Optics and Laser Technology最新文献_第3页

Spatial-frequency-division-multiplexed edge-core Bragg grating Fabry-Perot interferometer for biaxial inclination sensing 用于双轴倾角传感的空间频分复用边芯布拉格光栅法布里-珀罗干涉仪

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.optlastec.2026.114909

Benyue Li , Daryl Tan , Kok-Sing Lim , Shufeng Sun , Fengyi Chen

{"title":"Spatial-frequency-division-multiplexed edge-core Bragg grating Fabry-Perot interferometer for biaxial inclination sensing","authors":"Benyue Li , Daryl Tan , Kok-Sing Lim , Shufeng Sun , Fengyi Chen","doi":"10.1016/j.optlastec.2026.114909","DOIUrl":"10.1016/j.optlastec.2026.114909","url":null,"abstract":"<div><div>A novel three-reflector fibre Bragg grating Fabry–Perot interferometer (3R-FPI) based on femtosecond (fs) laser direct writing is proposed and experimentally demonstrated for inclination angle detection. The sensor structure consists of three short Bragg gratings, including one standard core grating and two edge-core gratings inscribed at precise positions along a single-mode fiber. The combination of edge-core and core gratings enables bending-induced asymmetrical electric field distribution to be effectively converted into optical intensity variations. Two 3R-FPI configurations are fabricated with carefully designed cavity lengths to generate distinct, non-overlapping spatial frequency components in the spatial frequency domain, thereby allowing efficient multiplexing through spatial frequency-division multiplexing (sFDM). The sensor’s output is demodulated using selective local Fourier transform, which significantly reduces computational complexity by focusing only on the resonant spatial frequency components of interest. Experimental results show that the proposed 3R-FPI exhibits clear and repeatable spectral responses to inclination changes within a range of − 50° to + 50°, with linear sensitivities of 6 × 10<sup>−7</sup>a.u./° and 3 × 10<sup>−7</sup>a.u./° for Configurations I and II, respectively (R<sup>2</sup> > 0.98). The developed system further demonstrates biaxial inclination/tilt measurement capability when two 3R-FPI sensors are integrated orthogonally in a single array. The compact design, high sensitivity, and efficient frequency-domain multiplexing make the fs-laser-inscribed 3R-FPI an excellent candidate for distributed and vector inclination sensing in structural monitoring applications.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114909"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-distance drone classification in intracity environments via temporal single-photon detection 基于时间单光子检测的城市环境下远程无人机分类

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-07 DOI: 10.1016/j.optlastec.2026.114900

Junran Guo , Tonglin Mu , Keyuan Li , Jianing Li , Ziyang Luo , Xiaodong Fan , Ye Chen , Jinquan Huang , Minjie Liu , Ruoyang Qi , Naiting Gu , Hong Cai , Lip Ket Chin , Shihai Sun

{"title":"Long-distance drone classification in intracity environments via temporal single-photon detection","authors":"Junran Guo , Tonglin Mu , Keyuan Li , Jianing Li , Ziyang Luo , Xiaodong Fan , Ye Chen , Jinquan Huang , Minjie Liu , Ruoyang Qi , Naiting Gu , Hong Cai , Lip Ket Chin , Shihai Sun","doi":"10.1016/j.optlastec.2026.114900","DOIUrl":"10.1016/j.optlastec.2026.114900","url":null,"abstract":"<div><div>Single-photon light detection and ranging (SP-LiDAR) offers exceptional capabilities for long-range imaging or target identification, yet its high system complexity and substantial power/time consumption have hindered deployment in task-oriented applications. In this paper, we present the first experimental demonstration of long-distance drone classification beyond 5 km in a real-world intracity setting using temporal single-photon LiDAR (TSP-LiDAR). Unlike conventional approaches, TSP-LiDAR directly extracts target features from temporal histograms, eliminating the need for imaging optics and computationally intensive reconstruction algorithms. Both simulation and field results confirm that our TSP-LiDAR successfully achieves high classification accuracy under challenging conditions, including low signal-to-noise ratio (SNR) and sparse echo photon count. Specifically, in our 5 km experiments, we achieve pose and type classification accuracies of 96.11% and 98.06%, respectively, at SNRs ranging from 0.01 to 0.15 and echo photon count rates between 2∼30 kHz. Notably, the system further discriminates fine pitch variations down to approximately 1.15°. These findings underscore the potential of our TSP-LiDAR for robust, long-range classification of small aerial targets, paving the way for advanced urban surveillance and air defense applications.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114900"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gravity-induced distortion dynamics of molten pool and keyhole during non-horizontal dual laser beam bilateral synchronous welding for Ti-6Al-4V alloy T-joints Ti-6Al-4V合金t形接头非水平双激光束双边同步焊接过程中熔池和锁孔重力畸变动力学

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-04 DOI: 10.1016/j.optlastec.2026.114815

Yanqiu Zhao , Tingyan Yan , Rui Li , Jiangfeng Wang , Chao Ma , Xiaohong Zhan

{"title":"Gravity-induced distortion dynamics of molten pool and keyhole during non-horizontal dual laser beam bilateral synchronous welding for Ti-6Al-4V alloy T-joints","authors":"Yanqiu Zhao , Tingyan Yan , Rui Li , Jiangfeng Wang , Chao Ma , Xiaohong Zhan","doi":"10.1016/j.optlastec.2026.114815","DOIUrl":"10.1016/j.optlastec.2026.114815","url":null,"abstract":"<div><div>Dual laser beam bilateral synchronous welding (DLBSW) has been proven as an effective fabrication technique for Ti-6Al-4V alloy T-joints. Nevertheless, the pronounced impact of gravity deflection on fluid flow and keyhole stability in DLBSW of spatially complex curved structures must be thoroughly evaluated, given its consequential effects on porosity and fatigue life. In this paper, the thermal-fluid coupling models of Ti-6Al-4V alloy T-joints during horizontal DLBSW and Non-Horizontal DLBSW at the gravity deflection angle (θ) of 25° and 40° were respectively established. The spatiotemporal characteristics of fluid flow under diverse gravitational regimes and the dynamic evolution of the keyhole were comprehensively delineated. Additionally, the fundamental mechanism governing gravity-driven distortion of the molten pool and the resultant destabilization of the orifice under the dual-beam coupling effect was uncovered. It is revealed that gravitational deflection induces a reconfiguration of liquid metal flow from the upper molten pool, leading to diminished thermal energy delivery to the anterior wall. This, in turn, restricts the advancement of the solid/liquid interface and exacerbates thermal asymmetry. Moreover, gravitational deflection enhances bubble nucleation, impedes their removal, and compromises the liquid’s void-filling efficacy, culminating in porosity formation. These outcomes offer significant guidance for porosity suppression strategies and inform the refinement of DLBSW techniques for T-joint manufacturing.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114815"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoelectric hybrid deep neural network based adaptive optics scheme for vortex beam in oceanic turbulence 基于光电混合深度神经网络的海洋湍流涡旋光束自适应光学方案

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-13 DOI: 10.1016/j.optlastec.2026.114936

Haichao Zhan , Yang Qu , Le Wang , Shengmei Zhao

{"title":"Photoelectric hybrid deep neural network based adaptive optics scheme for vortex beam in oceanic turbulence","authors":"Haichao Zhan , Yang Qu , Le Wang , Shengmei Zhao","doi":"10.1016/j.optlastec.2026.114936","DOIUrl":"10.1016/j.optlastec.2026.114936","url":null,"abstract":"<div><div>Underwater wireless optical communication (UWOC) systems are essential for underwater applications due to their superior performance, with orbital angular momentum (OAM) boosting channel capacity via mode orthogonality. However, oceanic turbulence (OT) distorts OAM-carrying vortex beams, and existing adaptive optics (AO) methods and single-type neural network approaches are limited by cost, optimization issues, or inadequate precision. In this paper, we propose a photoelectric hybrid deep neural network (PHDNN) based AO scheme to correct the distortion caused by OT to vortex beam carrying OAM. The PHDNN model is composed of diffractive deep neural network and convolutional neural network, which are trained jointly to predict the coefficients of Zernike polynomial representing OT. The phase screen reconstructed based on the Zernike coefficients is conjugated and used to eliminate OT. The proposed scheme achieves fast convergence at 25 epochs with a final loss of 0.096, low latency of 4.113s under strong OT, and robust adaptability to varying turbulence intensities. Experimental results show that it reconstructs high-quality phase screens with a peak signal-to-noise ratio up to 35.548, and significantly enhances OAM mode purity to 0.936 under strong OT, in sharp contrast to the uncorrected value of 0.024. The proposed scheme provides the benefits for the realization of the fusion of all-optical neural network and electronic neural network, and contributes to the development of UWOC system.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114936"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep learning enabled single-shot 3D measurement for colorful object in fringe projection profilometry 深度学习实现了条纹投影轮廓术中彩色物体的单镜头3D测量

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.optlastec.2026.114895

Junyi Lin, Yupeng Li, Qi Dou, Changbiao Huang, Hua Liu, Ping Lu

{"title":"Deep learning enabled single-shot 3D measurement for colorful object in fringe projection profilometry","authors":"Junyi Lin, Yupeng Li, Qi Dou, Changbiao Huang, Hua Liu, Ping Lu","doi":"10.1016/j.optlastec.2026.114895","DOIUrl":"10.1016/j.optlastec.2026.114895","url":null,"abstract":"<div><div>The composite fringe projection profilometry based on deep learning has successfully achieved high efficiency and accuracy in single-shot 3D reconstruction. However, high-quality 3D measurement for colorful objects remains a challenging task in this field. Wrapped phase jumps and phase period ambiguity caused by color are the main reasons for the challenges. To solve these problems, this paper proposes an anti-color interference single-shot 3D reconstruction method (AIS3DRM) based on Haar-like composite fringe projection (HCFP) and dual-context scale-aware network (DCSA-Net), which utilizes HCFP to better reduce the phase jump and effectively avoid the phase period ambiguity in the colorful object measurement domain, and DCSA-Net to restore the non-ideal fringe patterns caused by color mutation. The deep-learning-enabled HCFP profilometry (DHCFPP) method is adopted to implement the three-frequency four-step phase-shifting method (TFPM) efficiently and accurately. DCSA-Net is an architecture based on U-Net, which integrates Spatial Frequency Fusion Attention Blocks (SFFABs) and an Adversarial Training Framework (ATF). SFFABs dynamically weight features through parallel branches to ensure robust performance under different object color conditions. ATF further optimizes the loss function by comparing the up-sampled output with real data. Our experimental results demonstrate that the proposed method outperforms existing methods in terms of the quality of the generated phase and the integrity of the point cloud for colorful object measurement.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114895"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ablation characteristics and material removal mechanism of Invar 36 alloy under femtosecond laser irradiation 飞秒激光辐照下Invar 36合金的烧蚀特性及材料去除机理

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.optlastec.2026.114878

Zhenda Wang , Xiaohong Lu , Yuhang Tian , Hao Wang , Steven Y. Liang

引用次数: 0

Simplified Kerr refractive index measurement in the visible range using phase object contrast imaging 使用相位物体对比成像在可见范围内简化克尔折射率测量

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.optlastec.2026.114888

Georges Boudebs , Julien-Bilal Zinoune , Christophe Cassagne , Mihaela Chis

{"title":"Simplified Kerr refractive index measurement in the visible range using phase object contrast imaging","authors":"Georges Boudebs , Julien-Bilal Zinoune , Christophe Cassagne , Mihaela Chis","doi":"10.1016/j.optlastec.2026.114888","DOIUrl":"10.1016/j.optlastec.2026.114888","url":null,"abstract":"<div><div>A streamlined method is presented for determining the nonlinear refractive index <span><math><msub><mi>n</mi><mn>2</mn></msub></math></span> using phase objects embedded in an optical imaging configuration. The approach is particularly well suited to broadband sources such as tunable optical parametric amplifiers (OPAs), which typically exhibit non-Gaussian spatial profiles and femtosecond pulses with wavelength-dependent duration. Conventional techniques such as Z-scan require precise knowledge of intensity, pulse duration, beam waist and sample position, parameters that are difficult to control in OPA-based systems. The proposed method overcomes these constraints through a two-shot comparative measurement between a reference material (e.g., fused silica) and the sample, eliminating the need for translation stages, autocorrelation diagnostics and detailed beam characterization. By referencing the nonlinear phase shift to a well-known material, the technique removes scanning and intensity-calibration requirements, ensuring broad applicability across wavelengths and sample types. Theoretical modeling and experimental validation demonstrate high sensitivity together with a substantial reduction in experimental complexity. Results show excellent agreement with established methods, confirming the reliability of the approach. This work provides a rapid and efficient route for characterizing nonlinear optical properties in situations where conventional techniques are impractical. <span><span>Supplementary Material</span></span>s include data-processing scripts and numerical resources to facilitate implementation and reproducibility.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114888"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in laser ablation-assisted water electrolysis for hydrogen production 激光烧蚀辅助水电解制氢研究进展

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.optlastec.2026.114884

Jian Pu , Fang Hu , Yuan Li , Chuang Yue

{"title":"Advances in laser ablation-assisted water electrolysis for hydrogen production","authors":"Jian Pu , Fang Hu , Yuan Li , Chuang Yue","doi":"10.1016/j.optlastec.2026.114884","DOIUrl":"10.1016/j.optlastec.2026.114884","url":null,"abstract":"<div><div>In recent years, the increasing global demand for clean energy has spurred extensive research into hydrogen production via water electrolysis—a highly promising renewable technology. Electrocatalysts play a critical role in determining the efficiency and purity of this process, serving as a core component for improving overall performance. Laser ablation technology, boasting remarkable advantages like high efficiency, precision, and non-contact operation, has blazed a new route for the preparation of high-performance electrocatalysts. This technique enables the construction of micro/nano framework structures that offer abundant active sites, while allowing precise control over the composition, structure, and morphology of catalysts at the atomic level. As a result, it facilitates comprehensive enhancement of catalytic activity, stability, and electrical conductivity. This article provides a systematic review of recent advances in laser ablation for electrocatalyst preparation and offers a forward-looking perspective on future developments, aiming to serve as a valuable reference for further breakthroughs in the field.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114884"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of Hot–Cold thermal balance control in Water-Jet-Guided laser machining of NdFeB permanent magnets 水导激光加工钕铁硼永磁体的冷热平衡控制机理

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI: 10.1016/j.optlastec.2026.114879

Ping Huang , Guanghui Zhang , Zhichuang Chen , Xinping He , Qingan Lu , Yuxing Huang , Hui Jiao , Tanggao Feng , Yuhong Long

{"title":"Mechanisms of Hot–Cold thermal balance control in Water-Jet-Guided laser machining of NdFeB permanent magnets","authors":"Ping Huang , Guanghui Zhang , Zhichuang Chen , Xinping He , Qingan Lu , Yuxing Huang , Hui Jiao , Tanggao Feng , Yuhong Long","doi":"10.1016/j.optlastec.2026.114879","DOIUrl":"10.1016/j.optlastec.2026.114879","url":null,"abstract":"<div><div>Owing to the high thermal sensitivity of NdFeB, simultaneously achieving a high material removal rate (MRR) and a low heat-affected zone (HAZ) remains challenging. This study employs water-jet-guided laser (WJGL) machining and develops an integrated hot–cold thermal balance control framework that couples multiphysics simulation, a data-driven surrogate model, and multi-objective optimization. The simulations reveal a V-shaped surface water-flow profile: intensified convection at the periphery suppresses thermal diffusion, while the core region—experiencing relatively low flow velocity—maintains temperatures near the vaporization threshold to sustain efficient ablation, thereby enabling spatially coordinated hot–cold regulation. A small-sample surrogate based on Gaussian process regression is combined with NSGA-II to compute the Pareto front, yielding a representative optimum with HAZ of 39.79 μm and MRR of 3.44 mm<sup>2</sup> s⁻<sup>1</sup>. Temperature-field analysis confirms that this parameter set preserves near-threshold vaporization in the core to secure efficiency, while constraining lateral thermal spread. The proposed approach provides a rigorous pathway for the coordinated optimization of low thermal damage and high efficiency in WJGL machining of thermally sensitive materials.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114879"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extended numerical monochromatization for broadband phase retrieval 宽带相位检索的扩展数值单色化

IF 5 2区物理与天体物理

Optics and Laser Technology Pub Date : 2026-06-01 Epub Date: 2026-02-11 DOI: 10.1016/j.optlastec.2026.114894

Zhengkang Xu , Jin Niu , Huixiang Lin , Yongjun Ma , Hao Xu , Yutong Wang , Yunsong Liang , Changjun Ke , Fucai Zhang , Xiaoshi Zhang , Jie Li , Zhongwei Fan

{"title":"Extended numerical monochromatization for broadband phase retrieval","authors":"Zhengkang Xu , Jin Niu , Huixiang Lin , Yongjun Ma , Hao Xu , Yutong Wang , Yunsong Liang , Changjun Ke , Fucai Zhang , Xiaoshi Zhang , Jie Li , Zhongwei Fan","doi":"10.1016/j.optlastec.2026.114894","DOIUrl":"10.1016/j.optlastec.2026.114894","url":null,"abstract":"<div><div>With the advancement of attosecond science, probing ultrafast processes at unprecedented scales has become possible, opening new frontiers in ultrafast imaging. The spectrum of ultrafast attosecond pulses typically exhibits a broad bandwidth rather than monochromatic radiation, presenting significant challenges for image reconstruction. In this study, we introduce a novel algorithm, Extended Numerical Monochromatization (ENM), which imposes a prior constraint on the solution of numerical monochromatization. This approach enables precise numerical monochromatization of broadband diffraction patterns, achieving a substantial improvement in resolution by approximately 2 times, as demonstrated in experimental results with 15% bandwidth light source. Notably, ENM maintains robust reconstruction performance even with a substantial reduction in the spectral sampling rate. The method is applicable to various broadband sources, including both continuous and discrete spectra, under the assumption of investigating non-dispersive specimens. Additionally, we introduce an improved method for constructing the key matrix in the numerical monochromatization process, resulting in a significant speedup. For example, the computation time was reduced by up to 18 times in selected cases, and the speedup increases even further as the data size grows. With its increased speed, high accuracy, and robustness, ENM provides a new perspective and powerful tool for ultrafast imaging at the attosecond scale.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"198 ","pages":"Article 114894"},"PeriodicalIF":5.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0