Linked list-based multi-beam coherent and incoherent combined transmission simulation method and system

Abstract

The present invention discloses a linked list-based multi-beam coherent and incoherent composite transmission simulation method and system, which relates to the field of optical simulation. The method stores the light field characteristic information of sub-beams through a series of nodes in the linked list, calculates the composite light field information through the correlation and incoherence theory of light beams and stores it as a new node. In this way, the nodes can be dynamically generated at runtime to realize the simulation of multi-beam transmission.

Description

Technical Field

[0001] The present invention relates to the field of optical simulation, and in particular to a linked list-based multi-beam coherent and incoherent composite transmission simulation method and system. Background Art

[0002] To achieve high power, high beam quality, or better uniformity, multiple beams are typically combined. There are two main methods: coherent combining and incoherent combining. Coherent combining produces a high-power beam by combining multiple beams. The beams must be consistent in frequency, phase, and polarization, allowing them to interfere with each other. Incoherent combining, on the other hand, achieves intensity superposition by arranging and combining multiple beams. This increases the uniformity and stability of multi-beam illumination when used for lighting.

[0003] Coherent and incoherent combining of multiple beams are both essential technical means. When designing beam combining arrangements and conducting transmission analysis, it is very necessary to analyze the results of coherent and incoherent combining transmission of multiple beams through simulation. Summary of the Invention

[0004] The purpose of the present invention is to propose a linked list-based multi-beam coherent and incoherent composite transmission simulation method and system, which uses a series of nodes in the linked list to store the light field characteristic information of the sub-beams, and calculates the composite light field information through the correlation and incoherence theory of the light beams and stores it as a new node. In this way, the nodes can be dynamically generated at runtime to realize the simulation of multi-beam transmission.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A linked list-based multi-beam coherent and incoherent combined transmission simulation method comprises the following steps:

[0007] 1) Define a data class representing the characteristics of the sub-beam light field. The data class includes member variables and a next pointer pointing to the next node. The member variables contain the amplitude, phase, wavelength, aperture, power, beam quality and coordinate position information of the sub-beam light field;

[0008] 2) The data class information of each sub-beam is stored in the same linked list in the form of nodes. The sub-beam with problems is deleted by deleting the node, and the sub-beam is added by adding the node;

[0009] 3) When the sub-beams in each node are transmitted to a specific position according to their light field characteristics, if the coherence condition is met, they are superimposed according to the optical coherence theory to obtain a composite beam; if the coherence condition is not met, they are superimposed according to the optical incoherence theory to obtain a composite light velocity; the composite light velocity after superposition is added as a new node in the form of the data class to the last position of the entire linked list for storage, thereby realizing multi-beam transmission simulation.

[0010] Preferably, each node in the linked list has independent sub-beam data type information and does not interfere with each other.

[0011] Preferably, in step 3), during the light field transmission and superposition calculation of the nodes, the operation is performed by judging whether the next pointer in the node is empty, and the light fields in all nodes are transmitted and simulated in sequence until the next pointer is empty.

[0012] A linked list-based multi-beam coherent and incoherent synthesis transmission simulation system comprises a memory and a processor. A computer program is stored in the memory, and the processor implements the steps of the above method when executing the program.

[0013] The beneficial effects of the present invention are:

[0014] This method implements multi-beam coherent and incoherent combined transmission simulation based on a linked list. It can dynamically increase or decrease the number of beams and facilitates the storage and transmission of beams after coherent or incoherent combination, facilitating flexible multi-beam combination and transmission simulation analysis. The linked list has no limit on the number of beams and can be set based on the computing and storage capabilities of the computing device. Therefore, this method is applicable even for simulations involving hundreds or thousands of beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Intended for multi-beam chains;

[0016] Figure 2 Delete a node from the multi-beam linked list;

[0017] Figure 3 Add a node to the back end of the multi-beam linked list;

[0018] Figure 4 It is 8 Gaussian-based laser beams arranged in a ring;

[0019] Figure 5 is a linked list of eight Gaussian laser beams and the synthetic light field;

[0020] Figure 6 is the intensity distribution of the transmitted light field after coherent combination;

[0021] Figure 7 It is the intensity distribution of the transmitted light field after incoherent combination. DETAILED DESCRIPTION

[0022] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description.

[0023] The present invention provides a linked list-based multi-beam coherent and incoherent composite transmission simulation method, which is specifically described as follows:

[0024] First, define a data class class lightField that represents the characteristics of the sub-beam light field. The member variables defined in the structure of this data class contain various information in the light field: amplitude, phase, wavelength, aperture, power, beam quality, coordinate position, etc. It also includes a pointer next to the next node, such as Figure 1 shown.

[0025] Secondly, the information of each sub-beam (i.e., data class information) is stored in the same linked list in the form of a node. Each element in the linked list is called a node, and each node is implemented in the form of a data class. A linked list is a non-continuous, non-sequential storage structure commonly used on a physical storage unit. The logical order of data elements is achieved through the order of pointer links in the linked list. Each node consists of two parts: one is the data field for storing data elements, which stores various information in the light field, including amplitude, phase, wavelength, aperture, power, beam quality, position information, etc.; the other is the pointer field for storing the address of the next node. If a problem occurs in a certain sub-beam, it can be deleted from the node in time, such as Figure 2 As shown; if you want to increase the sub-beam, you can also achieve it by adding nodes, such as Figure 3 shown.

[0026] Finally, based on the principle of independent propagation of light, the light beam in each node is transmitted according to the light field characteristics of its own light beam. After being transmitted to a specific location, if the coherence condition is met, the synthetic light beam is superimposed according to the theory of optical coherence; if the coherence condition is not met, the synthetic light beam is superimposed according to the theory of optical incoherence; the synthetic light field after superposition is added as a new node to the end of the entire linked list for storage.

[0027] It can be seen that the method of the present invention can flexibly realize the coherent and incoherent synthesis of multiple beams of various light waves and the simulation calculation of beam transmission. It is very clear in logic, simple in algorithm, and very convenient to implement and use.

[0028] The optical coherence theory and optical incoherence theory described in the method of the present invention are two aspects of the coherent superposition principle of light fields, and are specifically described as follows:

[0029] According to the coherent superposition principle of light fields, the optical coherence theory is described as follows: when multiple sub-beams meet the coherence condition, their synthetic light field is the vector superposition of the complex amplitudes of the light fields of the multiple sub-beams, as shown in the following formula (1): represents the complex amplitude of the light field of the composite beam, represents the complex amplitude of the light field of the kth sub-beam, z is the transmission distance, t is the time, and n is the number of sub-beams.

[0030]

[0031] According to the coherent superposition principle of light fields, the optical incoherence theory is described as follows: when multiple sub-beams do not meet the coherence condition, their composite light field is the superposition of the light field intensities of multiple sub-beams, as shown in the following formula (2), where I represents the intensity of the composite light beam, and I k represents the light intensity of the kth sub-beam.

[0032]

[0033] In the method of the present invention, during the light field transmission calculation process, calculation is performed by judging whether the next pointer of the node is empty, and the light fields in all nodes are sequentially transmitted and simulated until the next pointer is empty.

[0034] Regarding the technical solution of the method of the present invention, a specific embodiment is given below:

[0035] like Figure 4 As shown, this embodiment calculates a transmission simulation of eight Gaussian-based laser beams arranged in a ring for coherent and incoherent combination. The parameters of each sub-beam are as follows:

[0036] Number of sub-lasers: 8;

[0037] The central wavelength of the laser is: 550 nanometers;

[0038] The power of each laser is: 5 mW;

[0039] The Gaussian beam waist radius of each laser is: 0.25 mm;

[0040] The light output diameter of each laser is: 1 mm;

[0041] The distance between each laser arrangement and the center point: 1.5 mm;

[0042] Each laser beam quality β factor: 1;

[0043] The entire emission interface size of the 8-beam laser arrangement is 5 mm.

[0044] Transmission conditions: Transmission distance 3 meters.

[0045] An observation card is placed at a distance of three meters. The observation card is 10 mm in size.

[0046] To calculate the transmission results of the eight sub-lasers combined into a multi-beam structure, according to the method of the present invention, a data class of sub-beam light field characteristics is first defined as follows:

[0047]

[0048] Construct a linked list consisting of eight nodes. Each node stores the information of each sub-beam, and the next pointer of each node points to the next node. Each beam is transmitted and calculated separately, and the superimposed light field after transmission is added to the back end of the linked list as a new node, such as Figure 5 shown.

[0049] When the eight sub-lasers meet the coherent superposition condition, they are coherent light, and the light field distribution after 3 meters of transmission is as follows: Figure 6 As shown in the figure, obvious coherent fringes are formed, with a bright spot maximum in the center. The maximum power density reaching the 3-meter target surface is 1.67 W / cm 2 .

[0050] When the eight sub-lasers do not meet the coherent superposition condition, they are incoherent light. The light field distribution after 3 meters of transmission is as follows: Figure 7 As shown, they are the sum of the light intensities reaching the target. No coherent fringes appear, and the maximum power density reaching the 3-meter target surface is 0.212 W / cm 2 .

[0051] It can be seen from the above embodiments that the technical solution of the present invention can simulate and analyze the coherent and incoherent composite transmission of any multiple light beams through a linked list, which is very flexible and convenient.

[0052] Some parts of the present invention are well known to those skilled in the art and are not described in detail.

[0053] Although the present invention has been disclosed as above by way of embodiments, they are not intended to limit the present invention. Any appropriate modification or equivalent substitution of the technical solution of the present invention by a person skilled in the art should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on that defined in the claims.

Claims

1. A linked list-based multi-beam coherent and incoherent combined transmission simulation method, characterized in that: The following steps are involved: 1) Define a data class representing the characteristics of the sub-beam light field. The data class includes member variables and a next pointer pointing to the next node. The member variables contain the amplitude, phase, wavelength, aperture, power, beam quality and coordinate position information of the sub-beam light field; 2) The data class information of each sub-beam is stored in the same linked list in the form of nodes. The sub-beam with problems is deleted by deleting the node, and the sub-beam is added by adding the node; 3) When the sub-beams in each node are transmitted to a specific location according to their light field characteristics, if the coherence condition is met, then the composite light field is the vector superposition of the complex amplitudes of the light fields of multiple sub-beams; if the coherence condition is not met, then the composite light field is the superposition of the light field intensities of multiple sub-beams; the composite light field of the composite light velocity after superposition is added as a new node in the form of the data class to the last position of the entire linked list for storage, thereby realizing multi-beam transmission simulation.

2. The method according to claim 1, wherein Each node in the linked list has independent sub-beam data type information and does not interfere with each other.

3. The method according to claim 1, wherein The synthetic light field is the vector superposition of the complex amplitudes of multiple sub-beam light fields. The expression is as follows: in, represents the complex amplitude of the light field of the composite beam, represents the complex amplitude of the light field of the kth sub-beam, z is the transmission distance, t is the time, and n is the number of sub-beams.

4. The method according to claim 1, wherein The synthetic light field is the superposition of the light field intensities of multiple sub-beams. The expression is as follows: Where I represents the intensity of the composite beam, I k represents the light intensity of the kth sub-beam, z is the transmission distance, t is the time, and n is the number of sub-beams.

5. The method according to claim 1, wherein In step 3), when performing light field transmission and superposition calculation of the node, the operation is performed by judging whether the next pointer in the node is empty, and the light fields in all nodes are transmitted and simulated in sequence until the next pointer is empty.

6. A multi-beam coherent and incoherent combined transmission simulation system based on a linked list, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the program, the steps of the method according to any one of claims 1 to 5 are implemented.

Images