Bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber

Abstract

The invention provides a chromium telluride germanide saturable absorber-based bright and dark soliton fiber laser, which relates to the technical field of fiber lasers and comprises a pump light source module for providing pump light and coupling the pump light into a laser resonant cavity through a wavelength division multiplexer; and the laser resonant cavity module comprises a wavelength division multiplexer, an erbium-doped fiber, a polarization controller, a polarization independent isolator, a single-mode fiber, a chromium telluride germanium saturable absorber and an output coupler which jointly form a laser oscillation and amplification environment. Parameters are dynamically adjusted through fuzzy control and monitored and analyzed in real time, comprehensive monitoring, evaluation and optimization of the laser performance are achieved in combination with the performance evaluation and optimization module, and the stability, efficiency and spectral purity of the laser are improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber lasers, in particular to a bright and dark soliton optical fiber laser based on a chromium germanium telluride saturable absorber. Background Art

[0002] In the field of fiber lasers, optical modulators, as key components, play a vital role in the output characteristics of lasers. In recent years, with the rapid development of materials science, new materials such as graphene, black phosphorus, topological insulators, MXene, and transition metal dichalcogenides have been widely used in the research and development of optical modulators due to their unique optoelectronic properties. These materials have shown great potential in improving the performance of optical modulators, such as increasing modulation speed, reducing losses, and enhancing stability.

[0003] However, despite the remarkable progress made in the application of optical modulators, these new materials still have limitations in some aspects. For example, although graphene has extremely high carrier mobility and a wide spectral response range, its preparation process is complicated, and its absorption efficiency at certain specific wavelengths needs to be improved; black phosphorus has the problem of poor air stability, and is prone to oxidation after long-term exposure to air, resulting in performance degradation; although topological insulators have unique surface state characteristics, the interference of their bulk phase state and the high preparation cost limit their wide application; although MXene materials have good conductivity and processability, their long-term stability in fiber lasers still needs to be further verified; and transition metal dichalcogenides may face problems such as narrow bandwidth or defects introduced during the preparation process that affect performance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a bright and dark soliton fiber laser based on a chromium germanium telluride saturable absorber, so as to improve the performance and application range of the fiber laser.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: In the first aspect, a bright and dark soliton fiber laser based on a chromium germanium telluride saturable absorber comprises: A pump light source module is used to provide pump light and couple the pump light into the laser resonant cavity through a wavelength division multiplexer; The laser resonant cavity module includes a wavelength division multiplexer, an erbium-doped optical fiber, a polarization controller, a polarization-independent isolator, a single-mode optical fiber, a chromium germanium telluride saturable absorber and an output coupler, which together constitute an environment for laser oscillation and amplification; The chromium germanium telluride saturable absorber module is used to dynamically adjust the parameters of each component through the fuzzy control algorithm, including controlling the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller, to achieve stable oscillation and output of the laser, and to monitor the light intensity and phase parameters in the resonant cavity in real time. The fuzzy control algorithm is used to process and analyze the monitoring data to obtain key information on the stability index, pulse shape and spectral characteristics of the laser; The output coupler module is used to output part of the laser in the laser resonant cavity and record the key parameters of the output laser power, wavelength, and pulse width; The performance evaluation and optimization module is used to comprehensively evaluate the performance of the laser, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module, and optimize and adjust the parameters of each component of the laser based on the evaluation results.

[0006] Further, providing pump light and coupling the pump light into the laser resonant cavity through a wavelength division multiplexer includes: A semiconductor fiber laser is used as a pump light source, wherein the core wavelength is set to match the pump absorption peak of the erbium-doped fiber; The pump light is transmitted to a wavelength division multiplexer through an optical fiber. The wavelength division multiplexer is provided with two input ports and one output port, wherein one input port receives the pump light of the pump light source, and the other input port receives the optical signal in the laser resonant cavity; In the wavelength division multiplexer, the wavelength of the pump light is combined with the wavelength of the optical signal in the laser resonant cavity, so that the pump light enters the laser resonant cavity. After being processed by the wavelength division multiplexer, the pump light is coupled into the laser resonant cavity.

[0007] Furthermore, the erbium-doped optical fiber is used as a gain medium to amplify the pump light and generate laser light; the polarization controller is used to adjust the polarization state of the laser to optimize the performance of the laser and the output pulse characteristics; the polarization-independent isolator ensures unidirectional transmission of the laser in the resonant cavity; the single-mode optical fiber is used to connect various devices in the resonant cavity and serves as a transmission medium for the laser.

[0008] Furthermore, the parameters of each component are dynamically adjusted through the fuzzy control algorithm, including controlling the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller, to achieve stable oscillation and output of the laser, and to monitor the light intensity and phase parameters in the resonant cavity in real time. The monitoring data is processed and analyzed using the fuzzy control algorithm to obtain key information on the stability index, pulse shape and spectral characteristics of the laser, including: Determine the input variables of the fuzzy control, including the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light, and the current state of the polarization controller, and determine the output variables of the fuzzy control, that is, the parameters of each component, including the adjustment instructions of the saturation characteristics adjustment amount of the absorber, the adjustment amount of the resonant cavity length, the adjustment amount of the pump light power, and the adjustment amount of the polarization controller state; Define fuzzy sets and membership functions for each input and output variable to describe the fuzziness of the variable, and formulate a set of fuzzy rules to describe the relationship between input and output variables; The light intensity and phase parameters in the resonant cavity are monitored in real time by using sensors, and the monitored data are converted into membership degrees in the fuzzy set to obtain the converted membership degrees; According to the rules in the fuzzy rule base, fuzzy reasoning is performed on the converted membership to calculate the fuzzy membership of each output variable; Through the defuzzification process, the fuzzy membership is converted into adjustment instructions, that is, the adjustment amount of each component parameter, and the adjustment instructions are used to dynamically adjust the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller; The real-time monitoring data, including light intensity, phase parameters and adjusted component parameters, are processed and analyzed, and the key information of laser stability indicators, pulse shape and spectral characteristics are calculated using fuzzy control algorithms.

[0009] Furthermore, the calculation formula of the fuzzy membership of each output variable is: ; in, Represents output variable In fuzzy sets The degree of membership in ; Indicates the number of rules in the fuzzy rule base; Represents the index of the rule; Indicates The adjustment factor of the rule, over time change; Indicates time; Indicates the number of input variables in each rule; Represents the index of the input variable; Indicates The input variable is The weights in the rules; Indicates input variables; Indicates Parameters related to the rule; Represents input variables In the The corresponding fuzzy sets in the rules The degree of membership in ; Representation and input variables In the The corresponding fuzzy sets in the rules Related parameters; Indicated in In the rules, the output variable The corresponding fuzzy set The degree of membership in ; Represents an output variable.

[0010] Furthermore, the Whale Optimization Algorithm is used to comprehensively evaluate the performance of the laser, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module. Based on the evaluation results, the parameters of each component of the laser are optimized and adjusted, including: Collect key parameter data from the output coupler module, including coupling efficiency, reflectivity, and loss, and obtain key information from the chromium germanium telluride saturable absorber module, including absorption coefficient, saturation intensity, and recovery time; According to the physical characteristics and working principle of the laser, a performance evaluation model is established, and key parameter data and key information are input into the performance evaluation model to obtain the initial performance evaluation results; Initialize the parameters of the whale optimization algorithm, including the number of whales, search space, and number of iterations, and randomly generate a set of laser component parameters in the search space as the initial solution; calculate the laser performance corresponding to the initial solution based on the performance evaluation model; According to the laser performance corresponding to the initial solution, the search space is explored by simulating the foraging behavior of whales, including encircling prey and bubble net attack strategies, and the performance of each set of newly generated laser component parameters is evaluated, and the performance of the new solution is compared with the current solution to obtain the evaluation results; According to the evaluation results, the search space exploration process is repeated until the preset number of iterations is reached, the final laser component parameters are output, and the final laser component parameters are used to adjust and optimize the components of the laser.

[0011] Furthermore, the calculation formula of the laser performance corresponding to the initial solution is: ; Indicates the comprehensive performance evaluation value of the laser; represents the stability weight coefficient; represents the number of measurement time points; Indicates a specific point in time; Indicates at a point in time Output optical power at ; Indicates the average value of the output optical power; represents the efficiency weight coefficient; Indicates the output optical power; Indicates the input optical power; represents the spectral purity weight coefficient; Indicates the main mode power; Indicates the strongest side mode power.

[0012] Furthermore, a performance evaluation model is established based on the physical characteristics and working principle of the laser, and key parameter data and key information are input into the performance evaluation model to obtain initial performance evaluation results, including: According to the physical characteristics and working principle of the laser, define comprehensive performance evaluation indicators to reflect the overall performance of the laser; According to the importance of each performance indicator, the value of the weight coefficient is determined, and the key parameter data, including pump power, fiber length, coupling efficiency, and key information, including absorption coefficient, saturation intensity, and recovery time, are input into the performance evaluation model; In the performance evaluation model, the key parameter data and key information are calculated using the performance evaluation formula to obtain the value of each performance indicator; The values ​​of various performance indicators are integrated, and the comprehensive performance evaluation result of the laser is obtained according to the comprehensive performance evaluation index and the weight coefficient.

[0013] In a second aspect, a computing device includes: one or more processors; A storage device is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber.

[0014] In a third aspect, a computer-readable storage medium stores a program, and when the program is executed by a processor, the bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber is realized.

[0015] The above solution of the present invention includes at least the following beneficial effects: The pump light source module provides stable pump light, and combined with the components in the laser resonant cavity module, such as erbium-doped fiber and polarization controller, together form an efficient and stable laser oscillation and amplification environment. The dynamic adjustment function of the chromium germanium telluride saturable absorber module can control key parameters such as the saturation characteristics of the absorber in real time, ensuring the stable oscillation and output of the laser in the resonant cavity, effectively improving the stability of the laser.

[0016] The chromium germanium telluride saturable absorber module adopts a fuzzy control algorithm, which can dynamically adjust the parameters of various components of the laser, such as the length of the resonant cavity, the power of the pump light, etc., to achieve the optimal output state of the laser.

[0017] This intelligent parameter adjustment method not only improves the performance of the laser, but also simplifies the operation process and reduces the requirements for the professional skills of the operator.

[0018] The chromium germanium telluride saturable absorber module can monitor the light intensity, phase and other parameters in the resonant cavity in real time, and use the fuzzy control algorithm to process and analyze the monitoring data to obtain key information such as the laser's stability index, pulse shape and spectral characteristics. The output coupler module is responsible for recording the output laser's power, wavelength, pulse width and other key parameters, providing accurate data support for performance evaluation.

[0019] The performance evaluation and optimization module comprehensively evaluates the performance of the laser based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module. Based on the evaluation results, the parameters of each component of the laser can be optimized and adjusted to further improve the performance indicators of the laser, such as stability, efficiency, and spectral purity. The bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber has excellent performance and can be widely used in optical communications, optical information processing, medical treatment, scientific research and other fields. Its stable and efficient laser output, as well as intelligent parameter adjustment and optimization functions, provide powerful tools and support for scientific research and applications in related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a bright and dark soliton fiber laser based on a chromium germanium telluride saturable absorber provided in an embodiment of the present invention.

[0021] Figure 2 The present invention provides a flow chart of a bright and dark soliton fiber laser based on a chromium germanium telluride saturable absorber using a whale optimization algorithm, comprehensively evaluating the performance of the laser, including stability, efficiency, and spectral purity, according to key parameters recorded by an output coupler module and key information of the chromium germanium telluride saturable absorber module, and optimizing and adjusting the parameters of each component of the laser according to the evaluation results. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0023] like Figure 1 As shown, an embodiment of the present invention proposes a bright and dark soliton fiber laser based on a chromium germanium telluride saturable absorber, comprising: A pump light source module 1 is used to provide pump light and couple the pump light into the laser resonant cavity through a wavelength division multiplexer; The laser resonant cavity module 2 includes a wavelength division multiplexer, an erbium-doped optical fiber, a polarization controller, a polarization-independent isolator, a single-mode optical fiber, a chromium germanium telluride saturable absorber and an output coupler, which together constitute an environment for laser oscillation and amplification; The chromium germanium telluride saturable absorber module 3 is used to dynamically adjust the parameters of each component through a fuzzy control algorithm, including controlling the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller, to achieve stable oscillation and output of the laser, and to monitor the light intensity and phase parameters in the resonant cavity in real time. The monitoring data is processed and analyzed using a fuzzy control algorithm to obtain key information on the stability index, pulse shape and spectral characteristics of the laser; The output coupler module 4 is used to output part of the laser in the laser resonant cavity and record the key parameters of the output laser power, wavelength and pulse width; The performance evaluation and optimization module 5 is used to comprehensively evaluate the performance of the laser, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module, and optimize and adjust the parameters of each component of the laser based on the evaluation results.

[0024] In the embodiment of the present invention, the pump light source module 1 provides stable and reliable pump light to ensure that the laser oscillation and amplification process in the laser resonant cavity has sufficient energy support, and efficiently couples the pump light into the laser resonant cavity through the wavelength division multiplexer, thereby reducing the optical path loss and improving the utilization rate of the pump light.

[0025] The components of the laser resonant cavity module 2 (wavelength division multiplexer, erbium-doped fiber, polarization controller, polarization-independent isolator, single-mode fiber, chromium germanium telluride saturable absorber and output coupler) work together to form a stable and efficient laser oscillation and amplification environment. Erbium-doped fiber, as a gain medium, provides a good laser amplification effect; polarization controller and polarization-independent isolator ensure the polarization stability of the laser; single-mode fiber ensures the single-mode output of the laser.

[0026] The chromium germanium telluride saturable absorber module 3 dynamically adjusts the parameters of each component through the fuzzy control algorithm, realizes the stable oscillation and output of the laser, and improves the adaptability and flexibility of the laser. The light intensity, phase and other parameters in the resonant cavity are monitored in real time, and the monitoring data are processed and analyzed using the fuzzy control algorithm, providing accurate data support for the performance evaluation and optimization of the laser. By controlling the parameters such as the saturation characteristics of the absorber, the laser pulse shape and spectral characteristics can be precisely controlled.

[0027] The output coupler module 4 outputs part of the laser in the laser resonant cavity, providing a direct laser source for the application of the laser. The key parameters of the output laser, such as power, wavelength, and pulse width, are recorded, providing an important reference for the performance evaluation and optimization of the laser. The performance evaluation and optimization module 5 comprehensively evaluates the performance of the laser, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module. Based on the evaluation results, the parameters of each component of the laser are optimized and adjusted to further improve the performance of the laser. Through continuous performance evaluation and optimization, the stability and reliability of the laser during long-term operation are ensured.

[0028] In a preferred embodiment of the present invention, providing pump light and coupling the pump light into the laser resonant cavity through a wavelength division multiplexer may include: A semiconductor fiber laser is used as a pump light source, wherein the core wavelength is set to match the pump absorption peak of the erbium-doped fiber; The pump light is transmitted to a wavelength division multiplexer through an optical fiber. The wavelength division multiplexer is provided with two input ports and one output port, wherein one input port receives the pump light of the pump light source, and the other input port receives the optical signal in the laser resonant cavity; In the wavelength division multiplexer, the wavelength of the pump light is combined with the wavelength of the optical signal in the laser resonant cavity, so that the pump light enters the laser resonant cavity. After being processed by the wavelength division multiplexer, the pump light is coupled into the laser resonant cavity.

[0029] In an embodiment of the present invention, a semiconductor fiber laser is selected as a pump light source because the semiconductor fiber laser has the advantages of small size, high efficiency, and good beam quality, and is suitable as a pump light source for the laser. The central wavelength of the semiconductor fiber laser is set to match the pump absorption peak of the erbium-doped fiber to ensure that the pump light can be effectively absorbed by the erbium-doped fiber, thereby providing sufficient gain. The pump light output by the semiconductor fiber laser is transmitted to the wavelength division multiplexer through optical fiber. As a transmission medium, optical fiber has the characteristics of low loss and high bandwidth, and is suitable for long-distance transmission of pump light. The wavelength division multiplexer is an important component in the optical fiber communication system, which can realize the transmission of optical signals of different wavelengths in the same optical fiber.

[0030] The designed wavelength division multiplexer has two input ports and one output port, wherein one input port is used for receiving pump light from a pump light source, and the other input port is used for receiving an optical signal in a laser resonant cavity.

[0031] The output port is used to output the optical signal after the pump light and the optical signal in the laser resonant cavity are combined. A wavelength combining mechanism is set inside the wavelength division multiplexer so that the pump light and the optical signal in the laser resonant cavity can be transmitted in the same optical fiber. The wavelength combining technology ensures that the pump light and the optical signal in the laser resonant cavity will not interfere with each other, thereby ensuring the stable operation of the laser.

[0032] The combined optical signal is output through the output port of the wavelength division multiplexer and enters the laser resonant cavity. In the laser resonant cavity, the pump light is absorbed by the erbium-doped fiber and converted into the energy required for laser oscillation. At the same time, other components in the laser resonant cavity (such as polarization controller, polarization-independent isolator, etc.) work together in the laser oscillation process to ensure the stable output of the laser.

[0033] Suppose there is a laser based on erbium-doped fiber, in which the pump light source uses a semiconductor fiber laser with a central wavelength of 980nm. This wavelength matches the pump absorption peak of the erbium-doped fiber, which can ensure that the pump light is effectively absorbed. The pump light is transmitted to the wavelength division multiplexer through the optical fiber. The wavelength division multiplexer has two input ports and one output port, one of which receives the 980nm pump light and the other receives the 1550nm laser signal in the laser resonant cavity. Inside the wavelength division multiplexer, the 980nm pump light and the 1550nm laser signal are combined into an optical signal in the same optical fiber. Then, this combined optical signal is output through the output port of the wavelength division multiplexer and enters the laser resonant cavity. In the laser resonant cavity, the 980nm pump light is absorbed by the erbium-doped fiber and converted into the energy required for laser oscillation. At the same time, other components in the laser resonant cavity (such as polarization controller, polarization-independent isolator, etc.) work together in the laser oscillation process to ensure the stable output of the 1550nm laser.

[0034] By using a semiconductor fiber laser that matches the erbium-doped fiber pump absorption peak as the pump light source and combining it with the wavelength merging technology of the wavelength division multiplexer, efficient use of the pump light is achieved, and the efficiency of the laser is improved. The use of the wavelength division multiplexer simplifies the optical path design, reduces the number of components in the optical path, and reduces the optical path loss and cost. The wavelength merging technology of the wavelength division multiplexer ensures that the pump light and the optical signal in the laser resonant cavity will not interfere with each other, thereby improving the stability of the laser. By adjusting the parameters such as the central wavelength of the semiconductor fiber laser and the power of the pump light, the output wavelength, power and other characteristics of the laser can be flexibly adjusted to meet the needs of different application scenarios.

[0035] In another preferred embodiment of the present invention, the erbium-doped optical fiber is used as a gain medium to amplify the pump light and generate laser light; the polarization controller is used to adjust the polarization state of the laser to optimize the performance and output pulse characteristics of the laser; the polarization-independent isolator ensures unidirectional transmission of the laser light in the resonant cavity; the single-mode optical fiber is used to connect various devices in the resonant cavity and serve as a transmission medium for the laser light, and may include: In an embodiment of the present invention, an erbium-doped fiber is placed in a laser resonant cavity as a gain medium. Erbium ions are doped inside the erbium-doped fiber. These ions can transition to a high energy level after absorbing the pump light, and release photons in the subsequent relaxation process to achieve amplification of the pump light. When the pump light enters the laser resonant cavity through a wavelength division multiplexer and irradiates the erbium-doped fiber, the erbium ions absorb the energy of the pump light and transition to a high energy level. In the erbium-doped fiber, the high-energy-level erbium ions release photons by stimulated radiation. These photons have the same wavelength and direction as the pump light, thereby achieving amplification of the pump light. The amplified light continuously oscillates in the resonant cavity to form a laser.

[0036] A polarization controller is installed in the laser resonant cavity, which can change the polarization state of the laser. The polarization controller can change the direction of the electric field vector of the laser by adjusting the polarization elements (such as liquid crystal molecules, wave plates, etc.) inside it, thereby achieving precise control of the polarization state of the laser. By adjusting the polarization state of the laser, the performance of the laser can be optimized, such as improving the power stability of the laser, improving the shape and width of the output pulse, etc. The polarization controller can also be used to compensate for the polarization state changes caused by effects such as fiber birefringence in the resonant cavity, ensuring that the laser oscillates stably in the resonant cavity.

[0037] A polarization-independent isolator is installed in the laser resonant cavity, which can ensure that the laser is transmitted unidirectionally in the resonant cavity. The working principle of the polarization-independent isolator is based on the selectivity of the polarization state and transmission direction of light. It allows light of a specific polarization state to enter from one end and pass out from the other end, while blocking the transmission of light in the opposite direction.

[0038] When the laser oscillates in the resonant cavity, the polarization-independent isolator ensures that the laser can only be transmitted in one direction, preventing the laser from forming reverse oscillation in the resonant cavity, thereby improving the stability and efficiency of the laser.

[0039] Single-mode optical fiber is used as the transmission medium to connect the various devices in the resonant cavity. Single-mode optical fiber has the characteristics of low loss, high bandwidth and single-mode transmission, and is suitable for laser transmission. Single-mode optical fiber connects the pump light, the optical signal in the laser resonant cavity, and the amplified laser together to form a complete laser oscillation and amplification system. During the laser transmission process, single-mode optical fiber ensures that the laser maintains a single-mode transmission state, avoiding problems such as mode competition and increased loss caused by multi-mode transmission. At the same time, single-mode optical fiber also has good mechanical strength and chemical stability, which can ensure the long-term stable operation of the laser.

[0040] In a preferred embodiment of the present invention, the parameters of each component are dynamically adjusted by a fuzzy control algorithm, including controlling the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller, to achieve stable oscillation and output of the laser, and to monitor the light intensity and phase parameters in the resonant cavity in real time. The monitoring data is processed and analyzed by the fuzzy control algorithm to obtain key information on the stability index, pulse shape and spectral characteristics of the laser, which may include: Determine the input variables of the fuzzy control, including the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light, and the current state of the polarization controller, and determine the output variables of the fuzzy control, that is, the parameters of each component, including the adjustment instructions of the saturation characteristics adjustment amount of the absorber, the adjustment amount of the resonant cavity length, the adjustment amount of the pump light power, and the adjustment amount of the polarization controller state; Define fuzzy sets and membership functions for each input and output variable to describe the fuzziness of the variable, and formulate a set of fuzzy rules to describe the relationship between input and output variables; The light intensity and phase parameters in the resonant cavity are monitored in real time by using sensors, and the monitored data are converted into membership degrees in the fuzzy set to obtain the converted membership degrees; According to the rules in the fuzzy rule base, fuzzy reasoning is performed on the converted membership to calculate the fuzzy membership of each output variable; Through the defuzzification process, the fuzzy membership is converted into adjustment instructions, that is, the adjustment amount of each component parameter, and the adjustment instructions are used to dynamically adjust the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller; The real-time monitoring data, including light intensity, phase parameters and adjusted component parameters, are processed and analyzed, and the key information of laser stability indicators, pulse shape and spectral characteristics are calculated using fuzzy control algorithms.

[0041] In the embodiment of the present invention, the input variables of the fuzzy control system are determined, and these variables include the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light, and the current state of the polarization controller. These input variables are key factors affecting laser oscillation and output. The output variables of the fuzzy control system, that is, the adjustment amount of each component parameter, are determined, including the adjustment instructions of the saturation characteristics adjustment amount of the absorber, the adjustment amount of the resonant cavity length, the adjustment amount of the pump light power, and the adjustment amount of the polarization controller state. These output variables will be used to dynamically adjust the parameters of each component of the laser.

[0042] Fuzzy sets and membership functions are defined for each input and output variable. Fuzzy sets are used to describe the fuzziness of variables, while membership functions are used to map specific values ​​of variables to membership in fuzzy sets. A set of fuzzy rules is formulated based on the operating principle and empirical knowledge of the laser. These rules describe the relationship between input and output variables, that is, how the output variables should be adjusted when the input variables are in a certain fuzzy state. Sensors are used to monitor the light intensity and phase parameters in the resonant cavity in real time. The sensors convert the monitored data into electrical signals and transmit them to the fuzzy control system. The fuzzy control system converts the received data into membership in the fuzzy set. This process is achieved through membership functions, which map specific data values ​​to a certain membership in the fuzzy set.

[0043] According to the rules in the fuzzy rule base, fuzzy reasoning is performed on the converted membership. The fuzzy reasoning process simulates the human thinking process, taking into account the fuzziness of the input variables and the uncertainty of the rules, and calculating the fuzzy membership of each output variable. Through the defuzzification process, the fuzzy membership is converted into a specific adjustment instruction. The defuzzification method can be the centroid method, etc., to convert the fuzzy membership into a definite value. According to the adjustment instruction, the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller are dynamically adjusted. This adjustment process is achieved by controlling the actuator, such as adjusting the position of the absorber, changing the length of the resonant cavity, adjusting the power of the pump light, etc.

[0044] The real-time monitoring data, including light intensity, phase parameters and adjusted component parameters, are processed and analyzed. Through the data processing algorithm, the key information of laser stability index, pulse shape and spectral characteristics are extracted. The fuzzy control algorithm is used to calculate and analyze these key information to provide data support for the performance evaluation and optimization of the laser.

[0045] Suppose you are monitoring the operating status of a laser and find that the light intensity in the resonant cavity suddenly drops. This change is monitored in real time by a sensor, and the light intensity data is converted into a membership in a fuzzy set. According to the rules in the fuzzy rule base, fuzzy reasoning is performed on the light intensity membership. The reasoning results show that in order to stabilize the laser oscillation, it is necessary to increase the power of the pump light and adjust the state of the polarization controller. Through the defuzzification process, the fuzzy membership is converted into specific adjustment instructions. The instructions show that it is necessary to increase the pump light power by 10% and adjust the polarization controller to a specific state. According to the adjustment instructions, the power of the pump light and the state of the polarization controller are dynamically adjusted. After the adjustment, the light intensity and phase parameters in the resonant cavity are monitored again, and it is found that the light intensity has stabilized and the laser oscillation has returned to normal.

[0046] By dynamically adjusting the parameters of each component through the fuzzy control algorithm, it is possible to monitor and respond to changes in the resonant cavity in real time to ensure the stable operation of the laser. This helps to improve the stability and reliability of the laser and extend its service life. The saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller can be dynamically adjusted based on the real-time monitoring data to optimize the output characteristics of the laser. This helps to obtain more stable laser pulse shapes and spectral characteristics to meet the needs of different application scenarios.

[0047] Fuzzy control algorithms can handle fuzziness and uncertainty. Through fuzzy reasoning and defuzzification processes, fuzzy membership is converted into specific adjustment instructions, which helps to improve control accuracy and response speed, and can respond to changes in the resonant cavity more quickly. Automated control through fuzzy control algorithms can autonomously adjust the parameters of each component of the laser, reducing the cost and risk of human intervention, which helps to improve the automation and intelligence level of the laser and reduce operating costs and maintenance difficulties.

[0048] In a preferred embodiment of the present invention, the calculation formula of the fuzzy membership of each output variable is: ; in, Represents output variable In fuzzy sets The degree of membership in ; Indicates the number of rules in the fuzzy rule base; Represents the index of the rule; Indicates The adjustment factor of the rule, over time change; Indicates time; Indicates the number of input variables in each rule; Represents the index of the input variable; Indicates The input variable is The weights in the rules; Indicates input variables; Indicates Parameters related to the rule; Represents input variables In the The corresponding fuzzy sets in the rules The degree of membership in ; Representation and input variables In the The corresponding fuzzy sets in the rules Related parameters; Indicated in In the rules, the output variable The corresponding fuzzy set The degree of membership in ; Represents an output variable.

[0049] In the embodiment of the present invention, all parameters are initialized, that is, the number of rules in the fuzzy rule base Set to 10 (for example, there are 10 fuzzy rules). The number of input variables in each rule is set to 3 (for example, each rule involves 3 input variables). All parameters related to fuzzy sets and rules (such as , etc.) are also initialized, for example, Representation Rules A specific threshold value, Represents input variables In the rules The width of the fuzzy set in , at the same time, initialize each input variable The current value of, for example, , , , and variables to store the results of the calculations.

[0050] For each input variable , according to its The corresponding fuzzy sets in the rules The definition and parameters , calculate the membership degree of the variable in the fuzzy set .

[0051] For each input variable In the The power in the rule , according to the definition and parameters of the rule Perform calculations.

[0052] For example, the weight is defined as ,in, It's a rule If a specific threshold ,and , the weight is calculated to be 0.5.

[0053] Traverse each rule in the fuzzy rule base, for each rule , calculate its corresponding output variable In fuzzy sets The membership degree in , at the same time, considering the adjustment coefficient of the rule , which may change with time Changes to reflect changes in the system state. For example, It may be defined as , which represents the adjustment factor for fluctuations over time.

[0054] For each output variable , based on the calculation results of all rules, use the formula Calculate its fuzzy set This process involves aggregating the membership of all rules and taking the largest and take the smaller Operations are used to simulate the fuzzy reasoning process of humans. Once the output variable is calculated In fuzzy sets The membership degree in will be defuzzified and converted into specific adjustment instructions.

[0055] Through the fuzzy control algorithm, the fuzziness and uncertainty of the input variables and the dynamic changes of the system state can be handled, which enables the system to better adapt to changes in the external environment and fluctuations in internal parameters, and improve the robustness and stability of the system. The fuzzy control algorithm allows the rule base and parameters to be dynamically adjusted according to actual needs, thereby enhancing the flexibility and scalability of the system. This makes it easier for the system to adapt to new application scenarios and changes in demand. Through sophisticated membership calculations and rule application, the fuzzy control algorithm can achieve more precise control and faster response speed, which helps to improve the performance and efficiency of the system and meet more stringent application requirements. The fuzzy control algorithm does not require precise mathematical models and complex calculation processes, so it can reduce the complexity and cost of the system. This makes the system easier to implement and maintain, and also helps to improve the reliability and availability of the system.

[0056] In a preferred embodiment of the present invention, the whale optimization algorithm is used to comprehensively evaluate the performance of the laser, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module, and the parameters of each component of the laser are optimized and adjusted according to the evaluation results, which may include: Collect key parameter data from the output coupler module, including coupling efficiency, reflectivity, and loss, and obtain key information from the chromium germanium telluride saturable absorber module, including absorption coefficient, saturation intensity, and recovery time; According to the physical characteristics and working principle of the laser, a performance evaluation model is established, and key parameter data and key information are input into the performance evaluation model to obtain the initial performance evaluation results; Initialize the parameters of the whale optimization algorithm, including the number of whales, search space, and number of iterations, and randomly generate a set of laser component parameters in the search space as the initial solution; calculate the laser performance corresponding to the initial solution based on the performance evaluation model; According to the laser performance corresponding to the initial solution, the search space is explored by simulating the foraging behavior of whales, including encircling prey and bubble net attack strategies, and the performance of each set of newly generated laser component parameters is evaluated, and the performance of the new solution is compared with the current solution to obtain the evaluation results; According to the evaluation results, the search space exploration process is repeated until the preset number of iterations is reached, the final laser component parameters are output, and the final laser component parameters are used to adjust and optimize the components of the laser.

[0057] In an embodiment of the present invention, key parameter data such as coupling efficiency, reflectivity, and loss are obtained from the output coupler module through a sensor. These data are stored in a data structure, such as an array or a dictionary. Similarly, key information such as absorption coefficient, saturation intensity, and recovery time are obtained through sensors, and these information are also stored in corresponding data structures. According to the physical characteristics and working principle of the laser, the influence of each component parameter on the laser performance (stability, efficiency, and spectral purity) is analyzed. Based on these analyses, a performance evaluation model function is written, which accepts component parameters as input and returns performance evaluation results (such as stability index, efficiency percentage, and spectral purity value). The model contains complex mathematical formulas or simulation algorithms to accurately reflect the working characteristics of the laser.

[0058] Determine the parameters of the whale optimization algorithm, including the number of whales (i.e., the number of solutions in the search space), the search space (i.e., the possible range of values ​​of the component parameters), and the number of iterations (i.e., the number of cycles in the search process).

[0059] A set of laser component parameters is randomly generated in the search space as an initial solution, which can be achieved through a random number generator or a uniform distribution function. The performance evaluation model function is called to calculate the laser performance corresponding to the initial solution.

[0060] Based on the laser performance corresponding to the initial solution, the foraging behavior of whales is simulated. This includes: Surrounding the prey: Based on the performance of the current solution, adjust the position of the whale (i.e., component parameters) to get closer to a better performing solution. This can be done by moving in the direction of a better performing solution or according to some heuristic rule.

[0061] Bubble Net Attack Strategy: Explore new solutions in the search space, which can be done through random search or based on some search strategy (such as gradient descent, genetic algorithm, etc.).

[0062] The performance of each newly generated set of laser component parameters is evaluated, and the performance of the new solution is compared with the current solution. Based on the evaluation results, the current solution is updated to a solution with better performance. The process of searching the space is repeated until the preset number of iterations is reached, and the final laser component parameters are output. These parameters are the final solution with the best performance during the search process. The final laser component parameters are used to adjust and optimize the components of the laser.

[0063] Consider a laser whose component parameters include the coupling efficiency (range 0-1), reflectivity (range 0-1), and loss (range 0-0.1) of the output coupler, and the absorption coefficient (range 0-10), saturation intensity (range 0-100), and recovery time (range 0-10ns) of the chromium germanium telluride saturable absorber; the goal is to maximize the efficiency of the laser.

[0064] Get coupling efficiency = 0.8, reflectivity = 0.1, and loss = 0.05 from the Output Coupler module. Get absorption coefficient = 5, saturation intensity = 50, and recovery time = 5ns from the Chromium Germanium Telluride Saturable Absorber module. Write a performance evaluation model function that calculates the efficiency of the laser based on the component parameters. Assume that the efficiency is some nonlinear function of these parameters. Set the number of whales to 10, the search space to the above parameter range, and the number of iterations to 100. Randomly generate a set of initial solutions, such as coupling efficiency = 0.7, reflectivity = 0.2, loss = 0.04, absorption coefficient = 4, saturation intensity = 45, and recovery time = 4ns. Call the performance evaluation model function, calculate the efficiency of the initial solution, simulate the foraging behavior of whales, generate a new solution and calculate its efficiency, compare the efficiency of the new solution with the current solution, update the current solution to a more efficient solution, repeat the search space exploration process 100 times, output the final solution, such as coupling efficiency = 0.85, reflectivity = 0.08, loss = 0.03, absorption coefficient = 6, saturation intensity = 55, recovery time = 3ns, and adjust the component parameters of the laser according to the final solution.

[0065] By optimizing and adjusting the laser component parameters through the whale optimization algorithm, the performance indicators of the laser, such as stability, efficiency and spectral purity, can be significantly improved. The entire optimization process can be automated without manual intervention, which improves work efficiency and accuracy. At the same time, as an intelligent search algorithm, the whale optimization algorithm can automatically explore the search space and find the optimal solution. The whale optimization algorithm can adapt to different laser system and component parameter ranges, so it has a wide range of application prospects. By optimizing the laser component parameters, the number of experiments and material waste can be reduced, thereby reducing R&D costs and time costs. Applying the whale optimization algorithm to the field of laser performance optimization can promote the innovation and development of related technologies and bring new ideas and directions to the research and application of the laser field.

[0066] In a preferred embodiment of the present invention, the calculation formula of the laser performance corresponding to the initial solution is: ; Indicates the comprehensive performance evaluation value of the laser; represents the stability weight coefficient; represents the number of measurement time points; Indicates a specific point in time; Indicates at a point in time Output optical power at ; Indicates the average value of the output optical power; represents the efficiency weight coefficient; Indicates the output optical power; Indicates the input optical power; represents the spectral purity weight coefficient; Indicates the main mode power; Indicates the strongest side mode power.

[0067] In the embodiment of the present invention, an optical power meter or a spectrometer is used to record the output optical power of the laser at different time points. , count the total number of measurement time points , use a power meter to measure the laser input and output power Use a spectrometer to measure the spectrum of the laser and identify the main mode power and the power of the strongest side mode . Calculate the average output optical power , calculate the standard deviation of the output optical power , calculate the stability index (assuming the stability weight coefficient ), stability index . Computational efficiency , calculate the efficiency index (assuming the efficiency weight coefficient ), efficiency index . Calculate the spectral purity (in decibels) as Calculate the spectral purity index (assuming the spectral purity weight coefficient ), spectral purity index Substitute the above average output optical power, standard deviation of output optical power, efficiency index, and spectral purity index into the formula to calculate the comprehensive performance evaluation value of the laser. .

[0068] By comprehensively considering the three key performance indicators of stability, efficiency and spectral purity, this evaluation method can fully reflect the performance of the laser. , and , the emphasis on stability, efficiency and spectral purity can be flexibly adjusted according to different application scenarios and needs. This evaluation method can provide clear guidance for the optimization and adjustment of the laser. For example, if the evaluation results show that the stability is insufficient, improvements can be made to the stability; if the efficiency is low, it can be sought. By quantitatively evaluating the performance of the laser, performance bottlenecks and room for improvement can be identified more quickly, thereby accelerating the R&D process and reducing R&D costs. The application of this evaluation method can promote the innovation and development of laser technology. By continuously optimizing the performance evaluation indicators and weight coefficients, more laser design schemes and application scenarios with superior performance can be explored. This evaluation method provides a standardized laser performance evaluation process, which facilitates communication and comparison between different laboratories and teams, and promotes the progress and development of the entire industry.

[0069] In another preferred embodiment of the present invention, a performance evaluation model is established according to the physical characteristics and working principle of the laser, and key parameter data and key information are input into the performance evaluation model to obtain an initial performance evaluation result, which may include: According to the physical characteristics and working principle of the laser, define comprehensive performance evaluation indicators to reflect the overall performance of the laser; According to the importance of each performance indicator, the value of the weight coefficient is determined, and the key parameter data, including pump power, fiber length, coupling efficiency, and key information, including absorption coefficient, saturation intensity, and recovery time, are input into the performance evaluation model; In the performance evaluation model, the key parameter data and key information are calculated using the performance evaluation formula to obtain the value of each performance indicator; The values ​​of various performance indicators are integrated, and the comprehensive performance evaluation result of the laser is obtained according to the comprehensive performance evaluation index and the weight coefficient.

[0070] In the embodiment of the present invention, the pumping mechanism, gain medium, resonant cavity structure, etc. of the laser are studied to determine the key factors affecting the performance of the laser, such as stability, efficiency, spectral purity, etc. Comprehensive performance evaluation index It is used to reflect the overall performance of the laser. It is the weighted sum of multiple performance indicators (such as stability, efficiency, spectral purity, etc.). According to the application scenarios and requirements of the laser, analyze the impact of each performance indicator (such as stability, efficiency, spectral purity, etc.) on the overall performance. According to the importance of each performance indicator, determine the weight coefficient , and These weight coefficients reflect the relative importance of each performance indicator in the comprehensive performance evaluation.

[0071] Pump power: record the pump power value of the laser.

[0072] Fiber Length: Measure and record the fiber length of the fiber laser.

[0073] Coupling efficiency: The coupling efficiency of the laser is obtained through experimental measurement.

[0074] Absorption coefficient: Refer to relevant information to obtain the absorption coefficient of the gain medium.

[0075] Saturation intensity: The saturation intensity of the laser is obtained by measuring.

[0076] Recovery Time: Records the recovery time of the laser under specific conditions.

[0077] Calculate the stability index based on the time series data of the output optical power .

[0078] Calculate the efficiency index based on the pump power and output optical power Calculate the efficiency index. According to the spectral data, calculate the ratio of the main mode power to the strongest side mode power to obtain the spectral purity index. , spectral purity (in decibels).

[0079] According to the other physical characteristics and working principles of the laser, other performance indicators (such as mode stability, wavelength stability, etc.) are defined and calculated, and the corresponding weight coefficients are assigned. The values ​​of each calculated performance indicator are added together to obtain the comprehensive performance evaluation result of the laser. .

[0080] By defining comprehensive performance evaluation indicators and considering multiple performance indicators and weight coefficients, the performance of the laser can be comprehensively evaluated. By analyzing the importance of each performance indicator and determining the weight coefficient, this method can provide clear guidance for the optimization of the laser. By quantitatively evaluating the performance of the laser, the R&D process can be accelerated and the R&D cost can be reduced. Promote the innovation and development of laser technology and explore more laser design solutions with superior performance. By defining performance evaluation formulas and weight coefficients, a set of standardized performance evaluation processes is provided, which is conducive to communication and comparison between different laboratories and teams.

[0081] An embodiment of the present invention further provides a computing device, comprising: a processor, and a memory storing a computer program, wherein when the computer program is executed by the processor, the bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber as described above is executed. All implementation methods in the above bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber embodiment are applicable to this embodiment, and can also achieve the same technical effect.

[0082] The embodiment of the present invention further provides a computer-readable storage medium storing instructions, which, when executed on a computer, enable the computer to execute the bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber as described above. All implementation methods in the above bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber embodiment are applicable to this embodiment and can achieve the same technical effect.

[0083] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber, characterized in that: include: A pump light source module is used to provide pump light and couple the pump light into the laser resonant cavity through a wavelength division multiplexer; The laser resonant cavity module includes a wavelength division multiplexer, an erbium-doped optical fiber, a polarization controller, a polarization-independent isolator, a single-mode optical fiber, a chromium germanium telluride saturable absorber and an output coupler, which together constitute an environment for laser oscillation and amplification; The chromium germanium telluride saturable absorber module is used to dynamically adjust the parameters of each component through the fuzzy control algorithm, including controlling the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller, to achieve stable oscillation and output of the laser, and to monitor the light intensity and phase parameters in the resonant cavity in real time. The fuzzy control algorithm is used to process and analyze the monitoring data to obtain key information on the stability index, pulse shape and spectral characteristics of the laser; The output coupler module is used to output part of the laser in the laser resonant cavity and record the key parameters of the output laser power, wavelength, and pulse width; The performance evaluation and optimization module is used to comprehensively evaluate the performance of the laser, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module, and optimize and adjust the parameters of each component of the laser based on the evaluation results.

2. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 1, characterized in that: Providing pump light and coupling the pump light into the laser resonant cavity through a wavelength division multiplexer, including: A semiconductor fiber laser is used as a pump light source, wherein the core wavelength is set to match the pump absorption peak of the erbium-doped fiber; The pump light is transmitted to a wavelength division multiplexer through an optical fiber. The wavelength division multiplexer is provided with two input ports and one output port, wherein one input port receives the pump light of the pump light source, and the other input port receives the optical signal in the laser resonant cavity; In the wavelength division multiplexer, the wavelength of the pump light is combined with the wavelength of the optical signal in the laser resonant cavity, so that the pump light enters the laser resonant cavity. After being processed by the wavelength division multiplexer, the pump light is coupled into the laser resonant cavity.

3. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 2, characterized in that: The erbium-doped optical fiber is used as a gain medium to amplify the pump light and generate laser light; the polarization controller is used to adjust the polarization state of the laser to optimize the performance of the laser and the output pulse characteristics; the polarization-independent isolator ensures unidirectional transmission of the laser in the resonant cavity; the single-mode optical fiber is used to connect various devices in the resonant cavity and serves as a transmission medium for the laser.

4. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 3, characterized in that: The fuzzy control algorithm is used to dynamically adjust the parameters of each component, including controlling the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light, and the state of the polarization controller, to achieve stable oscillation and output of the laser, and to monitor the light intensity and phase parameters in the resonant cavity in real time. The fuzzy control algorithm is used to process and analyze the monitoring data to obtain key information on the stability index, pulse shape, and spectral characteristics of the laser, including: Determine the input variables of the fuzzy control, including the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light, and the current state of the polarization controller, and determine the output variables of the fuzzy control, that is, the parameters of each component, including the adjustment instructions of the saturation characteristics adjustment amount of the absorber, the adjustment amount of the resonant cavity length, the adjustment amount of the pump light power, and the adjustment amount of the polarization controller state; Define fuzzy sets and membership functions for each input and output variable to describe the fuzziness of the variable, and formulate a set of fuzzy rules to describe the relationship between input and output variables; The light intensity and phase parameters in the resonant cavity are monitored in real time by using sensors, and the monitored data are converted into membership degrees in the fuzzy set to obtain the converted membership degrees; According to the rules in the fuzzy rule base, fuzzy reasoning is performed on the converted membership to calculate the fuzzy membership of each output variable; Through the defuzzification process, the fuzzy membership is converted into adjustment instructions, that is, the adjustment amount of each component parameter, and the adjustment instructions are used to dynamically adjust the saturation characteristics of the absorber, the length of the resonant cavity, the power of the pump light and the state of the polarization controller; The real-time monitoring data, including light intensity, phase parameters and adjusted component parameters, are processed and analyzed, and the key information of laser stability indicators, pulse shape and spectral characteristics are calculated using fuzzy control algorithms.

5. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 4, characterized in that: The calculation formula of the fuzzy membership of each output variable is: ； in, Represents output variable In fuzzy sets The degree of membership in ; Indicates the number of rules in the fuzzy rule base; Represents the index of the rule; Indicates The adjustment factor of the rule, over time change; Indicates time; Indicates the number of input variables in each rule; Represents the index of the input variable; Indicates The input variable is The weights in the rules; Indicates input variables; Indicates Parameters related to the rule; Represents input variables In the The corresponding fuzzy sets in the rules The degree of membership in ; Representation and input variables In the The corresponding fuzzy sets in the rules Related parameters; Indicated in In the rules, the output variable The corresponding fuzzy set The degree of membership in ; Represents an output variable.

6. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 5, characterized in that: Using the Whale Optimization Algorithm, the laser's performance is comprehensively evaluated, including stability, efficiency, and spectral purity, based on the key parameters recorded by the output coupler module and the key information of the chromium germanium telluride saturable absorber module. Based on the evaluation results, the parameters of each component of the laser are optimized and adjusted, including: Collect key parameter data from the output coupler module, including coupling efficiency, reflectivity, and loss, and obtain key information from the chromium germanium telluride saturable absorber module, including absorption coefficient, saturation intensity, and recovery time; According to the physical characteristics and working principle of the laser, a performance evaluation model is established, and key parameter data and key information are input into the performance evaluation model to obtain the initial performance evaluation results; Initialize the parameters of the whale optimization algorithm, including the number of whales, search space, and number of iterations, and randomly generate a set of laser component parameters in the search space as the initial solution; calculate the laser performance corresponding to the initial solution based on the performance evaluation model; According to the laser performance corresponding to the initial solution, the search space is explored by simulating the foraging behavior of whales, including encircling prey and bubble net attack strategies, and the performance of each set of newly generated laser component parameters is evaluated, and the performance of the new solution is compared with the current solution to obtain the evaluation results; According to the evaluation results, the search space exploration process is repeated until the preset number of iterations is reached, the final laser component parameters are output, and the final laser component parameters are used to adjust and optimize the components of the laser.

7. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 6, characterized in that: The calculation formula of the laser performance corresponding to the initial solution is: ； Indicates the comprehensive performance evaluation value of the laser; represents the stability weight coefficient; represents the number of measurement time points; Indicates a specific point in time; Indicates at a point in time Output optical power at ; Indicates the average value of the output optical power; represents the efficiency weight coefficient; Indicates the output optical power; Indicates the input optical power; represents the spectral purity weight coefficient; Indicates the main mode power; Indicates the strongest side mode power.

8. The bright and dark soliton fiber laser based on chromium germanium telluride saturable absorber according to claim 7, characterized in that: According to the physical characteristics and working principle of the laser, a performance evaluation model is established, and key parameter data and key information are input into the performance evaluation model to obtain the initial performance evaluation results, including: According to the physical characteristics and working principle of the laser, define comprehensive performance evaluation indicators to reflect the overall performance of the laser; According to the importance of each performance indicator, the value of the weight coefficient is determined, and the key parameter data, including pump power, fiber length, coupling efficiency, and key information, including absorption coefficient, saturation intensity, and recovery time, are input into the performance evaluation model; In the performance evaluation model, the key parameter data and key information are calculated using the performance evaluation formula to obtain the value of each performance indicator; The values ​​of various performance indicators are integrated, and the comprehensive performance evaluation result of the laser is obtained according to the comprehensive performance evaluation index and the weight coefficient.

9. A computing device, characterized in that include: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the bright and dark soliton fiber laser based on the chromium germanium telluride saturable absorber as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program, which, when executed by a processor, implements the bright and dark soliton fiber laser based on a chromium germanium telluride saturable absorber according to any one of claims 1 to 8.

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