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Long distance all-optical logic operations through a single multimode fiber empowered by wavefront shaping

Photonics Research 2024年第3期12卷 587-597页

作者： ZHIPENG YU TIANTING ZHONG HUANHAO LI HAORAN LI CHI MAN WOO shengfu cheng SHUMING JIAO HONGLIN LIU CHAO LU PUXIANG LAI Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000China Peng cheng Laboratory Shenzhen 518055China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Photonics Research Institute The Hong Kong Polytechnic UniversityHong Kong SARChina

Multimode fibers(MMFs)are a promising solution for high-throughput signal transmission in the time ***,crosstalk among different optical modes within the MMF scrambles input information and creates seemingly random speckle patterns at the *** characterize this process,a transmission matrix(TM)can be used to relate input and output *** innovations use TMs to manipulate the output field by shaping the input wavefront for exciting advances in deep-brain imaging,neuron stimulation,quantum networks,and analog ***,these approaches consider input/output segments as independent,limiting their use for separate signal processing,such as logic *** proposed method,which makes input/output segments as interdependent,adjusts the phase of corresponding output fields using phase bias maps superimposed on input *** superposition enables signal logic operations through a 15-m-long *** experiments,a single optical logic gate containing three basic logic functions and cascading multiple logic gates to handle binary operands is *** operations are performed for multi-bit logic operations,and multiple optical logic gates are reconstructed simultaneously in a single logic gate with polarization *** proposed method may open new avenues for long-range logic signal processing and transmission via MMFs.

关键词： optical polarization fiber

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基于相干光调控的无透镜光纤成像及其应用(特邀)

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激光与光电子学进展 2024年第6期61卷 25-53页

作者：程圣福仲天庭胡子敏李浩然赖溥祥香港理工大学生物医学工程学系中国香港香港理工大学光子技术研究院中国香港香港理工大学深圳研究院广东深圳518063

基于多模光纤或多芯光纤的无透镜超细光纤内窥成像技术近些年获得了快速发展,有望成为下一代的极微创、高分辨率内窥显微镜。通过对相干入射光场的时空调控,该技术可克服多模光纤中模式色散或多芯光纤中相位畸变的影响,在无需光纤末端... 详细信息

基于多模光纤或多芯光纤的无透镜超细光纤内窥成像技术近些年获得了快速发展,有望成为下一代的极微创、高分辨率内窥显微镜。通过对相干入射光场的时空调控,该技术可克服多模光纤中模式色散或多芯光纤中相位畸变的影响,在无需光纤末端透镜或扫描器件的情况下实现高分辨率的聚焦、成像及相关应用。此外,在无透镜光纤内窥成像或图像传输等场景下,通过构建物理或深度学习模型,从光纤输出测量中也能实现物体信息重建。对相干光纤无透镜成像技术的发展进行综述,首先说明无透镜光纤成像的基础原理,并从主动波前调控和被动目标重建这两类角度阐述无透镜光纤成像方法,接着介绍一些先进光纤成像模态和技术,列举光纤成像相关应用,最后分析该领域所面临的挑战,总结并展望其进一步发展方向和应用前景。

关键词：多模光纤多芯光纤波前整形内窥成像光学显微成像深度学习

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Artificial intelligence assisted light control and computational imaging through scattering media

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Journal of Innovative Optical Health Sciences 2019年第4期12卷 32-45页

作者： shengfu cheng Huanhao Li Yunqi Luo Yuanjin Zheng Puxiang Lai Department of Biomedical Engineering Hong Kong Polytechnic University Hong Kong SAR College of Material Science and Engineering Sichuan University SichuanP.R.China School of Electrical and Electronic Engineering Nanyang Technological University Singapore

Coherent optical control within or through scattering media via wavefront shaping has seen broad applications since its invention around *** shaping is aimed at overcoming the strong scattering,featured by random interference,namely speckle *** randomness occurs due to the refractive index inhomogeneity in complex media like biological tissue or the modal dispersion in multimode fiber,yet this randomness is actually deterministic and potentially can be time reversal or *** wavefront shaping approaches,such as optical phase conjugation,iterative optimization,and transmission matrix measurement,have been developed to generate tight and intense optical delivery or high-resolution image of an optical object behind or within a scattering *** performance of these modula-tions,however,is far from *** recently,artifcial intelligence has brought new inspirations to this field,providing exciting hopes to tackle the challenges by mapping the input and output optical patterns and building a neuron network that inherently links *** this paper,we survey the developments to date on this topic and briefly discuss our views on how to harness machine learning(deep learning in particular)for further advancements in the field.

关键词： Optical scattering deep learning wavefront shaping adaptive optics computational imaging

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Towards ideal focusing of diffused light via optical wavefront shaping

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Advanced Photonics 2023年第2期5卷 3-5页

作者： Huanhao Li Zhipeng Yu Tianting Zhong shengfu cheng Puxiang Lai Hong Kong Polytechnic University Department of Biomedical EngineeringHong KongChina Hong Kong Polytechnic University Shenzhen Research InstituteShenzhenChina Hong Kong Polytechnic University Photonics Research InstituteHong KongChina

Multiple scattering can significantly scramble the amplitude and phase profile of an optical *** obscures subtle observations but only speckle patterns can be seen,unlike the ballistic regime where the information or the optical field can be identified with limited *** optical manipulation including information transmission and precise focusing is therefore obstructed as light travels deep into turbidmedia such as fog,turbid fluids,and biological tissues.

关键词： field precise speckle

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深层生物组织光学技术发展及其应用(特邀)

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中国激光 2024年第1期51卷 330-353页

作者：赖溥祥赵麒周颖颖程圣福胡子敏李焕浩余志鹏黄夏子姚靖庞未然李浩然黄浩梵李文钊郑源东王志远袁楚琪仲天庭香港理工大学生物医学工程系中国香港九龙999077 香港理工大学深圳研究院广东深圳518055 香港理工大学光子技术研究院中国香港九龙999077 香港理工大学体育科技研究院中国香港九龙999077

光学技术在生物医学中扮演着越来越重要的角色,其非电离辐射、高分辨率、高对比度和对生物组织异变高度灵敏等特性使其非常适用于生物组织的研究,包括成像、传感、治疗、刺激以及控制等。然而由于光折射因子在生物组织中的分布是不均匀... 详细信息

光学技术在生物医学中扮演着越来越重要的角色,其非电离辐射、高分辨率、高对比度和对生物组织异变高度灵敏等特性使其非常适用于生物组织的研究,包括成像、传感、治疗、刺激以及控制等。然而由于光折射因子在生物组织中的分布是不均匀的,光在生物组织中的传播会受到很强的散射影响,故纯光学技术的穿透深度和空间分辨率是“鱼和熊掌不可兼得”;高分辨率光学成像应用仅限于样品浅表层,当成像深度增加时分辨率急剧下降。实现光在深层生物组织里的高分辨率成像或应用是人们期盼已久的目标。近年来,为解决这一问题,研究者提出了不同的方法,例如切换到更长的光波长以减小组织散射系数,在信号检测时将漫射光转换为散射不明显的超声信号,逆转或者预先补偿由光的多次散射所带来的相位畸变,或借助光纤等微创光学通道实现深层生物组织的高分辨率光学成像、刺激等。基于团队在深层生物组织光学相关领域多年的耕耘,从光在生物组织中的传播特性出发,梳理和总结了近年来研究人员在光-声结合和光学波前整形技术等方面展开的诸多探索,以及在生物组织操控、成像、光学计算以及人工智能等领域中的应用尝试。虽然尚有诸多不足,但随着硬件设备的更新和计算技术的发展,在不远的将来有望实现活体深层生物组织光学高分辨率应用。在这一求索过程中,新方法和新能力将不断激发新的应用灵感,为光学尤其是生物医学光子学带来全新的理念和机遇。

关键词：生物光学光学成像生物医学光子学深层组织光学波前整形光声成像

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Physical origin and boundary of scalable imaging through scattering media:a deep learning-based exploration

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Photonics Research 2023年第6期11卷 1038-1046页

作者： XUYU ZHANG shengfu cheng JINGJING GAO YU GAN CHUNYUAN SONG DAWEI ZHANG SONGLIN ZHUANG SHENSHENG HAN PUXIANG LAI HONGLIN LIU School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Photonics Research Institute The Hong Kong Polytechnic UniversityHong Kong SARChina

Imaging through scattering media is valuable for many areas,such as biomedicine and *** progress enabled by deep learning(DL)has shown superiority especially in the model ***,there is a lack of research to physically reveal the origin or define the boundary for such model scalability,which is important for utilizing DL approaches for scalable imaging despite scattering with high *** this paper,we find the amount of the ballistic light component in the output field is the prerequisite for endowing a DL model with generalization capability by using a“one-to-all”training strategy,which offers a physical meaning invariance among the multisource *** findings are supported by both experimental and simulated tests in which the roles of scattered and ballistic components are revealed in contributing to the origin and physical boundary of the model ***,the generalization performance of the network is enhanced by increasing the portion of ballistic photons in *** mechanism understanding and practical guidance by our research are beneficial for developing DL methods for descattering with high adaptivity.

关键词： generalization boundary media

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Learning-based super-resolution interpolation for sub-Nyquist sampled laser speckles

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Photonics Research 2023年第4期11卷 631-642页

作者： HUANHAO LI ZHIPENG YU QI ZHAO YUNQI LUO shengfu cheng TIANTING ZHONG CHI MAN WOO HONGLIN LIU LIHONG V.WANG YUANJIN ZHENG PUXIANG LAI Department of Biomedical Engineering Hong Kong Polytechnic UniversityHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518063China School of Electrical and Electronics Engineering Nanyang Technological UniversitySingapore 639798Singapore Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringCalifornia Institute of TechnologyPasadenaCalifornia 91125USA Photonics Research Institute Hong Kong Polytechnic UniversityHong KongChina

Information retrieval from visually random optical speckle patterns is desired in many scenarios yet considered *** requires accurate understanding or mapping of the multiple scattering process,or reliable capability to reverse or compensate for the scattering-induced phase *** whatever situation,effective resolving and digitization of speckle patterns are ***,on some occasions,to increase the acquisition speed and/or signal-to-noise ratio(SNR),speckles captured by cameras are inevitably sampled in the sub-Nyquist domain via pixel binning(one camera pixel contains multiple speckle grains)due to finite size or limited bandwidth of *** a down-sampling process is irreversible;it undermines the fine structures of speckle grains and hence the encoded information,preventing successful information *** retrace the lost information,super-resolution interpolation for such sub-Nyquist sampled speckles is *** this work,a deep neural network,namely SpkSRNet,is proposed to effectively up sample speckles that are sampled below 1/10 of the Nyquist criterion to well-resolved ones that not only resemble the comprehensive morphology of original speckles(decompose multiple speckle grains from one camera pixel)but also recover the lost complex information(human face in this study)with high fidelity under normal-and low-light conditions,which is impossible with classic interpolation *** successful speckle super-resolution interpolation demonstrations are essentially enabled by the strong implicit correlation among speckle grains,which is non-quantifiable but could be discovered by the well-trained *** further engineering,the proposed learning platform may benefit many scenarios that are physically inaccessible,enabling fast acquisition of speckles with sufficient SNR and opening up new avenues for seeing big and seeing clearly simultaneously in complex scenarios.

关键词： speckle interpolation hence

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韶钢4^#烧结机烟气脱硫生产实践

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工业安全与环保 2010年第8期36卷 21-22页

作者：张建桂程胜福广东韶关钢铁集团有限公司炼铁部烧结分厂广东曲江512123

介绍了韶钢4#烧结机系统的脱硫原理、工艺流程和生产情况,就存在的问题进行了改进并取得了良好的效果。

关键词：烧结机烟气脱硫脱硫塔

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韶钢105m^2烧结机技术改造及效果

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河南冶金 2007年第1期15卷 27-28,37页

作者：程胜福广东省韶关钢铁集团有限公司

介绍了韶钢烧结厂对105m2烧结机系统进行的一系列技术改造情况。通过技改烧结机的产能得到释放,烧结矿的各项技术经济指标得到改善,取得了预期效果。

关键词：烧结机技术改造技术经济指标

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Wavefront shaping: A versatile tool to conquer multiple scattering in multidisciplinary fields

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The Innovation 2022年第5期3卷 80-94页

作者： Zhipeng Yu Huanhao Li Tianting Zhong Jung-Hoon Park shengfu cheng Chi Man Woo Qi Zhao Jing Yao Yingying Zhou Xiazi Huang Weiran Pang Hansol Yoon Yuecheng Shen Honglin Liu Yuanjin Zheng YongKeun Park Lihong V.Wang Puxiang Lai Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518052China Department of Biomedical Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea Tomocube Daejeon 34109Republic of Korea Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang Avenue201800 SingaporeSingapore Department of Physics Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea KAIST Institute for Health Science and Technology KAISTDaejeon 34141Republic of Korea Department of Medical Engineering California Institute of TechnologyPasadenaCA 91125USA Department of Electrical Engineering California Institute of TechnologyPasadenaCA 91125USA Photonics Research Institute The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

Optical techniques offer a wide variety of applications as light-matter interactions provide extremely sensitive mechanisms to probe or treat target *** of these implementations rely on the usage of ballistic or quasi-ballistic photons to achieve high spatial ***,the inherent scattering nature of light in biological tissues or tissue-like scattering media constitutes a critical obstacle that has restricted the penetration depth of non-scattered photons and hence limited the implementation of most optical techniques for wider *** addition,the components of an optical system are usually designed and manufactured for a fixed function or *** advances in wavefront shaping have demonstrated that scattering-or component-induced phase distortions can be compensated by optimizing the wavefront of the input light pattern through iteration or by conjugating the transmission matrix of the scattering medium.

关键词： versatile hence iteration

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