Multi-wavelength optical information processing systems are commonly utilized in optical neural networks and broadband signal processing.However,their effectiveness is often compromised by frequency-selective response...Multi-wavelength optical information processing systems are commonly utilized in optical neural networks and broadband signal processing.However,their effectiveness is often compromised by frequency-selective responses caused by fabrication,transmission,and environmental factors.To mitigate these issues,this study introduces a deep reinforcement learning calibration(DRC)method inspired by the deep deterministic policy gradient training strategy.This method continuously and autonomously learns from the system,effectively accumulating experiential knowledge for calibration strategies and demonstrating superior adaptability compared to traditional methods.In systems based on dispersion compensating fiber,micro-ring resonator array,and Mach-Zehnder interferometer array that use multiwavelength optical carriers as the light source,the DRC method enables the completion of the corresponding signal processing functions within 21 iterations.This method provides efficient and accurate control,making it suitable for applications such as optical convolution computation acceleration,microwave photonic signal processing,and optical network routing.展开更多
Wave mixing and the intricate optical interactions therein have traditionally been regarded as hallmarks of nonlinear optics.A quintessential example of wave mixing lies in the nonlocal triple correlation between the ...Wave mixing and the intricate optical interactions therein have traditionally been regarded as hallmarks of nonlinear optics.A quintessential example of wave mixing lies in the nonlocal triple correlation between the pump beam and the generated twin photons via spontaneous parametric down-conversion(SPDC).However,the SPDC process typically requires intense laser pumping and suffers from inherently low conversion efficiencies,necessitating single-photon detection.In this work,we establish that analogous triple correlations can be effectively produced using low-power continuous-wave illumination,achieved through a commercially available spatial light modulator(SLM)in a linear optical configuration.Specifically,we show how to spatially manipulate and customize this triple correlation and further investigate the applicability across diverse domains,including pattern recognition,intelligent nonlocal image processing,and sensitivity-enhanced optical metrology.Our findings establish,to our knowledge,a novel framework for classical,linear emulation of quantum and nonlinear optical information processing paradigms rooted in multi-wave mixing.展开更多
Point spread function(PSF)engineering has been pivotal in the remarkable progress made in high-resolution imaging in the last decades.However,the diversity in PSF structures attainable through existing engineering met...Point spread function(PSF)engineering has been pivotal in the remarkable progress made in high-resolution imaging in the last decades.However,the diversity in PSF structures attainable through existing engineering methods is limited.Here,we report universal PSF engineering,demonstrating a method to synthesize an arbitrary set of spatially varying 3D PSFs between the input and output volumes of a spatially incoherent diffractive processor composed of cascaded transmissive surfaces.We rigorously analyze the PSF engineering capabilities of such diffractive processors within the diffraction limit of light and provide numerical demonstrations of unique imaging capabilities,such as snapshot 3D multispectral imaging without involving any spectral filters,axial scanning or digital reconstruction steps,which is enabled by the spatial and spectral engineering of 3D PSFs.Our framework and analysis would be important for future advancements in computational imaging,sensing,and diffractive processing of 3D optical information.展开更多
Reconfigurable linear optical networks based on Mach-Zehnder interferometer(MZI)offer significant potential in optical information processing,particularly in emerging photonic quantum computing systems.However,device ...Reconfigurable linear optical networks based on Mach-Zehnder interferometer(MZI)offer significant potential in optical information processing,particularly in emerging photonic quantum computing systems.However,device losses and calibration errors accumulate as network complexity grows,posing challenges in performing precise mapping of matrix operations.Existing architectures,such as Diamond and Bokun,introduce MZI redundancy into Reck and Clements architectures to improve reliability,which increases complexity and differential path losses that limit scalability.We propose a compact topology architecture that achieves 100%fidelity by employing a symmetrical MZI to decouple optical loss from power ratio and introducing extra MZIs to enforce uniform loss distributions.This multi-level optimization enables direct monitoring pathways while supporting precise calibration,and it approaches theoretical fidelity in practical deployments with direct implications for scalable and fault-tolerant photonic computing systems.展开更多
For conventional optical polarization imaging of underwater target,the polarization degree of backscatter should be pre-measured by averaging the pixel intensities in the no target region of the polarization images,an...For conventional optical polarization imaging of underwater target,the polarization degree of backscatter should be pre-measured by averaging the pixel intensities in the no target region of the polarization images,and the polarization property of the target is assumed to be completely depolarized.When the scattering background is unseen in the field of view or the target is polarized,conventional method is helpless in detecting the target.An improvement is to use lots of co-polarization and cross polarization detection components.We propose a polarization subtraction method to estimate depolarization property of the scattering noise and target signal.And experiment in a quartz cuvette container is performed to demonstrate the effectiveness of the proposed method.The results show that the proposed method can work without scattering background reference,and further recover the target along with smooth surface for polarization preserving response.This study promotes the development of optical polarization imaging systems in underwater environments.展开更多
A method for image encryption using a 1-D joint transform correlator is described. By use of line functions, a 2-D object is encrypted first in one direction, then in the perpendicular direction. The principle of the ...A method for image encryption using a 1-D joint transform correlator is described. By use of line functions, a 2-D object is encrypted first in one direction, then in the perpendicular direction. The principle of the method and experimental results are given.展开更多
It is striking that the quantum Zeno effect can be used to launch a direct counterfactual communication between two spatially separated parties, Alice and Bob. So far, existing protocols of this type only provide a de...It is striking that the quantum Zeno effect can be used to launch a direct counterfactual communication between two spatially separated parties, Alice and Bob. So far, existing protocols of this type only provide a deterministic counterfactual communication service. However, this counterfactuality should be payed at a price. Firstly, the transmission time is much longer than a classical transmission costs. Secondly, the chained-cycle structure makes them more sensitive to channel noises. Here, we extend the idea of counterfactual communication, and present a probabilistic-counterfactual quantum communication protocol, which is proved to have advantages over the deterministic ones. Moreover, the presented protocol could evolve to a deterministic one solely by adjusting the parameters of the beam splitters.展开更多
Optical vortex beams carrying orbital angular momentum(OAM)offer unique advantages in high-dimensional optical information processing.However,in the context of free-space links,the full reconstruction of highdimension...Optical vortex beams carrying orbital angular momentum(OAM)offer unique advantages in high-dimensional optical information processing.However,in the context of free-space links,the full reconstruction of highdimensional OAM spectra remains challenging due to scattering-induced distortions.Here,we employ a residual convolutional neural network with a custom quantum-state-fidelity loss function(QLF-ResNet)that reconstructs and demultiplexes high-dimensional OAM light fields from a single distorted speckle pattern.Specifically,we achieve an average fidelity of 97.2% for nine-dimensional OAM states and maintain fidelity above 91.9%with only 6.25%of original data,illustrating resilience to information loss,thus enabling robust data encoding and multiplexing.For this,we employ high-dimensional OAM encoding to achieve efficient,high-fidelity transmission of RGB images under strong scattering conditions.These results underscore the promise of our current approach for precise OAM state reconstruction in intricate real-world environments,paving the way for advancements in next-generation optical communications.展开更多
The Fourier transform(FT),a cornerstone of optical processing,enables rapid evaluation of fundamental mathematical operations,such as derivatives and integrals.Conventionally,a converging lens performs an optical FT i...The Fourier transform(FT),a cornerstone of optical processing,enables rapid evaluation of fundamental mathematical operations,such as derivatives and integrals.Conventionally,a converging lens performs an optical FT in free space when light passes through it.The speed of the transformation is limited by the thickness and the focal length of the lens.By using the wave nature of surface plasmon polaritons(SPPs),here we demonstrate that the FT can be implemented in a planar configuration with a minimal propagation distance of around 10 mm,resulting in an increase of speed by four to five orders of magnitude.The photonic FT was tested by synthesizing intricate SPP waves with their Fourier components.The reduced dimensionality in the minuscule device allows the future development of an ultrafast on-chip photonic information processing platform for large-scale optical computing.展开更多
基金the National Natural Science Foundation of China(62302504,11902358).
文摘Multi-wavelength optical information processing systems are commonly utilized in optical neural networks and broadband signal processing.However,their effectiveness is often compromised by frequency-selective responses caused by fabrication,transmission,and environmental factors.To mitigate these issues,this study introduces a deep reinforcement learning calibration(DRC)method inspired by the deep deterministic policy gradient training strategy.This method continuously and autonomously learns from the system,effectively accumulating experiential knowledge for calibration strategies and demonstrating superior adaptability compared to traditional methods.In systems based on dispersion compensating fiber,micro-ring resonator array,and Mach-Zehnder interferometer array that use multiwavelength optical carriers as the light source,the DRC method enables the completion of the corresponding signal processing functions within 21 iterations.This method provides efficient and accurate control,making it suitable for applications such as optical convolution computation acceleration,microwave photonic signal processing,and optical network routing.
基金National Natural Science Foundation of China(12274037,11735005,11654003,61675028)Science and Technology Development Fund from Macao SAR(FDCT)(0105/2023/RIA2)Interdiscipline Research Funds of Beijing Normal University。
文摘Wave mixing and the intricate optical interactions therein have traditionally been regarded as hallmarks of nonlinear optics.A quintessential example of wave mixing lies in the nonlocal triple correlation between the pump beam and the generated twin photons via spontaneous parametric down-conversion(SPDC).However,the SPDC process typically requires intense laser pumping and suffers from inherently low conversion efficiencies,necessitating single-photon detection.In this work,we establish that analogous triple correlations can be effectively produced using low-power continuous-wave illumination,achieved through a commercially available spatial light modulator(SLM)in a linear optical configuration.Specifically,we show how to spatially manipulate and customize this triple correlation and further investigate the applicability across diverse domains,including pattern recognition,intelligent nonlocal image processing,and sensitivity-enhanced optical metrology.Our findings establish,to our knowledge,a novel framework for classical,linear emulation of quantum and nonlinear optical information processing paradigms rooted in multi-wave mixing.
文摘Point spread function(PSF)engineering has been pivotal in the remarkable progress made in high-resolution imaging in the last decades.However,the diversity in PSF structures attainable through existing engineering methods is limited.Here,we report universal PSF engineering,demonstrating a method to synthesize an arbitrary set of spatially varying 3D PSFs between the input and output volumes of a spatially incoherent diffractive processor composed of cascaded transmissive surfaces.We rigorously analyze the PSF engineering capabilities of such diffractive processors within the diffraction limit of light and provide numerical demonstrations of unique imaging capabilities,such as snapshot 3D multispectral imaging without involving any spectral filters,axial scanning or digital reconstruction steps,which is enabled by the spatial and spectral engineering of 3D PSFs.Our framework and analysis would be important for future advancements in computational imaging,sensing,and diffractive processing of 3D optical information.
基金supported by the Innovation Program for Quantum Science and Technology(Grant Nos.2021ZD0301400 and 2023ZD0301500)the National Natural Science Foundation of China(Grant Nos.62335019 and 62475291).
文摘Reconfigurable linear optical networks based on Mach-Zehnder interferometer(MZI)offer significant potential in optical information processing,particularly in emerging photonic quantum computing systems.However,device losses and calibration errors accumulate as network complexity grows,posing challenges in performing precise mapping of matrix operations.Existing architectures,such as Diamond and Bokun,introduce MZI redundancy into Reck and Clements architectures to improve reliability,which increases complexity and differential path losses that limit scalability.We propose a compact topology architecture that achieves 100%fidelity by employing a symmetrical MZI to decouple optical loss from power ratio and introducing extra MZIs to enforce uniform loss distributions.This multi-level optimization enables direct monitoring pathways while supporting precise calibration,and it approaches theoretical fidelity in practical deployments with direct implications for scalable and fault-tolerant photonic computing systems.
基金National Natural Science Foundation of China(Nos.11847069,11847127)Science Foundation of North University of China(No.XJJ20180030)。
文摘For conventional optical polarization imaging of underwater target,the polarization degree of backscatter should be pre-measured by averaging the pixel intensities in the no target region of the polarization images,and the polarization property of the target is assumed to be completely depolarized.When the scattering background is unseen in the field of view or the target is polarized,conventional method is helpless in detecting the target.An improvement is to use lots of co-polarization and cross polarization detection components.We propose a polarization subtraction method to estimate depolarization property of the scattering noise and target signal.And experiment in a quartz cuvette container is performed to demonstrate the effectiveness of the proposed method.The results show that the proposed method can work without scattering background reference,and further recover the target along with smooth surface for polarization preserving response.This study promotes the development of optical polarization imaging systems in underwater environments.
文摘A method for image encryption using a 1-D joint transform correlator is described. By use of line functions, a 2-D object is encrypted first in one direction, then in the perpendicular direction. The principle of the method and experimental results are given.
基金Project supported by the National Natural Science Foundation of China(Grant No.61300203)
文摘It is striking that the quantum Zeno effect can be used to launch a direct counterfactual communication between two spatially separated parties, Alice and Bob. So far, existing protocols of this type only provide a deterministic counterfactual communication service. However, this counterfactuality should be payed at a price. Firstly, the transmission time is much longer than a classical transmission costs. Secondly, the chained-cycle structure makes them more sensitive to channel noises. Here, we extend the idea of counterfactual communication, and present a probabilistic-counterfactual quantum communication protocol, which is proved to have advantages over the deterministic ones. Moreover, the presented protocol could evolve to a deterministic one solely by adjusting the parameters of the beam splitters.
基金National Natural Science Foundation of China(12304327)China Postdoctoral Science Foundation(2021M691891)+1 种基金Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515011226,2025A1515011517)Shantou University Scientific Research Initiation Grant(NTF22024).
文摘Optical vortex beams carrying orbital angular momentum(OAM)offer unique advantages in high-dimensional optical information processing.However,in the context of free-space links,the full reconstruction of highdimensional OAM spectra remains challenging due to scattering-induced distortions.Here,we employ a residual convolutional neural network with a custom quantum-state-fidelity loss function(QLF-ResNet)that reconstructs and demultiplexes high-dimensional OAM light fields from a single distorted speckle pattern.Specifically,we achieve an average fidelity of 97.2% for nine-dimensional OAM states and maintain fidelity above 91.9%with only 6.25%of original data,illustrating resilience to information loss,thus enabling robust data encoding and multiplexing.For this,we employ high-dimensional OAM encoding to achieve efficient,high-fidelity transmission of RGB images under strong scattering conditions.These results underscore the promise of our current approach for precise OAM state reconstruction in intricate real-world environments,paving the way for advancements in next-generation optical communications.
基金supported by the National Natural Science Foundation of China 61427819the Ministry of Science and Technology of China under National Basic Research Program of China(973)grant(No.2015CB352004)+4 种基金the Discovery Early Career Researcher Award funded by the Australian Research Council under projects DE120102352 and DE130100954,respectivelysupport from the La Trobe Research Focus Area(RFA)of Understanding Diseases,theMelbourne Collaboration Grant and the Interdisciplinary Seed Fund through theMelbourne Materials Institute(MMI)support from the Defence Science Institute,Australiathe Advanced Optics in Engineering Programme with Grant number 122-360-0009 from the Agency for Science,Technology and Research(A*STAR)and Singapore Ministry of Education Academic Research Fund Tier 3 with Grant number MOE2011-T3-1-005the fellowship support from the A*STAR.
文摘The Fourier transform(FT),a cornerstone of optical processing,enables rapid evaluation of fundamental mathematical operations,such as derivatives and integrals.Conventionally,a converging lens performs an optical FT in free space when light passes through it.The speed of the transformation is limited by the thickness and the focal length of the lens.By using the wave nature of surface plasmon polaritons(SPPs),here we demonstrate that the FT can be implemented in a planar configuration with a minimal propagation distance of around 10 mm,resulting in an increase of speed by four to five orders of magnitude.The photonic FT was tested by synthesizing intricate SPP waves with their Fourier components.The reduced dimensionality in the minuscule device allows the future development of an ultrafast on-chip photonic information processing platform for large-scale optical computing.
