Wide-spectrum light beam thermal halo distortion parameter calculation method and calculation model establishment method and system

Abstract

The invention relates to a wide-spectrum light beam thermal halo distortion parameter calculation method and a calculation model establishment method and system, and belongs to the field of wide-spectrum laser atmospheric transmission evaluation. The model building method comprises the following steps: collecting a first characteristic parameter of a wide-spectrum light beam and a second characteristic parameter at different transmission distances along a light path; and according to the first characteristic parameter of the wide-spectrum light beam and the second characteristic parameters at different transmission distances along the light path, completing establishment of a calculation model of the wide-spectrum light beam thermal halo distortion parameter. Aiming at the defects of a high-power wide-spectrum light beam thermal halo distortion parameter calculation method, the method considers the combined action of different wavelengths of a wide-spectrum light beam and the remarkable characteristic that the light source power of the wide-spectrum light beam is distributed on a plurality of wavelengths, and combines the principle that the wide-spectrum light beam is equivalent to monochromatic light to calculate the high-power wide-spectrum light beam thermal halo distortion parameter. And the calculation of the thermal halo distortion parameter of high-power wide-spectrum light beam atmospheric transmission is realized.

Description

Technical Field

[0001] The present invention belongs to the field of wide-spectrum laser atmospheric transmission evaluation, and particularly relates to a calculation method for thermal blooming distortion parameters of a wide-spectrum beam, as well as a method and system for establishing a calculation model. Background Art

[0002] When a high-power laser propagates in the atmosphere, it interacts with the atmosphere to generate a thermal blooming effect, that is, atmospheric molecules and aerosols absorb the beam energy, resulting in changes in the atmospheric temperature and density along the optical path, and further changing the atmospheric refractive index distribution, which in turn affects the propagation of the beam. The thermal blooming distortion parameter is a key parameter characterizing the strength of the thermal blooming effect and plays an important role in the field of high-power laser atmospheric transmission evaluation.

[0003] In recent years, wide-spectrum fiber lasers have developed rapidly and are a current research and application hotspot. The significant characteristic of a wide-spectrum laser source is that the power is distributed over multiple wavelengths. The atmospheric attenuation effect and thermal blooming effect on beams of different wavelengths are different, and the thermal blooming effects between different wavelengths interact with each other. All wavelengths of the wide-spectrum laser jointly heat the atmosphere to cause the thermal blooming effect. However, in projects such as optoelectronic system site selection and directed energy, there is a lack of a calculation method for thermal blooming distortion parameters of high-power wide-spectrum beams. Summary of the Invention

[0004] In view of the above problems, the present invention provides a calculation method for thermal blooming distortion parameters of a wide-spectrum beam, as well as a method and system for establishing a calculation model.

[0005] The first object of the present invention is to provide a method for establishing a calculation model for thermal blooming distortion parameters of a wide-spectrum beam, including: Collecting the first characteristic parameters of the wide-spectrum beam and the second characteristic parameters at different transmission distances along the optical path; Completing the establishment of the calculation model for thermal blooming distortion parameters of the wide-spectrum beam according to the first characteristic parameters of the wide-spectrum beam and the second characteristic parameters at different transmission distances along the optical path.

[0006] Further, the first characteristic parameters include the source power spectral density, effective radius, diffraction limit multiple, and focal length; The second characteristic parameters include the atmospheric absorption coefficient, atmospheric extinction coefficient, and atmospheric temperature data.

[0007] Further, the completing the establishment of the calculation model for thermal blooming distortion parameters of the wide-spectrum beam according to the first characteristic parameters of the wide-spectrum beam and the second characteristic parameters at different transmission distances along the optical path includes: Equivalent to a monochromatic light according to the source power spectral density of the wide-spectrum beam and calculating the equivalent wavelength of the wide-spectrum beam; Calculate the equivalent expansion radius at different transmission distances along the optical path according to the effective radius, diffraction limit multiple, and focal length of the broadband beam; Calculate the equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to the atmospheric absorption coefficient at different transmission distances along the optical path; Calculate the equivalent atmospheric transmittance at different transmission distances along the optical path according to the atmospheric extinction coefficient at different transmission distances along the optical path; Establish a calculation model for the thermal blooming distortion parameters of the broadband beam according to the equivalent expansion radius, equivalent atmospheric absorption coefficient, equivalent atmospheric transmittance at different transmission distances along the optical path, and the equivalent wavelength of the broadband beam.

[0008] Further, the calculation formula for the equivalent expansion radius at different transmission distances along the optical path is as follows:

[0009] Among them, is the equivalent expansion radius at different transmission distances along the optical path, is the effective radius of the broadband beam, is the diffraction limit multiple of the broadband beam, is the source power spectral density, z is the laser transmission distance, L is the focal length, is the maximum value of the power spectral distribution wavelength, is the minimum value of the power spectral distribution wavelength.

[0010] Further, the calculation formula for the equivalent atmospheric absorption coefficient at different transmission distances along the optical path is as follows:

[0011] Among them, is the equivalent atmospheric absorption coefficient at different transmission distances along the optical path, is the atmospheric absorption coefficient at the transmission distance z along the optical path, is the atmospheric extinction coefficient at the transmission distance s along the optical path.

[0012] Further, the calculation formula for the equivalent atmospheric transmittance at different transmission distances along the optical path is as follows:

[0013] Among them, is the equivalent atmospheric transmittance at different transmission distances along the optical path, is the atmospheric extinction coefficient at the transmission distance z along the optical path.

[0014] Furthermore, the calculation formula corresponding to the calculation model of the broadband beam thermal blooming distortion parameter is as follows:

[0015] Wherein, is the broadband beam thermal blooming distortion parameter, is the transmission distance along the optical path, z is the atmospheric temperature at the transmission distance along the optical path, z = 0 is the atmospheric temperature, is the transverse wind speed, which is the vector sum of the atmospheric wind speed and the optical path rotation wind, is the equivalent wavelength of the broadband light beam, represents the refractive index relative temperature change rate, represents the atmospheric density, is the specific heat capacity of the atmosphere at constant pressure.

[0016] The second object of the present invention is to provide a method for calculating the broadband beam thermal blooming distortion parameter, including: The above calculation model calculates the broadband beam thermal blooming distortion parameter according to the first characteristic parameter of the broadband beam and the second characteristic parameters at different transmission distances along the optical path.

[0017] The third object of the present invention is to provide a system for establishing a calculation model of the broadband beam thermal blooming distortion parameter, including a collection module and a calculation module: The collection module: is used to collect the first characteristic parameter of the broadband beam and the second characteristic parameters at different transmission distances along the optical path; The calculation module: is used to complete the establishment of the calculation model of the broadband beam thermal blooming distortion parameter according to the first characteristic parameter of the broadband beam and the second characteristic parameters at different transmission distances along the optical path.

[0018] Furthermore, the calculation module includes a first sub-module, a second sub-module, a third sub-module, a fourth sub-module and a fifth sub-module; The first sub-module is used to calculate the equivalent wavelength of the broadband beam by equivalenting the broadband beam to a monochromatic light according to the source power spectral density of the broadband beam; The second sub-module is used to calculate the equivalent expansion radius at different transmission distances along the optical path according to the effective radius, diffraction limit multiple and focal length of the broadband beam; The third sub-module is used to calculate the equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to the atmospheric absorption coefficient at different transmission distances along the optical path; The fourth sub-module is used to calculate the equivalent atmospheric transmittance at different transmission distances along the optical path according to the atmospheric extinction coefficient at different transmission distances along the optical path; The fifth sub-module is used to establish a calculation model for the thermal blooming distortion parameters of a broadband beam based on the equivalent expansion radius, equivalent atmospheric absorption coefficient, equivalent atmospheric transmittance at different transmission distances along the optical path, and the equivalent wavelength of the broadband beam.

[0019] Advantages of the present invention: The calculation method for the thermal blooming distortion parameters of the broadband beam of the present invention, the method for establishing the calculation model, and the system. In view of the deficiencies in the calculation method for the thermal blooming distortion parameters of high-power broadband beams, the present invention considers the combined action of different wavelengths of the broadband beam and the significant characteristics of the distribution of the broadband beam source power over multiple wavelengths. By combining the principle of equivalent broadband beam as a monochromatic light, the thermal blooming distortion parameters of the high-power broadband beam in atmospheric transmission are obtained; Among them, the calculation process takes into account the differences in atmospheric parameters at different wavelengths and the different intensities of the thermal blooming effect, and considers the combined action of the multi-wavelength thermal blooming effect; Finally, the calculation method or model for the thermal blooming distortion parameters of the broadband beam provided by the present invention realizes the calculation of the thermal blooming distortion parameters of the broadband beam, and further realizes the evaluation of the influence on the beam quality during the transmission of high-power lasers using the thermal blooming distortion parameters, laying a foundation for simulating and numerically simulating the thermal blooming effect of high-power broadband laser atmospheric transmission in the laboratory.

[0020] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures pointed out in the specification, claims, and drawings. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Shows a flowchart of a method for establishing a calculation model for the thermal blooming distortion parameters of a broadband beam according to an embodiment of the present invention; Figure 2 Shows the normalized power spectral density data according to an embodiment of the present invention; Figure 3 Shows the effective radius, diffraction limit multiple, and equivalent expansion radius data of the broadband beam according to an embodiment of the present invention, where (a) is the collected effective radius data; (b) is the collected diffraction limit multiple data; (c) is the calculated equivalent expansion radius data; Figure 4 Shows the atmospheric absorption coefficient and equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to an embodiment of the present invention. Among them, (a) is the atmospheric absorption coefficient at a transmission distance of 0.17 km collected; (b) is the atmospheric absorption coefficient at a transmission distance of 1.00 km collected; (c) is the atmospheric absorption coefficient at a transmission distance of 3.39 km collected; (d) is the distribution of the calculated equivalent atmospheric absorption coefficient with the transmission distance; Figure 5 Shows the atmospheric extinction coefficient and equivalent atmospheric transmittance at different transmission distances along the optical path according to an embodiment of the present invention. Among them, (a) is the atmospheric extinction coefficient at a transmission distance of 0.17 km collected; (b) is the atmospheric extinction coefficient at a transmission distance of 1.00 km collected; (c) is the atmospheric extinction coefficient at a transmission distance of 3.39 km collected; (d) is the distribution diagram of the calculated equivalent atmospheric transmittance with the transmission distance; Figure 6 Shows the distribution diagrams of the collected atmospheric temperature and transverse wind speed with the transmission distance according to an embodiment of the present invention. Among them, (a) is the distribution diagram of the collected atmospheric temperature with the transmission distance; (b) is the distribution of the collected transverse wind speed with the transmission distance; Figure 7 Shows the framework diagram of a system for establishing a calculation model of wide-spectrum beam thermal blooming distortion parameters according to an embodiment of the present invention; In the figure: 10. Acquisition module; 20. Calculation module. Detailed implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figure 1 shown, a method for establishing a calculation model of wide-spectrum beam thermal blooming distortion parameters according to an embodiment of the present invention includes: S1. Collect the first characteristic parameters of the wide-spectrum beam and the second characteristic parameters at different transmission distances along the optical path; S2. Complete the establishment of the calculation model of the wide-spectrum beam thermal blooming distortion parameters according to the first characteristic parameters of the wide-spectrum beam and the second characteristic parameters at different transmission distances along the optical path.

[0025] In some embodiments of the present invention, in step S1, the first characteristic parameters include the light source power spectral density, effective radius, diffraction limit multiple, and focal length; The second characteristic parameter includes an atmospheric absorption coefficient, an atmospheric extinction coefficient, and atmospheric temperature data.

[0026] In some embodiments of the present invention, the data of the effective radius and the diffraction limit multiple are measured by a beam quality analyzer, obtained from a light source manufacturing company, or set according to research needs.

[0027] In some embodiments of the present invention, the atmospheric absorption coefficient data is obtained by field experiments.

[0028] In some embodiments of the present invention, the atmospheric extinction coefficient is obtained by field experiments.

[0029] In some embodiments of the present invention, the atmospheric temperature data is obtained by field experiments.

[0030] In some embodiments of the present invention, step S2 includes: S2-1. Equivalent the broadband beam to a monochromatic light according to the source power spectral density of the broadband beam, and calculate the equivalent wavelength of the broadband beam; S2-2. Calculate the equivalent expansion radius at different transmission distances along the optical path according to the effective radius, diffraction limit multiple, and focal length of the broadband beam; S2-3. Calculate the equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to the atmospheric absorption coefficient at different transmission distances along the optical path; S2-4. Calculate the equivalent atmospheric transmittance at different transmission distances along the optical path according to the atmospheric extinction coefficient at different transmission distances along the optical path; S2-5. Establish a calculation model for the thermal blooming distortion parameters of the broadband beam according to the equivalent expansion radius, equivalent atmospheric absorption coefficient, equivalent atmospheric transmittance at different transmission distances along the optical path, and the equivalent wavelength of the broadband beam.

[0031] In some embodiments of the present invention, the calculation formula for the equivalent wavelength of the broadband beam is shown in Equation (1): (1) In Equation (1), is the equivalent wavelength of the broadband light speed, is the source power spectral density, and Equation (1) is obtained according to the principle of equivalent broadband beam to monochromatic light, is the maximum value of the power spectral distribution wavelength, is the minimum value of the power spectral distribution wavelength.

[0032] In some embodiments of the present invention, the calculation formula for the equivalent expansion radius at different transmission distances along the optical path is shown in Equation (2): (2) In Equation (2), is the equivalent expansion radius at different transmission distances along the optical path, is the effective radius of the broadband beam, is the diffraction limit multiple of the broadband beam, z is the laser transmission distance, L is the focal length.

[0033] In some embodiments of the present invention, the calculation formula of the equivalent atmospheric absorption coefficient at different transmission distances along the optical path is as shown in Equation (3): (3) In Equation (3), is the equivalent atmospheric absorption coefficient at different transmission distances along the optical path, is the transmission distance along the optical path z at which is the atmospheric absorption coefficient, is the transmission distance along the optical path s at which is the atmospheric extinction coefficient.

[0034] In some embodiments of the present invention, the calculation formula of the equivalent atmospheric transmittance at different transmission distances along the optical path is as shown in Equation (4): (4) In Equation (4), is the equivalent atmospheric transmittance at different transmission distances along the optical path, is the transmission distance along the optical path z at which is the atmospheric extinction coefficient.

[0035] In some embodiments of the present invention, the calculation formula corresponding to the calculation model of the thermal blooming distortion parameter of the broadband beam is as shown in Equation (5): (5) In Equation (5), is the thermal blooming distortion parameter of the broadband beam, is the transmission distance along the optical path z at which is the atmospheric temperature, is the transmission distance along the optical path z =0 at which is the atmospheric temperature, is the transverse wind speed, which is the vector sum of the atmospheric wind speed and the optical path rotation wind, is the equivalent wavelength of the broadband light speed, represents the refractive index relative temperature change rate, represents the atmospheric density, is the specific heat capacity of the atmospheric at constant pressure.

[0036] Using the steps S1 - S2 in the above embodiments, a calculation model for the thermal blooming distortion parameters is constructed, realizing the calculation of the thermal blooming distortion parameters of the broadband beam. Furthermore, the impact of the thermal blooming distortion parameters on the beam quality during the high - power laser transmission is evaluated, laying a foundation for simulating and numerically simulating the thermal blooming effect of high - power broadband laser atmospheric transmission in the laboratory. Specifically, the process data involved is as follows: Figure 2 The normalized power spectral density of the light source collected in the embodiment of the present invention shown Data (the normalized power spectral density is obtained by dividing the power spectral density by the maximum power). It can be seen that nanometers, nanometers. Multiply the normalized power spectral density value by the maximum power to obtain the power spectral density Measured data. Substitute this measured data into Equation (1) to obtain the equivalent wavelength of the broadband beam as 1051.60 nanometers; Figure 3 In (a) shows the effective radius of the broadband beam collected in the embodiment of the present invention Data, Figure 3 In (b) shows the diffraction - limited multiple of the broadband beam collected in the embodiment of the present invention Data, focal length kilometers. Substitute these data into Equation (2) to obtain the equivalent expansion radius data at different transmission distances along the optical path. Specifically, see the curve in Figure 3 In (c); Figure 4 In (a) shows the atmospheric absorption coefficient at a transmission distance of 0.17 kilometers collected in the embodiment of the present invention, Figure 4 In (b) shows the atmospheric absorption coefficient at a transmission distance of 1.00 kilometers collected in the embodiment of the present invention, Figure 4 In (c) shows the atmospheric absorption coefficient at a transmission distance of 3.39 kilometers collected in the embodiment of the present invention. Substitute these data into Equation (3) to calculate the equivalent atmospheric absorption coefficient. Specifically, the distribution of the equivalent atmospheric absorption coefficient calculated in the embodiment of the present invention with the transmission distance is as shown in Figure 4 In (d); Figure 5 In (a) shows the atmospheric extinction coefficient at a transmission distance of 0.17 kilometers collected in the embodiment of the present invention, Figure 5 In (b) shows the atmospheric extinction coefficient at a transmission distance of 1.00 kilometers collected in the embodiment of the present invention, Figure 5 In (c) shows the atmospheric extinction coefficient at a transmission distance of 3.39 kilometers collected in the embodiment of the present invention. Substitute these data into Equation (4) to calculate the equivalent atmospheric transmittance. Specifically, the distribution of the equivalent atmospheric transmittance calculated in the embodiment of the present invention with the transmission distance is as shown in Figure 5 In (d); Figure 6 In (a) shows the distribution data of the atmospheric temperature collected in the embodiment of the present invention with the transmission distance, Figure 6 In (b) shows the distribution data of the lateral wind speed collected in the embodiment of the present invention with the transmission distance. The calculated equivalent wavelength, equivalent expansion radius data, equivalent atmospheric absorption coefficient, and equivalent atmospheric transmittance are constructed into Equation (5), which is the calculation model of the thermal blooming distortion parameter of the broadband beam. Running Equation (5), the thermal blooming distortion parameter of the broadband beam is calculated, and the specific thermal blooming distortion parameter is 34.36.

[0037] A method for calculating the thermal blooming distortion parameter of a broadband beam according to some embodiments of the present invention includes: The calculation model (i.e., Equation (5)) in the above embodiments calculates the thermal blooming distortion parameter of the broadband beam according to the first characteristic parameters of the broadband beam (the first characteristic parameters include the light source power spectral density, effective radius, diffraction limit multiple, and focal length), and the second characteristic parameters at different transmission distances along the optical path (the second characteristic parameters include the atmospheric absorption coefficient, atmospheric extinction coefficient, and atmospheric temperature data).

[0038] In the embodiment of the present invention, the calculation process involved also refers to the calculations of Equations (1)-(4) in the above embodiments.

[0039] As Figure 7 shown, a system for establishing a calculation model of the thermal blooming distortion parameter of a broadband beam according to some embodiments of the present invention includes a collection module 10 and a calculation module 20: The collection module 10: is used to collect the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path; The calculation module 20: is used to establish a calculation model of the thermal blooming distortion parameter of the broadband beam according to the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path.

[0040] In some embodiments of the present invention, the calculation module 20 includes a first sub-module, a second sub-module, a third sub-module, a fourth sub-module, and a fifth sub-module; The first sub-module is used to equivalent the broadband beam to a monochromatic light according to the light source power spectral density of the broadband beam and calculate the equivalent wavelength of the broadband beam; The second sub-module is used to calculate the equivalent expansion radius at different transmission distances along the optical path according to the effective radius, diffraction limit multiple, and focal length of the broadband beam; The third sub-module is used to calculate the equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to the atmospheric absorption coefficient at different transmission distances along the optical path; The fourth sub-module is used to calculate the equivalent atmospheric transmittance at different transmission distances along the optical path according to the atmospheric extinction coefficients at different transmission distances along the optical path; The fifth sub-module is used to establish a calculation model for the thermal blooming distortion parameters of the broadband beam according to the equivalent extended radius, equivalent atmospheric absorption coefficient, equivalent atmospheric transmittance at different transmission distances along the optical path, and the equivalent wavelength of the broadband beam.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for establishing a calculation model of thermal blooming distortion parameters of a wide-spectrum light beam, characterized in that, including: collecting the first characteristic parameters of a broadband beam and the second characteristic parameters at different transmission distances along the optical path; establishing a calculation model for the thermal blooming distortion parameters of the broadband beam according to the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path.

2. The method for establishing a calculation model of the thermal blooming distortion parameters of a wide-spectrum light beam according to claim 1, characterized in that The first characteristic parameters include the source power spectral density, the effective radius, the diffraction limit multiple, and the focal length; The second characteristic parameters include the atmospheric absorption coefficient, the atmospheric extinction coefficient, and the atmospheric temperature data.

3. The method for establishing a calculation model of wide-spectrum beam thermal blooming distortion parameters according to claim 1, characterized in that The establishing of the calculation model for the thermal blooming distortion parameters of the broadband beam according to the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path includes: equivalent the broadband beam to a monochromatic light according to the source power spectral density of the broadband beam and calculate the equivalent wavelength of the broadband beam; calculate the equivalent expansion radius at different transmission distances along the optical path according to the effective radius, the diffraction limit multiple, and the focal length of the broadband beam; calculate the equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to the atmospheric absorption coefficient at different transmission distances along the optical path; calculate the equivalent atmospheric transmittance at different transmission distances along the optical path according to the atmospheric extinction coefficient at different transmission distances along the optical path; establish a calculation model for the thermal blooming distortion parameters of the broadband beam according to the equivalent expansion radius, the equivalent atmospheric absorption coefficient, the equivalent atmospheric transmittance at different transmission distances along the optical path, and the equivalent wavelength of the broadband beam.

4. The method for establishing a calculation model of broadband beam thermal blooming distortion parameters according to claim 3, characterized in that The calculation formula for the equivalent expansion radius at different transmission distances along the optical path is as follows: Among them, is the equivalent expansion radius at different transmission distances along the optical path, is the effective radius of the broadband beam, is the diffraction limit multiple of the broadband beam, is the source power spectral density, z is the laser transmission distance, L is the focal length, is the maximum value of the wavelength of the power spectral distribution, is the minimum value of the wavelength of the power spectral distribution.

5. The method for establishing a calculation model of the thermal blooming distortion parameters of a broadband beam, according to claim 3, is characterized in that The calculation formula for the equivalent atmospheric absorption coefficient at different transmission distances along the optical path is as follows: Among them, is the equivalent atmospheric absorption coefficient at different transmission distances along the optical path, is the transmission distance along the optical path z at which is the atmospheric absorption coefficient, is the transmission distance along the optical path s at which is the atmospheric extinction coefficient.

6. The method for establishing a calculation model of wide-spectrum beam thermal blooming distortion parameters according to claim 3, characterized in that, The calculation formula for the equivalent atmospheric transmittance at different transmission distances along the optical path is as follows: Among them, is the equivalent atmospheric transmittance at different transmission distances along the optical path, is the transmission distance along the optical path z and is the atmospheric extinction coefficient at that location.

7. A method for establishing a calculation model of the thermal blooming distortion parameters of a broadband beam, characterized in that, according to any one of claims 1-6 The calculation formula corresponding to the calculation model for the thermal blooming distortion parameters of the broadband beam is as follows: Among them, is the thermal blooming distortion parameter of the broadband beam, is the transmission distance along the optical path z at the atmospheric temperature, is the transmission distance along the optical path z =0 at the atmospheric temperature, is the crosswind speed, which is the vector sum of the atmospheric wind speed and the optical path rotation wind, is the equivalent wavelength of the broadband light speed, represents the relative temperature change rate of the refractive index, represents the atmospheric density, is the specific heat capacity of the atmosphere at constant pressure.

8. A calculation method for the thermal blooming distortion parameters of a wide-spectrum light beam, characterized in that, including: the calculation model calculates the thermal blooming distortion parameters of the broadband beam according to the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path; the calculation model is established by the establishing method described in any one of claims 1-7.

9. A system for establishing a calculation model of thermal blooming distortion parameters of a wide-spectrum light beam, characterized in that, including a collection module and a calculation module: The collection module: is used to collect the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path; The calculation module: is used to establish a calculation model for the thermal blooming distortion parameters of the broadband beam according to the first characteristic parameters of the broadband beam and the second characteristic parameters at different transmission distances along the optical path.

10. The system for establishing a calculation model of broadband beam thermal blooming distortion parameters according to claim 9, characterized in that, The calculation module includes a first sub-module, a second sub-module, a third sub-module, a fourth sub-module, and a fifth sub-module; The first sub-module is used to equivalent the broadband beam to a monochromatic light according to the source power spectral density of the broadband beam and calculate the equivalent wavelength of the broadband beam; The second sub-module is used to calculate the equivalent expansion radius at different transmission distances along the optical path according to the effective radius, the diffraction limit multiple, and the focal length of the broadband beam; The third sub-module is used to calculate the equivalent atmospheric absorption coefficient at different transmission distances along the optical path according to the atmospheric absorption coefficient at different transmission distances along the optical path; The fourth sub-module is used to calculate the equivalent atmospheric transmittance at different transmission distances along the optical path according to the atmospheric extinction coefficient at different transmission distances along the optical path; The fifth sub-module is used to establish a calculation model for the thermal blooming distortion parameters of the broadband beam based on the equivalent extended radius, equivalent atmospheric absorption coefficient, equivalent atmospheric transmittance at different transmission distances along the optical path, and the equivalent wavelength of the broadband beam.

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