Optics Communications最新文献_第8页

Semi-analytical Monte Carlo simulation of underwater target echoes from a small UAV-based oceanic lidar 小型无人机海洋激光雷达水下目标回波的半分析蒙特卡罗模拟

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-28 DOI: 10.1016/j.optcom.2024.131157

Yifan Huang , Yan He , Xiaolei Zhu , Guangxiu Xu , Chaoran Zhang

{"title":"Semi-analytical Monte Carlo simulation of underwater target echoes from a small UAV-based oceanic lidar","authors":"Yifan Huang , Yan He , Xiaolei Zhu , Guangxiu Xu , Chaoran Zhang","doi":"10.1016/j.optcom.2024.131157","DOIUrl":"10.1016/j.optcom.2024.131157","url":null,"abstract":"<div><div>Small unmanned airborne oceanic lidars are becoming increasingly popular for ocean surveys. They typically weigh less than 10 kg and can be mounted on commonly used commercial drones, making them easier to use than traditional large oceanic lidars, which typically weigh up to 80 kg and can only be carried on manned aircraft. Unmanned airborne oceanic lidars typically fly at lower altitudes and use higher laser emission frequencies, making them suitable for detecting underwater targets. However, most of the existing LiDAR underwater echo simulation models are designed for flat terrain and assume that the target fills the LiDAR receiving field of view, and there are few studies on the echoes of suspended targets smaller than the field of view range. Therefore, we combined ray tracing and semi-analytical Monte Carlo to model the laser echo energy of the underwater target. The study investigated the energy change of the target echo in the direction of deviation from the laser outgoing direction, and the impact of absorption and scattering coefficients on it. The difference in echo energy between different fields of view for extended and non-extended targets and the effect of water quality on it were explored. The echo waveforms of the target under different tilt angles were simulated, and it was found that the target echo pattern will be tilted with the change of tilt angle and offset position.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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Study of step-like pulses from a mode-locked erbium-doped fiber laser in L-band L 波段掺铒光纤激光器发出的阶跃脉冲研究

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-27 DOI: 10.1016/j.optcom.2024.131146

Boxin Li , Lei Huang , Dongfang Jia

引用次数: 0

Efficient single-mode operation in a 10 dB/m absorption very-large-mode-area ytterbium-doped optical fiber via curvature-induced mode filtering 通过曲率诱导模式滤波实现 10 dB/m 吸收率超大模式面积掺镱光纤中的高效单模运行

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-27 DOI: 10.1016/j.optcom.2024.131150

Tristan Guezennec , Laurent Provino , David Landais , Achille Monteville , Olivier Le Goffic , Robin Pouyet , Bertrand Dudoux , Thierry Chartier , Adil Haboucha

引用次数: 0

Using merging BICs in photonic crystal slabs to enhance incident angle robustness of Ultrahigh-Q terahertz resonance 利用光子晶体板中的合并 BIC 增强超高 Q 太赫兹共振的入射角稳健性

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-27 DOI: 10.1016/j.optcom.2024.131163

Xin Zhang, Shuang Yang, Yachen Gao

{"title":"Using merging BICs in photonic crystal slabs to enhance incident angle robustness of Ultrahigh-Q terahertz resonance","authors":"Xin Zhang, Shuang Yang, Yachen Gao","doi":"10.1016/j.optcom.2024.131163","DOIUrl":"10.1016/j.optcom.2024.131163","url":null,"abstract":"<div><div>Ultrahigh-quality (Q) terahertz (THz) resonances hold tremendous potential for applications in nonlinear optics, sensing, and other fields. However, their performance is often affected by the dispersion effects caused by wide-angle incidence and the scattering losses caused by manufacturing defects. Here, we propose a novel THz resonator based on photonic crystal (PhC) slab with C<sub>2v</sub> symmetry and flat TE mode bands. Theoretical results indicate, symmetry-protected bound states in continuum (S–P BIC) can occur at the Γ point and four accidental BICs in the ΓX and ΓY directions. Leveraging the topological properties of BICs, by judiciously tuning the structural parameter of resonator, the S–P BIC and accidental BICs are merged at the Γ point, forming flat bands with Q values as high as 10<sup>11</sup> in the ΓX and ΓY directions. Consequently, based on the flat TE mode bands and high-Q flat bands, when X or Y-polarized THz waves are incident on this PhC, it exhibits a Q value as high as 10<sup>9</sup>. Furthermore, as the incidence angle of the THz waves increases from 0° to 20°, the relative shift and bandwidth variation of resonant transmission peak are close to 0%, which demonstrates that the resonator has extremely strong robustness.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optimization of sparse camera array arrangement using grid-based method 利用基于网格的方法优化稀疏摄像机阵列排列

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-26 DOI: 10.1016/j.optcom.2024.131137

Yu Zhang, Tianren Li, Zhenzhong Wei, Yufu Qu

{"title":"Optimization of sparse camera array arrangement using grid-based method","authors":"Yu Zhang, Tianren Li, Zhenzhong Wei, Yufu Qu","doi":"10.1016/j.optcom.2024.131137","DOIUrl":"10.1016/j.optcom.2024.131137","url":null,"abstract":"<div><div>—This study explores the application of multi-camera array technology in super-resolution (SR) imaging system. We propose an innovative method based on grid representation to optimize camera arrangements using sparse Gaussian processes and variational inference. This approach significantly enhances the image reconstruction quality of sparse camera arrays. Unlike conventional techniques that provide only qualitative conclusions, our grid-based method precisely optimizes camera positions and effectively simulates the impact of assembly errors. The optimized camera arrangement substantially improves the SR reconstruction quality of sparse array imaging systems, reducing contour jaggedness and high-frequency aliasing. Extensive simulations and experimental validations confirm the robustness and practical applicability of our method. The results demonstrate that the optimized camera arrangements can achieve high-resolution imaging with enhanced robustness against assembly errors, indicating their potential for various applications such as biological microscopy, remote sensing, and smartphone photography. This work presents a new and effective strategy for designing sparse camera array imaging systems, offering significant improvements in both image quality and system reliability.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Two-photon polymerization of hydrogel cellular scaffolds 双光子聚合水凝胶细胞支架

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-26 DOI: 10.1016/j.optcom.2024.131161

Zewei He , Sailing He

{"title":"Two-photon polymerization of hydrogel cellular scaffolds","authors":"Zewei He , Sailing He","doi":"10.1016/j.optcom.2024.131161","DOIUrl":"10.1016/j.optcom.2024.131161","url":null,"abstract":"<div><div>Three-dimensional (3D) micro-nano fabrication through two-photon polymerization (TPP) offers a convenient way to fabricate complex structures with fine precision using hydrogel materials commonly employed in biological cell culture. Presently, tissue engineering scaffold fabrication encounters challenges related to processing precision and the creation of complex structures. We developed a 780 nm fs laser system integrated with a 2D galvanometer system and Z-axis to create a 3D micro-nano printing system. Arbitrarily complex structures that simulate the vascular environment <em>in vivo</em> can be fabricated, taking advantage of the fact that the femtosecond laser is focused only inside the photoresist. Through testing the linewidth resolution of GelMA hydrogel via two-photon polymerization processing, we identified optimal laser power, scanning rate, and photoinitiator concentration for precise processing. We successfully produced a simple tissue scaffold, a regular structure composed of several cubes. A complex structure scaffold simulating the structure of mouse blood vessels was printed, and we successfully seeded the mouse neuron cells on it. This confirms the feasibility of replicating the <em>in vivo</em> vascular environment <em>in vitro</em> and utilizing two-photon micro-nano-processed scaffold structures for cell culture experiments. The ability to fabricate complex microstructures with high precision and resolution using GelMA hydrogel opens up new possibilities in tissue engineering, regenerative medicine, and drug delivery systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-band all-optical logic gate based on coherent control principles 基于相干控制原理的双波段全光逻辑门

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-26 DOI: 10.1016/j.optcom.2024.131113

Tianrang Wang , Wei Wang , Wenhao Han , Rongquan Chen , Ming Chen , Jinbiao Liu

引用次数: 0

Mid-infrared laser pulse excitation for terahertz generation from organic liquids molecules 中红外激光脉冲激发有机液体分子产生太赫兹信号

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-26 DOI: 10.1016/j.optcom.2024.131156

Yezi Pu , Xiao-Yu Peng , Zhang Yue

引用次数: 0

Experimental demonstration of free-space optical communication under 2 km urban atmosphere using adaptive fiber coupling 利用自适应光纤耦合实现 2 千米城市大气层下自由空间光通信的实验演示

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-25 DOI: 10.1016/j.optcom.2024.131151

Ziting Pan , Ziqiang Li , Yuting Li , Guan Huang , Fan Zou , Likang Pan , Mingyan Lin , Feng Li , Chao Geng , Xinyang Li

{"title":"Experimental demonstration of free-space optical communication under 2 km urban atmosphere using adaptive fiber coupling","authors":"Ziting Pan , Ziqiang Li , Yuting Li , Guan Huang , Fan Zou , Likang Pan , Mingyan Lin , Feng Li , Chao Geng , Xinyang Li","doi":"10.1016/j.optcom.2024.131151","DOIUrl":"10.1016/j.optcom.2024.131151","url":null,"abstract":"<div><div>Satellite-to-ground communication, quantum communication, and intra-city communication all benefit from free-space optical communication. Coupling as much light power as possible into optical fibers is crucial for free-space optical communication, where atmospheric turbulence and platform sway will affect the coupling effect. This paper introduces a scheme for free-space optical communication utilizing a single adaptive fiber coupler, which can mitigate turbulence and other disturbances at minimal cost. Experimental results in a 2 km urban atmosphere show that our method can increase coupling power by up to 20% for the majority of the time. Moreover, the bit error rate of communication reduces from 4.53 × 10<sup>−4</sup> to 3.80 × 10<sup>−8</sup> after implementing the closed-loop correction and we also demonstrate video transmission. Additionally, this scheme can be combined with coherent beam combining and spatial diversity techniques, offering a comprehensive solution to both tip/tilt aberration and scintillation issues.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Vis-SWIR hyperspectral microscopy imaging of plasmonic color printed arrays 等离子体彩色印刷阵列的可见光-西红外高光谱显微成像

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131135

Mads S. Peters , Torgom Yezekyan , René L. Eriksen , Jonas Beermann , Bjarke Jørgensen , Sergey I. Bozhevolnyi

{"title":"Vis-SWIR hyperspectral microscopy imaging of plasmonic color printed arrays","authors":"Mads S. Peters , Torgom Yezekyan , René L. Eriksen , Jonas Beermann , Bjarke Jørgensen , Sergey I. Bozhevolnyi","doi":"10.1016/j.optcom.2024.131135","DOIUrl":"10.1016/j.optcom.2024.131135","url":null,"abstract":"<div><div>This paper explores the applications of visible shortwave infrared (Vis-SWIR) hyperspectral microscopy in the context of plasmonic color printing arrays. The study focuses on metal–insulator–metal (MIM) configurations supporting gap-surface plasmons (GSPs) and investigates the spatial distribution of plasmonic resonances and the spectral response of nanostructures within the array. The fabricated plasmonic color printing samples consist of square arrays of circular gold nanodiscs (NDs) with varying diameters on top of a continuous layer of SiO<sub>2</sub> and gold, enabling tunable color printing. This work demonstrates the acquisition of detailed spatial and spectral information (in the spectral range from 447-1695 nm) that shows the redshifting of the absorption peak with the increasing size of plasmonic NDs and identifies the presence of fabrication errors and proximity effects in the arrays. The custom hyperspectral microscopy setup consists of a Newtec Vis-SWIR Oculus hyperspectral pushbroom camera (equipped with an IMX990 SonySWIR sensor) mounted on an Olympus microscope with a Thorlabs translation stage.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0