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

Abstract

The invention provides a laser power self-stabilization method, a self-stabilization device, equipment and a medium, and relates to the technical field of femtosecond lasers, and the laser power self-stabilization method comprises the following steps: obtaining a power error real-time value through a current output power value and a target power value according to a fast convergence algorithm; the pump source current value at the next moment is obtained according to a fast convergence algorithm, the output power value at the moment is obtained according to the real-time value of the pump source current, and the power error value gradually tends to 0 through repeated iteration, so that the power of the laser is accurately converged to the target power value; and the problem of power fluctuation caused by interference of factors of the laser or external factors is avoided.

Description

Technical Field

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

[0002] The laser pulse width of a femtosecond laser is very short, about 200 femtoseconds, and it has high single-pulse energy and high repetition frequency, and has a good processing effect on brittle materials. Femtosecond lasers mostly adopt all-fiber amplification or a combination of solid amplification technologies. During the use of the laser, due to the limitations of the laser's own mechanism, the power at the laser output port will decay or change periodically. Common reasons for the change in the laser power in the main body include the attenuation of the pump, the temperature fluctuation of the water chiller, the temperature fluctuation of the environment, the deformation of the mechanical structure, etc. Summary of the Invention

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

[0004] In a first aspect, the present invention provides a method for self-stabilizing the power of a laser, including the following steps: S100. Set a target power value; S200. Obtain the output power value at the current moment of the laser; S300. Obtain the real-time value of the power error at the current moment according to the target power value and the output power value at the current moment; S400. Obtain the real-time value of the pump source current at the next moment according to the real-time value of the power error; 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 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 tends to 0.

[0005] According to the technical solution provided by the present invention, step S400 includes the following steps: S410. Obtain 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.

[0006] According to the technical solution provided by the present invention, step S420 is implemented by the following formula:

[0007] Wherein, represents the real-time value of the power error; IPS 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 samplings, j represents the j th sampling, I ( j +1) represents the real-time value of the pump source current at the j +1th sampling.

[0008] According to the technical solution provided by the present invention, step S200 further includes the following steps: S210. Set a target power threshold range, and the target power threshold range has a maximum power threshold and a minimum power threshold; S220. Determine whether the output power value at the current moment is within the target power threshold range. If it is, 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.

[0009] According to the technical solution provided by the present invention, step S300 includes the following steps: S310. Obtain the real-time value of the power error at the previous moment; S320. Determine the magnitude of 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. If the real-time value of the power error at the current moment is less than or equal to the real-time value of the power error at the previous moment, execute step S330; if the real-time value of the power error at the current moment is greater than the real-time value of the power error at the previous moment, 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.

[0010] In a second aspect, the present invention provides a laser power self-stabilization device, including: A real-time power data monitoring module, and the real-time power data monitoring module is used to obtain the output power value of the laser; A fast-converging self-stabilizing module, the input end of the fast-converging self-stabilizing module is connected to the output end of the real-time power data monitoring module, and is configured to obtain the real-time value of the pump source current according to the output power value and the target power value; A power adjustment module, the input end of the power adjustment module is connected to the output end of the fast-converging self-stabilizing module, and is configured to generate pump light according to the real-time value of the pump source current; A laser main optical path control module, the input end of the laser main optical path control module is connected to the output end of the power adjustment module, and its output end is connected to the input end of the real-time power data monitoring module, and is configured to emit laser through the pump light.

[0011] According to the technical solution provided by the present invention, the fast-converging self-stabilizing module includes: An input unit, the input unit is configured to receive the target power value; A power error calculation unit, the input end of the power error calculation unit is connected to the output end of the input unit and the output end of the real-time power data monitoring module, and is configured to obtain the real-time value of the power error according to the target power value and the output power value; A fast-converging algorithm unit, the input end of the fast-converging algorithm unit is connected to the output end of the power error calculation unit, and its output end is connected to the input end of the power adjustment module, and is configured to store a fast-converging algorithm and input the real-time value of the power error into the fast-converging algorithm to obtain the real-time value of the pump source current.

[0012] According to the technical solution provided by the present invention, the real-time power data monitoring module includes: An optical intensity sensor, the optical intensity sensor is connected to the output end of the laser main optical path control module, and is configured to receive the laser emitted by the laser main optical path control module and obtain the analog power signal of the laser; An analog-to-digital conversion circuit, the input end of the analog-to-digital conversion circuit is connected to the output end of the optical intensity sensor, and its output end is connected to the input end of the power error calculation unit, and the analog-to-digital conversion circuit is configured to convert the analog power signal into the digital output power value.

[0013] In a third aspect, the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the laser power self-stabilizing method as described above are implemented.

[0014] Fourthly, the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the laser power self-stabilization method as described above are implemented.

[0015] In summary, the present invention proposes a laser power self-stabilization method. According to the fast convergence strategy, the real-time power error value at the current moment is obtained by comparing the output power value at the current moment with the target power value. Then, the real-time pump source current value at the next moment and the output power value at the next moment are obtained based on the real-time power error value. The output power value at the current moment is updated to the output power value at the next moment. Through repeated iteration, the real-time power error value tends to 0, avoiding the problem of power drop caused by the interference of the laser's own factors or external factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic flow chart of the laser power self-stabilization method provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of the laser power self-stabilization device provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of the terminal device provided by an embodiment of the present invention.

[0017] The reference numerals in the drawings are represented as: 1. Fast convergence 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. Driver; 711. Removable medium. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

[0019] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and embodiments.

[0020] Embodiment 1 Just as the technical problems mentioned in the background art, the present invention proposes a laser power self-stabilization device, asFigure 2 As shown in, it includes: A real-time power data monitoring module 4, which is used to obtain the output power value of the laser; A fast-converging self-stabilizing module 1, the input end of the fast-converging self-stabilizing module 1 is connected to the output end of the real-time power data monitoring module 4, and is used to obtain the 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 is connected to the output end of the fast-converging self-stabilizing module 1, and is used to generate pump light according to the real-time value of the pump source current; Among them, the power adjustment module 2 consists of a constant current source circuit and a pump source. The input of the constant current source current is connected to the output of the fast-converging self-stabilizing module 1, and its output is connected to the input of the pump source; the pump source is usually a device that can generate light of a specific wavelength or frequency. During operation, the magnitude of the current directly affects the light emission intensity and characteristics of the pump source. The larger the current value, the stronger the pump light formed. The constant current source circuit is used to provide a stable constant current to the pump source; the constant current source current receives the real-time value of the pump source current input by the fast-converging self-stabilizing module 1, processes it into a stable current and inputs it to the pump source, and forms pump light through the pump source.

[0021] A laser main optical path control module 3, the input end of the laser main optical path control module 3 is connected to the output end of the power adjustment module 2, and its output end is connected to the input end of the real-time power data monitoring module 4, and is used to emit laser through the pump light.

[0022] Among them, the laser main optical path control module 3 is the main system for generating laser pulses in 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, receives the pump light emitted from the power adjustment module 2, and amplifies it through the internal signal optical path to form the pulsed laser emitted by the laser. In the present invention, closed-loop control is added to the laser power control, so that the power of the laser can be stabilized at the target set value, and the power will not change due to the disturbance of the laser itself or the outside world, so that the power of the laser can quickly and timely converge to the set power and remain unchanged during startup and operation.

[0023] In a preferred embodiment, the fast-converging self-stabilizing module 1 includes: An input unit 11, and the input unit 11 is configured to receive the target power value; Optionally, the self-stabilizing device includes a display screen, which is connected to the input unit 11. An engineer can input the target power value on the display screen and then transmit it to the input unit 11. The stable power value that the laser wants to reach during operation is the target power value. Moreover, the input unit 11 can also receive the initial value of the pump source current input by the engineer, and the initial value of the pump source current is the pump source current value when the engineer reaches the target power during debugging. A power error calculation unit 12, the input end of the power error calculation unit 12 is connected to the output end of the input unit 11 and also to the output end of the real-time power monitoring module, and is configured to obtain the real-time value of the power error according to the target power value and the output power value. Among them, a difference operation function is set in the power error calculation unit 12. 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. A fast convergence algorithm unit 13, the input end of the fast convergence algorithm unit 13 is connected to the output end of the power error calculation unit 12, and its output end is connected to the input end of the power adjustment module 2, 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. Among them, the real-time value of the power error output by the power error calculation unit 12 and the initial value of the pump source current are used as the independent variable and the initial value of the algorithm 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 obtained by transforming this function value is used as the input value of the power adjustment module 2.

[0024] In a preferred embodiment, the real-time power data monitoring module 4 includes: An optical intensity sensor, the optical intensity sensor is connected to the output end of the laser main optical path control module 3, and is configured to receive the laser emitted by the laser main optical path control module 3 and obtain the analog power signal of the laser. An analog-to-digital conversion circuit, the input end of the analog-to-digital conversion circuit is connected to the output end of the optical intensity sensor, and its output end is connected to the input end of the power error calculation unit 12. The analog-to-digital conversion circuit is used to convert the analog power signal into the digital output power value.

[0025] Among them, the light intensity sensor is connected to the light intensity sensor through an attenuation element. Optionally, the attenuation element is a semi-percentage lens with a light transmittance of usually 0.5%, thus avoiding the problem that the laser directly irradiates on the light intensity sensor, resulting in sensor damage or inaccurate measurement. When the attenuated laser irradiates on the light intensity sensor, electron-hole pairs will be 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. Then, the current signal is converted into a voltage signal through the internal circuit of the light intensity sensor. The magnitude of this voltage signal changes continuously, which is the analog power signal and directly reflects the strength of the laser power, that is, the output power value. Since the computer 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.

[0026] Embodiment 2 Based on Embodiment 1, the present invention proposes a method for self-stabilizing the laser power, as Figure 1 shown, including the following steps: S100. Set the target power value; S200. Obtain the output power value of the laser at the current moment; obtain the output power value at the current moment through the real-time power monitoring module; including the following steps: S210. Set the target power threshold range, and the target power threshold range has a maximum power threshold and a minimum power threshold; S220. Judge whether the output power value at the current moment is within the target power threshold range. If it is, 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.

[0027] Among them, steps S210 - S240 are used to judge whether the output power value is available. When the output power value is within the threshold range, it is available, and continue with the following steps S300 - S600; if it is judged that the output power value is not available, discard the output power value monitored this time, and use the output power value monitored at the previous moment to replace the output power value at the current moment, and continue with the following steps S300 - S600.

[0028] S300. According to the target power value and the output power value at the current moment, obtain the real-time value of the power error at the current moment; input the output power value at the current moment and the target power value into the power error calculation unit 12 to obtain the real-time value of the power error; including the following steps: S310. Obtain the real-time power error value at the previous moment; S320. Judge the magnitude of the real-time power error value at the current moment and the real-time power error value at the previous moment. If the real-time power error value at the current moment is less than or equal to the real-time power error value at the previous moment, execute step S321; if the real-time power error value at the current moment is greater than the real-time power error value at the previous moment, execute step S322; S330. Continue to execute steps S400 - S600; S340. Take the real-time power error value at the previous moment as the real-time power error value at the current moment, and continue to execute steps S400 - S600.

[0029] Among them, steps S310 - S340 are used to judge the real-time power error value at the current moment and the real-time power error value at the previous moment again after judging that the output power is within the threshold range. If the real-time power error value at the current moment is larger, continue to execute steps S400 - S600; if the real-time power error value 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 larger and larger, so it violates the convergence goal. Therefore, such data can be discarded, take the real-time power error value at the previous moment as the real-time power error value at the current moment, and continue to execute steps S400 - S600.

[0030] S400. Obtain the real-time pump source current value at the next moment according to the real-time power error value; Among them, a first fast convergence algorithm is constructed, and the first fast convergence algorithm is shown as the following formula: Formula (1) In the formula, represents the real-time pump source current value; KTR is the current power transfer coefficient, usually KTR taking 1 is okay. K P represents the proportional coefficient; K d represents the differential coefficient; K i represents the integral coefficient; , P s represents the target power value, represents; t represents the sampling interval time. Since the computer cannot calculate according to the continuous algorithm, the first fast convergence algorithm needs to be discretized to obtain the first discrete fast convergence algorithm, which is shown as the following formula: Formula (2) In the formula, represents jThe real-time value of the pump source current during the +1st sampling; represents the real-time value of the power error; n represents the total number of samplings, j represents the j th sampling.

[0031] Inputting the real-time value of the power error into formula (2) can obtain the real-time value of the pump source current at the next moment.

[0032] In a preferred embodiment, step S400 further includes the following steps: S410. Obtain the initial value of the pump source current; wherein, the initial value of the pump source current can be the pump source current value when the engineer reaches the target power value during the debugging process; 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; wherein, a second fast convergence algorithm is constructed, and the second fast convergence algorithm is shown as the following formula: Formula (3) In the formula, represents the initial value of the pump source current; discretize the second fast convergence algorithm to obtain a second discrete fast convergence algorithm, as shown in the following formula: Formula (4); Inputting the real-time value of the power error and the initial value of the pump source current into formula (4) can obtain the real-time value of the pump source current at the next moment.

[0033] 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; Input the real-time value of the pump source current at the next moment into the power adjustment module 2, and then through the laser main optical path control module 3 to form a laser, and then obtain the output power value at the next moment through the real-time power data monitoring module 4; 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 tends to 0.

[0034] Through the fast-converging self-stabilization method, the power of the laser is accurately converged to the target power value, avoiding the problem of power fluctuations caused by the interference of the laser's own factors or external factors; through the initial pump source current optimization formulas (1) and (2), the speed of the converging self-stabilization is accelerated, making the result of the first run of the algorithm near the target power value set at the factory. After adjustment by the algorithm, the power of the laser can be more accurately converged to the target power value, thus enabling the power of the femtosecond laser to be stabilized at the factory-set power value at an extremely fast speed after startup.

[0035] Embodiment 3 As Figure 3 shown, the computer system 700 of the terminal device includes a CPU 701, which can perform various appropriate actions and processes according to the program stored in the ROM 702 or the program loaded from the storage section 708 into the RAM 703. In the RAM 703, various programs and data required for system operation are also stored. The CPU 701, ROM 702, and RAM 703 are connected to each other via a bus 704. The I / O interface 705 is also connected to the bus 704. The following components are connected to the I / O interface 705: an input section 706 including a keyboard, a mouse, etc.; an output section 707 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN card, a modem, etc. The communication section 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, etc., is installed on the drive 710 as needed, so that the computer program read from it can be installed into the storage section 708 as needed.

[0036] Specifically, according to an embodiment of the present invention, the process described above with reference to the flowchart Figure 1 can be implemented as a computer software program. For example, Embodiment 3 of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program codes for performing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication section, and / or installed from the removable medium. When the computer program is executed by the CPU 701, the above functions defined in the computer system 700 are executed.

[0037] It should be noted that the computer-readable medium shown in the present invention can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the above two. The 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 of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, the computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted by any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0038] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of the systems, methods, and computer program products according to various embodiments 3 of the present invention. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above module, program segment, or 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 blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0039] As another aspect, the present invention also provides a computer-readable medium, which may be included in the electronic device described in the above embodiments; or may exist alone without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the one or more programs are executed by an electronic device, the electronic device implements the laser power self-stabilization method as described in the above embodiments.

[0040] For example, the electronic device can implement as shown in Figure 1 : S100. Set a 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 according to 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.

[0041] 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 the 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 and embodied by multiple modules or units.

[0042] In addition, although the steps of the method in the present invention are described in a specific order in the drawings, this does not require or imply that these steps must be executed in this specific order, or that all the steps shown must be executed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc.

[0043] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described here can be implemented by software, or by a combination of software and necessary hardware.

[0044] The above description is only a preferred embodiment of the present invention and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (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. Setting the target power value; S200. Obtain the current output power value of the laser; S300. According to the target power value and the current output power value, obtain the real-time value of the power error at the current moment; 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, including the following steps: S410. Obtaining 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, which is achieved 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 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.

2. The laser power self-stabilization method according to claim 1, characterized in that: Step 200 also includes the following steps: S210. Setting 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 yes, execute step S230, if no, 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.

3. The laser power self-stabilization method according to claim 1, characterized in that: Step S300 includes the following steps: S310. Obtain the real-time value of the power error at the previous moment; S320. Determine the magnitude of the real-time power error value at the current moment and the real-time power error value at the previous moment. If the real-time power error value at the current moment is less than or equal to the real-time power error value at the previous moment, execute step S330; if the real-time power error value at the current moment is greater than the real-time power error value at the previous moment, 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.

4. A laser power self-stabilization device, used to implement the laser power self-stabilization method according to any one of claims 1 to 3, 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 an output power value of the laser; A fast convergence self-stabilizing module (1), wherein an input end of the fast convergence self-stabilizing module (1) is connected to an output end of the real-time power data monitoring module (4), and is used to obtain a real-time value of a 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), 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 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.

5. The self-stabilizing device according to claim 4, 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 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.

6. The self-stabilizing device according to claim 5, characterized in that: The real-time power data monitoring module (4) comprises: A light intensity sensor, the light intensity sensor being connected to an 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 to 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 of the analog-to-digital conversion circuit 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.

7. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the laser power self-stabilization method according to any one of claims 1 to 3 are implemented.

8. 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 3 are implemented.

Images