Method for regulating transmission of polychromatic random electromagnetic lorentz correlated light beams

Abstract

The application discloses a method for regulating and controlling the transmission of a multicolor random electromagnetic Lorentz correlation light beam, which comprises the following steps: based on a Lorentz type partial coherence function and a random electromagnetic beam cross-spectral density matrix, a cross-spectral density matrix element of the multicolor random electromagnetic Lorentz correlation light beam is constructed on an initial plane. Then, in a free space transmission model, the cross-spectral density matrix element at an arbitrary position is derived, and further, an expression of the light intensity and the degree of polarization at a transmission distance z is obtained. By setting initial parameters and the transmission distance, the spectral frequency shift and the degree of polarization characteristics of the light beam can be effectively regulated and controlled. The method provides a new idea for the regulation and control of the light beam transmission in a complex medium and has application value in the fields of optical communication and imaging. The application expands the Lorentz type correlation structure to the vector field, realizes the joint regulation and control of the polarization state and the correlation structure, and overcomes the problem of single light intensity distribution form of the traditional Gaussian Schell model light beam, thereby providing a new type of light field resource for polarization sensitive applications.

Description

Technical Field

[0001] This invention relates to the field of optical transmission technology, and in particular to a method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams. Background Technology

[0002] In recent years, laser technology has been widely used in optical communication, remote sensing, and monitoring. In practical applications, laser beams often have a certain spectral width, rather than being ideal monochromatic light. Research shows that when considering the multicolor characteristics of lasers, fully spatially coherent and partially spatially coherent multicolor light will exhibit spectral shift (i.e., frequency shift) with increasing transmission distance under certain conditions. This characteristic has broad prospects in applications such as spectral switching.

[0003] Polarization, as a fundamental property of light beams, has significant application value in the vector manipulation of light beams. Traditional Gaussian-Sherlock (GSM) partially coherent beams exhibit a single Gaussian intensity distribution during propagation, and their manipulation methods are limited by the Gaussian correlation structure. In contrast, Lorentz-correlated sources can generate a sharper Lorentz-correlated intensity distribution, overcoming the limitations of the Gaussian intensity distribution. However, current optical field manipulation techniques can only generate scalar-form Lorentz-correlated beams and have not yet achieved controllable manipulation of the polarization state.

[0004] Currently, the technical solutions for extending Lorentz correlation properties to vector beams and introducing them into spectral modulation still have significant shortcomings: First, the lack of effective means to generate Lorentz correlation beams with controllable polarization states limits their potential in polarization-sensitive applications (such as precision measurement and quantum information processing). Secondly, existing technologies cannot simultaneously take into account the Lorentz correlation characteristics, multicolor spectral characteristics, and vector polarization characteristics of a light beam, resulting in a single form of light field manipulation that cannot meet the needs of complex application scenarios.

[0005] Therefore, there is an urgent need for a new type of beam generation and control that can integrate Lorentz correlation characteristics, polarization modulation, and spectral characteristics to overcome the limitations of traditional GSM source beams and promote the further development of laser technology in fields such as optical communication and remote sensing. Summary of the Invention

[0006] This invention provides a method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams to overcome the aforementioned technical problems.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A method for controlling the propagation of multicolor random electromagnetic Lorentz correlated beams includes: S1: Introduce the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function to obtain the matrix elements of the cross-spectral density on the initial plane for constructing the multicolor random electromagnetic Lorentz-correlated beam, thereby forming a multicolor random electromagnetic Lorentz-correlated beam containing multiple matrix elements. S2: In free space, a multicolor random electromagnetic Lorentz correlated beam is introduced to obtain the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any position. S3: Based on the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any location, obtain the expression for the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance; S4: Set the initial parameters and transmission distance of the multicolor random electromagnetic Lorentz correlation beam, adjust the parameters of the multicolor random electromagnetic Lorentz correlation beam, and realize the control of the spectral frequency shift and polarization degree of the multicolor random electromagnetic Lorentz correlation beam.

[0008] Furthermore, the cross-spectral density matrix of the random electromagnetic beam and the Lorentz correlation function are introduced to obtain the matrix elements of the cross-spectral density of the Lorentz beam on the initial plane, including: S11. Introduce the cross-spectral density matrix of the random electromagnetic beam, as shown in formulas (1) and (2). (1) (2) in, For cross-spectral density matrix elements, and The position vector at the source plane; symbol Indicates complex conjugation; and They represent along direction and The electric field vector in the direction; Introducing a Lorentz-type partial coherence function, as shown in equation (3), (3) in, Indicates the coherence width; S12. Construct the matrix elements of the cross-spectral density of a multicolor random electromagnetic Lorentz beam based on the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function, as shown in formulas (4) and (5). (4) (5) in, and For amplitude, Correlation coefficient hour , hour , For the source spectrum, For waist width, For coherence width, It is the angular frequency. The center frequency of the spectrum, Spectral width.

[0009] Furthermore, in free space, a multicolor random electromagnetic Lorentz correlated beam is introduced to obtain the cross-spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam at any location, including: S21. Introduce the cross-spectral density of partially coherent light, as shown in formula (6). (6) in, This represents the cross-spectral density of partially coherent light at any distance z. and Let z be the position vector at any position. It is the wave number. It's the wavelength. Represents the imaginary unit; S22. Substituting formula (4) into formula (6), we obtain the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any transmission position z, as shown in formula (7). (7) in, Describe the Lorentz expansion series. and They represent direction and The summation index of the Lorentz expansion series. express Lorentz expansion coefficients in the direction, express Lorentz expansion coefficients in the direction, The part representing the cross spectral density Quantity, The part representing the cross spectral density The components are as follows: (8) (9) In the formula, , , These are intermediate variables in the calculation process, as shown in formulas (10)-(12). (10) (11) (12).

[0010] Furthermore, based on the cross spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam at any location, expressions for the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance are obtained, including: when At that time, the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance z in free space are shown in formulas (13) and (14). (13) (14) in, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix elements, as shown in (15)-(18), (15) (16) (17) (18) In the formula, , , These are intermediate variables in the calculation process, as shown in formulas (19)-(21). (19) (20) (twenty one).

[0011] Furthermore, by setting the initial parameters and transmission distance of the multicolor random electromagnetic Lorentz correlated beam, and adjusting the parameters of the multicolor random electromagnetic Lorentz correlated beam, the spectral frequency shift and polarization degree of the multicolor random electromagnetic Lorentz correlated beam can be controlled, including: Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , and The value of is adjusted by regulating the spectral frequency shift by changing the transmission distance; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , Adjusting the value of transmission distance z and The value can be used to control the spectral frequency shift; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , , , and The value of is adjusted from small to large to control the degree of polarization; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , , and The value is adjusted from small to large to control the transmission distance. = The polarization degree of a multicolor random electromagnetic Lorentz correlated beam is controlled.

[0012] Beneficial effects: This invention provides a method for controlling the propagation of multicolor random electromagnetic Lorentz correlated beams, which has the following advantages: 1. By introducing the cross-spectral density matrix and Lorentz-type partial coherence function of a random electromagnetic beam, a multicolor random electromagnetic beam possessing both Lorentz correlation characteristics and controllable polarization state is constructed. This invention extends the Lorentz-type correlation structure to the vector domain, realizing the joint control of polarization state and correlation structure, overcoming the problem of the single intensity distribution pattern of beams in the traditional Gauss-Schwarz model (GSM), and providing a novel optical field resource for polarization-sensitive applications (such as quantum communication and polarization-coded imaging). 2. By setting beam parameters and transmission distance, this invention can actively adjust the spectral frequency shift characteristics and polarization degree distribution of a multicolor random electromagnetic Lorentz correlated beam, realizing the coordinated control of spectral characteristics (frequency shift) and vector characteristics (polarization degree). It can meet the needs of complex application scenarios such as spectral switching, polarization-coded communication, and multi-parameter sensing for multi-functional control of the light field.

[0013] 3. This invention can accurately calculate the light intensity, polarization degree, and spectral characteristics at any transmission distance, providing a theoretical tool for the engineering design and performance verification of light beams. This model breaks through the transmission characteristic limitations of traditional GSM beams, achieving a sharper light intensity distribution through a Lorentz-type correlation structure. Simultaneously, by combining multicolor characteristics and vector control, it significantly improves the controllability and adaptability of the beam during free-space transmission. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A flowchart of a method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams provided by the present invention; Figure 2 This is a schematic diagram of the normalized light intensity distribution curves of a multicolor random electromagnetic Lorentz correlated beam at different transmission distances. Figure 3 For multicolor random electromagnetic Lorentz correlated beams with different coherence lengths at different transmission distances A schematic diagram of the normalized light intensity distribution curve; Figure 4 A schematic diagram of the frequency shift of an on-axis point in a multicolor random electromagnetic Lorentz correlated beam as a function of transmission distance; Figure 5 They are different A schematic diagram of the on-axis point polarization degree of a multicolor random electromagnetic Lorentz correlated beam as a function of transmission distance; Figure 6 They are different and A schematic diagram of the on-axis point polarization degree of a multicolor random electromagnetic Lorentz correlated beam as a function of transmission distance; Figure 7 This is a schematic diagram showing the variation of the on-axis point polarization degree of a multicolor random electromagnetic Lorentz correlated beam with transmission distance under different coherence lengths. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] A method for controlling the propagation of multicolor random electromagnetic Lorentz correlated beams includes: S1: Introduce the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function to obtain the matrix elements of the cross-spectral density on the initial plane for constructing the multicolor random electromagnetic Lorentz-correlated beam, thereby forming a multicolor random electromagnetic Lorentz-correlated beam containing multiple matrix elements. S2: In free space, a multicolor random electromagnetic Lorentz correlated beam is introduced to obtain the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any position. S3: Based on the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any location, obtain the expression for the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance; S4: Set the initial parameters and transmission distance of the multicolor random electromagnetic Lorentz correlation beam, adjust the parameters of the multicolor random electromagnetic Lorentz correlation beam, and realize the control of the spectral frequency shift and polarization degree of the multicolor random electromagnetic Lorentz correlation beam.

[0018] Specifically, this invention discloses a method for controlling the transmission of a multicolor random electromagnetic Lorentz correlated beam. First, the cross-spectral density matrix of the random electromagnetic beam and a Lorentz-type partial coherence function are introduced to obtain matrix elements on an initial plane for constructing the multicolor random electromagnetic Lorentz correlated beam, thus forming a multicolor random electromagnetic Lorentz correlated beam containing multiple matrix elements. Second, in free space, based on the cross-spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam, the cross-spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance are obtained. Based on the cross-spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam, expressions for the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance are determined. Finally, by adjusting the parameters of the multicolor Lorentz correlated beam and the transmission distance, light fields with different frequency shifts and polarization degrees are obtained, achieving the control of frequency shift and polarization degree. This invention can effectively control the frequency shift and polarization degree of the multicolor random electromagnetic Lorentz correlated beam.

[0019] In a specific embodiment, the scheme of introducing the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function to obtain the matrix elements of the cross-spectral density on the initial plane for constructing the multicolor random electromagnetic Lorentz correlated beam, thereby forming a multicolor random electromagnetic Lorentz correlated beam containing multiple matrix elements, is as follows: S11. Introduce the cross-spectral density matrix of the random electromagnetic beam, as shown in formulas (22) and (23). (twenty two) (twenty three) in, For cross-spectral density matrix elements, and The position vector at the source plane; symbol Indicates complex conjugation; and They represent along direction and The electric field vector in the direction; Introducing a Lorentz-type partial coherence function, as shown in equation (24), (twenty four) in, Indicates the coherence width; S12. Construct the matrix elements of the cross-spectral density of a multicolor random electromagnetic Lorentz beam based on the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function, as shown in formulas (25) and (26). (25) (26) in, and For amplitude, Correlation coefficient hour , hour , For the source spectrum, For waist width, For coherence width, It is the angular frequency. The center frequency of the spectrum, Spectral width.

[0020] In this scheme, the Lorentz-type correlation structure is combined with the cross spectral density matrix of the random electromagnetic beam to construct an initial light field containing multicolor spectral characteristics and vector polarization characteristics. This lays the foundation for the subsequent generation of a novel beam with Lorentz-type sharp distribution, controllable polarization, and spectral frequency shift characteristics. It overcomes the limitations of traditional techniques such as "scalar beam without polarization control" and "single correlation structure", and provides a systematic solution for the construction of multicolor random electromagnetic Lorentz correlation beams.

[0021] In a specific embodiment, the scheme for introducing a multicolor random electromagnetic Lorentz correlated beam in free space to obtain the cross spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam at any location is as follows: S21. Introduce the cross-spectral density of partially coherent light, as shown in formula (27). (27) in, This represents the cross-spectral density of partially coherent light at any distance z. and Let z be the position vector at any position. It is the wave number. It's the wavelength. Represents the imaginary unit; S22. Substituting formula (25) into formula (27), we obtain the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any transmission position z, as shown in formula (28). (28) in, Describe the Lorentz expansion series. and They represent direction and The summation index of the Lorentz expansion series. express Lorentz expansion coefficients in the direction, express Lorentz expansion coefficients in the direction, The part representing the cross spectral density Quantity, The part representing the cross spectral density The components are as follows: (29) (30) In the formula, , , These are intermediate variables in the calculation process, as shown in formulas (31)-(33). (31) (32) (33).

[0022] Existing transmission models are mostly designed for scalar beams or Gaussian correlated vector beams, lacking analytical descriptions of Lorentz correlated vector beams and failing to simultaneously characterize the co-evolution of multicolor spectral and polarization properties. This scheme establishes an analytical transmission model for multicolor random electromagnetic Lorentz correlated beams in free space based on cross-spectral density matrix elements. It can accurately calculate the correlation characteristics, polarization state, and spectral parameters of the light field at any location, providing theoretical support for subsequent quantitative analysis of light intensity, degree of polarization, and spectral frequency shift. This overcomes the problems of "incomplete transmission models" and "inability to co-describe multi-parameter evolution" in traditional techniques, achieving accurate prediction of beam transmission characteristics.

[0023] In a specific embodiment, the scheme for obtaining the expressions for the light intensity and polarization degree of a multicolor random electromagnetic Lorentz correlated beam at an arbitrary transmission distance based on the cross spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam at any location is as follows: when At that time, the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance z in free space are shown in formulas (34) and (35). (34) (35) in, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix elements, as shown in (36)-(39), (36) (37) (38) (39) In the formula, , , These are intermediate variables in the calculation process, as shown in formulas (40)-(42). (40) (41) (42).

[0024] Traditional studies often analyze light intensity or polarization independently without establishing a correlation model between the two and spectral frequency shift, and rely on numerical simulation or empirical control. This scheme, through analytical expressions, directly correlates light intensity distribution, polarization degree with transmission distance and spectral frequency shift characteristics, realizing the synergistic quantitative analysis of multi-parameter transmission characteristics. This provides a clear mathematical basis for subsequent active control and significantly improves the efficiency and accuracy of beam design.

[0025] In a specific embodiment, the scheme for controlling the spectral frequency shift and polarization degree of a multicolor random electromagnetic Lorentz correlated beam by setting the initial parameters and transmission distance, and adjusting the parameters of the multicolor random electromagnetic Lorentz correlated beam is as follows: Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , and The value of is adjusted by regulating the spectral frequency shift by changing the transmission distance; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , Adjusting the value of transmission distance z and The value can be used to control the spectral frequency shift; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , , , and The value of is adjusted from small to large to control the degree of polarization; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , , and The value is adjusted from small to large to control the transmission distance. = The polarization degree of a multicolor random electromagnetic Lorentz correlated beam is controlled.

[0026] This scheme achieves multi-parameter coordinated control of spectral frequency shift, polarization degree, and light intensity distribution by setting beam parameters and transmission distance. It overcomes the limitations of traditional technologies such as "single control method" and "unchangeable associated structure", and provides a flexible and efficient optical field control scheme for applications such as spectral switching and polarization-coded communication.

[0027] Example 1: The parameters are selected as follows , , , , Adjusting the value of z yields the normalized intensity distribution curves of the multicolor random electromagnetic Lorentz correlated beam at different transmission distances, as shown below. Figure 2 As shown, the values ​​of z are 50m and 150m, respectively. It can be seen that the spectrum will shift with the increase of transmission distance.

[0028] Example 2: Parameter selection is as follows , , , ,Adjustment and The values ​​were obtained to obtain the propagation distance of multicolor random electromagnetic Lorentz correlated beams with different coherence lengths. The normalized light intensity distribution curve, such as Figure 3 As shown in the figure, the coherence lengths are respectively , and As can be seen, the spectrum of the multicolor random electromagnetic Lorentz correlated beam also undergoes frequency shift as the coherence length changes.

[0029] Example 3: Parameter selection is as follows , , , , By adjusting the value of z, the curve of the on-axis point frequency shift of the multicolor random electromagnetic Lorentz correlated beam as a function of transmission distance is obtained, as shown below. Figure 4 As shown in the figure, the frequency shift gradually increases with the increase of transmission distance. Therefore, by controlling the transmission distance and coherence length, different frequency shifts in the beam spectrum can be obtained.

[0030] Example 4: Parameter selection is as follows , , , , , , ,Adjustment The values ​​of z and z yield different results. The curve showing the variation of the on-axis point polarization degree of a multicolor random electromagnetic Lorentz correlated beam with propagation distance, as shown in the figure. Figure 5 As shown in the figure, the vertical axis represents the degree of polarization. It can be seen from the figure that as the transmission distance z increases, the degree of polarization of the beam will gradually increase.

[0031] Example 5: Parameter selection is as follows , , , , , ;Adjustment and The value of is used to obtain the curve of the on-axis point polarization degree of the multicolor random electromagnetic Lorentz correlated beam as a function of transmission distance, as shown in the figure. Figure 6 As shown, it can be seen that and This will affect the initial value of the initial polarization degree, and as the transmission distance increases, the polarization degree on the beam axis will gradually increase.

[0032] Example 6: Parameter selection is as follows , , , , , By setting different coherence lengths and adjusting the value of z, the curves showing the variation of on-axis point polarization degree of a multicolor random electromagnetic Lorentz correlated beam with transmission distance under different coherence lengths are obtained, such as... Figure 7 As shown in the figure, the degree of polarization will be controlled by the coherence length at different transmission distances.

[0033] Therefore, by controlling the transmission distance and coherence length, the parameters and The polarization degree of the multicolor random electromagnetic Lorentz correlated beam can be adjusted.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams, characterized in that, include: S1: Introduce the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function to obtain the matrix elements of the cross-spectral density on the initial plane for constructing a multicolor random electromagnetic Lorentz-correlated beam, thereby forming a multicolor random electromagnetic Lorentz-correlated beam containing multiple matrix elements; the specific steps include: S11. Introduce the cross-spectral density matrix of the random electromagnetic beam, as shown in formulas (1) and (2). （1） （2） in, For cross-spectral density matrix elements, and The position vector at the source plane; symbol Indicates complex conjugation; and They represent along direction and The electric field vector in the direction; Introducing a Lorentz-type partial coherence function, as shown in equation (3), （3） in, Indicates the coherence width; S12. Construct the matrix elements of the cross-spectral density of a multicolor random electromagnetic Lorentz beam based on the cross-spectral density matrix of the random electromagnetic beam and the Lorentz-type partial coherence function, as shown in formulas (4) and (5). （4） （5） in, and For amplitude, Correlation coefficient hour , hour , For the source spectrum, For waist width, For coherence width, It is the angular frequency. The center frequency of the spectrum, Spectral width; S2: In free space, a multicolor random electromagnetic Lorentz correlated beam is introduced to obtain the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any position. S3: Based on the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any location, obtain the expression for the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance; S4: Set the initial parameters and transmission distance of the multicolor random electromagnetic Lorentz correlation beam, adjust the parameters of the multicolor random electromagnetic Lorentz correlation beam, and realize the control of the spectral frequency shift and polarization degree of the multicolor random electromagnetic Lorentz correlation beam.

2. The method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams according to claim 1, characterized in that, In free space, a multicolor random electromagnetic Lorentz correlated beam is introduced, and the cross-spectral density matrix elements of the multicolor random electromagnetic Lorentz correlated beam at any location are obtained, including: S21. Introduce the cross-spectral density of partially coherent light, as shown in formula (6). （6） in, This represents the cross-spectral density of partially coherent light at any distance z. and Let z be the position vector at any position. It is the wave number. It's the wavelength. Represents the imaginary unit; S22. Substituting formula (4) into formula (6), we obtain the cross spectral density matrix element of the multicolor random electromagnetic Lorentz correlated beam at any transmission position z, as shown in formula (7). （7） in, Describe the Lorentz expansion series. and They represent direction and The summation index of the Lorentz expansion series. express Lorentz expansion coefficients in the direction, express Lorentz expansion coefficients in the direction, The part representing the cross spectral density Quantity, The part representing the cross spectral density The components are as follows: （8） （9） In the formula, , , These are intermediate variables in the calculation process, as shown in formulas (10)-(12). （10） （11） （12）。 3. The method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams according to claim 2, characterized in that, Based on the cross spectral density matrix elements of a multicolor random electromagnetic Lorentz correlated beam at any location, expressions for the intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance are obtained, including: when At that time, the light intensity and polarization degree of the multicolor random electromagnetic Lorentz correlated beam at any transmission distance z in free space are shown in formulas (13) and (14). （13） （14） in, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix element, Represents a multicolor random electromagnetic Lorentz correlated beam Matrix elements, as shown in (15)-(18), （15） （16） （17） （18） In the formula, , , These are intermediate variables in the calculation process, as shown in formulas (19)-(21). （19） （20） （21）。 4. The method for controlling the transmission of multicolor random electromagnetic Lorentz correlated beams according to claim 3, characterized in that, The initial parameters and propagation distance of a multicolor random electromagnetic Lorentz correlated beam are set, and the parameters of the multicolor random electromagnetic Lorentz correlated beam are adjusted to achieve the control of the spectral frequency shift and polarization degree of the multicolor random electromagnetic Lorentz correlated beam, including: Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , and The value of is adjusted by regulating the spectral frequency shift by changing the value of the transmission distance; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , Adjusting the value of transmission distance z and The value can be used to control the spectral frequency shift; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , , , and The value of is adjusted from small to large to control the degree of polarization; Setting parameters for multicolor random electromagnetic Lorentz correlated beams , , , , , and The value is adjusted from small to large to control the transmission distance. = The polarization degree of a multicolor random electromagnetic Lorentz correlated beam is controlled.

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