritizing corrections for larger deviations. At the algorithmic level, the redistribution process combines the power deviation information with the power adjustment command from the previous step and determines whether each channel has unused adjustable resources or a reserved safety margin. If a channel's output is too high, resulting in a positive deviation, the system reduces that channel's power quota during redistribution and transfers it to other channels with surplus or in-demand power. If the output is too low, resulting in a negative deviation, energy is added to that channel if available in other channels, achieving dynamic balance between channels. After redistribution, a new multi-channel output power instruction is generated and sent to the amplifier unit and coupler for implementation during the next laser operation cycle. At the hardware execution level, each pump source or coupler control unit verifies that the new instruction does not exceed hardware limits or heat dissipation capabilities through numerical comparison, and then immediately updates the corresponding current, modulation, and coupling ratio parameters. This allows the fiber laser to perform closed-loop adjustments based on real-time monitoring data while operating at high power, ensuring optimal output power distribution and achieving a more stable and higher-quality target beam output. This redistribution mechanism can be continuously applied over multiple pulse cycles or in continuous operation until the power deviation across all channels falls within a reasonable range, achieving dynamic stability over time.

[0087] In this embodiment, micro-reflection data is obtained by performing high-sensitivity monitoring on the beam propagation path in the weld region of a fiber laser. The characteristic waveforms and mode coupling signals in the micro-reflection data are analyzed from multiple angles based on pre-stored optical reference information to obtain corresponding abnormal distribution information of the weld region. Based on this abnormal distribution information, the local pump energy and thermal management method in the weld region are directionally adjusted to obtain local control parameters. The overall output power of the fiber laser is then collaboratively calibrated based on these local control parameters to obtain the target beam output. Through the coordinated combination of monitoring and analysis and directional adjustment, the present invention can more accurately detect and suppress micro-reflections at the weld region, significantly enhancing the stable output beam of high-power fiber lasers.

[0088] The above describes the control method of the fiber laser in the embodiment of the present invention. The following describes the control device of the fiber laser in the embodiment of the present invention. Figure 2 In one embodiment of the present invention, a control device for a fiber laser includes:

[0089] The high-sensitivity monitoring module 201 is used to perform high-sensitivity monitoring processing on the beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data, wherein the preset area is the welding point area;

[0090] The multi-angle analysis module 202 is used to perform multi-angle analysis on the characteristic waveform and mode coupling signal in the micro-reflection data according to pre-stored optical reference information to obtain corresponding abnormal distribution information of the welding points;

[0091] A directional adjustment module 203 is configured to perform directional adjustment processing on the local pump energy and thermal management mode in the welding point area according to the abnormal distribution information of the welding point to obtain local control parameters;

[0092] The collaborative calibration module 204 is configured to perform collaborative calibration processing on the overall output power of the fiber laser according to the local control parameters to obtain a target beam output.

[0093] In an embodiment of the present invention, the control device of the fiber laser executes the control method of the fiber laser described above. The control device of the fiber laser obtains micro-reflection data by performing high-sensitivity monitoring on the beam transmission path in the internal fusion point region of the fiber laser; performs multi-angle analysis and processing on the characteristic waveform and mode coupling signal in the micro-reflection data based on pre-stored optical reference information to obtain corresponding abnormal distribution information of the fusion point; performs directionally adjusted processing on the local pump energy and thermal management method in the fusion point region based on the abnormal distribution information to obtain local control parameters; and then performs coordinated calibration processing on the overall output power of the fiber laser based on the local control parameters to obtain the target beam output. Through the coordinated cooperation of the above-mentioned monitoring and analysis and directionally adjusted processing, the present invention can more accurately detect and suppress micro-reflections at the fusion point, which has a significant effect on the stable output beam of high-power fiber lasers.

[0094] above Figure 2 The control device of the fiber laser in the embodiment of the present invention is described in detail from the perspective of modular functional entities. The control device of the fiber laser in the embodiment of the present invention is described in detail from the perspective of hardware processing.

[0095] Figure 3is a schematic structural diagram of a fiber laser control device provided by an embodiment of the present invention. The fiber laser control device 300 may vary significantly due to different configurations or performances, and may include one or more processors (central processing units, CPUs) 310 (e.g., one or more processors) and a memory 320, and one or more storage media 330 (e.g., one or more mass storage devices) storing application programs 333 or data 332. The memory 320 and storage medium 330 may be either short-term or permanent storage. The program stored in the storage medium 330 may include one or more modules (not shown), each of which may include a series of instruction operations in the fiber laser control device 300. Furthermore, the processor 310 may be configured to communicate with the storage medium 330, and execute the series of instruction operations in the storage medium 330 on the fiber laser control device 300 to implement the steps of the above-mentioned fiber laser control method.

[0096] The fiber laser control device 300 may further include one or more power supplies 340, one or more wired or wireless network interfaces 350, one or more input and output interfaces 360, and / or one or more operating systems 331, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. It will be understood by those skilled in the art that Figure 3 The structure of the fiber laser control device shown does not limit the fiber laser control device provided by the present invention, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0097] The present invention also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. The computer-readable storage medium stores instructions, which, when executed on a computer, cause the computer to execute the steps of the fiber laser control method.

[0098] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0099] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0100] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling a fiber laser, characterized in that: The control method of the fiber laser comprises: Performing high-sensitivity monitoring processing on the beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data, wherein the preset area is a welding point area; Performing multi-angle analysis and processing on the characteristic waveform and mode coupling signal in the micro-reflection data according to the pre-stored optical reference information to obtain corresponding abnormal distribution information of the welding point; According to the abnormal distribution information of the welding points, the local pump energy and thermal management method of the welding point area are directional adjusted to obtain local control parameters; According to the local control parameters, the overall output power of the fiber laser is collaboratively calibrated to obtain a target beam output.

2. The control method of the optical fiber laser according to claim 1, characterized in that: The high-sensitivity monitoring process of the light beam transmission path of the preset area inside the fiber laser to obtain micro-reflection data includes: A multi-channel detection end is configured for the preset area, and optical signals of different wavelengths and different polarization states are synchronously collected and processed by the multi-channel detection end to obtain multi-dimensional optical sampling information for characterizing local scattering changes; Performing segmented threshold filtering on the background optical noise of the multi-dimensional optical sampling information to obtain a preliminary reflection detection result, wherein the preliminary reflection detection result includes a candidate interval for indicating that a reflection pulse may exist and a corresponding time index; Performing time domain comparison processing on the pulse position of each candidate interval according to the time index in the preliminary reflection detection result to obtain the intensity distribution of the reflection signal; According to the intensity distribution of the reflection signal, correlation matching processing is performed on the multi-dimensional optical sampling information, and corresponding effective reflection peak position and amplitude information are screened out from the multi-dimensional optical sampling information based on a matching index to obtain micro-reflection data.

3. The control method of the optical fiber laser according to claim 1, characterized in that: The multi-angle analysis and processing of the characteristic waveform and the mode coupling signal in the micro-reflection data according to the pre-stored optical reference information to obtain the corresponding abnormal distribution information of the welding point includes: Performing waveform deconstruction processing on the characteristic waveform in the micro-reflection data to obtain continuous spectrum fragments and discrete energy peak information; According to the continuous spectrum fragments and the discrete energy peak information, a mode mapping process is performed on a reference database to obtain a suspected sub-mode coupling index; Performing joint comparison processing on the sub-mode coupling index and the mode coupling signal of the micro-reflection data to obtain a mode interference mark on the local time axis; The pre-stored optical reference information is subjected to difference analysis processing according to the pattern interference mark to obtain abnormal distribution information of the welding points.

4. The control method of the optical fiber laser according to claim 3, characterized in that: The performing difference analysis processing on the pre-stored optical reference information according to the pattern interference mark to obtain the abnormal distribution information of the welding points includes: Performing index reading processing on the temporal and spatial positions of the pattern interference marks to obtain an interference position set for indicating interference moments and interference section boundaries; Performing multi-dimensional comparison processing on pre-stored optical reference information according to the interference position set to obtain difference distribution data for representing the difference in interference intensity; Performing anomaly threshold screening processing on the difference distribution data to obtain potential anomalies; According to the potential abnormal items, the spatial coordinates of the welding points in the welding point area are subjected to association mapping processing to obtain abnormal distribution information of the welding points.

5. The control method of the optical fiber laser according to claim 1, characterized in that: According to the abnormal distribution information of the welding points, the local pump energy and thermal management method of the welding point area are directional adjusted to obtain the local control parameters including: Positioning the welding point coordinates in the welding point area according to the abnormal distribution information of the welding points to obtain a target welding point set; Correcting the local pump energy of the pump source corresponding to the target welding point set to obtain a pump power allocation instruction; The pump power allocation instruction is coupled and adjusted with the thermal management method of the welding point area to obtain refined cooling and heat dissipation instructions; The pump power allocation instructions are recombined according to the refined cooling and heat dissipation instructions to obtain local control parameters.

6. The control method of the optical fiber laser according to claim 5, characterized in that: The correcting the local pump energy of the pump source corresponding to the target welding point set to obtain the pump power allocation instruction includes: Performing parameter reading processing on each pump source output associated with the target welding point set to obtain original pump power data; Performing difference calculation processing on the energy demand of the welding point section according to the original pump power data to obtain a power deviation value; Performing fitting processing on the power deviation value and the adjustable remaining pump energy of the pump source to obtain temporary power allocation data; A safety threshold verification process is performed on the temporary power allocation data to obtain a pump power allocation instruction.

7. The control method of the optical fiber laser according to claim 1, characterized in that: The step of performing collaborative calibration on the overall output power of the fiber laser according to the local control parameters to obtain the target beam output comprises: The local control parameters are merged in sections to obtain power adjustment commands involving the multi-stage amplification units inside the fiber laser; According to the power adjustment command, matching and scheduling processing is performed on the gain fiber and the related coupler in the fiber laser to obtain multi-channel output power instructions; Comparing the multi-channel output power instructions with the real-time power readings output by the terminal monitoring module of the optical fiber laser to obtain power deviation information; The multi-path output power instructions are redistributed according to the power deviation information, and the target beam output of the optical fiber laser is performed based on the redistributed multi-path output power instructions.

8. A control device for a fiber laser, characterized in that: The control device of the optical fiber laser comprises: A high-sensitivity monitoring module is used to perform high-sensitivity monitoring processing on the light beam transmission path of a preset area inside the fiber laser to obtain micro-reflection data, wherein the preset area is a welding point area; A multi-angle analysis module, used to perform multi-angle analysis and processing on the characteristic waveform and mode coupling signal in the micro-reflection data according to pre-stored optical reference information, so as to obtain corresponding abnormal distribution information of welding points; A directional adjustment module, used to perform directional adjustment processing on the local pump energy and thermal management method of the welding point area according to the abnormal distribution information of the welding point, so as to obtain local control parameters; The collaborative calibration module is used to perform collaborative calibration processing on the overall output power of the fiber laser according to the local control parameters to obtain a target beam output.

9. A control device for a fiber laser, characterized in that: The control device of the optical fiber laser comprises: a memory and at least one processor, wherein instructions are stored in the memory; The at least one processor calls the instructions in the memory to enable the control device of the fiber laser to perform the steps of the control method of the fiber laser according to any one of claims 1 to 7.

10. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by the processor, the steps of the method for controlling a fiber laser according to any one of claims 1 to 7 are implemented.

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