Full-connection space photon Isin machine with multi-channel arbitrary regulation and control

Abstract

The invention discloses a multi-channel arbitrary regulation and control full-connection space photon Isin machine, and belongs to the field of photoelectric intelligent calculation. The photon Isin machine comprises a laser light source module, a modulation multiplexing module and a detection electric control module. The photon Isin machine provided by the invention realizes multichannel multiplexing of a spatial spin matrix based on a diffraction beam splitting element and polarization multiplexing, realizes arbitrary full-connection coupling weight loading through a matrix decomposition approach, and finally realizes the full-connection space photon Isin machine with arbitrary regulation and control. According to the spatial multiplexing working mode, on one hand, calculation acceleration of the Isin model in any coupling connection can be achieved in a matrix decomposition mode, on the other hand, the modulation rate of the modulator is not sacrificed, and the defect that the calculation speed is low due to time division multiplexing is overcome. Therefore, the full-connection space photon Isin machine with multi-channel arbitrary regulation and control has important practical value in the fields of traffic planning, resource allocation, financial prediction, circuit design and the like.

Description

Technical Field

[0001] The present invention relates to a novel optoelectronic computing technology, in particular to a multi-channel arbitrarily controlled fully connected spatial photon Ising machine, belonging to the field of optoelectronic intelligent computing technology. Background Art

[0002] The Photonic Ising Machine utilizes the parallel processing capability and low-latency transmission characteristics of photons, and simulates the spin interaction and energy evolution process in the Ising model by designing a specific optical system or structure, thereby achieving computational acceleration of solving the Ising model.

[0003] At present, the mainstream photon Ising machine mainly includes two paths. One is the photon Ising machine based on the photon dynamic behavior and the automatic evolution of the energy of the physical system to the low state. The photon Ising machine based on the degenerate optical parametric oscillator proposed by Yamamoto Hisai et al. of Harvard University in the United States [Science 2016, 354: 603-606] is a representative, showing the great potential of photons in accelerating the simulation of complex systems. However, with the increase of the Ising spin scale, the system's sensitivity to noise also increases, resulting in the limitation of the system's stable working time, which becomes a major obstacle in practical applications. The other is the acceleration of the calculation based on spatial phase modulation to simulate the Ising spin Hamiltonian. This scheme loads spin information through the spatial division multiplexing of the spatial optical modulator and realizes the fast calculation of the Ising Hamiltonian by the coherent superposition of the light field. It can easily realize the simulation of a large-scale Ising system. However, the Hamiltonian calculation realized by this scheme is limited to a specific Ising model, that is, the coupling matrix can only be a symmetric matrix obtained by multiplying a vector with its transpose, which limits its versatility and flexibility in practical applications. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention proposes a multi-channel laser space division multiplexing based on a diffraction beam splitting element and combined with polarization multiplexing of multiple lasers, so that the calculation acceleration of the fully connected Ising model under any coupling matrix condition can be realized by means of matrix decomposition, which ultimately greatly expands the types of problems solved by the spatial photon Ising machine and will strongly promote the practical application of the spatial photon Ising machine. On the one hand, the present invention greatly expands the coupling free control range of the spatial photon Ising machine based on the mode of space division multiplexing; on the other hand, the requirement of fast flipping of the spin matrix is ​​realized through a binary phase modulator such as a MEMS-based binary phase modulator, and the programmable loading of the coupling matrix is ​​realized by a conventional liquid crystal spatial light modulator, thereby greatly improving the refresh frequency of the spatial photon Ising machine.

[0005] The technical solution of the present invention is as follows:

[0006] A multi-channel arbitrarily controlled fully connected spatial photon Ising machine, characterized by comprising a laser light source module, a modulation multiplexing module and a detection electronic control module;

[0007] The laser light source module is used to complete laser light source emission, polarization control, laser light path collimation and beam expansion, and includes at least two independent laser light paths, each of which includes a laser, a half-wave plate and a polarization beam splitter to adjust the polarization state of the laser, and forms a collimated laser light source through a collimating beam expander;

[0008] The modulation multiplexing module is used to complete the loading of multi-channel spin information and coupling matrix information, and includes at least two non-polarization beam splitters for splitting the laser beam; at least two binary phase modulators and diffraction beam splitting elements are respectively arranged in corresponding optical paths to realize the rapid flipping of the spin matrix and split the light beam into multiple sub-beams; multiple groups of liquid crystal spatial light modulators are loaded with programmable coupling matrices, and each channel corresponds to a working order of the diffraction beam splitting element with a specific diffraction angle to realize the separation of multiple orders at the back end;

[0009] The detection and electronic control module is used to realize the synchronous acquisition of multi-channel spin Hamiltonian optical signals, and complete the accumulation and summation of multi-channel signals in each iteration, as well as the calculation and comparison of the Hamiltonian light intensity signal changes, so as to generate a logic signal of whether to receive the current spin matrix and feed it back to the corresponding binary phase modulator;

[0010] Among them, the fully connected spatial photon Ising machine achieves computational acceleration under arbitrary coupling matrix conditions through the following steps:

[0011] -Use a laser light source module to generate at least two independent lasers with controllable polarization;

[0012] -Multi-channel multiplexing and modulation of lasers are performed through the modulation multiplexing module to load spin information and coupling matrix;

[0013] -Multi-channel optical signals are collected synchronously through the detection and electronic control modules, the Hamiltonian is calculated, and the spin matrix is ​​updated according to the Hamiltonian change and the Metropolis rule until the convergence conditions are met.

[0014] Preferably, the laser light source module includes a first laser, a first half wave plate, a first polarization beam splitter prism, a first collimating beam expander, a second laser, a second half wave plate and a second collimating beam expander; the continuous working laser beam emitted along the first laser is converted into linear polarized light having a certain angle between the polarization direction and the horizontal direction by the first half wave plate, and after passing through the first polarization beam splitter prism, the horizontal polarization component enters the second collimating beam expander, and the vertical polarization component enters the first collimating beam expander; the continuous working laser beam emitted along the second laser is converted into linear polarized light having a certain angle between the polarization direction and the horizontal direction by the second half wave plate, and after passing through the first polarization beam splitter prism, the horizontal polarization component enters the first straight beam expander, and the vertical polarization component enters the second collimating beam expander.

[0015] Preferably, the first collimating beam expander and the second collimating beam expander of the laser light source module are provided with an objective lens, a pinhole and a collimating lens in sequence along the propagation direction of the light path; the first laser, the objective lens, the pinhole and the collimating lens in the first spatial filter are kept centrally aligned; the second laser, the objective lens, the pinhole and the collimating lens in the second spatial filter are kept centrally aligned.

[0016] Preferably, the modulation multiplexing module includes two symmetrical main optical paths; one of the main optical paths is the vertical polarized light from the first laser and the horizontal polarized light from the second laser after collimation and expansion, which are reflected by the first non-polarization beam splitter along the direction of optical path transmission and enter the first binary phase modulator, and after being loaded with 0-π spatial phase wave by the first binary phase modulator, the reflection is transmitted through the first non-polarization beam splitter again, and then passes through the first lens and the first diffraction beam splitter element in sequence and enters the second polarization beam splitter, wherein the horizontal polarization component is reflected and converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction through the third half-wave plate, and after passing through the second lens and the first polarization and non-polarization combined beam splitting prism, after passing through the front non-polarization film layer, a part of the light is reflected and focused through the fourth lens to enter the light intensity monitoring optical fiber in the detection and electronic control module, and after the other part of the light is transmitted, the horizontal polarization component passes through the rear polarization film layer and enters the second liquid crystal spatial light modulator, and the vertical polarization component enters the first liquid crystal spatial light modulator after being reflected through the polarization film layer; after passing through the first liquid crystal spatial light modulator and the second liquid crystal spatial light modulator The reflected light returns along the original path, reflects after passing through the non-polarizing film layer of the first polarization-non-polarization combined beam splitter prism again, enters the second non-polarization beam splitter, reflects after passing through the second non-polarization beam splitter and enters the first focusing lens group for focusing, forming a spatially separated light spot array coupled into the first optical fiber array in the detection electronic control module; the light passing through the second polarization beam splitter is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the fourth half-wave plate, passes through the third lens and the second polarization-non-polarization combined beam splitter prism, passes through the front non-polarization film layer, and the horizontal polarization component in the transmitted light passes through the rear polarization film layer and enters the fourth liquid crystal spatial light modulator; the vertical polarization component enters the third liquid crystal spatial light modulator after being reflected by the polarization film layer; the light reflected by the third liquid crystal spatial light modulator and the fourth liquid crystal spatial light modulator returns along the original path, reflects after passing through the non-polarization film layer of the second polarization-non-polarization combined beam splitter prism again, enters the second non-polarization beam splitter, passes through the second non-polarization beam splitter and enters the first focusing lens group for focusing, forming a spatially separated light spot array, and couples into the first optical fiber array in the detection electronic control module;

[0017] The other main optical path is the horizontal polarization component from the first laser and the vertical polarization component from the second laser after collimation and expansion. They are reflected by the third non-polarization beam splitter along the direction of optical path transmission and enter the second binary phase modulator. After the second binary phase modulation is loaded with 0-π spatial phase wave, they are reflected and transmitted through the third non-polarization beam splitter again. Then, they pass through the fifth lens and the second diffraction beam splitter element in sequence and enter the third polarization beam splitter. The horizontal polarization component is transmitted and converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction through the fifth half-wave plate. After passing through the sixth lens and the third polarization-non-polarization combined beam splitter prism, a part of the light is transmitted through the front non-polarization film layer, and the horizontal polarization component passes through the rear polarization film layer and enters the sixth liquid crystal spatial light modulator; the vertical polarization component is reflected by the polarization film layer and enters the fifth liquid crystal spatial light modulator; the light reflected by the fifth liquid crystal spatial light modulator and the sixth liquid crystal spatial light modulator returns along the original path and passes through the non-polarization film of the third polarization-non-polarization combined beam splitter prism again. The light reflected by the third polarization beam splitter is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the sixth half-wave plate, and then passes through the seventh lens and the fourth polarization-non-polarization combined beam splitter prism, and then passes through the front non-polarization film layer. The horizontal polarization component in the transmitted light passes through the rear polarization film layer and then enters the eighth liquid crystal spatial light modulator; the vertical polarization component enters the seventh liquid crystal spatial light modulator after being reflected by the polarization film layer; the light reflected by the seventh liquid crystal spatial light modulator and the eighth liquid crystal spatial light modulator returns along the original path, and then passes through the non-polarization film layer of the fourth polarization-non-polarization combined beam splitter prism again and is reflected, and then is incident on the fourth non-polarization beam splitter, and then is reflected by the fourth non-polarization beam splitter and enters the second focusing lens group for focusing, forming a spatially separated light spot array, which is respectively coupled into the second optical fiber array in the detection electronic control module.

[0018] Preferably, the first 45-degree coating surface of the four polarization and non-polarization combined beam splitting prisms along the light path propagation direction is a non-polarization beam splitting film layer, and the second 45-degree coating surface is a polarization beam splitting film layer.

[0019] Preferably, in one main optical path, the first lens and the second lens form a confocal lens group, the first lens and the third lens form a confocal lens group, the distance d1 between the confocal plane of the confocal lens group composed of the first lens, the second lens and the third lens and the first diffraction beam splitter element, the period Λ of the first diffraction beam splitter element, the working plane of the first binary phase modulator and the working plane of the first liquid crystal light modulator, as well as the working plane of the first binary phase modulator and the working plane of the second liquid crystal light modulator all satisfy an object-image conjugate relationship with respect to the confocal lens group composed of the first lens and the second lens, the working plane of the first binary phase modulator and the working plane of the third liquid crystal light modulator, as well as the working plane of the first binary phase modulator and the working plane of the fourth liquid crystal light modulator all satisfy an object-image conjugate relationship with respect to the confocal lens group composed of the first lens and the third lens, and the distance d2 between the first liquid crystal light modulator and the second lens, between the second liquid crystal light modulator and the second lens, between the third liquid crystal light modulator and the third lens, and between the fourth liquid crystal light modulator and the third lens, satisfy the following formula

[0020]

[0021] Where D is the incident beam aperture, λ is the incident beam operating wavelength, f1 is the focal length of the first lens, and f2 is the focal length of the second lens and the third lens;

[0022] The other main optical path is similar.

[0023] Preferably, the first focusing lens group and the second focusing lens group are both telecentric scanning field lenses, which are used to couple the multi-path modulated lights with different angles emitted by the diffraction beam splitting element into the first optical fiber array and the second optical fiber array at equal intervals and at a smaller angle.

[0024] Preferably, the first non-polarization beam splitter, the second non-polarization beam splitter, the third non-polarization beam splitter, and the fourth non-polarization beam splitter are all 50%:50% beam splitters.

[0025] Preferably, the detection and electronic control module comprises: a first optical fiber array, a first detection photodetector array, a first multi-channel sampling and holding and analog-to-digital conversion circuit, a second optical fiber array, a second photodetector array, a second multi-channel sampling and holding and analog-to-digital conversion circuit, a light intensity monitoring optical fiber, a light intensity monitoring photodetector, a single channel sampling and holding and analog-to-digital conversion circuit, and a field programmable gate array board; the first optical fiber array is a single-mode optical fiber array, and each channel between the first optical fiber array and the first photodetector array is provided with a narrow-band filter for the central wavelength of the laser light source; the second optical fiber array is a single-mode optical fiber array, and each channel between the second optical fiber array and the second photodetector array is provided with a narrow-band filter for the central wavelength of the laser light source; the field programmable gate array board synchronously controls the first detection photodetector array, the second detection photodetector array, the light intensity monitoring photodetector, the first binary phase modulator and the second binary phase detector, and completes the calculation and comparison of the Hamiltonian light intensity signal change, thereby generating a logic signal of whether to receive the current spin matrix and feeding it back to the first binary phase modulator and the second binary phase modulator.

[0026] Preferably, the Hamiltonian is calculated as follows:

[0027]

[0028] Among them, I i (t) represents the i-th photoelectric signal collected by the i-th photodetector at the t-th iteration, N is the total number of channels, α i is the normalization coefficient of the Hamiltonian of the i-th channel.

[0029] Preferably, the first diffraction beam splitter element of the modulation multiplexing module is behind the first lens and in front of the second lens and the third lens, the second diffraction beam splitter element is behind the fifth lens and in front of the sixth lens and the seventh lens, and the first diffraction beam splitter element and the second diffraction beam splitter element can both move axially along the optical axis.

[0030] Preferably, the first diffraction beam splitter element and the second diffraction beam splitter element are both two-dimensional Dammann gratings, and the first diffraction beam splitter element and the second diffraction beam splitter element may be a binary phase structure or a multi-step phase structure.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1) The present invention realizes efficient simulation of complex Ising model by processing multiple independent laser light paths in parallel. Each light path can independently load and process different spin information and coupling matrices, which greatly improves the computational efficiency and is particularly suitable for processing large-scale optimization problems, such as combinatorial optimization and feature selection in machine learning.

[0033] 2) Using a liquid crystal spatial light modulator to load a programmable coupling matrix enables the system to flexibly respond to different Ising model configurations and adapt to a variety of application scenarios without physically changing the hardware structure. This programmability provides great convenience and versatility for scientific research and engineering applications.

[0034] 3) Through precise laser light source control (including polarization control and optical path collimation and beam expansion) and high-precision phase modulation and diffraction beam splitting technology, high-precision operation of the system is ensured. At the same time, the synchronous acquisition and cumulative summation mechanism of multi-channel signals effectively reduces noise interference and improves the stability and accuracy of the calculation results.

[0035] 4) Ensure that the photon Ising machine has a sufficiently high refresh rate. The system has good environmental adaptability and is insensitive to environmental noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of an embodiment of a fully connected spatial photonic Ising machine with arbitrary multi-channel control of the present invention.

[0037] In the figure: 100—first laser; 200—second laser; 101—first half-wave plate; 201—second half-wave plate; 102—first polarization beam splitter; 103—first collimating beam expander; 202—second collimating beam expander; 104—first non-polarization beam splitter; 105—first binary phase modulator; 106—first lens; 107—first diffraction beam splitter element; 108—second polarization beam splitter; 109—third half-wave plate; 110—fourth half-wave plate; 111—first polarization beam splitter; 112—first polarization beam splitter; 113—first polarization beam splitter; 114—first polarization beam splitter; 115—first polarization beam splitter; 116—first polarization beam splitter; 117—first polarization beam splitter; 118—second polarization beam splitter; 119—third half-wave plate; 120—fourth half-wave plate; 121—first polarization beam splitter; 122—first polarization beam splitter; 123—first polarization beam splitter; 124—first polarization beam splitter; 125—first polarization beam splitter; 126—first polarization beam splitter; 127—first polarization beam splitter; 128—second polarization beam splitter; 129—third half-wave plate; 130—fourth half-wave plate; 131—first polarization beam splitter; 132—first polarization beam splitter; 133—first polarization beam splitter; 134—first polarization beam splitter; 135—first polarization beam splitter; 136—first polarization beam splitter; 137—first polarization beam splitter; 138—second polarization beam splitter; 139—third half-wave plate; 14 11—second lens; 112—third lens; 113—first polarization-non-polarization combined beam splitter prism; 114—second polarization-non-polarization combined beam splitter prism; 115—first liquid crystal light modulator; 117—second liquid crystal light modulator; 116—third liquid crystal light modulator; 118—fourth liquid crystal light modulator; 119—second non-polarization beam splitter; 120—first focusing lens group; 121—fourth lens; 122—light intensity monitoring optical fiber; 123—light intensity monitoring photodetector; 124—first optical fiber array ; 125—first photodetector array; 203—third non-polarizing beam splitter; 204—second binary phase modulator; 205—fifth lens; 206—second diffraction beam splitter element; 207—third polarizing beam splitter; 208—fifth half wave plate; 209—sixth half wave plate; 210—sixth lens; 211—seventh lens; 212—third polarizing and non-polarizing combined beam splitter prism; 213—third polarizing and non-polarizing combined beam splitter prism; 214—fifth liquid crystal light modulator; 216—first Six liquid crystal light modulators; 215—seventh liquid crystal light modulator; 217—eighth liquid crystal light modulator; 218—fourth non-polarization beam splitter; 219—second focusing lens group; 220—second optical fiber array; 221—second photodetector array; 300—field programmable gate array control board; 301—single-channel sampling and holding, analog-to-digital conversion and data acquisition card; 302—first multi-channel sampling and holding, analog-to-digital conversion and data acquisition card; 303—second multi-channel sampling and holding, analog-to-digital conversion and data acquisition card.

[0038] Figure 2 Schematic diagram of the control flow of a fully connected spatial photonic Ising machine with arbitrary multi-channel control.

[0039] Figure 3 It is a geometrical schematic diagram of the polarization and non-polarization combined beam splitting prism in the present invention.

[0040] In the figure: a is the side length of the rectangular incident cross section of the polarization-non-polarization combined beam splitter prism, A and B are 45-degree polarization and non-polarization beam splitter coating surfaces, respectively, 1101 is the first right-angle prism, the corresponding 45-degree inclined surface is the polarization beam splitter coating surface; 1102 is the second right-angle prism, the corresponding 45-degree inclined surface is the non-polarization beam splitter coating surface; 1103 is a parallelogram prism, and the two 45-degree inclined surfaces correspond to the polarization and non-polarization beam splitter coating surfaces, respectively.

[0041] Figure 4 It is a schematic diagram of the diffraction beam splitting projection geometry of the diffraction beam splitting element in the present invention.

[0042] In the figure: D is the incident spot diameter, d1 is the distance between the diffraction beam splitter element and the confocal plane of the confocal lens group, d2 is the distance from the liquid crystal light modulator to the first lens in the confocal lens group; f1 is the focal length of the first lens and the fifth lens; f2 is the focal length of the second lens, the third lens, the sixth lens and the seventh lens. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but this should not be used to limit the protection scope of the present invention.

[0044] See also Figure 1 , Figure 1 This is a schematic diagram of an embodiment of a multi-channel arbitrarily regulated fully connected spatial photon Ising machine of the present invention. As shown in the figure, a multi-channel arbitrarily regulated fully connected spatial photon Ising machine includes a laser light source module, a modulation multiplexing module and a detection and electrical control module; wherein the laser light source module is used to complete the emission of the laser light source, polarization control, laser light path collimation and beam expansion, and provide a polarization-controlled collimated laser light source for the photon Ising machine. The modulation multiplexing module is used to complete the loading of multi-channel spin information and coupling matrix information. Each channel corresponds to a working order with a specific diffraction angle of the diffraction beam splitting element, so that effective separation of multiple orders can be achieved at the back end. The detection and electrical control module is used to realize the synchronous acquisition of multi-channel spin Hamiltonian optical signals, and complete the cumulative summation of multi-channel signals in each iteration, as well as the calculation and comparison of the Hamiltonian light intensity signal change, thereby generating a logic signal of whether to receive the current spin matrix and feeding it back to the first binary phase modulator and the second binary phase modulator.

[0045] The laser light source module comprises a first laser 100 , a first half wave plate 101 , a first polarization beam splitter prism 102 , a first collimating beam expander 103 , a second laser 200 , a second half wave plate 201 and a second collimating beam expander 202 .

[0046] The laser light source module includes two independent laser light paths, one of which is transmitted along the direction of the light path, and the continuous working laser beam emitted by the first laser 101 is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction (assuming the angle is θ1) by the first half-wave plate 101, and after passing through the first polarization beam splitter prism 102, the horizontal polarization component enters the second collimating beam expander 202, and the vertical polarization component enters the first collimating beam expander 103; the other is transmitted along the direction of the light path, and the continuous working laser beam emitted by the second laser 200 is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction (assuming the angle is θ2) by the second half-wave plate 201, and after passing through the first polarization beam splitter prism 102, the horizontal polarization component enters the second collimating beam expander 103, and the vertical polarization component enters the first collimating beam expander 102.

[0047] The modulation multiplexing module includes: a first non-polarization beam splitter 104, a first binary phase modulator 105, a first lens 106, a first diffraction beam splitting element 107, a second polarization beam splitter 108, a third half wave plate 109, a second lens 111, a fourth half wave plate 110, a third lens 112, a first polarization-non-polarization combined beam splitting prism 113, a first liquid crystal spatial light modulator 115, a second liquid crystal spatial light modulator 117, a second polarization-non-polarization combined beam splitting prism 114, a third liquid crystal spatial light modulator 116, a fourth liquid crystal spatial light modulator 118, a second non-polarization beam splitter 119, a first focusing lens group 120, and a fourth lens 121; a third non-polarization beam splitter 203, a second binary phase modulator The lens 204, the fifth lens 205, the second diffraction beam splitter element 206, the third polarization beam splitter 207, the fifth half wave plate 208, the sixth lens 210, the sixth half wave plate 209, the seventh lens 211, the third polarization and non-polarization combined beam splitter prism 212, the fifth liquid crystal spatial light modulator 214, the sixth liquid crystal spatial light modulator 216, the fourth polarization and non-polarization combined beam splitter prism 213, the seventh liquid crystal spatial light modulator 215, the eighth liquid crystal spatial light modulator 217, the fourth non-polarization beam splitter 218 and the second focusing lens group 219; wherein, the first 45-degree coating surface of the four polarization and non-polarization combined beam splitter prisms along the propagation direction of the light path is a non-polarization beam splitter film layer, and the second 45-degree coating surface is a polarization beam splitter film layer.

[0048] The first lens 106 and the second lens 111 form a confocal lens group, the first lens 106 and the third lens 112 form a confocal lens group, the distance d1 between the confocal plane of the confocal lens group formed by the first lens 106, the second lens 111, and the third lens 112 and the first diffractive beam splitter 107, the period Λ of the first diffractive beam splitter 107, the working surface of the first binary phase modulator 105 and the working surface of the first liquid crystal light modulator 115, and the working surface of the first binary phase modulator 105 and the working surface of the second liquid crystal light modulator 117 all satisfy the object-image co-conformity with respect to the confocal lens group formed by the first lens 106 and the second lens 111. The working surfaces of the first binary phase modulator 105 and the third liquid crystal light modulator 116, as well as the working surfaces of the first binary phase modulator 105 and the fourth liquid crystal light modulator 118 satisfy the object-image conjugate relationship with respect to the confocal lens group composed of the first lens 106 and the third lens 112, and the distance d2 between the first liquid crystal light modulator 115 and the second lens 111, the distance between the second liquid crystal light modulator 117 and the second lens 111, the distance between the third liquid crystal light modulator 116 and the third lens 112, and the distance d3 between the fourth liquid crystal light modulator 118 and the third lens 112 satisfy the following formula:

[0049]

[0050] Wherein, D is the incident light beam aperture, λ is the incident light beam operating wavelength, f1 is the focal length of the first lens 106 , and f2 is the focal length of the second lens 111 and the third lens 112 .

[0051] The first focusing lens group 120 and the second focusing lens group 219 are both telecentric scanning field lenses, which are used to couple the multi-path modulated lights with different angles emitted by the diffraction beam splitter element into the first optical fiber array 124 and the second optical fiber array 220 at equal intervals and at a smaller angle.

[0052] The main optical path of the modulation and multiplexing module is divided into two paths:

[0053] One of the main optical paths is the vertical polarized light from the first laser 100 and the horizontal polarized light from the second laser 200 after collimation and expansion. It is reflected by the first non-polarization beam splitter 104 along the direction of optical transmission and enters the first binary phase modulator 105. After the first binary phase modulator 105 loads the 0-π spatial phase wave, the reflection is transmitted through the first non-polarization beam splitter 104 again, and then passes through the first lens 106 and the first diffraction beam splitter element 107 in sequence and enters the second polarization beam splitter 108. Among them, the horizontal polarization component is reflected and converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction (assuming the angle is θ3) through the third half-wave plate 109. After passing through the second lens 111 and the first polarization and non-polarization combined beam splitter prism 113, after passing through the front non-polarization film layer, a part of the light is reflected and focused through the fourth lens 121 to enter the detection electric control module After another part of the light is transmitted through the light intensity monitoring optical fiber 122 in the block, the horizontal polarization component passes through the polarization film layer at the back and then enters the second liquid crystal spatial light modulator 117, and the vertical polarization component enters the first liquid crystal spatial light modulator 115 after being reflected by the polarization film layer; the light reflected by the first liquid crystal spatial light modulator 115 and the second liquid crystal spatial light modulator 117 returns along the original path, and is reflected again after passing through the non-polarization film layer of the first polarization-non-polarization combined beam splitting prism 113, and is incident on the second non-polarization beam splitter 119, and is reflected by the second non-polarization beam splitter 119 and enters the first focusing lens group 120 for focusing, forming a spatially separated light spot array coupled into the first optical fiber array 124 in the detection electronic control module; the light passing through the second polarization beam splitter 108 is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the fourth half-wave plate 110 (assuming the angle is θ4). After passing through the third lens 112 and the second polarization-non-polarization combined beam splitter prism 114, and after passing through the front non-polarization film layer, the horizontal polarization component of the transmitted light passes through the rear polarization film layer and enters the fourth liquid crystal spatial light modulator 118; the vertical polarization component enters the third liquid crystal spatial light modulator 116 after being reflected by the polarization film layer; the light reflected by the third liquid crystal spatial light modulator 116 and the fourth liquid crystal spatial light modulator 118 returns along the original path, passes through the non-polarization film layer of the second polarization-non-polarization combined beam splitter prism 114 again and is reflected, and is incident on the second non-polarization beam splitter 119, passes through the second non-polarization beam splitter 119 and enters the first focusing lens group 120 for focusing, forming a spatially separated light spot array, which is coupled into the first optical fiber array 124 in the detection electronic control module.

[0054] The other main optical path is the horizontal polarization component from the first laser 100 and the vertical polarization component from the second laser 200 after collimation and expansion. It is reflected by the third non-polarization beam splitter 203 along the direction of optical transmission and enters the second binary phase modulator 204. After being loaded with a 0-π spatial phase wave by the second binary phase modulator 204, it is reflected and transmitted through the third non-polarization beam splitter 203 again, and then passes through the fifth lens 205 and the second diffraction beam splitter element 206 in sequence, and enters the third polarization beam splitter 207, wherein the horizontal polarization component is transmitted and converted into linear polarized light having a certain angle between the polarization direction and the horizontal direction by the fifth half-wave plate 208 (the angle is assumed to be θ5). After passing through the sixth lens 210 and the third polarization-non-polarization combined beam splitter prism 212, a portion of the light transmitted through the front non-polarization film layer, the horizontal polarization component passes through the rear polarization film layer and then enters the sixth liquid crystal spatial light modulator 216; the vertical polarization component is reflected by the polarization film layer and then enters the fifth liquid crystal spatial light modulator 214; the light reflected by the fifth liquid crystal spatial light modulator 214 and the sixth liquid crystal spatial light modulator 216 returns along the original path, and is reflected again after passing through the non-polarization film layer of the third polarization-non-polarization combined beam splitter prism 212, and is incident on the fourth non-polarization beam splitter 218, and enters the second focusing lens group 219 through the fourth non-polarization beam splitter 218 for focusing, forming a spatially separated light spot array, which is coupled into the second optical fiber array 220 in the detection electronic control module respectively; the light reflected by the third polarization beam splitter 207 is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the sixth half-wave plate 209 (assuming the angle is θ6). Therefore, after passing through the seventh lens 211 and the fourth polarization-non-polarization combined beam splitter prism 213, and after passing through the front non-polarization film layer, the horizontal polarization component in the transmitted light passes through the rear polarization film layer and enters the eighth liquid crystal spatial light modulator 217; the vertical polarization component enters the seventh liquid crystal spatial light modulator 215 after being reflected by the polarization film layer; the light reflected by the seventh liquid crystal spatial light modulator 215 and the eighth liquid crystal spatial light modulator 217 returns along the original path, and is reflected again after passing through the non-polarization film layer of the fourth polarization-non-polarization combined beam splitter prism 213, and is incident on the fourth non-polarization beam splitter 218, and is reflected by the fourth non-polarization beam splitter 218 and enters the second focusing lens group 219 for focusing, forming spatially separated light spot arrays, which are respectively coupled into the second optical fiber array 220 in the detection electronic control module.

[0055] The detection and electrical control module includes: a first optical fiber array 124, a first detection photodetector array 125, a first multi-channel sampling and holding and analog-to-digital conversion circuit 302, a second optical fiber array 220, a second photodetector array 221, a second multi-channel sampling and holding and analog-to-digital conversion circuit 303, a light intensity monitoring optical fiber 122, a light intensity monitoring photodetector 123, a single channel sampling and holding and analog-to-digital conversion circuit 301, and a field programmable gate array board 300.

[0056] The first optical fiber array 124 is a single-mode optical fiber array, and each channel between the first optical fiber array 124 and the first photodetector array 125 is provided with a narrow-band filter for the central wavelength of the laser light source to improve the signal-to-noise ratio of signal detection; the second optical fiber array 220 is a single-mode optical fiber array, and each channel between the second optical fiber array 220 and the second photodetector array 221 is provided with a narrow-band filter for the central wavelength of the laser light source to improve the signal-to-noise ratio of signal detection.

[0057] The field programmable gate array (FPGA) board 300 serves as a core control and processing unit to realize synchronous control of the first photodetector array 125, the second photodetector array 221, the light intensity monitoring photodetector 123, the first binary phase modulator 105 and the second binary phase detector 204, ensuring that all components can work seamlessly together according to a predetermined timing.

[0058] FPGA integrates high-performance data processing capabilities to calculate the change in the Hamiltonian light intensity signal. Specifically, the photoelectric signals collected by multiple channels in the first photodetector array and the second photodetector array are normalized and then superimposed and summed to obtain the Hamiltonian of the system. Among them, the signals collected by each photodetector in each iteration (or time step) are considered separately and adjusted by their respective normalization coefficients to ensure the accuracy of the calculation results. The total number of channels N determines the number of signals involved in the calculation, and the normalization coefficient of each channel ensures the rationality of the weight of each channel signal in the superposition process. In addition, FPGA also has a built-in random number generator that can generate random numbers between 0 and 1 in real time for the subsequent decision-making process, that is, to determine whether to receive the current spin matrix according to certain algorithms or conditions (which may be based on the change in the Hamiltonian, light intensity monitoring results or other system parameters). Once a decision is made, the FPGA will immediately generate the corresponding logic signal and quickly feed it back to the first and second binary phase modulators. These logic signals will instruct the first and second binary phase modulators to adjust the phase of the optical signal, thereby affecting the subsequent state or measurement results of the system.

[0059] Hamiltonian Among them, I i (t) represents the i-th photoelectric signal collected by the i-th photodetector at the t-th iteration, N is the total number of channels, α i is the normalization coefficient of the Hamiltonian of the i-th channel.

[0060] FPGA integrates the annealing algorithm of Metropolis rule, that is, dynamically adjusts the system state according to the change of Hamiltonian light intensity signal. Specifically, when the Hamiltonian light intensity signal is detected to decrease, the current spin matrix is ​​received; when the Hamiltonian light intensity signal is detected to increase, a random number between 0 and 1 is generated, and the random number is compared with the preset threshold exp(-ΔH / T). When the random number is less than or equal to exp(-ΔH / T), the current spin matrix is ​​received; otherwise, the spin matrix is ​​not received, and the logic signal is fed back to the first binary phase modulator and the second binary phase modulator.

[0061] Figure 2 The control flow diagram of a fully connected spatial photonic Ising machine with arbitrary multi-channel control is shown in the figure, including:

[0062] 1. Parameter initialization phase, including:

[0063] The coupling matrix J is defined according to the problem model: the strength and type of interaction between spins;

[0064] The initial spin matrix σ: a spin configuration set randomly or according to a certain strategy (usually +1 or -1 is used to represent the spin direction); the initial annealing temperature T; the annealing coefficient β, and the number of parallel computing channels C: determined by the number of system hardware multiplexing channels, used to accelerate the calculation process.

[0065] 2. Computing resource allocation:

[0066] According to the spin matrix size (i.e., the number of elements), calculate the required number of multiplexing channels N (N≤the number of spin matrix units), and calculate the number of time-sharing calculations required nn=ceil(N / C), where ceil(.) means rounding up; initialize the variable H0=Inf, the current Hamiltonian H=0; the iteration counter n=0;

[0067] 3. Spin matrix update:

[0068] Adopt some rules (such as flipping attempts in Monte Carlo method) to update the configuration of spin matrix σ';

[0069] 4. Load C parallel computing channels;

[0070] 5. Trigger the photodetector array to collect light intensity signals I of C channels in parallel i ;

[0071] 6. Accumulate and calculate the Hamiltonian H = H + ∑ i α i I i , where α i is the normalization coefficient of Hamiltonian of the i-th channel; n = n + 1;

[0072] 7. Determine whether n < nn holds. If it holds, exit the loop and output the current updated spin matrix as σ’ and the corresponding Hamiltonian H; otherwise, return to step 4 and continue the iteration.

[0073] 8. Calculate the change in the Hamiltonian, that is, in each iteration, calculate the difference between the current Hamiltonian and the Hamiltonian recorded in the previous iteration, dH = H - H0.

[0074] 9. Generate a random number r between 0 and 1, and determine whether r < min{1, exp(-dH / T)} holds. If it holds, update the spin matrix as σ = σ’, and the initial Hamiltonian H0 = H; otherwise, directly proceed to step 10.

[0075] 10. Update the annealing temperature T = T * β according to the annealing coefficient, and gradually reduce the system temperature to approach the global optimal solution.

[0076] 11. Determine whether the convergence conditions are met, including the convergence accuracy criterion, the maximum iteration number criterion, and the gradient criterion. If any of the convergence conditions are met, output the final spin matrix and its Hamiltonian, and terminate the algorithm. Otherwise, return to step 3. Among them, the three criteria for the convergence conditions are as follows: ① Convergence accuracy criterion: Set a convergence condition based on the change in the solution during the iteration process. When the difference between the solutions of two adjacent iterations is less than a preset very small positive number (referred to as the convergence accuracy or threshold), it is considered that the iteration has converged and the iteration can be terminated. ② Maximum iteration number criterion: Set a maximum iteration number. When the iteration number reaches this value, regardless of whether it has converged or not, the iteration is terminated. This can prevent the algorithm from falling into an infinite loop or being unable to converge. ③ Gradient criterion: When the change in the value of the objective function between two adjacent iterations is less than a preset threshold, it can be considered that the objective function has approached the optimal solution, and thus the iteration is terminated.

[0077] 12. Exit the loop and terminate the algorithm.

[0078] Figure 3The geometrical schematic diagram of the polarization and non-polarization combined beam splitter prism in the present invention is shown in the figure. The first right-angle prism 1101 has a 45-degree inclined plane, on which a polarization beam splitter film is coated. The polarization beam splitter film can split the incident light into two beams of light in different directions according to different polarization states (such as S-polarized light and P-polarized light). That is, if the incident light has a specific polarization state, then this beam of light will be separated into two beams of light by the beam splitter film according to its polarization direction, one of which is reflected and the other is transmitted. The second right-angle prism 1102: Similar to the first right-angle prism 1101, it has a non-polarization beam splitter coating surface. The non-polarization beam splitter film is not sensitive to the polarization state of light, but separates the light beam based on the wavelength of light, the incident angle or the specific design of the film layer. That is, no matter what the polarization state of light is, it will be separated by this film layer in a specific way (such as transmission and reflection). Parallelogram prism 1103: Its two 45-degree inclined surfaces correspond to the polarization and non-polarization beam splitting coating surfaces respectively, thereby realizing the polarization and non-polarization beam splitting functions in a single prism. By integrating the polarization beam splitting and non-polarization beam splitting functions into the same prism, the noise introduced by the interface reflection and scattering between multiple optical elements can be reduced, and the beam splitting system can be made more compact and stable. a is the side length of the rectangular incident cross section of the polarization and non-polarization combined beam splitting prism, and A and B are the 45-degree polarization and non-polarization beam splitting coating surfaces respectively.

[0079] See also Figure 4 , Figure 4 The diffraction beam splitting projection geometry diagram of the diffraction beam splitting element in the present invention is shown in the figure. As shown in the figure, a beam of incident light that has been subjected to binary phase modulation and carries a spin phase wave surface is incident on a 4f imaging system (in this embodiment, a first lens 106 and a second lens 111 with focal lengths of f1 and f2 are used to form a confocal lens group). The first diffraction beam splitting element 107 is placed between the first lens 106 and the second lens 111. If the aperture of the incident light is D, the aperture of the outgoing light is For example, if the distance d1 between the confocal plane of the confocal lens group composed of the first lens 106 and the second lens 111 and the first diffractive beam splitter element 107 is equal to, then the distance d2 between the liquid crystal screen of the first liquid crystal light modulator 115 and the second lens 111 satisfies the following formula:

[0080]

[0081] Assume that the focal lengths of the two lenses of the confocal lens group are f1=300mm and f2=150mm respectively; the distance between the diffraction beam splitter element and the confocal plane of the lens group is d1=200mm, the working wavelength is 532nm, the incident beam aperture is 2.4mm, and the corresponding period of the diffraction beam splitter element is 100 microns, then d2=93.3mm.

[0082] Experiments have shown that the invention realizes multi-channel spatial multiplexing through diffraction beam splitting elements and polarization multiplexing technology. Each channel can independently process different spin information and coupling matrices, thereby significantly improving computational parallelism and efficiency. It not only increases the processing capacity of the system, but also avoids the computational speed bottleneck that may be caused by time-division multiplexing, allowing the system to converge to the optimal solution faster. Through the matrix decomposition approach, combined with the programmability of the liquid crystal spatial light modulator, the loading of any fully connected coupling weight is realized, so that the system can cope with a wider range of Ising model application scenarios, improving the versatility and practicality of the system. At the same time, the laser light source module ensures high-quality output of the laser beam through precise polarization control and optical path collimation and beam expansion. The confocal lens group and object-image conjugate relationship design in the modulation multiplexing module further improve the modulation accuracy and stability of the system. The detection and electronic control module adopts the method of synchronous acquisition and cumulative summation to reduce noise interference and improve the accuracy and reliability of Hamiltonian calculation. The detection and electronic control module integrates the optical fiber array, photodetector array and field programmable gate array board to realize the synchronous acquisition and real-time processing of multi-channel optical signals. By calculating the change of the Hamiltonian light intensity signal and updating the spin matrix based on the Metropolis rule, a closed-loop control system is formed. This feedback mechanism enables the system to respond quickly and adjust the calculation process, improving the calculation efficiency and convergence speed. Through high-precision optical components and stable control algorithms, the impact of environmental noise on the calculation results is reduced. This makes the system have better stability and reliability in practical applications, and can be widely used in transportation planning, resource allocation, financial forecasting, and circuit design.

[0083] The above-published multi-channel arbitrarily controllable fully connected spatial photon Ising machine only represents an example of a specific implementation of the present invention, and cannot be understood as limiting the scope of protection of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the basic idea of ​​the present invention, they can also make several non-creative deformations and improvements to the specific implementation details and representative devices proposed in this patent, which all belong to the scope of protection of the present invention.

Claims

1. A multi-channel arbitrarily controlled fully connected spatial photon Ising machine, characterized in that: It includes a laser light source module, a modulation multiplexing module and a detection electronic control module; The laser light source module is used to complete laser light source emission, polarization control, laser light path collimation and beam expansion, and includes at least two independent laser light paths, each of which includes a laser, a half-wave plate and a polarization beam splitter to adjust the polarization state of the laser, and forms a collimated laser light source through a collimating beam expander; The modulation multiplexing module is used to complete the loading of multi-channel spin information and coupling matrix information, and includes at least two non-polarization beam splitters for splitting the laser beam; at least two binary phase modulators and diffraction beam splitting elements are respectively arranged in corresponding optical paths to realize the rapid flipping of the spin matrix and split the beam into multiple sub-beams; Multiple groups of liquid crystal spatial light modulators are loaded with a programmable coupling matrix, and each channel corresponds to a working order with a specific diffraction angle of the diffraction beam splitter element to achieve separation of multiple orders at the back end; The detection and electronic control module is used to realize the synchronous acquisition of multi-channel spin Hamiltonian optical signals, and complete the accumulation and summation of multi-channel signals in each iteration, as well as the calculation and comparison of the Hamiltonian light intensity signal changes, so as to generate a logic signal of whether to receive the current spin matrix and feed it back to the corresponding binary phase modulator; Among them, the fully connected spatial photon Ising machine achieves computational acceleration under arbitrary coupling matrix conditions through the following steps: -Use a laser light source module to generate at least two independent lasers with controllable polarization; -Multi-channel multiplexing and modulation of lasers are performed through the modulation multiplexing module to load spin information and coupling matrix; -Multi-channel optical signals are collected synchronously through the detection and electronic control modules, the Hamiltonian is calculated, and the spin matrix is ​​updated according to the Hamiltonian change and the Metropolis rule until the convergence conditions are met.

2. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 1, characterized in that: The laser light source module includes a first laser, a first half-wave plate, a first polarization beam splitter prism, a first collimating beam expander, a second laser, a second half-wave plate and a second collimating beam expander; the continuous working laser beam emitted along the first laser is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the first half-wave plate, and after passing through the first polarization beam splitter prism, the horizontal polarization component enters the second collimating beam expander, and the vertical polarization component enters the first collimating beam expander; the continuous working laser beam emitted along the second laser is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the second half-wave plate, and after passing through the first polarization beam splitter prism, the horizontal polarization component enters the first straight beam expander, and the vertical polarization component enters the second collimating beam expander.

3. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 2, characterized in that: The first collimating beam expander and the second collimating beam expander of the laser light source module are provided with an objective lens, a pinhole and a collimating lens in sequence along the propagation direction of the optical path; the first laser is kept centrally aligned with the objective lens, the pinhole and the collimating lens in the first spatial filter; the second laser is kept centrally aligned with the objective lens, the pinhole and the collimating lens in the second spatial filter.

4. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 1, characterized in that: The modulation multiplexing module includes two symmetrical main optical paths; one of the main optical paths is the vertical polarized light from the first laser and the horizontal polarized light from the second laser after collimation and expansion, which are reflected by the first non-polarization beam splitter along the direction of optical path transmission and enter the first binary phase modulator, and after being loaded with 0-π spatial phase wave by the first binary phase modulator, the reflection is transmitted through the first non-polarization beam splitter again, and then passes through the first lens and the first diffraction beam splitter element in sequence and enters the second polarization beam splitter, wherein the horizontal polarization component is reflected, and is converted into linear polarization light with a certain angle between the polarization direction and the horizontal direction through the third half-wave plate, and after passing through the second lens and the first polarization and non-polarization combined beam splitting prism, after passing through the front non-polarization film layer, a part of the light is reflected and focused by the fourth lens into the light intensity monitoring optical fiber in the detection and electronic control module, and after the other part of the light is transmitted, the horizontal polarization component passes through the rear polarization film layer and enters the second liquid crystal spatial light modulator, and the vertical polarization component enters the first liquid crystal spatial light modulator after being reflected by the polarization film layer; after being reflected by the first liquid crystal spatial light modulator and the second liquid crystal spatial light modulator The light returns along the original path, passes through the non-polarization film layer of the first polarization-non-polarization combined beam splitter prism again and is reflected, enters the second non-polarization beam splitter, is reflected by the second non-polarization beam splitter and enters the first focusing lens group for focusing, forms a spatially separated light spot array coupled into the first optical fiber array in the detection electronic control module; the light passing through the second polarization beam splitter is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the fourth half-wave plate, passes through the third lens and the second polarization-non-polarization combined beam splitter prism, passes through the front non-polarization film layer, and the horizontal polarization component in the transmitted light passes through the rear polarization film layer and enters the fourth liquid crystal spatial light modulator; the vertical polarization component enters the third liquid crystal spatial light modulator after being reflected by the polarization film layer; the light reflected by the third liquid crystal spatial light modulator and the fourth liquid crystal spatial light modulator returns along the original path, passes through the non-polarization film layer of the second polarization-non-polarization combined beam splitter prism again and is reflected, enters the second non-polarization beam splitter, passes through the second non-polarization beam splitter and enters the first focusing lens group for focusing, forms a spatially separated light spot array, and is coupled into the first optical fiber array in the detection electronic control module; The other main optical path is the horizontal polarization component from the first laser and the vertical polarization component from the second laser after collimation and expansion. They are reflected by the third non-polarization beam splitter along the direction of optical transmission and enter the second binary phase modulator. After being loaded with 0-π spatial phase wave by the second binary phase modulator, they are reflected and transmitted through the third non-polarization beam splitter again. Then, they pass through the fifth lens and the second diffraction beam splitter element in sequence and enter the third polarization beam splitter. The horizontal polarization component is transmitted and converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction through the fifth half-wave plate. After passing through the sixth lens and the third polarization-non-polarization combined beam splitter prism, a part of the light is transmitted through the front non-polarization film layer, and the horizontal polarization component passes through the rear polarization film layer and enters the sixth liquid crystal spatial light modulator; the vertical polarization component enters the fifth liquid crystal spatial light modulator after being reflected by the polarization film layer; the light reflected by the fifth liquid crystal spatial light modulator and the sixth liquid crystal spatial light modulator returns along the original path and passes through the non-polarization film of the third polarization-non-polarization combined beam splitter prism again. The light reflected by the third polarization beam splitter is converted into linear polarized light with a certain angle between the polarization direction and the horizontal direction by the sixth half-wave plate, and then passes through the seventh lens and the fourth polarization-non-polarization combined beam splitter prism, and then passes through the front non-polarization film layer. The horizontal polarization component in the transmitted light passes through the rear polarization film layer and then enters the eighth liquid crystal spatial light modulator; the vertical polarization component enters the seventh liquid crystal spatial light modulator after being reflected by the polarization film layer; the light reflected by the seventh liquid crystal spatial light modulator and the eighth liquid crystal spatial light modulator returns along the original path, and then passes through the non-polarization film layer of the fourth polarization-non-polarization combined beam splitter prism again and is reflected, and then is incident on the fourth non-polarization beam splitter, and then is reflected by the fourth non-polarization beam splitter and enters the second focusing lens group for focusing, forming a spatially separated light spot array, which is respectively coupled into the second optical fiber array in the detection electronic control module.

5. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 4, characterized in that: The first 45-degree coating surface of the four polarization and non-polarization combined beam splitter prisms along the optical propagation direction is a non-polarization beam splitter film layer, and the second 45-degree coating surface is a polarization beam splitter film layer.

6. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 4, characterized in that: In one of the main optical paths, the first lens and the second lens form a confocal lens group, the first lens and the third lens form a confocal lens group, the distance d1 between the confocal plane of the confocal lens group composed of the first lens, the second lens and the third lens and the first diffraction beam splitter element, the period Λ of the first diffraction beam splitter element, the working surface of the first binary phase modulator and the working surface of the first liquid crystal light modulator, and the working surface of the first binary phase modulator and the working surface of the second liquid crystal light modulator all satisfy the object-image conjugate relationship with respect to the confocal lens group composed of the first lens and the second lens, the working surface of the first binary phase modulator and the working surface of the third liquid crystal light modulator, and the working surface of the first binary phase modulator and the working surface of the fourth liquid crystal light modulator all satisfy the object-image conjugate relationship with respect to the confocal lens group composed of the first lens and the third lens, and the distance between the first liquid crystal light modulator and the second lens, the distance between the second liquid crystal light modulator and the second lens, the distance between the third liquid crystal light modulator and the third lens, and the distance d2 between the fourth liquid crystal light modulator and the third lens satisfy the following formula Where D is the incident beam aperture, λ is the incident beam operating wavelength, f1 is the focal length of the first lens, and f2 is the focal length of the second lens and the third lens; The other main optical path is similar.

7. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 4, characterized in that: The first focusing lens group and the second focusing lens group are both telecentric scanning field lenses, which are used to couple the multi-path modulated lights with different angles emitted by the diffraction beam splitting element into the first optical fiber array and the second optical fiber array at equal intervals and at a smaller angle.

8. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 4, characterized in that: The first non-polarization beam splitter, the second non-polarization beam splitter, the third non-polarization beam splitter, and the fourth non-polarization beam splitter are all 50%:50% beam splitters.

9. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 1, characterized in that: The detection and electric control module includes: a first optical fiber array, a first detection photodetector array, a first multi-channel sampling and holding and analog-to-digital conversion circuit, a second optical fiber array, a second photodetector array, a second multi-channel sampling and holding and analog-to-digital conversion circuit, a light intensity monitoring optical fiber, a light intensity monitoring photodetector, a single channel sampling and holding and analog-to-digital conversion circuit, and a field programmable gate array board; the first optical fiber array is a single-mode optical fiber array, and each channel between the first optical fiber array and the first photodetector array is provided with a narrow-band filter for the central wavelength of the laser light source; the second optical fiber array is a single-mode optical fiber array, and each channel between the second optical fiber array and the second photodetector array is provided with a narrow-band filter for the central wavelength of the laser light source; the field programmable gate array board synchronously controls the first detection photodetector array, the second detection photodetector array, the light intensity monitoring photodetector, the first binary phase modulator and the second binary phase detector, and completes the calculation and comparison of the Hamiltonian light intensity signal change, thereby generating a logic signal of whether to receive the current spin matrix and feeding it back to the first binary phase modulator and the second binary phase modulator.

10. The multi-channel arbitrarily controllable fully connected spatial photon Ising machine according to claim 9, characterized in that: The Hamiltonian is calculated as follows: Among them, I i (t) represents the i-th photoelectric signal collected by the i-th photodetector at the t-th iteration, N is the total number of channels, α i is the normalization coefficient of the Hamiltonian of the i-th channel.

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