Laser quality optimization method and system, terminal equipment and storage medium

Abstract

The invention relates to the technical field of laser, in particular to a laser quality optimization method, which comprises the following steps of: setting parameters of a seed source laser, and debugging each stage of amplification in an amplifier according to preset target output parameters of a laser system; acquiring a pulse parameter and a laser system parameter corresponding to the compressed shortest pulse width; adjusting the parameters of the seed source laser, and then repeating the amplification and compression processes to obtain pulse parameters of the shortest pulse width corresponding to a plurality of different seed source laser parameters and laser system parameters corresponding to the shortest pulse width; determining an optimal pulse compression result and a laser system parameter corresponding to the optimal pulse compression result; and on the basis of the laser system parameters corresponding to the optimal pulse compression result, optimizing actual parameters in the laser system to obtain optimized laser pulses. According to the invention, during laser adjustment, the influence of laser parameters of the seed source can be considered, so that the adjustment is more flexible, the adjustment effect is better, and high-quality laser pulses are easier to obtain.

Description

Technical Field

[0001] The present application relates to the field of laser control technology, and in particular to a laser quality optimization method, system, terminal device and storage medium. Background Art

[0002] In industrial application scenarios, the pulse width and pulse quality of ultrafast lasers (usually characterized by the Strehl Ratio, which is the ratio of the energy contained in the main peak of the pulse to the total pulse energy. The closer it is to 1, the better the pulse quality). The pulse optimization solutions used by current femtosecond pulse CPA (Chirped Pulse Amplification) lasers usually use shorter fiber links and larger mode field diameters, stretchers with larger broadening rates and adjustable parameters, and nonlinear amplification technology. These methods usually focus on improving the CPA system structure and parameter design, but the adjustment effect is general and the efficiency is low. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a laser quality optimization method, system, terminal device and storage medium, which can effectively solve the problem of general adjustment effect.

[0004] In a first aspect, an embodiment of the present application provides a laser quality optimization method, comprising:

[0005] Set the seed source laser parameters and debug each level of amplification inside the amplifier according to the preset target output parameters of the laser system;

[0006] Continuously adjusting the compressor to compress the amplified laser pulse, and obtaining pulse parameters and laser system parameters corresponding to the shortest pulse width after compression;

[0007] Adjust the seed source laser parameters, then repeatedly debug each level of amplification inside the amplifier, and continuously adjust the compressor to compress the amplified laser pulse, obtain the pulse parameters and laser system parameters corresponding to the shortest pulse width after compression, and obtain the pulse parameters of the shortest pulse width corresponding to multiple different seed source laser parameters and the laser system parameters corresponding to the shortest pulse width;

[0008] Based on the pulse parameters of the shortest pulse width corresponding to the parameters of multiple different seed source lasers, determine the optimal pulse compression result and the laser system parameters corresponding to the optimal pulse compression result;

[0009] Based on the laser system parameters corresponding to the optimal pulse compression result, the actual parameters in the laser system are optimized so that the laser system outputs optimized laser pulses.

[0010] In some embodiments, the step of continuously adjusting the compressor to compress the amplified laser pulse and obtaining pulse parameters and laser system parameters corresponding to the shortest pulse width after compression includes:

[0011] Comparing the pulse width values ​​of all compressed laser pulses obtained by adjusting the compressor, and determining the laser pulse with the shortest pulse width value;

[0012] Based on the laser pulse with the shortest pulse width, the seed source laser parameters, amplifier parameters and compressor parameters in the current laser system are obtained.

[0013] In some embodiments, the step of adjusting the seed source laser parameters includes:

[0014] The intracavity net dispersion in the seed source laser is adjusted by adjusting the grating pair spacing of the seed source laser or adjusting the fiber parameters.

[0015] In some embodiments, the step of adjusting the grating pair spacing of the seed source laser or adjusting the optical fiber parameters includes:

[0016] According to the preset adjustment parameters, set the grating pair spacing or fiber parameters in sequence until all adjustment parameters are set.

[0017] In some embodiments, the step of determining the optimal pulse compression result and the laser system parameters corresponding to the optimal pulse compression result based on the pulse parameters of the shortest pulse width corresponding to a plurality of different seed source laser parameters includes:

[0018] For laser pulses with the shortest pulse width corresponding to multiple different seed source laser parameters, the Strehl ratio values ​​are calculated respectively;

[0019] The laser pulse corresponding to the largest Strehl ratio value is selected as the optimal pulse compression result.

[0020] In some embodiments, the step of optimizing actual parameters in the laser system based on the laser system parameters corresponding to the optimal pulse compression result so that the laser system outputs optimized laser pulses includes:

[0021] The actual parameters in the laser system are set to the laser system parameters corresponding to the optimal pulse compression results.

[0022] In a second aspect, the present application further provides a laser system comprising: a control terminal, a laser seed source, a stretcher, an amplifier and a compressor;

[0023] The laser seed source, the stretcher, the amplifier and the compressor are connected in sequence;

[0024] The laser seed source is used to emit seed laser;

[0025] The amplifier is used to amplify the laser pulse after being stretched by the stretcher;

[0026] The compressor is used to compress the amplified laser pulse and then output the laser pulse;

[0027] The control terminal is used to execute the laser quality optimization method to control the laser seed source, the stretcher, the amplifier and the compressor to optimize the output laser pulse.

[0028] In a third aspect, the present application also provides a terminal device, the terminal device includes a processor and a memory, the memory stores a computer program, and the processor is used to execute the computer program to implement the laser quality optimization method.

[0029] In a fourth aspect, the present application also provides a computer-readable storage medium storing a computer program, which implements a laser quality optimization method when the computer program is executed on a processor.

[0030] The embodiments of the present application have the following beneficial effects:

[0031] The laser quality optimization method of the present application optimizes the output pulse compression result by adjusting the seed source laser parameters in addition to adjusting the amplifier and the compressor, thereby obtaining an optimized laser output, thereby providing more means for optimizing the laser and a wider and more flexible adjustment range. For actual usage scenarios, it is also easier to optimize the output laser, and the laser output that meets the requirements can be obtained more quickly, thereby improving the efficiency of laser output optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a laser system according to an embodiment of the present application is shown;

[0034] Figure 2 A schematic diagram of a laser quality optimization method according to an embodiment of the present application is shown;

[0035] Figure 3 A laser pulse simulation diagram of an embodiment of the present application is shown;

[0036] Figure 4 A laser pulse spectrum diagram of an embodiment of the present application is shown;

[0037] Figure 5 A laser pulse autocorrelation curve diagram of an embodiment of the present application is shown;

[0038] Figure 6 An optimized laser pulse spectrum diagram of an embodiment of the present application is shown;

[0039] Figure 7 An optimized laser pulse autocorrelation curve and a fitting curve diagram are shown in an embodiment of the present application;

[0040] Figure 8 A schematic structural diagram of a laser quality optimization device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0043] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. Terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0045] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] The current pulse optimization scheme is limited to the improvement of CPA system structure and parameter design, and does not take into account the influence of the initial laser pulse output by the seed source itself. The present application provides a laser quality optimization method. In addition to adjusting the amplifier and compressor, the neutron source laser parameters are also adjusted to achieve the effect of optimizing the output laser, making the optimization result more obvious and effective.

[0047] A laser system in which the laser quality optimization method is implemented is described below in conjunction with some specific embodiments.

[0048] Figure 1 A structural diagram of a laser system according to an embodiment of the present application is shown. Exemplarily, the laser system includes: a control terminal 100 , a laser seed source 200 , a stretcher 300 , an amplifier 400 and a compressor 500 .

[0049] like Figure 1 As shown, the laser seed source 200, the stretcher 300, the amplifier 400 and the compressor 500 are connected in sequence. Taking the 1um band GHz fundamental frequency fiber femtosecond laser system as an example, the seed source laser emitted by the laser seed source 200 is stretched to several hundred picoseconds or even nanoseconds by the stretcher 300, and then input into the amplifier 400 for power amplification, and finally compressed to femtoseconds by the compressor 500 for output.

[0050] The laser seed source 200 is a seed source laser, which is used to provide an initial optical signal and is mainly used to output stable high repetition rate femtosecond mode-locked laser pulses.

[0051] The stretcher 300 is mainly used to stretch the femtosecond pulse output by the seed source to the picosecond or even nanosecond level. The stretcher introduces dispersion into the pulse to stretch it in the time domain, thereby greatly reducing the peak power of the pulse to avoid optical damage in the subsequent amplification process and reduce nonlinear effects.

[0052] The control terminal 100 is used to control the laser seed source 200, the stretcher 300, the amplifier 400 and the compressor 500 to perform corresponding debugging and laser output through a control program, so as to debug the laser quality output by the laser system.

[0053] The control terminal 100 may be a control device integrated in the laser system, or may be an external device such as a computer.

[0054] Specifically, the laser is output according to the target output parameters of the laser. The laser pulses are obtained by debugging each level of amplification inside the amplifier 400 and adjusting the compressor 500.

[0055] Then adjust the seed source laser parameters to make the laser seed source 200 emit different lasers, and then adjust the amplifier and the compressor. After multiple rounds of adjustment, multiple output laser parameters are obtained, and the laser parameters with the best quality are obtained as the adjustment result. The seed source laser parameters corresponding to the adjustment result, the adjustment parameters of the amplifier 400, and the adjustment result of the compressor 500 are the final adjustment result of the laser system.

[0056] Figure 2 A schematic flow chart of a laser quality optimization method according to an embodiment of the present application is shown. Exemplarily, the method of this embodiment is applied to a laser system as described above. The method includes:

[0057] Step S100, setting the seed source laser parameters, and debugging each level of amplification inside the amplifier according to the preset target output parameters of the laser system.

[0058] The target output parameters are used to define various indicators of the laser to be output, including output power, pulse frequency, pulse energy, etc.

[0059] First, the seed source laser parameters of the laser seed source are set to make the seed source laser emit laser, and then the various stages of amplification in the amplifier are adjusted to control the parameters of the output laser. In this way, the output laser parameters are adjusted based on the seed source laser parameters. For example, the output laser pulse power can be made the same as the target output parameter power by debugging the various stages of amplification.

[0060] Step S200, continuously adjusting the compressor to compress the amplified laser pulse, and obtaining pulse parameters and laser system parameters corresponding to the shortest pulse width after compression.

[0061] The output pulse parameters can be obtained through measuring equipment such as an autocorrelator or FROG (frequency resolved optical switch), and these parameters can be the time domain shape of the pulse and analyze its contrast, pulse width parameters, etc.

[0062] Figure 3 The figure shows the pulse autocorrelation curve L1 and the Gaussian fitting result L2 measured by the autocorrelator. There is a large deviation between the base of the autocorrelation curve and the fitting curve. Generally speaking, the larger the deviation, the wider the base, or the higher the sidelobe amplitude, the worse the pulse quality.

[0063] Therefore, by continuously adjusting the compressor, multiple pulse parameters can be obtained, and then multiple output pulse parameters are compared to determine the pulse with the shortest pulse width, thereby determining the laser system parameters corresponding to the pulse with the shortest pulse width. The laser system parameters are the seed source laser parameters, compressor parameters, and parameters of each level of amplification when emitting the pulse with the shortest pulse width. The laser system parameters are the laser system parameters that can obtain the shortest pulse width after adjusting the compressor under the current conditions, and can be considered as the optimal parameters under the current conditions.

[0064] In one embodiment, the adjustment parameter of the compressor may be the grating spacing of the compressor. Each time the grating spacing of the compressor is adjusted, pulse data is recorded once, thereby obtaining multiple pulse data, and then the output pulse parameter with the smallest pulse width in each pulse data is compared. The pulse corresponding to the pulse parameter is the shortest pulse, and the corresponding grating spacing is the adjustment spacing corresponding to the compressor.

[0065] In this way, a pulse with the shortest pulse width under the current seed source laser parameters can be obtained, which can be considered as the laser pulse with the best quality under the current seed source laser parameters.

[0066] Step S300, adjust the seed source laser parameters, then repeatedly debug the various levels of amplification inside the amplifier, and continuously adjust the compressor to compress the amplified laser pulse, obtain the pulse parameters and laser system parameters corresponding to the shortest pulse width after compression, and obtain the pulse parameters of the shortest pulse width corresponding to multiple different seed source laser parameters and the laser system parameters corresponding to the shortest pulse width.

[0067] After the above steps of debugging, only one pulse is debugged under one seed source laser parameter, but the seed source laser parameters can also be involved in the optimization adjustment. By adjusting the seed source laser parameters, a better quality laser pulse output can be obtained.

[0068] Therefore, in this embodiment, the seed source laser parameters are also adjusted, and then by repeating the operations of steps S100 to S200, multiple pulses with the shortest pulse width under new seed source laser parameters can be obtained, as well as pulse parameters of the shortest pulse width corresponding to different seed source laser parameters and laser system parameters corresponding to the shortest pulse width.

[0069] It can be understood that when the seed source laser parameters are repeatedly adjusted, they still need to be adjusted according to the aforementioned target output parameters. Figure 3 From the relevant description, it can be seen that the purpose of adjusting the seed source laser parameters is to reduce Figure 3The base width in the signal can be adjusted, so the parameters that can affect this performance can be adjusted. The optimization is still based on the preset output target parameters, so the output power should remain consistent, and the remaining parameters can be adjusted according to the specific adjustment strategy.

[0070] Exemplarily, the seed laser parameter that is adjusted may be the cavity net dispersion of the seed laser.

[0071] The seed source laser can achieve femtosecond pulse output with different optical parameters. The net dispersion of the cavity is the total dispersion experienced by the laser pulse in the laser resonant cavity after one cycle, which is the sum of the positive dispersion provided by the optical fiber and all optical element media and the negative dispersion provided by the grating pair.

[0072] By adjusting the net dispersion of the cavity, femtosecond laser output with different spectra and pulse widths can be achieved. For example, as the net dispersion gradually increases, the sideband spacing in the mode-locked laser spectrum increases and the amplitude decreases. When the net dispersion approaches zero, the evolution of the pulse in the cavity becomes a broadening-compression type, and the spectrum becomes wider and no longer has sidebands.

[0073] In one embodiment, the net dispersion of the cavity in the seed source laser can be adjusted by adjusting the grating pair spacing of the seed source laser or adjusting the fiber parameters. The specific method of adjusting the net dispersion of the cavity in the seed source laser can be adjusted by different schemes according to the structure and design of the seed source laser.

[0074] For example, for a resonant cavity that uses a diffraction grating to provide negative dispersion, the net dispersion of the cavity can be adjusted by adjusting the spacing between the grating pairs. When the spacing between the grating pairs is increased, the net dispersion of the cavity will decrease, and when the spacing between the grating pairs is reduced, the net dispersion of the cavity will increase.

[0075] For all-fiber mode-locked resonators, chirped fiber gratings are usually used to provide dispersion compensation. The net dispersion can be adjusted by adjusting the fiber length to increase or decrease the total amount of material dispersion. The same adjustment goal can also be achieved by adding a dispersion element outside the resonant cavity to perform additional dispersion management on the seed laser.

[0076] Step S400, based on pulse parameters of the shortest pulse width corresponding to a plurality of different seed source laser parameters, determine an optimal pulse compression result and laser system parameters corresponding to the optimal pulse compression result.

[0077] After obtaining the pulse parameters of the shortest pulse width corresponding to multiple different seed source laser parameters and the laser system parameters corresponding to the shortest pulse width, the next step is to select the laser with the best quality as the optimal pulse compression result based on the pulse parameters from these data, and then use the laser system parameters corresponding to the laser with the optimal pulse compression result as the final target parameters that need to be adjusted.

[0078] The quality of the output laser pulse can be evaluated by calculating the corresponding Strehl ratio. The higher the quality of the laser pulse, the larger the Strehl ratio. Figure 3 The performance is that the narrower the bottom pointed by the arrow, the closer the blue line fits the red line curve, which means the laser quality is higher.

[0079] In this embodiment, the Strehl ratio is used to characterize the time domain pulse quality, that is, the proportion of the energy contained in the main peak mentioned above in the total pulse energy. In this way, the quality of the pulse can be judged.

[0080] like Figure 4 and Figure 5 As shown, in order to better understand the adjustment effect of this embodiment, the seed laser with obvious Kelly sidebands in the spectrum is taken as an example. After amplification in the CPA system, the output spectrum shows an obvious double-peak structure. After the pulse is stretched in a stretcher with large second-order dispersion, its time domain shape basically corresponds to the shape of the spectrum. Therefore, the stretched pulse also has a double-peak structure in the time domain; when the peak power is high and SPM (non-linear effect) occurs, the nonlinear phase shift generated is more complex than that of a pulse with only a single rising edge and falling edge, and it is more difficult to compensate by adjusting the compressor. The amplified output laser pulse is compressed to obtain a pulse with multiple obvious side lobes, and the peak power is significantly reduced.

[0081] By adjusting the seed source grating spacing multiple times, the half-height width of the spectrum can be increased and the sideband can be significantly weakened. The output spectrum of the seed light after amplification in the CPA system is as follows: Figure 6 As shown in the figure, it is a relatively regular single-peak shape. The amplitude of the depression and protrusion on the curve is relatively small. The irregularity of the nonlinear phase shift generated by the broadened pulse during the amplification process is reduced, and the compressibility of the pulse after amplification is significantly improved. The autocorrelation curve of the compressed output pulse is shown in Figure 7 As shown in the figure, the base / side lobe is basically eliminated, the autocorrelation curve is basically consistent with the fitting curve, the pulse width is shorter, and the pulse quality is very good. It can be understood that Figure 7 The autocorrelation curve and fitting curve shown are only for the purpose of visually reflecting the quality change of the laser pulse. In actual scenarios, the quality of the laser pulse still needs to be evaluated by calculating the Strehl ratio.

[0082] By evaluating multiple pulse compression results through the Strehl ratio, the best pulse compression result can be obtained.

[0083] Among them, because the larger the Strehl ratio, the better the pulse compression effect, therefore, for the shortest pulses corresponding to multiple different seed source laser parameters, the laser pulse corresponding to the largest Strehl ratio value is selected as the optimal pulse compression result.

[0084] Step S500: based on the laser system parameters corresponding to the optimal pulse compression result, optimizing the actual parameters in the laser system so that the laser system outputs optimized laser pulses.

[0085] Based on the optimal pulse compression result obtained above, the laser seed source parameters, amplifier amplification parameters at various levels, and compressor compression parameters corresponding to the laser pulse result can be obtained. Therefore, the laser system parameters corresponding to the optimal pulse compression result are the optimized laser system parameters. The actual parameters in the laser system are optimized using the optimized laser system parameters. By working according to these laser seed source parameters, amplifier amplification parameters at various levels, and compressor compression parameters, the laser system can emit laser pulses of sufficiently high quality that meet the target output parameters. In this way, the optimization operation is completed.

[0086] The laser quality optimization method of this embodiment, in addition to adjusting the parameters of the amplifier and the compressor, also adjusts the parameters of the seed source laser, changes the cavity net dispersion of the seed source laser, and changes the output laser quality. The method of the embodiment can be adapted to the existing adjustment method, and provides more adjustment directions, and is adapted to a variety of laser systems, has good compatibility, and has a wider adjustment range than the existing technology, and is easier to adjust to produce high-quality laser output that meets the requirements.

[0087] like Figure 8 As shown, this embodiment also provides a laser quality optimization method and device, including:

[0088] The amplifier adjustment module 10 is used to set the seed source laser parameters and debug each level of amplification inside the amplifier according to the preset target output parameters of the laser system.

[0089] The compressor adjustment module 20 is used to continuously adjust the compressor to compress the amplified laser pulse, and obtain pulse parameters and laser system parameters corresponding to the shortest pulse width after compression.

[0090] The seed source adjustment module 30 is used to adjust the seed source laser parameters, and then repeatedly debug the various levels of amplification inside the amplifier, and continuously adjust the compressor to compress the amplified laser pulse, obtain the pulse parameters and laser system parameters corresponding to the shortest pulse width after compression, and obtain the pulse parameters of the shortest pulse width corresponding to multiple different seed source laser parameters and the laser system parameters corresponding to the shortest pulse width.

[0091] The information determination module 40 is used to determine the optimal pulse compression result and the laser system parameters corresponding to the optimal pulse compression result based on the pulse parameters of the shortest pulse width corresponding to multiple different seed source laser parameters.

[0092] The optimization module 50 is used to optimize the actual parameters in the laser system based on the laser system parameters corresponding to the optimal pulse compression result so that the laser system outputs optimized laser pulses.

[0093] The present application also provides a terminal device, which includes a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement a laser quality optimization method.

[0094] The terminal device may be a computer or a computer terminal that can control the laser system. The terminal may be a device integrated with the laser system or an independent external terminal device.

[0095] The present application also provides a computer-readable storage medium storing a computer program, which implements a laser quality optimization method when the computer program is executed on a processor.

[0096] It can be understood that the device of this embodiment corresponds to the method of the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described repeatedly here.

[0097] Among them, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including a central processing unit (CPU), a graphics processing unit (GPU) and a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or at least one of other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0098] The memory may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. Among them, the memory is used to store a computer program, and the processor can execute the computer program accordingly after receiving an execution instruction.

[0099] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented in other ways. The apparatus embodiments described above are merely schematic, for example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the apparatus, method and computer program product according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and a module, a program segment or a part of a code contains one or more executable instructions for implementing a specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0100] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0101] If the function is implemented in the form of a software function module 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 application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present application.

[0102] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A laser quality optimization method, characterized in that: include: Set the seed source laser parameters and debug each level of amplification inside the amplifier according to the preset target output parameters of the laser system; Continuously adjusting the compressor to compress the amplified laser pulse, and obtaining pulse parameters and laser system parameters corresponding to the shortest pulse width after compression; Adjust the seed source laser parameters, then repeatedly debug each level of amplification inside the amplifier, and continuously adjust the compressor to compress the amplified laser pulse, obtain the pulse parameters and laser system parameters corresponding to the shortest pulse width after compression, and obtain the pulse parameters of the shortest pulse width corresponding to multiple different seed source laser parameters and the laser system parameters corresponding to the shortest pulse width; Based on the pulse parameters of the shortest pulse width corresponding to the parameters of multiple different seed source lasers, determine the optimal pulse compression result and the laser system parameters corresponding to the optimal pulse compression result; Based on the laser system parameters corresponding to the optimal pulse compression result, the actual parameters in the laser system are optimized so that the laser system outputs optimized laser pulses.

2. The laser quality optimization method according to claim 1, characterized in that: The step of continuously adjusting the compressor to compress the amplified laser pulse and obtaining pulse parameters and laser system parameters corresponding to the shortest pulse width after compression includes: Comparing the pulse width values ​​of all compressed laser pulses obtained by adjusting the compressor, and determining the laser pulse with the shortest pulse width value; Based on the laser pulse with the shortest pulse width, the seed source laser parameters, amplifier parameters and compressor parameters in the current laser system are obtained.

3. The laser quality optimization method according to claim 1, characterized in that: The step of adjusting the seed source laser parameters includes: The intracavity net dispersion in the seed source laser is adjusted by adjusting the grating pair spacing of the seed source laser or adjusting the fiber parameters.

4. The laser quality optimization method according to claim 3, characterized in that: The step of adjusting the grating pair spacing of the seed source laser or adjusting the optical fiber parameters comprises: According to the preset adjustment parameters, set the grating pair spacing or fiber parameters in sequence until all adjustment parameters are set.

5. The laser quality optimization method according to claim 1, characterized in that: The step of determining the optimal pulse compression result and the laser system parameters corresponding to the optimal pulse compression result based on the pulse parameters of the shortest pulse width corresponding to the multiple different seed source laser parameters includes: For laser pulses with the shortest pulse width corresponding to multiple different seed source laser parameters, the Strehl ratio values ​​are calculated respectively; The laser pulse corresponding to the largest Strehl ratio value is selected as the optimal pulse compression result.

6. The laser quality optimization method according to claim 1, characterized in that: The step of optimizing actual parameters in the laser system based on the laser system parameters corresponding to the optimal pulse compression result so that the laser system outputs optimized laser pulses includes: The actual parameters in the laser system are set to the laser system parameters corresponding to the optimal pulse compression results.

7. A laser system, characterized in that: include: Control terminal, laser seed source, stretcher, amplifier and compressor; The laser seed source, the stretcher, the amplifier and the compressor are connected in sequence; The laser seed source is used to emit seed laser; The amplifier is used to amplify the laser pulse after being stretched by the stretcher; The compressor is used to compress the amplified laser pulse and then output the laser pulse; The control terminal is used to execute the laser quality optimization method according to any one of claims 1 to 6 to control the laser seed source, the stretcher, the amplifier and the compressor to optimize the output laser pulse.

8. A terminal device, characterized in that: The terminal device comprises a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the laser quality optimization method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer program is stored therein, and when the computer program is executed on a processor, the laser quality optimization method according to any one of claims 1 to 6 is implemented.

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