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Orbital angular momentum-mediated machine learning for high-accuracy mode-feature encoding

Light(Science & Applications) 2024年第3期13卷 466-477页

作者： xinyuan fang Xiaonan Hu Baoli Li Hang Su Ke Cheng Haitao Luan Min Gu Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China

Machine learning with optical neural networks has featured unique advantages of the information processing including high speed,ultrawide bandwidths and low energy consumption because the optical dimensions(time,space,wavelength,and polarization)could be utilized to increase the degree of ***,due to the lack of the capability to extract the information features in the orbital angular momentum(OAM)domain,the theoretically unlimited OAM states have never been exploited to represent the signal of the input/output nodes in the neural network ***,we demonstrate OAM-mediated machine learning with an all-optical convolutional neural network(CNN)based on Laguerre-Gaussian(LG)beam modes with diverse diffraction *** proposed CNN architecture is composed of a trainable OAM mode-dispersion impulse as a convolutional kernel for feature extraction,and deep-learning diffractive layers as a *** resultant OAM mode-dispersion selectivity can be applied in information mode-feature encoding,leading to an accuracy as high as 97.2%for MNIST database through detecting the energy weighting coefficients of the encoded OAM modes,as well as a resistance to eavesdropping in point-to-point free-space ***,through extending the target encoded modes into multiplexed OAM states,we realize all-optical dimension reduction for anomaly detection with an accuracy of 85%.Our work provides a deep insight to the mechanism of machine learning with spatial modes basis,which can be further utilized to improve the performances of various machine-vision tasks by constructing the unsupervised learning-based auto-encoder.

关键词： polarization mode momentum

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Multi-dimensional multiplexing optical secret sharing framework with cascaded liquid crystal holograms

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Opto-Electronic Advances 2024年第1期7卷 28-35页

作者： Keyao Li Yiming Wang Dapu Pi Baoli Li Haitao Luan xinyuan fang Peng Chen Yanqing Lu Min Gu Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China National Laboratory of Solid State Microstructures and College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

Secret sharing is a promising technology for information encryption by splitting the secret information into different ***,the traditional scheme suffers from information leakage in decryption process since the amount of available information channels is ***,we propose and demonstrate an optical secret sharing framework based on the multi-dimensional multiplexing liquid crystal(LC)*** LC holograms are used as spatially separated shares to carry secret *** polarization of the incident light and the distance between different shares are served as secret keys,which can significantly improve the information security and ***,the decryption condition is also restricted by the applied external voltage due to the variant diffraction efficiency,which further increases the information *** implementation,an artificial neural network(ANN)model is developed to carefully design the phase distribution of each LC *** the advantage of high security,high capacity and simple configuration,our optical secret sharing framework has great potentials in optical encryption and dynamic holographic display.

关键词： holographic encryption optical secret sharing cascaded liquid crystal hologram multi-dimensional multiplexing

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Optically Digitalized Holography: A Perspective for All-Optical Machine Learning

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Engineering 2019年第3期5卷 363-365页

作者： Min Gu xinyuan fang Haoran Ren Elena Goi Laboratory of Artificial-Intelligence Nanophotonics School of Science RMIT University Melbourne VIC 3001 Australia National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China Chair in Hybrid Nanosystems Nanoinstitute Munich Faculty of Physics Ludwig-Maximilians-University Munich Munich 80539 Germany

Holography, which was invented by Dennis Gabor in 1948, offers an approach to reconstructing both the amplitude and phase information of a three-dimensional (3D) object [1]. Since its invention, the concept of holography has been widely used in various fields, such as microscopy [2], interferometry [3], ultrasonography [4], and holographic display [5]. Optical holography can be divided into two steps: recording and reconstruction. A conventional hologram is recorded onto a photosensitive film as the interference between an object beam carrying the 3D object information and a reference beam. Thereafter, the original object wavefront is reconstructed in the 3D image space by illuminating the reference beam on the recorded hologram.

关键词： All-Optical Machine Optically Digitalized Holography

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High-dimensional orbital angular momentum multiplexing nonlinear holography

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Advanced Photonics 2021年第1期3卷 40-46页

作者： xinyuan fang Haocheng Yang Wenzhe Yao Tianxin Wang Yong Zhang Min Gu Min Xiaoa Nanjing University College of Engineering and Applied SciencesSchool of PhysicsNational Laboratory of Solid State MicrostructuresNanjingChina University of Shanghai for Science and Technology School of Optical-Electrical and Computer EngineeringCentre for Artificial-Intelligence NanophotonicsShanghaiChina University of Arkansas Department of PhysicsFayettevilleArkansasUnited States

Nonlinear holography has been identified as a vital platform for optical multiplexing holography because of the appearance of new optical ***,due to nonlinear wave coupling in nonlinear optical processes,the nonlinear harmonic field is coupled with the input field,laying a fundamental barrier to independent control of the interacting fields for *** propose and experimentally demonstrate high-dimensional orbital angular momentum(OAM)multiplexing nonlinear holography to overcome this *** dividing the wavefront of the fundamental wave into different orthogonal OAM channels,multiple OAM and polarization-dependent holographic images in both the fundamental wave and second-harmonic wave have been reconstructed independently in the spatial frequency domain through a type-II second harmonic generation ***,this method can be easily extended to cascadedχ2 nonlinear optical processes for multiplexing in more wavelength channels,leading to potential applications in multicasting in optical communications,multiwavelength display,multidimensional optical storage,anticounterfeiting,and optical encryption.

关键词： orbital angular momentum nonlinear holography second harmonic generation multiplexing holography

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Phyllotaxis bionics for vortex nanosieves

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Light(Science & Applications) 2021年第10期10卷 1818-1818页

作者： Min Gu Yilin Hua and xinyuan fang Institute of Photonic Chips University of Shanghai for Science and Technology200093 ShanghaiChina Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology200093 ShanghaiChina

eLight,1(5),2021 https://***/10.1186/s43593-021-00005-9 Simultaneous generation of multiple optical vortex(OV)lies at the heart of the application for orbital angular momentum(OAM)multiplexing both in classical and quantum *** structure with segmented or interleaved functional sub-areas in a single nano-device has been developed at the cost of its compactness and channel ***-to-nature design inspired by the spiral phyllotaxis pattern in this work offers a fresh way to fabricate a truly space-degenerated nanoscale multipleOVs-generator,namely vortex nanosieves.

关键词： vortex generator momentum

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100 Hertz frame-rate switching threedimensional orbital angular momentum multiplexing holography via cross convolution

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Opto-Electronic Science 2022年第9期1卷 1-10,33-38页

作者： Weijia Meng Yilin Hua Ke Cheng Baoli Li Tingting Liu Qinyu Chen Haitao Luan Min Gu xinyuan fang Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China

The orbital angular momentum(OAM)of light has been implemented as an information carrier in OAM *** information can be multiplexed in theoretical unbounded OAM channels,promoting the applications of optically addressable dynamic display and high-security optical ***,the frame-rate of the dynamic extraction of the information reconstruction process in OAM holography is physically determined by the switching speed of the incident OAM states,which is currently below 30 Hz limited by refreshing rate of the phase-modulation spatial light modulator(SLM).Here,based on a cross convolution with the spatial frequency of the OAM-multiplexing hologram,the spatial frequencies of an elaborately-designed amplitude distribution,namely amplitude decoding key,has been adopted for the extraction of three-dimensional holographic information encoded in a specific OAM information *** experimentally demonstrated a dynamic extraction frame rate of 100 Hz from an OAM multiplexing hologram with 10 information channels indicated by individual OAM values from-50 to *** new concept of cross convolution theorem can even provide the potential of parallel reproduction and distribution of information encoded in many OAM channels at various positions which boosts the capacity of information processing far beyond the traditional decoding ***,our results provide a holographic paradigm for high-speed 3D information processing,paving an unprecedented way to achieve the high-capacity short-range optical communication system.

关键词： orbital-angular-momentum holography multiplexing high frame rate switching cross convolution

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新疆乌鲁木齐市米东区动物疫病检测资源共享平台人才培养项目建设

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现代畜牧科技 2024年第1期 122-124页

作者：许建国彭华刚王涛陈懿李丽郭亚军许芸方新元新疆农业职业技术学院新疆昌吉831100 新疆乌鲁木齐市米东区畜牧兽医站新疆乌鲁木齐831400 新疆乌鲁木齐市动物疾病控制与诊断中心新疆乌鲁木齐830000

随着当前动物疫病发生特点及国家关于兽医社会化服务中第三方兽医检测实验室的推进要求,根据乌鲁木齐米东区牲畜养殖量来衡量,在米东区建设动物疫病检测资源共享平台势在必行。以建设的动物疫病检测资源共享平台为基础,与新疆农业职业... 详细信息

随着当前动物疫病发生特点及国家关于兽医社会化服务中第三方兽医检测实验室的推进要求,根据乌鲁木齐米东区牲畜养殖量来衡量,在米东区建设动物疫病检测资源共享平台势在必行。以建设的动物疫病检测资源共享平台为基础,与新疆农业职业技术学院共同建立产学研实验室基地,开展专业人才培养,提升服务团队成员的专业和素质水平,为乌鲁木齐米东区开展“三农”工作提供强而有力的技术保障体系,提升米东区动物疫病的整体检测能力,为当地畜禽养殖保驾护航,提高养殖效益,助理乡村振兴。

关键词：动物疫病检测共享平台人才培养建设

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铁碳填料预处理硝基苯废水及其抗板结稳定性

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环境工程学报 2024年第2期18卷 371-379页

作者：房乐乐王杰詹欣源岳正波合肥工业大学资源与环境工程学院合肥230000 东华科技股份有限公司合肥230000 安徽省工业废水处理与资源化工程研究中心合肥230000

为了探究铁碳微电解技术对硝基苯废水预处理的稳定性,基于市售的3种铁碳微电解填料构建硝基苯模拟废水的连续处理装置,结合材料表征结果探究了铁碳微电解填料的板结机制,并提出了抗板结功能的结构特征。结果表明:1号、3号填料为烧结型填... 详细信息

为了探究铁碳微电解技术对硝基苯废水预处理的稳定性,基于市售的3种铁碳微电解填料构建硝基苯模拟废水的连续处理装置,结合材料表征结果探究了铁碳微电解填料的板结机制,并提出了抗板结功能的结构特征。结果表明:1号、3号填料为烧结型填料,2号填料为免烧型填料。3种铁碳填料对硝基苯的去除率为20%~40%,其中2号填料具有最高的去除率和最好的稳定性。1号和3号填料在长时间运行过程中产生大量堆积的含铁化合物,影响铁碳微电解的反应界面,从而导致硝基苯的去除率降低。填料抗板结的构型主要受到非铁碳组分骨架的影响,防止剥落的铁碳颗粒堵塞铁碳填料的反应界面,同时铁碳元素空间分布均匀,可为抗板结铁碳填料的制备提供参考。

关键词：铁碳填料硝基苯板结机制抗板结特征

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基于坐标转换的分数轨道角动量探测

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光学仪器 2023年第6期45卷 52-59页

作者：胡晓楠方心远上海理工大学光子芯片研究院上海200093 上海理工大学光电信息与计算机工程学院上海200093

具有轨道角动量(orbital angular momentum,OAM)的涡旋光束因其无穷的空间状态,在经典光学和量子光学中备受关注。近年来,通过引入分数OAM的涡旋光束来增加OAM模式维度的复用能力。然而,如何高效探测分数OAM模式仍然是一个有待解决的问... 详细信息

具有轨道角动量(orbital angular momentum,OAM)的涡旋光束因其无穷的空间状态,在经典光学和量子光学中备受关注。近年来,通过引入分数OAM的涡旋光束来增加OAM模式维度的复用能力。然而,如何高效探测分数OAM模式仍然是一个有待解决的问题。通过逆向设计结合坐标转换的方式对分数OAM模式进行探测。首先,分数OAM模式通过扇形转换调制,得到螺旋相位梯度成倍增加的光场。其次,通过对数转换的转换相位叠加逆向设计的补偿相位调制光场。最后,实现对拓扑荷数间隔为0.1的21阶OAM模式的探测。结果发现,两束复用分数OAM光束经过系统后,光斑能被分开的最小间隔为0.6。同时,系统仍然能保持83%的高衍射效率。这为解决高效率、超高维度的光学处理领域提供了一种有效的方案。

关键词：坐标转换逆向设计分数轨道角动量高衍射效率

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柳杉毛虫对不同寄主植物的选择性及适合度

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森林与环境学报 2023年第2期43卷 217-223页

作者：王静华银方鑫源张珠河鄢继文梁光红福建农林大学林学院福建福州350002 福州市森林病虫害防治检疫站福建福州350003 福建省永泰大湖国有林场福建永泰350700

柳杉毛虫可在不同地区为害不同寄主植物并造成生物灾害,通过观测其行为选择与寄主植物内含物成分,分析柳杉毛虫对不同寄主植物的选择性及适合度。以福建地区的柳杉、柏木、侧柏和马尾松为寄主,分别采用笼养法观测成虫产卵量(E),叶碟法... 详细信息

柳杉毛虫可在不同地区为害不同寄主植物并造成生物灾害,通过观测其行为选择与寄主植物内含物成分,分析柳杉毛虫对不同寄主植物的选择性及适合度。以福建地区的柳杉、柏木、侧柏和马尾松为寄主,分别采用笼养法观测成虫产卵量(E),叶碟法观测初孵幼虫的取食选择频次以及取食量(D),并测定不同寄主针叶中主要营养物质(可溶性糖、可溶性蛋白质、淀粉)及植物次生物质(类黄酮、总酚、单宁)含量。结果表明:无论是产卵量,还是取食选择频次与取食量,柳杉毛虫的选择顺序均为柳杉>柏木>侧柏>马尾松,表明该虫对上述的选择具有一致性。4种寄主适合性指数(I_(F))分别为0.48(柳杉)、0.39(柏木)、0.09(侧柏)和0(马尾松);进一步关联I_(F)、E分析发现,针叶中可溶性糖、可溶性蛋白含量均与I_(F)呈显著正相关(P<0.05),与单宁含量呈显著负相关(P<0.05),表明可溶性蛋白、可溶性糖及单宁含量是柳杉毛虫幼虫优先选择寄主的主要因素。系统聚类可将寄主划分为3类,分别为适宜寄主(柳杉、柏木)、较适宜寄主(侧柏)和不适宜寄主(马尾松),结合I_(F),认为柳杉为最适寄主,马尾松为不适寄主。

关键词：柳杉毛虫寄主选择性寄主适合度柳杉马尾松

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