Laser power self-stabilization method, self-stabilization device, equipment and medium

Abstract

The present invention proposes a laser power self-stabilization method, a self-stabilization device, an equipment and a medium, and relates to the technical field of femtosecond lasers. The laser power self-stabilization method obtains a real-time power error value by using a fast convergence algorithm to obtain a pump source current value at the next moment and a target power value, obtains the output power value at this moment based on the fast convergence algorithm, and obtains the output power value at this moment based on the real-time pump source current value. Through repeated iterations, the power error value gradually approaches 0, so that the power of the laser accurately converges to the target power value, avoiding the problem of power fluctuation caused by interference from the laser itself or external factors.

Description

Technical Field

[0001] The present invention relates to the technical field of femtosecond lasers, and in particular to a laser power self-stabilization method, a self-stabilization device, equipment and a medium. Background Art

[0002] Femtosecond lasers have very short pulse widths of approximately 200 femtoseconds, and feature high single-pulse energy and a high repetition rate, making them excellent for processing brittle materials. Femtosecond lasers often utilize all-fiber amplification or are combined with solid-state amplification technology. During use, the laser's inherent mechanical limitations can cause the power at the laser's light output to decay or periodically vary. Common underlying causes of laser power variations include pump attenuation, water-cooling unit temperature fluctuations, ambient temperature fluctuations, and mechanical structure deformation. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, the present invention aims to provide a laser power self-stabilization method, self-stabilization device, equipment and medium.

[0004] In a first aspect, the present invention provides a method for self-stabilizing laser power, comprising the following steps:

[0005] S100. Set the target power value;

[0006] S200. Get the current output power value of the laser;

[0007] S300. According to the target power value and the current output power value, obtain the current moment power error real-time value;

[0008] S400. Obtain the next moment's real-time value of the pump source current according to the real-time value of the power error;

[0009] S500. Obtain the output power value at the next moment according to the real-time value of the pump source current at the next moment;

[0010] S600. Update the output power value at the current moment to the output power value at the next moment, and repeat steps S200-S600 until the real-time value of the power error approaches 0.

[0011] According to the technical solution provided by the present invention, step S400 includes the following steps:

[0012] S410. Get the initial value of the pump source current;

[0013] S420. Obtain a real-time value of the pump source current at a next moment according to the initial value of the pump source current and the real-time value of the power error.

[0014] According to the technical solution provided by the present invention, step S420 is implemented by the following formula:

[0015]

[0016] in, Represents the real-time value of the power error; I PS represents the initial value of the pump source current; KTP represents the current power transfer coefficient; K P represents the proportionality coefficient; K d represents the differential coefficient; K i represents the integral coefficient; n represents the total number of sampling times, j Representative j subsampling, I ( j +1) represents the j +1 real-time value of the pump source current sampled.

[0017] According to the technical solution provided by the present invention, step S200 further includes the following steps:

[0018] S210. Set a target power threshold range, wherein the target power threshold range has a maximum power threshold and a minimum power threshold;

[0019] S220. Determine whether the current output power value is within the target power threshold range. If so, execute step S230; if not, execute step S240;

[0020] S230. Continue to execute steps S300-S600;

[0021] S240. Obtain the output power value of the laser at the previous moment, set it as the output power value at the current moment, and continue to execute steps S300-S600.

[0022] According to the technical solution provided by the present invention, step S300 includes the following steps:

[0023] S310 obtains the real-time value of the power error at the previous moment;

[0024] S320. Determine the size of the current moment's real-time power error value and the previous moment's real-time power error value. If the current moment's real-time power error value is less than or equal to the previous moment's real-time power error value, execute step S330; if the current moment's real-time power error value is greater than the previous moment's real-time power error value, execute step S340;

[0025] S330. Continue to execute steps S400-S600;

[0026] S340. Use the real-time value of the power error at the previous moment as the real-time value of the power error at the current moment, and continue to execute steps S400-S600.

[0027] In a second aspect, the present invention provides a laser power self-stabilizing device, comprising:

[0028] A real-time power data monitoring module, wherein the real-time power data monitoring module is used to obtain the output power value of the laser;

[0029] a fast convergence and self-stabilization module, wherein the input end of the fast convergence and self-stabilization module is connected to the output end of the real-time power data monitoring module, and is used to obtain a real-time value of the pump source current according to the output power value and the target power value;

[0030] a power adjustment module, the input end of the power adjustment module being connected to the output end of the fast convergence self-stabilization module, and being configured to generate pump light according to the real-time value of the pump source current;

[0031] A laser main optical path control module, the input end of which is connected to the output end of the power adjustment module, and the output end of which is connected to the input end of the real-time power data monitoring module, is used to emit laser light through the pump light.

[0032] According to the technical solution provided by the present invention, the fast convergence self-stabilization module includes:

[0033] an input unit configured to receive the target power value;

[0034] a power error calculation unit, wherein an input end of the power error calculation unit is connected to an output end of the input unit and to an output end of the real-time power data monitoring module, and is configured to obtain a real-time power error value according to the target power value and the output power value;

[0035] A fast convergence algorithm unit, wherein the input end of the fast convergence algorithm unit is connected to the output end of the power error calculation unit, and the output end is connected to the input end of the power adjustment module, and is configured to store the fast convergence algorithm and input the real-time value of the power error into the fast convergence algorithm to obtain the real-time value of the pump source current.

[0036] According to the technical solution provided by the present invention, the real-time power data monitoring module includes:

[0037] A light intensity sensor connected to an output end of the laser main optical path control module and configured to receive the laser emitted by the laser main optical path control module and obtain an analog power signal of the laser;

[0038] An analog-to-digital conversion circuit, wherein the input end of the analog-to-digital conversion circuit is connected to the output end of the light intensity sensor, and the output end thereof is connected to the input end of the power error calculation unit, and the analog-to-digital conversion circuit is used to convert the analog power signal into the digital output power value.

[0039] In a third aspect, the present invention provides a terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the laser power self-stabilization method as described above when executing the computer program.

[0040] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the laser power self-stabilization method as described above are implemented.

[0041] In summary, the present invention proposes a method for self-stabilization of laser power. According to a rapid convergence strategy, the output power value at the current moment and the target power value are combined to obtain the real-time value of the power error at the current moment, and the real-time value of the pump source current and the output power value at the next moment are obtained based on the real-time value of the power error. The output power value at the current moment is updated to the output power value at the next moment. Through repeated iterations, the real-time value of the power error approaches 0, thereby avoiding the problem of power drop caused by interference from the laser itself or external factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of a process for a laser power self-stabilization method according to an embodiment of the present invention;

[0043] Figure 2 A schematic diagram of the structure of a laser power self-stabilization device provided in an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the structure of a terminal device provided in an embodiment of the present invention.

[0045] The reference numerals in the figures are as follows:

[0046] 1. Fast convergence and self-stabilization module; 11. Input unit; 12. Power error calculation unit; 13. Fast convergence algorithm unit; 2. Power adjustment module; 3. Laser main optical path control module; 4. Real-time power data monitoring module; 700. Computer system; 701. CPU; 702. ROM; 703. RAM; 704. Bus; 705. I / O interface; 706. Input part; 707. Output part; 708. Storage part; 709. Communication part; 710. Drive; 711. Removable media. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] Example 1

[0050] As the technical problem mentioned in the background technology, the present invention proposes a laser power self-stabilizing device, such as Figure 2 Shown, including:

[0051] A real-time power data monitoring module 4 is used to obtain the output power value of the laser;

[0052] A fast convergence and self-stabilization module 1, wherein the input end of the fast convergence and self-stabilization module 1 is connected to the output end of the real-time power data monitoring module 4, and is used to obtain a real-time value of the pump source current according to the output power value and the target power value;

[0053] A power adjustment module 2, the input end of the power adjustment module 2 is connected to the output end of the fast convergence self-stabilization module 1, and is used to generate pump light according to the real-time value of the pump source current;

[0054] The power adjustment module 2 comprises a constant current source circuit and a pump source. The input of the constant current source is connected to the output of the fast convergence self-stabilization module 1, and its output is connected to the input of the pump source. The pump source is typically a device capable of generating light of a specific wavelength or frequency. During operation, the magnitude of the current directly affects the luminous intensity and characteristics of the pump source. A larger current value produces a stronger pump light. The constant current source circuit is used to provide a stable constant current to the pump source. The constant current source receives the real-time value of the pump source current input by the fast convergence self-stabilization module 1, processes it into a stable current, and inputs it to the pump source, generating pump light through the pump source.

[0055] The laser main optical path control module 3 has its input end connected to the output end of the power adjustment module 2 and its output end connected to the input end of the real-time power data monitoring module 4, and is used to emit laser light through the pump light.

[0056] The laser main optical path control module 3 is the main system for generating laser pulses for the entire laser. This system can generate ultrashort pulse lasers with a certain power, a certain repetition frequency, and a certain number of pulse trains, according to user settings. The laser main optical path control module 3 includes the entire laser signal optical path, the amplification system optical path, and related control mechanisms. It receives the pump light emitted by the power adjustment module 2 and the internal signal optical path, amplifying them to form the pulsed laser emitted by the laser. The present invention adds closed-loop control to the laser power control, allowing the laser power to be stabilized at the target set value. The power will not change due to the laser itself or external disturbances. This ensures that the laser power can quickly and promptly converge to the set power and remain unchanged after startup and during operation.

[0057] In a preferred embodiment, the fast convergence self-stabilization module 1 includes:

[0058] an input unit 11, wherein the input unit 11 is configured to receive the target power value;

[0059] Optionally, the self-stabilizing device includes a display screen connected to the input unit 11, and an engineer can input the target power value on the display screen, which is then transmitted to the input unit 11; the stable power value to be achieved during the operation of the laser is the target power value, and the input unit 11 can also receive an initial pump source current value input by the engineer, and the initial pump source current value is the pump source current value when the engineer reaches the target power during the commissioning process;

[0060] a power error calculation unit 12, wherein an input end of the power error calculation unit 12 is connected to an output end of the input unit 11 and to an output end of the real-time power monitoring module, and is configured to obtain a real-time power error value according to the target power value and the output power value;

[0061] The power error calculation unit 12 is provided with a difference operation function, and the power error calculation unit 12 inputs the target power value and the output power value into the difference operation function to obtain the real-time value of the power error;

[0062] a fast convergence algorithm unit 13, wherein the input end of the fast convergence algorithm unit 13 is connected to the output end of the power error calculation unit 12, and the output end of the fast convergence algorithm unit 13 is connected to the input end of the power adjustment module 2, and is configured to store a fast convergence algorithm and input the real-time value of the power error into the fast convergence algorithm to obtain the real-time value of the pump source current;

[0063] Among them, the real-time value of the power error and the initial value of the pump source current output by the power error calculation unit 12 are used as the independent variables and initial values ​​of the fast convergence algorithm, and are input into the fast convergence algorithm unit 13 to form a binary composite convergence function with the real-time value of the power error and time as independent variables. The output value finally obtained by transforming this function value is used as the input value of the power adjustment module 2.

[0064] In a preferred embodiment, the real-time power data monitoring module 4 includes:

[0065] A light intensity sensor connected to the output end of the laser main light path control module 3 and configured to receive the laser emitted by the laser main light path control module 3 and obtain an analog power signal of the laser;

[0066] An analog-to-digital conversion circuit, wherein the input end of the analog-to-digital conversion circuit is connected to the output end of the light intensity sensor, and the output end thereof is connected to the input end of the power error calculation unit 12, and the analog-to-digital conversion circuit is used to convert the analog power signal into the digital output power value.

[0067] Wherein, the light intensity sensor is connected to the light intensity sensor through an attenuation element. Optionally, the attenuation element is a half-ratio lens with a transmittance of usually 0.5%, thereby avoiding the problem of the laser directly irradiating the light intensity sensor, causing damage to the sensor or inaccurate measurement. When the attenuated laser irradiates the light intensity sensor, electron-hole pairs are generated. The number of electron-hole pairs is proportional to the power of the laser. The electron-hole pairs will form a current, and the magnitude of the current reflects the intensity of the laser. The current signal is then converted into a voltage signal through the circuit inside the light intensity sensor. The magnitude of this voltage signal changes continuously, which is an analog power signal, directly reflecting the strength of the laser power, that is, the output power value. Since computers can only process digital signals, it is necessary to convert the analog output power value into a digital output power value through the analog-to-digital conversion circuit.

[0068] Example 2

[0069] Based on Example 1, the present invention proposes a laser power self-stabilization method, such as Figure 1 As shown, the following steps are included:

[0070] S100. Set the target power value;

[0071] S200 obtains the current moment output power value of the laser; obtains the current moment output power value through the real-time power monitoring module; comprises the following steps:

[0072] S210. Set a target power threshold range, wherein the target power threshold range has a maximum power threshold and a minimum power threshold;

[0073] S220. Determine whether the current output power value is within the target power threshold range. If so, execute step S230; if not, execute step S240;

[0074] S230. Continue to execute steps S300-S600;

[0075] S240. Obtain the output power value of the laser at the previous moment, set it as the output power value at the current moment, and continue to execute steps S300-S600.

[0076] Among them, steps S210-S240 are used to determine whether the output power value is available. When the output power value is within the threshold range, it is available, and the following steps S300-S600 are continued; if it is determined that the output power value is not available, the output power value monitored this time is discarded, and the output power value monitored at the previous moment is used to replace the output power value at the current moment, and the following steps S300-S600 are continued.

[0077] S300. According to the target power value and the current output power value, obtain the current moment power error real-time value; the current moment output power value and the target power value are input to the power error calculation unit 12 to obtain the power error real-time value; comprising the following steps:

[0078] S310 obtains the real-time value of the power error at the previous moment;

[0079] S320. Determine the size of the current moment's real-time power error value and the previous moment's real-time power error value. If the current moment's real-time power error value is less than or equal to the previous moment's real-time power error value, execute step S321; if the current moment's real-time power error value is greater than the previous moment's real-time power error value, execute step S322;

[0080] S330. Continue to execute steps S400-S600;

[0081] S340. Use the real-time value of the power error at the previous moment as the real-time value of the power error at the current moment, and continue to execute steps S400-S600.

[0082] Among them, steps S310-S340 are used to judge the real-time value of the power error at the current moment and the real-time value of the power error at the previous moment again after judging that the output power is within the threshold range. If the real-time value of the power error at the current moment is larger, continue to execute steps S400-S600; if the real-time value of the power error at the current moment is smaller, it means that after this convergence, the gap between the output power value and the power target value is getting bigger and bigger, so it violates the convergence goal. Therefore, such data can be discarded, and the real-time value of the power error at the previous moment is used as the real-time value of the power error at the current moment, and continue to execute steps S400-S600.

[0083] S400. Obtain the next moment's real-time value of the pump source current according to the real-time value of the power error;

[0084] Wherein, a first fast convergence algorithm is constructed, and the first fast convergence algorithm is shown as follows:

[0085] Formula (1)

[0086] Where, Represents the real-time value of the pump source current; KTR is the current power transfer coefficient, usually KTR Just take 1. K P represents the proportionality coefficient; K d represents the differential coefficient; K i represents the integral coefficient; , P s represents the target power value, represent; t Represents the sampling interval. The computer cannot perform calculations based on a continuous algorithm, so the first fast convergence algorithm needs to be discretized to obtain a first discrete fast convergence algorithm, as shown in the following formula:

[0087] Formula (2)

[0088] Where, represent j +Real-time value of pump source current at 1 sampling time; represents the real-time value of the power error; n represents the total number of sampling times, j Representative j times sampling.

[0089] The real-time value of the pump source current at the next moment can be obtained by inputting the real-time value of the power error into formula (2).

[0090] In a preferred embodiment, step S400 further includes the following steps:

[0091] S410 obtains the initial value of the pump source current; wherein, the initial value of the pump source current can be obtained by engineers during the commissioning process, when the target power value is reached;

[0092] S420. Obtain the real-time value of the pump source current at the next moment according to the initial value of the pump source current and the real-time value of the power error;

[0093] Wherein, a second fast convergence algorithm is constructed, and the second fast convergence algorithm is shown as follows:

[0094] Formula (3)

[0095] Where, represents the initial value of the pump source current; the second fast convergence algorithm is discretized to obtain a second discrete fast convergence algorithm, as shown in the following formula:

[0096] Formula (4);

[0097] The real-time value of the pump source current at the next moment can be obtained by inputting the real-time value of the power error and the initial value of the pump source current into formula (4).

[0098] S500. Obtain the output power value at the next moment according to the real-time value of the pump source current at the next moment;

[0099] The real-time value of the pump source current at the next moment is input into the power adjustment module 2, and then passes through the laser main optical path control module 3 to form a laser, and then the output power value at the next moment is obtained through the real-time power data monitoring module 4;

[0100] S600. Update the output power value at the current moment to the output power value at the next moment, and repeat steps S200-S600 until the real-time value of the power error approaches 0.

[0101] The present invention uses a fast convergence self-stabilization method to enable the power of the laser to converge accurately on the target power value, thereby avoiding the problem of power fluctuation caused by the laser's own factors or interference from external factors; through the pump source current initial value optimization formula (1) and formula (2), the speed of convergence and self-stabilization is accelerated, so that the result of the first operation of the algorithm is close to the factory-set target power value, and after adjustment of the algorithm, the power of the laser can be more accurately converged on the target power value, thereby achieving that the power of the femtosecond laser can be stabilized at the factory-set power value at an extremely fast speed after startup.

[0102] Example 3

[0103] like Figure 3As shown, the computer system 700 of the terminal device includes a CPU 701, which can perform various appropriate actions and processes according to the programs stored in the ROM 702 or the programs loaded from the storage part 708 into the RAM 703. Various programs and data required for system operation are also stored in the RAM 703. The CPU 701, ROM 702 and RAM 703 are connected to each other via a bus 704. An I / O interface 705 is also connected to the bus 704. The following components are connected to the I / O interface 705: an input part 706 including a keyboard, a mouse, etc.; an output part 707 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage part 708 including a hard disk, etc.; and a communication part 709 including a network interface card such as a LAN card, a modem, etc. The communication part 709 performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface 705 as needed. A removable medium 711, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like, is mounted on the drive 710 as needed, so that a computer program read therefrom is installed into the storage section 708 as needed.

[0104] In particular, according to an embodiment of the present invention, the above reference process Figure 1 The described process can be implemented as a computer software program. For example, Embodiment 3 of the present invention includes a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication component and / or installed from a removable medium. When the computer program is executed by CPU 701, the above-described functions defined in the present computer system 700 are performed.

[0105] It should be noted that the computer-readable medium described in the present invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media can include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical fiber cable, RF, or any suitable combination thereof.

[0106] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the system, method and computer program product according to various embodiments 3 of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession 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 block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0107] As another aspect, the present invention further provides a computer-readable medium, which may be included in the electronic device described in the above embodiments, or may exist independently and not be incorporated into the electronic device. The computer-readable medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device implements the laser power self-stabilization method described in the above embodiments.

[0108] For example, the electronic device may implement Figure 1 As shown in: S100. Set the target power value; S200. Obtain the output power value of the laser at the current moment; S300. According to the fast convergence strategy, obtain the real-time value of the pump source current based on the target power value and the output power value at the current moment; S400. Obtain the output power value at the next moment based on the real-time value of the pump source current; S500. Update the output power value at the current moment to the output power value at the next moment, and repeat steps S200-S500.

[0109] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments disclosed in the present invention, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0110] Furthermore, although the steps of the method of the present invention are described in a particular order in the accompanying drawings, this does not require or imply that the steps must be performed in this particular order, or that all steps must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0111] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by combining software with necessary hardware.

[0112] The above description is merely a preferred embodiment of the present invention and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in the present invention.

Claims

1. A laser power self-stabilization method, characterized in that: The steps include: S100. Set the target power value; S200. Get the current output power value of the laser; S300. According to the target power value and the current output power value, obtain the current moment power error real-time value; S400. Obtaining the real-time value of the pump source current at the next moment according to the real-time value of the power error, comprising the following steps: S410. Get the initial value of the pump source current; S420. Obtain the real-time value of the pump source current at the next moment according to the initial value of the pump source current and the real-time value of the power error, by the following formula: in, Represents the real-time value of the power error; I PS represents the initial value of the pump source current; KTP represents the current power transfer coefficient; K P represents the proportionality coefficient; K d represents the differential coefficient; K i represents the integral coefficient; n represents the total number of sampling times, j Representative j subsampling, I ( j +1) represents the j +1 real-time value of the pump source current sampled; S500. Obtain the output power value at the next moment according to the real-time value of the pump source current at the next moment; S600. Update the current output power value to the next output power value, and repeat steps S200-S600 until the real-time power error value approaches 0; Step S200 also includes the following steps: S210. Set a target power threshold range, wherein the target power threshold range has a maximum power threshold and a minimum power threshold; S220. Determine whether the current output power value is within the target power threshold range. If so, execute step S230; if not, execute step S240; S230. Continue to execute steps S300-S600; S240. Obtain the output power value of the laser at the previous moment, set it as the output power value at the current moment, and continue to execute steps S300-S600.

2. The laser power self-stabilization method according to claim 1, characterized in that: Step S300 includes the following steps: S310 obtains the real-time value of the power error at the previous moment; S320. Determine the size of the current moment's real-time power error value and the previous moment's real-time power error value. If the current moment's real-time power error value is less than or equal to the previous moment's real-time power error value, execute step S330; if the current moment's real-time power error value is greater than the previous moment's real-time power error value, execute step S340; S330. Continue to execute steps S400-S600; S340. Use the real-time value of the power error at the previous moment as the real-time value of the power error at the current moment, and continue to execute steps S400-S600.

3. A laser power self-stabilization device, used to implement the laser power self-stabilization method according to any one of claims 1 to 2, characterized in that: The self-stabilizing device comprises: A real-time power data monitoring module (4), wherein the real-time power data monitoring module (4) is used to obtain the output power value of the laser; A fast convergence self-stabilizing module (1), wherein the input end of the fast convergence self-stabilizing module (1) is connected to the output end of the real-time power data monitoring module (4), and is used to obtain a real-time value of the pump source current according to the output power value and the target power value; A power adjustment module (2), the input end of the power adjustment module (2) being connected to the output end of the fast convergence self-stabilizing module (1), and being used to generate pump light according to the real-time value of the pump source current; A laser main light path control module (3) is provided, wherein the input end of the laser main light path control module (3) is connected to the output end of the power adjustment module (2), and the output end of the laser main light path control module (3) is connected to the input end of the real-time power data monitoring module (4), and is used to emit laser light through the pump light.

4. The self-stabilizing device according to claim 3, characterized in that: The fast convergence self-stabilizing module (1) comprises: An input unit (11), the input unit (11) being configured to receive the target power value; a power error calculation unit (12), wherein an input end of the power error calculation unit (12) is connected to an output end of the input unit (11) and to an output end of the real-time power data monitoring module (4), and is configured to obtain a real-time power error value according to the target power value and the output power value; A fast convergence algorithm unit (13), wherein the input end of the fast convergence algorithm unit (13) is connected to the output end of the power error calculation unit (12), and the output end thereof is connected to the input end of the power adjustment module (2), and is configured to store a fast convergence algorithm and input the real-time value of the power error into the fast convergence algorithm to obtain the real-time value of the pump source current.

5. The self-stabilizing device according to claim 4, characterized in that: The real-time power data monitoring module (4) comprises: A light intensity sensor, the light intensity sensor being connected to the output end of the laser main light path control module (3), and configured to receive the laser emitted by the laser main light path control module (3) and obtain an analog power signal of the laser; An analog-to-digital conversion circuit, wherein the input end of the analog-to-digital conversion circuit is connected to the output end of the light intensity sensor, and the output end thereof is connected to the input end of the power error calculation unit (12), and the analog-to-digital conversion circuit is used to convert the analog power signal into the output power value of the digital quantity.

6. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the laser power self-stabilization method according to any one of claims 1 to 2 are implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the laser power self-stabilization method according to any one of claims 1 to 2 are implemented.

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