Optics express最新文献_第5页

Single-shot 8-frame direct imaging with an effective frame rate up to 40 Tfps and a two-dimensional space-bandwidth-product beyond 65,500. 单镜头8帧直接成像，有效帧率高达40 Tfps，二维空间带宽积超过65500。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.569272

Congying Wang, Rui Zhang, Xuanke Zeng, Yi Cai, Xiaowei Lu, Ran Ning, Hongmei Zhong, Kaipeng Wu, Shixiang Xu, Jingzhen Li, Dianyuan Fan

{"title":"Single-shot 8-frame direct imaging with an effective frame rate up to 40 Tfps and a two-dimensional space-bandwidth-product beyond 65,500.","authors":"Congying Wang, Rui Zhang, Xuanke Zeng, Yi Cai, Xiaowei Lu, Ran Ning, Hongmei Zhong, Kaipeng Wu, Shixiang Xu, Jingzhen Li, Dianyuan Fan","doi":"10.1364/OE.569272","DOIUrl":"https://doi.org/10.1364/OE.569272","url":null,"abstract":"Compared with computational imaging, direct imaging is still a concern since it provides more intuitive and reliable spatiotemporal information of the target. The paper presents a single-shot ultrafast framing direct imaging based on polarization-spatial-encoding via non-collinear optical parametric amplification (OPA) with remarkable imaging seed and spatiotemporal resolutions. Here, a 2 × 4 architecture is designed for eight optical parametric amplifiers to get eight frames by polarization splitting. This architecture effectively suppresses signal depolarization and diffraction effects, particularly mitigating nonlinear effects during pump propagation, thus enhancing imaging quality compared with a 1 × 8 design. Targeted with laser-induced air plasma, our experiments verify that the single-shot imaging system has carried out 8-frame direct imaging by 25 fs temporal resolution, 40 trillion frames per second (Tfps) effective frame rate, and beyond 25.6 lp/mm spatial resolution over a 10 × 10 mm2 field-of-view. The experimental results also show the capture of richer spatiotemporal details of air plasma in the early stage (0∼3.6 ps) after excitation. The temporal window can be flexibly expanded by changing the frame interval. This work provides a powerful tool for accurately understanding dynamic processes on the femtosecond to picosecond scale for non-repeatable or random dynamic scenarios.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38088-38098"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125709","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

Low-frequency interlayer phonon dynamics and photoinduced terahertz absorption in black phosphorus. 黑磷中低频层间声子动力学和光诱导太赫兹吸收。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.574206

Haiyun Huang, Cheng Chen, Yuxin Zhai, Xiu Zhang, Junzhi Zhu, Junyong Wang, Kai Zhang, Qihua Xiong, Haiyun Liu

引用次数: 0

High precision, full-vector optical mode solving in waveguides via fourth-order derivative physics-informed neural networks. 高精度，全矢量光模式求解波导通过四阶导数物理通知神经网络。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571156

Weijie Xu, Qing Zhong, Ming Wang, Zeyong Wei, Zhanshan Wang, Xinbin Cheng

{"title":"High precision, full-vector optical mode solving in waveguides via fourth-order derivative physics-informed neural networks.","authors":"Weijie Xu, Qing Zhong, Ming Wang, Zeyong Wei, Zhanshan Wang, Xinbin Cheng","doi":"10.1364/OE.571156","DOIUrl":"https://doi.org/10.1364/OE.571156","url":null,"abstract":"Optical mode solving plays a critical role in photonic device design, yet conventional numerical methods face inherent challenges, including limited geometric adaptability and computational demands of large-scale matrix eigenvalue problems. Physics-informed neural networks (PINNs) tightly couple neural networks with physical principles, showcasing significant capabilities in photonics for addressing both forward computation and inverse design challenges. This work introduces fourth-order derivative PINNs (4DPINNs) for full-vector waveguide eigenmode solutions. The 4DPINNs simultaneously resolve tangential electric and magnetic field components, enabling direct mode analysis and optical efficiency computations. The network systematically integrates boundary conditions, initialization protocols, and a fourth-order derivative loss function derived from Maxwell's equations. We first validate 4DPINNs by determining electric field distributions for predefined propagation constants, comparing fixed-point initialization strategies with random-point approaches. The solutions achieve maximum absolute errors below -12 dB and minimum absolute errors below -50 dB relative to analytical benchmarks. Through adaptive learning rate optimization, we further demonstrate simultaneous prediction of mode propagation constants and field distributions. The 4DPINNs constrain propagation constant errors to under 10-4, keeping maximum field distribution absolute errors below -12 dB compared to analytical solutions. Our work demonstrates a highly accurate and broadly applicable waveguide eigensolver, offering substantial value for semiconductor devices and photonic integrated circuits.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38317-38328"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125731","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

Trillion-switching-cycle endurance and high-speed operation of a nonvolatile magneto-optic switch. 非易失性磁光开关的万亿开关周期耐久性和高速运行。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571525

Shun Yajima, Nobuhiko Nishiyama, Yuya Shoji

引用次数: 0

Multi-object parallel optical encryption for single-pixel imaging security. 用于单像素成像安全的多目标并行光学加密。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572099

Guohang Wu, Chongyang Zhang, Hongran Zeng, Seok-Tae Kim, Xiaowei Li

{"title":"Multi-object parallel optical encryption for single-pixel imaging security.","authors":"Guohang Wu, Chongyang Zhang, Hongran Zeng, Seok-Tae Kim, Xiaowei Li","doi":"10.1364/OE.572099","DOIUrl":"https://doi.org/10.1364/OE.572099","url":null,"abstract":"Multi-object optical encryption has emerged as a promising field for enhancing encryption performance and reducing communication overhead, which can ensure the security of single-pixel imaging. However, it faces some critical challenges like low efficiency, reliance on complex system design, high hardware costs, and the difficulty of parallel encryption with independent decryption, hindering practical deployment. In this work, an illumination pattern construction algorithm is proposed to generate projected basis patterns for parallel optical encryption, while a decoupling algorithm is developed to demodulate coupled measurements to recover Hadamard spectrum for each object. Independent decryption is then performed using a random-order Hadamard matrix assigned to each object. The proposed method achieves multi-object parallel encryption and independent decryption using a lightweight optical system, with improved efficiency, lower hardware costs, and smaller ciphertext size compared to conventional methods. In addition, it also exhibits robustness against both cropping and noise attacks. These results indicate potential for practical applications and may contribute to future developments in multi-object optical encryption for single-pixel imaging security.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37969-37981"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125466","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

Optical sample-and-hold for clock skew immunity in high-speed channel-interleaved photonic analog-to-digital converters. 高速通道交错光子模数转换器中时钟偏斜抗扰度的光学采样保持。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571841

Ruiheng Qin, Le Zhang, Xinpei Chen, Jiaxing Wu, Na Qian, Weiwen Zou

{"title":"Optical sample-and-hold for clock skew immunity in high-speed channel-interleaved photonic analog-to-digital converters.","authors":"Ruiheng Qin, Le Zhang, Xinpei Chen, Jiaxing Wu, Na Qian, Weiwen Zou","doi":"10.1364/OE.571841","DOIUrl":"https://doi.org/10.1364/OE.571841","url":null,"abstract":"Precise clock synchronization dramatically increases the difficulty of designing large-scale and high-resolution channel-interleaved photonic analog-to-digital converters (PADCs). This paper presents what we believe to be a novel all-optical sample-and-hold method based on vector superposition. Closed-form equations are analyzed and derived to characterize the impact of various system parameters, including input frequency, bandwidth, and clock skew. To enable the optical sampling front end function as an optical sample-and-hold (S&H) circuit, sub-optical pulses with additional wavelengths are incorporated for the simultaneous acquisition of input signals. By precisely delaying and coherently coupling identical sampled information carried by these sub-optical pulses, discrete sampling points are effectively converted into continuous intervals, thereby significantly mitigating temporal errors caused by inter-channel clock skew and timing mismatches. The proposed method features the advantages of low complexity, low power consumption, and the ability to function over a wide frequency range. In the experiment, the proposed signal-holding mechanism inherently suppresses multi-channel temporal mismatches without sophisticated calibrations. The measurements of the configured channel-interleaved PADC demonstrate clock skew immunity within a ± 0.1 sampling period range while maintaining a spurious-free dynamic range (SFDR) above 60 dB.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38814-38827"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125467","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

Complex-to-binary amplitude hologram conversion using complex loss functions. 利用复损失函数的复到二值振幅全息图转换。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.569013

Juan Andrés González-Moncada, Alejandro Velez-Zea, John Fredy Barrera-Ramírez

{"title":"Complex-to-binary amplitude hologram conversion using complex loss functions.","authors":"Juan Andrés González-Moncada, Alejandro Velez-Zea, John Fredy Barrera-Ramírez","doi":"10.1364/OE.569013","DOIUrl":"https://doi.org/10.1364/OE.569013","url":null,"abstract":"In this paper, we propose a binary-stochastic gradient descent optimization scheme that uses complex loss functions to generate binary amplitude holograms (BAHs) capable of reproducing a variety of target complex fields with improved accuracy. We introduce two complex loss functions, based on the mean squared error and correlation coefficient metrics, for use during BAH optimization. To the best of our knowledge, this is the first time that such complex loss functions have been applied to convert arbitrary complex, phase, or amplitude holograms into binary amplitude holograms. The proposed approach allows reproducing 3D distributions by evaluating the field at a single plane, enhancing versatility and increasing computation speed compared to conventional optimization schemes that require evaluating the intensity of the field at multiple planes. We perform numerical and experimental tests to reproduce complex target fields, including color 3D, multiplane, extended-depth-of-focus, and experimentally recorded scenes. The results demonstrate that the proposed approach yields improved reconstruction quality over direct binarization of amplitude holograms. Projection of different types of scenes using an experimental digital micromirror device-based holographic augmented reality setup is demonstrated, further confirming the effectiveness of our proposal.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38963-38983"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125494","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

Quantum illumination using polarization-entangled photon pairs for enhanced object detection: comment. 利用偏振纠缠光子对增强物体检测的量子照明：评论。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.548099

Artur Czerwinski, Jakub J Borkowski

引用次数: 0

Profile control of fiber-based micro-mirrors using adaptive laser shooting with in situ imaging. 基于原位成像的自适应激光射击光纤微镜的轮廓控制。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.564341

Shaobo Gao, Vishnu Kavungal, Shuma Oya, Daichi Okuno, Ezra Kassa, William J Hughes, Peter Horak, Hiroki Takahashi

{"title":"Profile control of fiber-based micro-mirrors using adaptive laser shooting with in situ imaging.","authors":"Shaobo Gao, Vishnu Kavungal, Shuma Oya, Daichi Okuno, Ezra Kassa, William J Hughes, Peter Horak, Hiroki Takahashi","doi":"10.1364/OE.564341","DOIUrl":"https://doi.org/10.1364/OE.564341","url":null,"abstract":"fiber Fabry-Perot cavities (FFPCs) are used in various studies in cavity quantum electrodynamics (CQED) and quantum technologies due to the cavity's small mode volume and compact integration with optical fibers. We develop a novel CO2 laser machining method that produces well-controlled surface profiles on the end facets of cleaved optical fibers. Using multiple shots in distinct spatial distribution patterns, our method employs a shooting algorithm that adaptively changes laser ablation parameters during the shooting to suppress deviations from the desired profile. This is made possible by in situ imaging of the machined profile, its inspection, and the usage of the information in the subsequent steps. Underlying this algorithm is a newly found laser ablation parameter, the pause between shots, which controls the accumulation of heat in between successive laser shots, and as a result, determines the area of impact made by an individual ablation sequence. We fabricate fiber-based micro-mirrors with radii of curvature ranging from 250 µm to 700 µm with an effective mirror diameter of 60 µm in either Gaussian or spherical profiles. Due to the self-correcting nature of our adaptive algorithm, we achieve a near 100% success rate in the production of desired profiles with low ellipticity. After furnishing the laser-machined fiber end facets with high reflectivity coating, FFPCs are formed to demonstrate a high finesse up to 150,000 at an optical wavelength of 854 nm.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"39009-39022"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125568","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

Rayleigh-Wood anomaly-driven robust optical pulling forces in 1D periodic lattices. 一维周期晶格中瑞利-伍德异常驱动的鲁棒光学拉力。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.571947

Jian Shen, Yiyun Chen, Jensen Li, Jack Ng

引用次数: 0