Optics and Laser Technology最新文献_第10页

Hardware-free low-frequency drift compensation method for interferometric fiber-optic vibration sensing 干涉式光纤振动传感的无硬件低频漂移补偿方法

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-30 DOI: 10.1016/j.optlastec.2026.114830

Ke Ai , Cunzheng Fan , Shuolong Zhu , Bin Lu , Wenqi Ren , Junfeng Chen , Zhan Chen , Hao Li , Zhijun Yan , Qizhen Sun

Fiber-optic vibration sensors are crucial for detecting subtle disturbances in applications such as ocean seismic monitoring and structural health assessment. Among various configurations, interferometric fiber-optic sensors offer the advantages of long-range measurement, high dynamic range, and seamless integration into existing telecommunication networks. However, their performance is significantly constrained by laser frequency noise, particularly low-frequency drift, which degrades both sensitivity and signal-to-noise ratio (SNR). To address this issue, a Sampling Matched Integral Fitting Difference (SMIFD) scheme is proposed for low-frequency drift compensation in interferometric fiber-optic vibration sensing systems, leveraging intrinsic system properties and hardware component-free. By synchronizing the sampling rate with the fiber’s transmission delay, the randomly distributed low-frequency noise is transformed into phase drift with discernible time–frequency characteristics through integration. Subsequently, the laser frequency drift can be predicted and mitigated from the phase drift through polynomial fitting. The experimental demonstration shows that SMIFD achieves significant noise floor suppression of 81.49 dB at 10 mHz and a SNR enhancement of 27.02 dB at 200 mHz over a 50 km single-mode fiber link. Furthermore, the down-sampling strategy is used to overcome the sampling rate limitation imposed by the transmission delay, enabling a broadband detection from millihertz to kilohertz range. Experimental results confirm that our method achieves the measurement accuracy required for ocean monitoring applications, even in high-drift conditions, enabling precise detection of low-frequency activities.

在海洋地震监测和结构健康评估等应用中，光纤振动传感器对于检测细微干扰至关重要。在各种配置中，干涉式光纤传感器具有远程测量、高动态范围和与现有电信网络无缝集成的优点。然而，它们的性能明显受到激光频率噪声的限制，特别是低频漂移，这会降低灵敏度和信噪比（SNR）。为了解决这一问题，提出了一种采样匹配积分拟合差分（SMIFD）方案，用于干涉式光纤振动传感系统的低频漂移补偿，利用系统固有特性和无硬件组件。通过将采样率与光纤传输时延同步，将随机分布的低频噪声通过积分转化为具有可识别时频特性的相漂移。随后，通过多项式拟合可以从相位漂移中预测和抑制激光频率漂移。实验证明，在50公里单模光纤链路上，SMIFD在10 mHz时实现了81.49 dB的本底噪声抑制，在200 mHz时实现了27.02 dB的信噪比增强。此外，下采样策略用于克服传输延迟带来的采样率限制，实现从毫赫到千赫兹的宽带检测。实验结果证实，即使在高漂移条件下，我们的方法也能达到海洋监测应用所需的测量精度，能够精确检测低频活动。

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引用次数: 0

Silicon nitride on-chip C-band spontaneous emission generation based on lanthanide doped microparticles 基于镧系掺杂微粒的片上氮化硅c波段自发发射

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-30 DOI: 10.1016/j.optlastec.2026.114834

Dmitry V. Obydennov, Ilya M. Asharchuk, Alexander M. Mumlyakov, Maxim V. Shibalov, Nikolay A. Vovk, Ivan A. Filippov, Lidiya S. Volkova, Michael A. Tarkhov

The integration of active light-emitting elements into planar photonic circuits on a silicon nitride platform remains challenging due to material incompatibilities and high-temperature processing. Proposed hybrid method embeds monodisperse luminescent particles into lithographically defined wells above a 200 nm-thick silicon nitride taper coupler. A fabrication process involving well etching, particle deposition, and planarization enables precise integration while maintaining waveguide integrity. When pumped at 950 nm the particles emit across 1500–1600 nm, peaking at 1532 nm (FWHM 60 nm), covering the optical telecommunication C-band. Numerical simulations yield an average coupling efficiency of 0.25% into the fundamental waveguide mode, suggesting significant potential for further device optimization. The approach provides a scalable route for integrating broadband telecommunications emitters on a silicon nitride platform.

由于材料不兼容和高温处理，在氮化硅平台上将有源发光元件集成到平面光子电路中仍然具有挑战性。提出的混合方法将单分散发光粒子嵌入到200纳米厚的氮化硅锥形耦合器上的光刻定义的井中。包括蚀刻、颗粒沉积和平面化的制造过程可以在保持波导完整性的同时实现精确集成。当泵浦波长为950 nm时，粒子在1500-1600 nm处发射，在1532 nm处达到峰值（FWHM为60 nm），覆盖了光通信c波段。数值模拟表明，基波导模式的平均耦合效率为0.25%，这表明进一步优化器件的潜力很大。该方法为在氮化硅平台上集成宽带电信发射器提供了一种可扩展的途径。

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引用次数: 0

Optimization of process parameters for annular oscillating laser deposited IN625: A numerical and experimental study 环形振荡激光沉积IN625工艺参数的优化：数值与实验研究

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.optlastec.2026.114837

Tao Wang , Yufan Xie , Xinling Song , Guang Yang , Peipei Sun

To address the critical issues of coarse columnar grains, porosity, and Laves phase precipitation caused by rapid solidification in laser melting deposition (LMD) of Inconel 625 (IN625) nickel-based superalloy, this study systematically investigates the influence of annular oscillating laser deposition on the microstructure regulation mechanism and forming quality. By establishing a three-dimensional thermal-fluid coupling numerical model combined with single-track deposition experiments, the synergistic mechanism of laser power and scanning speed on the thermo-fluid behavior of the molten pool and solidification structure was revealed. The results indicate that at a laser power of 1200 W and a scanning speed of 15 mm/s, the Marangoni convection intensity inside the molten pool is moderate (peak flow velocity of 0.61 m/s), and the ratio of temperature gradient to cooling rate (G/R) significantly decreases to 4.32 × 10^4 K·s/m², effectively promoting the transition from columnar to equiaxed crystals. The proportion of equiaxed crystals increases by more than 30%, and the average grain size is refined to 66.5 μm. The combined effects of thermal field homogenization and molten pool stirring induced by annular oscillation are identified as the main reasons for microstructure refinement and defect inhibition. However, excessive heat input (≥1800 W) induces turbulence and spattering, while an excessively high scanning speed (≥18 mm/s) leads to microstructural coarsening and disorder. This study aims to provide a key process window and theoretical basis for high-performance IN625 additive manufacturing.

针对Inconel 625 （IN625）镍基高温合金激光熔覆快速凝固过程中出现的粗柱状晶粒、气孔和Laves相析出等关键问题，系统研究了环形振荡激光熔覆对Inconel 625 （IN625）合金微观组织调控机制和成形质量的影响。通过建立三维热流体耦合数值模型，结合单轨迹沉积实验，揭示了激光功率和扫描速度对熔池热流体行为和凝固组织的协同作用机制。结果表明：当激光功率为1200 W，扫描速度为15 mm/s时，熔池内的Marangoni对流强度适中（峰值流速为0.61 m/s），温度梯度与冷却速率之比（G/R）显著减小至4.32 × 10^4 K·s/m2，有效地促进了柱状晶向等轴晶的转变；等轴晶的比例增加了30%以上，平均晶粒尺寸细化到66.5 μm。热场均匀化和环形振荡引起的熔池搅拌的共同作用是导致组织细化和缺陷抑制的主要原因。然而，过大的热输入（≥1800 W）会导致湍流和溅射，过高的扫描速度（≥18 mm/s）会导致显微组织粗化和无序。本研究旨在为高性能IN625增材制造提供关键的工艺窗口和理论基础。

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引用次数: 0

Objective detection for boundary noise of low-light-level image intensifiers based on Gaussian differential filtering and shape similarity calculation 基于高斯差分滤波和形状相似度计算的微光图像增强器边界噪声客观检测

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-29 DOI: 10.1016/j.optlastec.2026.114790

Luzi Wang, Shuai Tan, Ting Cao

Boundary noise is a common defect that appears on the fluorescent screen during the manufacturing stage of low-light-level (LLL) image intensifiers. Its existence will affect the imaging quality of the product, so it should be detected in time before delivery. The traditional detection approach for such defects is based on visual observation, the disadvantages are strong uncertainty and non-standard detection means. To address above problems, an objective detection method based on Gaussian differential filtering and shape similarity calculation is proposed, consisting of regular defect removal and boundary noise evaluation. Regular defect removal is to detect high-contrast regular defects in the target image based on the Gaussian differential filtering, and then replace them with invalid image blocks. Boundary noise evaluation first extracts low-contrast linear defects by sequentially performing sliding window scanning, edge detection, and shape similarity calculation on the effective area. Then, boundary noise is identified by analyzing the azimuth consistency of the above linear defects. Finally, boundary noise is objectively evaluated based on existing relevant strategies. The experimental results show that the selected defect detection technology performs better than traditional relevant approaches, achieving an average detection accuracy of 94% during batch testing. To verify the superiority of the presented shape similarity calculation strategy, state-of-the-art relevant technologies are compared. The results show that the calculation results of our strategy are most in line with the actual situation. The boundary noise detection experiment demonstrates that the proposed method can produce results consistent with reality and has higher repeatability than the traditional visual inspection method.

边界噪声是荧光屏在微光像增强器制造过程中出现的常见缺陷。它的存在会影响产品的成像质量，所以在发货前要及时检测。传统的缺陷检测方法是基于视觉观察，其缺点是不确定性强，检测手段不规范。针对上述问题，提出了一种基于高斯微分滤波和形状相似度计算的目标检测方法，包括规则缺陷去除和边界噪声评价。规则缺陷去除是基于高斯差分滤波，检测出目标图像中高对比度的规则缺陷，并用无效的图像块进行替换。边界噪声评估首先通过对有效区域依次进行滑动窗口扫描、边缘检测和形状相似度计算来提取低对比度的线性缺陷。然后，通过分析上述线性缺陷的方位角一致性来识别边界噪声。最后，在现有相关策略的基础上，对边界噪声进行客观评价。实验结果表明，所选择的缺陷检测技术优于传统的相关方法，在批量测试中平均检测准确率达到94%。为了验证所提出的形状相似度计算策略的优越性，对目前的相关技术进行了比较。结果表明，本文策略的计算结果最符合实际情况。边界噪声检测实验表明，与传统的视觉检测方法相比，该方法能够产生与实际相符的结果，具有较高的重复性。

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引用次数: 0

Dispersion engineering in Sol-Gel coated silica Microspheres: From normal to anomalous dispersion for broadband Kerr frequency comb generation 溶胶-凝胶包覆二氧化硅微球的色散工程：宽带克尔频率梳的正常色散到异常色散

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-28 DOI: 10.1016/j.optlastec.2026.114826

Ruiji Dong , Jun-an Li , Fang-Jie Shu , Qijing Lu

Optical frequency combs (OFCs) based on microresonators with whispering-gallery modes offer several advantages, such as compact size, low power consumption, and simplified generation systems. These characteristics make OFCs highly suitable for applications in optical communications, bioimaging, and optical sensing. However, in small microsphere resonators (< 150 μm) operating in the C-band, the inherent geometric normal dispersion cannot be effectively compensated by material dispersion, thereby hindering OFC generation. In this study, we numerically investigated a silica microsphere resonator coated with a low-refractive-index thin film and calculated the dispersion characteristics of the first two radial modes across varying film thicknesses. The simulations demonstrate that by adjusting the film thickness from 0 to 1.2 μm, the zero-dispersion wavelength can be blue-shifted by up to 600 nm, and the group velocity dispersion curve can be effectively flattened. This allows for precise dispersion engineering of the microsphere, enabling anomalous dispersion over a broad wavelength range. Experimentally, we fabricated a 120 μm-diameter silica microsphere resonator coated with a ZrO₂-SiO₂ thin film via the sol–gel method, achieving an anomalous dispersion window. A broadband OFC with a spectral span exceeding 400 nm was generated using a single 1550 nm pump laser. The experimental results closely matched the simulations, validating the proposed approach. This work addresses the key challenge of dispersion control in miniaturized microsphere resonators and establishes a viable strategy for realizing chip-integrated frequency combs in the communication band.

基于微谐振器的光学频率梳（OFCs）具有低语通道模式，具有体积小，功耗低，发电系统简化等优点。这些特性使得OFCs非常适合于光通信、生物成像和光传感等领域的应用。然而，在c波段工作的小型微球谐振器（< 150 μm）中，固有的几何法向色散不能被材料色散有效补偿，从而阻碍了OFC的产生。在这项研究中，我们数值研究了涂覆低折射率薄膜的二氧化硅微球谐振器，并计算了前两个径向模式在不同薄膜厚度上的色散特性。仿真结果表明，在0 ~ 1.2 μm范围内调整薄膜厚度，可使零色散波长蓝移达600 nm，使群速度色散曲线有效平坦化。这允许微球的精确色散工程，实现在宽波长范围内的异常色散。实验上，我们采用溶胶-凝胶法制备了直径为120 μm的二氧化硅微球谐振腔，并包覆了ZrO2-SiO2薄膜，实现了异常色散窗口。利用单个1550 nm泵浦激光器产生了光谱跨度超过400 nm的宽带OFC。实验结果与仿真结果吻合较好，验证了该方法的有效性。这项工作解决了微型化微球谐振器色散控制的关键挑战，并建立了在通信频段实现芯片集成频率梳的可行策略。

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引用次数: 0

Lensless autofocusing based on symmetric diffraction shifts for high-throughput whole-slide imaging 基于对称衍射偏移的无透镜自动聚焦高通量全片成像

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-28 DOI: 10.1016/j.optlastec.2026.114823

Huazheng Wu , Wanjie Tang , Yangchen Cai , Tianhao Cao , Xingru Huang , Jiaju Wu , Jiyong Zhang , Wei Wu , Shaowei Jiang , Chengfei Guo

Autofocusing is a major bottleneck in high-throughput whole-slide imaging (WSI), where high-NA objectives provide submicron resolution but only micrometer-scale depth of field. Conventional mechanical autofocusing requires dense Z-stack acquisition and precise motion control, which severely limits scanning throughput and increases system cost. Here, we present a two-shot lensless autofocusing method that replaces axial search with computational estimation from symmetric diffraction shifts. Using a programmable LED array, the sample is illuminated from two symmetric angles and two lensless diffraction images are captured. The lateral displacement between the two diffraction patterns is estimated by phase correlation and mapped to axial defocus through a calibrated linear model, enabling the reconstruction of a full-field focus map from only two frames. To ensure global focus consistency, we incorporate a four-corner plane-rectification procedure based on Rodrigues rotation to compensate for tilt and curvature introduced by turret switching and sample mounting. Experiments on multiple tissue types and staining conditions confirm a universal linear displacement–defocus relationship. Across four independent specimens, the proposed method achieves a mean absolute focus error of 0.56 µm, well within the 0.8 µm depth of field of a 20×/0.75NA objective, while improving focusing throughput by more than two orders of magnitude compared with mechanical Z-stack autofocusing. Whole-slide imaging of H&E- and IHC-stained samples further demonstrates the robustness and practicality of the approach. The proposed framework offers a compact, low-cost, and physically interpretable autofocusing solution for digital pathology systems.

自动对焦是高通量全幻灯片成像（WSI）的主要瓶颈，其中高na物镜提供亚微米分辨率，但仅提供微米级的景深。传统的机械自动对焦需要密集的Z-stack采集和精确的运动控制，这严重限制了扫描吞吐量并增加了系统成本。在这里，我们提出了一种双镜头无透镜自动对焦方法，用对称衍射位移的计算估计取代轴向搜索。使用可编程LED阵列，从两个对称角度照射样品并捕获两个无透镜衍射图像。通过相位相关估计两种衍射模式之间的横向位移，并通过校准的线性模型映射到轴向离焦，从而可以仅从两帧图像中重建全场焦点图。为了保证全局焦点的一致性，我们采用了一个基于罗德里格斯旋转的四角平面校正程序来补偿炮塔切换和样品安装带来的倾斜和曲率。在多种组织类型和染色条件下的实验证实了一种普遍的线性位移-离焦关系。在四个独立的样本中，该方法的平均绝对聚焦误差为0.56µm，完全在20×/0.75NA物镜的0.8µm景深范围内，同时与机械z堆叠自动对焦相比，提高了两个数量级以上的对焦吞吐量。H&；E和ihc染色样品的全切片成像进一步证明了该方法的鲁棒性和实用性。提出的框架为数字病理系统提供了一个紧凑、低成本和物理可解释的自动聚焦解决方案。

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引用次数: 0

Shallow-etched tilted nano-gratings and bridge waveguide assisted silicon polarizing beam splitter 浅蚀刻倾斜纳米光栅与桥波导辅助硅极化分束器

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-28 DOI: 10.1016/j.optlastec.2026.114825

Zhihua Feng , Haipeng Liu , Xiange Han , Hongju Guo , Cunliang Yang , Jingjing Wang , Zhiheng Yu , Xiang Li , Junhao Li , Xinbo Chu , Jijun Feng

By utilizing the anisotropy of tilted gratings, a broadband and high manufacturing tolerance silicon polarizing beam splitter is demonstrated based on shallowly etched gratings. The tilt angle causes the grating wave vector to produce different components in the transverse and longitudinal directions. The transverse momentum component is strongly coupled only with the transverse electric (TE) mode, resulting in its radiation leakage at the cross port and almost lossless transmission at the through port; while the transverse magnetic (TM) mode is almost unaffected by the longitudinal electric field distribution and maintains low-loss transmission at the cross port. TE or TM light can theoretically achieve an extinction ratio of 39.96 or 27.61 dB at a wavelength of 1550 nm, respectively. The fabricated device with a coupling length of 25.34 μm can achieve an extinction ratio of 25.41 dB for TM light or 25.07 dB for TE light with a low excess loss. An extinction ratio of more than 20 dB can be realized in the wavelength range from 1525 to 1610 nm for both polarizations, which is beneficial for applications in coherent optical communications, sensing or quantum information processing.

利用倾斜光栅的各向异性，提出了一种基于浅刻蚀光栅的宽带、高制造公差的硅极化分束器。倾斜角度使光栅波矢量在横向和纵向上产生不同分量。横向动量分量仅与横向电（TE）模式强耦合，导致其辐射在横口处泄漏，在通口处几乎无损传输；而横磁（TM）模式几乎不受纵向电场分布的影响，在交叉端口处保持低损耗传输。理论上，TE光和TM光在1550 nm波长处的消光比分别为39.96和27.61 dB。该器件的耦合长度为25.34 μm，对TM光的消光比为25.41 dB，对TE光的消光比为25.07 dB，并且具有较低的过量损耗。在1525 ~ 1610 nm波长范围内均可实现20 dB以上的消光比，有利于相干光通信、传感或量子信息处理等领域的应用。

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引用次数: 0

Impact of pulse characteristics on the sensing spatial resolution for Raman distributed optical fiber sensors 脉冲特性对拉曼分布式光纤传感器传感空间分辨率的影响

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-28 DOI: 10.1016/j.optlastec.2026.114824

Yang Xu , Xinyu Han , Xuanbing Qiu , Chuanliang Li , Jian Li , Mingjiang Zhang

Raman distributed optical fiber sensors can be applied to the real-time distributed measurement of the temperature along the sensing fiber. The sensing spatial resolution of Raman distributed optical fiber sensors is a key property. Firstly, the paper examines the impact of pulse energy time-domain distribution characteristics on the sensing spatial resolution. The relationship between effective pulse width and sensing spatial resolution in pulse with arbitrary energy distribution is investigated through experimental analysis. Then, this study examines the effect of pulse spectral linewidth on sensing spatial resolution. The experimental evidence indicates that the reduction in sensing spatial resolution with increasing sensing distance is predominantly attributable to the dispersion of Raman anti-Stokes light, rather than the dispersion of the input pulse. Finally, the equation of Raman anti-Stokes scattering signal in timing is theoretically reconstructed. These conclusions provide a theoretical basis for technical solutions to improve the sensing spatial resolution by optimizing the timing characteristics of the pulse source and for the optimization and compensation of Raman anti-Stokes light dispersion.

拉曼分布式光纤传感器可以应用于沿传感光纤的温度实时分布测量。拉曼分布式光纤传感器的传感空间分辨率是其关键性能之一。首先，研究了脉冲能量时域分布特性对传感空间分辨率的影响。通过实验分析，研究了任意能量分布脉冲的有效脉宽与传感空间分辨率的关系。然后，研究了脉冲谱线宽度对感知空间分辨率的影响。实验证据表明，随着传感距离的增加，传感空间分辨率的降低主要是由于拉曼反斯托克斯光的色散，而不是输入脉冲的色散。最后，从理论上重构了时序拉曼反斯托克斯散射信号的方程。这些结论为通过优化脉冲源时序特性来提高传感空间分辨率的技术解决方案以及拉曼反斯托克斯光色散的优化和补偿提供了理论基础。

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引用次数: 0

All-optically controlled terahertz memristor for multidimensional neuromorphic computing 用于多维神经形态计算的全光控太赫兹记忆电阻器

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-28 DOI: 10.1016/j.optlastec.2026.114807

Weien Lai , Shenglian Lan , Xiaolong Liang , Yichen Gan , Runqing Huang , Chengzhu Liao , Huili Li , Abbas Amini , Chun Cheng

Optically controlled memristors are considered as promising components for optical computing and storage functions, which can revolutionize operational efficiency and information transmission security in the next generation of artificial intelligence (AI) systems. Here, we present a neuromorphic all-optically controlled terahertz memristor (AOCTM) based on vanadium dioxide nanowires/polydimethylsiloxane (VO₂ NWs/PDMS), which possesses all-optical storage and processing for multi-dimensional optical computing terahertz (THz) systems. This memristor with near-infrared (NIR) optical synaptic plasticity, short-term plasticity (STP), and long-term plasticity (LTP) can mimic artificial synapses, arising from thermal hysteresis and photothermal effect. An imaging encryption method using AOCTM is proposed to enhance data security for all-optical communication links. Moreover, when integrated with the array AOCTM and artificial neural networks, the all-optical computational strategy for image recognition can significantly upgrade the recognition rate to 93.5% under 57% Gaussian noise. Our work provides a master direction for advancing multi-dimensional optical AI computing.

光控忆阻器被认为是下一代人工智能（AI）系统中具有革命性的操作效率和信息传输安全性的光计算和存储功能的有前途的组件。在这里，我们提出了一种基于二氧化钒纳米线/聚二甲基硅氧烷（VO2 NWs/PDMS）的神经形态全光控太赫兹记忆电阻器（AOCTM），它具有全光存储和处理多维光计算太赫兹（THz）系统。该忆阻器具有近红外（NIR）光突触可塑性、短期可塑性（STP）和长期可塑性（LTP），可以模拟人工突触，由热滞后和光热效应引起。为了提高全光通信链路的数据安全性，提出了一种基于AOCTM的图像加密方法。此外，当与阵列AOCTM和人工神经网络相结合时，图像识别的全光计算策略可以在57%高斯噪声下将识别率显著提高到93.5%。我们的工作为推进多维光学人工智能计算提供了一个主要方向。

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引用次数: 0

A high performance deep learning based single-pixel image reconstruction framework integrating the U-Net structure with improved Mamba modules 一种高性能的基于深度学习的单像素图像重建框架，集成了U-Net结构和改进的Mamba模块

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.optlastec.2026.114781

Shaowei Feng, Lieshan Zhang, Yang Yang, Qinhao Xu, Yuanchao Hu

In order to address the limitations of insufficient reconstruction quality and low imaging efficiency in single-pixel imaging (SPI) under undersampled conditions, this paper proposes a hybrid deep learning network that integrates the U-Net structure with Mamba modules, termed UMSPI (U-Mamba Single-Pixel Imaging). The proposed method utilizes the local feature restoration capability of U-Net and the long-range dependency modeling ability of the Mamba architecture by embedding Mamba modules in both the encoder and decoder stages. This approach enables joint modeling of global and local features. To maintain spatial continuity and enhance sequence correlation, UMSPI introduces a compound s-shaped displacement scanning (CSDS) strategy and a sequence shuffle attention (SSA) mechanism within the Mamba modules. This enables the model to adaptively aggregate global information from different scanning sequences during the reconstruction process. Numerical simulation and single-pixel imaging experiments were carried out to investigate the performance of the proposed image reconstruction framework. The simulation results show that at sampling rates of 5%, 10% and 20%, the proposed UMSPI method achieves a higher peak signal-to-noise ratio (PSNR) and structural similarity index (SSIM) than the traditional CS-TV algorithm and existing deep learning-based SPI approaches, including RNN, U-Net and its variants, Transformer, and CMSPI. Moreover, UMSPI maintains relatively low computational complexity and reconstruction time. Experimental results on both 2D and 3D targets further confirm its ability to produce clear and structurally consistent reconstructions, demonstrating superior robustness and generalization.

为了解决欠采样条件下单像素成像（SPI）重建质量不足和成像效率低的局限性，本文提出了一种将U-Net结构与Mamba模块相结合的混合深度学习网络，称为UMSPI （U-Mamba single-pixel imaging）。该方法利用U-Net的局部特征恢复能力和Mamba体系结构的远程依赖建模能力，在编码器和解码器阶段同时嵌入Mamba模块。这种方法支持对全局和局部特征进行联合建模。为了保持空间连续性和增强序列相关性，UMSPI在Mamba模块中引入了复合s形位移扫描（CSDS）策略和序列洗洗注意（SSA）机制。这使得该模型能够在重建过程中自适应地聚合来自不同扫描序列的全局信息。通过数值模拟和单像素成像实验对所提出的图像重建框架的性能进行了研究。仿真结果表明，在5%、10%和20%的采样率下，所提出的UMSPI方法比传统的CS-TV算法和现有的基于深度学习的SPI方法（包括RNN、U-Net及其变体、Transformer和CMSPI）具有更高的峰值信噪比（PSNR）和结构相似性指数（SSIM）。此外，UMSPI保持了相对较低的计算复杂度和重建时间。在二维和三维目标上的实验结果进一步证实了该方法能够产生清晰且结构一致的重建，显示出优越的鲁棒性和泛化能力。

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引用次数: 0