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CN-122000771-A - Multi-optical-path collaborative operation laser integrating power adjustment

CN122000771ACN 122000771 ACN122000771 ACN 122000771ACN-122000771-A

Abstract

The invention discloses a laser integrating power adjustment and multi-optical-path collaborative operation, and relates to the technical field of lasers. The integrated power-adjusted multi-light-path collaborative operation laser comprises a composite light source generating module, a power dynamic adjusting module, a multi-wavelength laser generating module, a collaborative strategy generating module and an operation feedback adjusting and controlling module, wherein the composite light source generating module is used for generating a laser seed source and dividing the laser seed source into basic light paths with different energy levels, the power dynamic adjusting module is used for adjusting sub-beam power and outputting sub-beams with stable power, the multi-wavelength laser generating module is used for generating multi-path laser beams through a second harmonic effect, the collaborative strategy generating module is used for generating an optimal strategy of multi-light-path collaborative operation, and the operation feedback adjusting and controlling module is used for acquiring operation data in an operation task to obtain a state evaluation value and optimizing the state evaluation value in a grading mode, so that the problems of manual adjustment of space-time parameters, large errors, low efficiency, large power fluctuation caused by a thermal effect and frequent shutdown and calibration in the prior art are solved.

Inventors

  • CAI HUAAN
  • XU DONG

Assignees

  • 山东精准智能医疗器械有限公司

Dates

Publication Date
20260508
Application Date
20260129

Claims (10)

  1. 1. A laser for integrated power conditioning multi-optical path collaborative operation, comprising the steps of: the composite light source generation module is used for acquiring initial laser parameters, generating a laser seed source and dividing the laser seed source into basic light paths with different energy levels; The power dynamic adjusting module is used for adjusting the power of the sub-beams based on the acquired temperature gradient, and outputting sub-beams with stable power based on the adjusted sub-beams and combining with a dynamic compensation light path; The multi-wavelength laser generation module is used for generating multiple paths of laser beams through a second harmonic effect based on sub beams with stable power; The collaborative strategy generation module is used for generating an optimal strategy of multi-optical-path collaborative operation based on the multi-path laser beams; The operation feedback regulation and control module is used for executing operation tasks based on an optimal strategy of multi-optical-path collaborative operation, acquiring operation data in the operation tasks, obtaining a state evaluation value and performing hierarchical optimization.
  2. 2. The integrated power-adjusted multi-optical-path collaborative operation laser according to claim 1, wherein the composite light source generation module includes a parameter acquisition unit, a laser seed source generation unit, an optical path splitting and energy grading unit, a multi-wavelength laser generation unit, wherein: the parameter acquisition unit is used for acquiring initial laser parameters; the laser seed source generation unit is used for generating a laser seed source based on the initial laser parameters; The optical path dividing and energy grading unit is used for dividing a single laser seed source into multiple paths of sub-beams and distributing different energy levels to obtain multiple paths of basic optical paths.
  3. 3. The integrated power conditioning multi-path collaborative laser of claim 2, wherein generating a laser seed source based on initial laser parameters is performed by: the initial laser parameters comprise initial wavelength, initial spectrum width, initial pulse width, repetition frequency, initial pulse average power and initial pulse peak power; adjusting an initial wavelength of the laser to a target value stored in a data store in combination with a wavelength tuner based on the initial laser parameters; Controlling the duration and frequency of the laser pulses in a data store based on the initial pulse width and repetition frequency in combination with a pulse width controller; and adjusting the initial power of the seed source based on the initial pulse average power and the initial pulse peak power by combining an electric control attenuator, and outputting the laser seed source.
  4. 4. The integrated power conditioning multi-path collaborative laser of claim 2, wherein a single laser seed source is split into multiple sub-beams and distributed at different energy levels to create multiple fundamental paths, the process is as follows: Based on the obtained initial wavelength, comparing the initial wavelength with the reference wavelength stored in the data storage library, wherein the energy distribution ratio corresponding to the nearest reference wavelength is the energy distribution ratio corresponding to the initial wavelength; dividing energy levels into levels with corresponding numbers based on the ratio of each proportion in the energy distribution proportion obtained by matching; Based on the optical fiber coupler, the laser seed source is divided into multiple paths of sub-beams according to the corresponding energy distribution proportion by combining the energy distribution proportion obtained by matching, and the corresponding energy levels are distributed for each sub-beam by combining the corresponding number of energy levels, namely each basic light path.
  5. 5. The integrated power conditioning multi-path collaborative laser of claim 1 wherein sub-beam power is conditioned by: based on the historical temperature gradient and the corresponding historical power adjustment value stored in the data storage library, a mapping set of the temperature gradient and the power adjustment value is established, and the corresponding power adjustment value is obtained by combining the currently obtained temperature gradient; Based on the electric control attenuator, the corresponding power adjustment value is combined, the light path shielding proportion is changed through mechanical displacement, and the power of the sub-beams is adjusted.
  6. 6. The integrated power conditioning multi-path collaborative laser according to claim 1 outputting stabilized power beamlets in the following manner: Acquiring the power, temperature gradient, aberration data and optical fiber length of the adjusted sub-beams, wherein the aberration data comprise a wavefront error root mean square value, a beam divergence angle change value and a focusing light spot size change value; comparing the power with a power threshold range stored in a data storage library, and if the power falls within the power threshold range, not triggering a compensation flow; If the power does not fall within the power threshold range, triggering a compensation flow, and comparing the power with the reference power stored in the data storage library, wherein the power compensation scheme corresponding to the nearest reference power is the power compensation scheme corresponding to the current power; comparing the temperature gradient and the aberration data with a temperature gradient threshold value and a parameter threshold value corresponding to the aberration data stored in a data storage library, and triggering a compensation flow if the temperature gradient is larger than the temperature gradient threshold value and parameters larger than the parameter threshold value corresponding to the aberration data exist in the aberration data; if the temperature gradient is not greater than the temperature gradient threshold value and the aberration data has parameters greater than the parameter threshold value corresponding to the aberration data, triggering a compensation flow; If the temperature gradient is not greater than the temperature gradient threshold value and the aberration data does not have parameters greater than the parameter threshold value corresponding to the aberration data, the compensation flow is not triggered; If the compensation flow is triggered, the parameters in the temperature gradient and the aberration data are the matching data, the matching data are compared with the reference matching data stored in the data storage library, and the thermal lens effect compensation scheme corresponding to the closest reference matching data is the thermal lens effect compensation scheme corresponding to the matching data; Establishing a mapping set of the temperature gradient and the optical fiber length change value based on the historical temperature gradient data and the historical optical fiber length change value, and combining the currently obtained temperature gradient to obtain a corresponding optical fiber length change value, shortening the corresponding optical fiber length change value and counteracting the optical path difference; Obtaining compensated power, temperature gradient and wavefront error root mean square value, dividing the absolute value of the difference between the current power and the set target power by the set target power to obtain power error, and performing difference between the current temperature gradient and the initial temperature gradient to obtain the residual temperature gradient; if one of the power error, the temperature gradient residual quantity and the root mean square difference value is larger than a corresponding set threshold value stored in the data storage library, repeating the compensation flow, otherwise, maintaining the current compensation state, entering a low-power detection mode, and outputting the sub-beams with stable power after compensation.
  7. 7. The integrated power conditioning multi-path collaborative laser according to claim 1, wherein generating multiple beams via second harmonic effects is performed as follows: based on the sub-beams with each stable power, combining a second harmonic effect, and converting the sub-beams with each stable power into laser beams with corresponding target wavelengths; the laser beams with different target wavelengths are coupled to the same output optical fiber based on a multichannel wavelength division multiplexer in the optical fiber combiner.
  8. 8. The integrated power conditioning multi-path collaborative laser of claim 1, wherein generating an optimal strategy for multi-path collaborative operation is performed by: Acquiring laser beam state parameters, laser beam space parameters, laser beam time parameters and operation task parameters; dividing an operation task area into a plurality of subareas based on operation task parameters and combining a K-means algorithm, matching each subarea with one path of laser beam, sequencing the subareas from large to small according to processing time length, and preferentially processing the subareas with large sizes during processing; Establishing a collaborative optimization model based on the laser beam space parameter and the laser beam time parameter to obtain a multi-light path collaborative scheme; the laser beam space parameters comprise light spot position deviation, divergence angle and focusing position error, and the laser beam time parameters comprise pulse synchronization error, processing time sequence delay and equipment response time; establishing a mapping set of the laser beam space parameter, the laser beam time parameter and the space-time performance index based on the historical laser beam space parameter, the historical laser beam time parameter and the historical space-time performance index, and combining the currently obtained laser beam space parameter and the currently obtained laser beam time parameter to obtain a corresponding space-time performance index; the space-time performance index comprises an inter-beam deviation value, a beam pulse triggering time sequence synchronization error value and a processing path curvature radius; Defining an objective function based on the space-time performance index; determining constraint conditions, wherein the constraint conditions comprise space constraint, time constraint and path constraint; The space constraint is that the inter-beam deviation value is not more than the maximum allowable deviation; Time constraint, wherein the specific constraint content is that the light beam pulse triggering time sequence synchronization error value is not larger than the maximum allowable error; The path constraint is specifically defined as that the curvature radius of the processing path is not smaller than a minimum allowable value; and determining a minimum objective function based on a particle swarm optimization algorithm, wherein an optimal solution comprises an optimal beam position, an optimal trigger time sequence and an optimal scanning speed, and is recorded as a multi-optical-path cooperative scheme, namely an optimal strategy for multi-optical-path cooperative operation.
  9. 9. The integrated power conditioning multi-path collaborative laser according to claim 8, wherein the minimization objective function is determined based on a particle swarm optimization algorithm by the following: S1, coding decision variables, such as inter-beam deviation values, beam pulse triggering time sequence synchronization error values and processing path curvature radius, into particle dimensions in a particle swarm; s2, randomly generating N particles, wherein each particle represents a group of parameter combinations; s3, constructing a fitness function, and evaluating the performance of each individual, namely an objective function value; s4, each particle records a parameter combination corresponding to the historical optimal fitness of the particle, and all particles share the parameter combination corresponding to the global optimal fitness; s5, adjusting the moving direction and speed of the particles according to the individual optimum and the global optimum of each particle; And S6, repeating the steps S4-S5 until the maximum iteration times, stopping calculating and outputting a current optimal solution, wherein the current optimal solution is the multi-light path collaborative scheme.
  10. 10. The integrated power conditioning multi-path collaborative laser according to claim 1, wherein status assessment values are obtained and hierarchically optimized as follows: the operational data includes light-to-light conversion efficiency, heat dissipation rate, wavefront distortion root mean square value, penetration fluctuation, power stability indicator, component temperature, vibration amplitude, space-time synchronization error value, and power distribution error value. Weighting and summing all parameters in the operation data to obtain a state evaluation value; Comparing the state evaluation value with a reference evaluation threshold range stored in a data storage library to obtain a state evaluation level, wherein the state evaluation level comprises a first stage, a second stage and a third stage; if the state evaluation value falls within the range of the reference evaluation threshold value, the state evaluation result is a second level, and early warning is prompted; If the state evaluation value does not fall into the reference evaluation threshold range and is larger than the maximum value of the reference evaluation threshold range, the state evaluation result is three-level, and normal is prompted; If the state evaluation value does not fall into the reference evaluation threshold range and is smaller than the minimum value of the reference evaluation threshold range, the state evaluation result is a first level, and a fault is prompted; Based on the state evaluation level, comparing the state evaluation level with the state reference level stored in the data storage library, wherein the optimization scheme corresponding to the same state reference level is the optimization scheme corresponding to the state evaluation level.

Description

Multi-optical-path collaborative operation laser integrating power adjustment Technical Field The invention relates to the technical field of lasers, in particular to a laser integrating power adjustment and multi-optical-path collaborative operation. Background A laser is a device for generating and amplifying coherent light based on the principle of stimulated radiation, and its core components include a working substance (such as solid, gas, semiconductor, etc.) that provides energy level transitions of particles, a pump source (light energy or electric energy excitation) that achieves population inversion, and an optical resonant cavity (for optical signal feedback and amplification) formed by a reflecting mirror. The output light has high monochromaticity and direction. In the application field of laser technology, a laser with multi-optical-path collaborative operation provides a new technical path for scenes such as material processing, optical detection and the like by integrating energy and spatial distribution of multiple beams of laser. The existing laser mainly relies on the combination of optical elements to be matched with an electric control system, the independent laser is combined with a beam combiner to realize multi-wavelength output, and a hardware trigger circuit is used for realizing pulse time sequence cooperative control. Along with the expansion of application scenes, the technology has higher requirements on the performance of the laser, such as the micro-nano processing needs the position deviation between light beams to be controlled at a micron level, the pulse synchronization error reaches a nanosecond level, the high-power continuous processing needs to restrain the power fluctuation and the light beam quality degradation caused by temperature, the multi-material processing needs to rapidly switch or output laser with multiple wavelengths and dynamically match energy, and the laser is promoted to develop towards the high-precision cooperative control, the multi-physical parameter dynamic compensation and the integrated design direction. However, the prior art has the problems of manual debugging of space-time parameters, large error, low efficiency, large power fluctuation caused by thermal effect and frequent shutdown calibration. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a laser integrating power adjustment and multi-optical-path collaborative operation, which solves the problems of large error, low efficiency, large power fluctuation caused by thermal effect and frequent shutdown calibration in the existing manual debugging of space-time parameters. The multi-optical-path collaborative operation laser with integrated power adjustment comprises a composite light source generation module, a power dynamic adjustment module, a multi-wavelength laser generation module, an operation feedback regulation module and an operation feedback regulation module, wherein the composite light source generation module is used for acquiring initial laser parameters, generating a laser seed source and dividing the laser seed source into basic optical paths with different energy levels, the power dynamic adjustment module is used for adjusting sub-beam power based on acquired temperature gradients, combining dynamic compensation optical paths based on the adjusted sub-beams and outputting sub-beams with stable power, the multi-wavelength laser generation module is used for generating multi-path laser beams based on the sub-beams with stable power through a second harmonic effect, the collaborative strategy generation module is used for generating an optimal strategy for multi-optical-path collaborative operation based on the multi-path laser beams, and the operation feedback regulation module is used for executing operation tasks based on the optimal strategy for executing the multi-optical-path collaborative operation tasks, acquiring operation data in the operation tasks, obtaining state evaluation values and performing hierarchical optimization. The composite light source generation module comprises a parameter acquisition unit, a laser seed source generation unit, a light path segmentation and energy grading unit and a multi-wavelength laser generation unit, wherein the parameter acquisition unit is used for acquiring initial laser parameters, the laser seed source generation unit is used for generating a laser seed source based on the initial laser parameters, and the light path segmentation and energy grading unit is used for segmenting a single laser seed source into multiple paths of sub-beams and distributing different energy levels to obtain multiple paths of basic light paths. Further, a laser seed source is generated based on initial laser parameters including an initial wavelength, an initial spectral width, an initial pulse width, a repetition frequency, an initial pulse average power, an initial pulse peak power, adjusting the initial w