Optics Communications最新文献_第4页

Tunable Nonlinear Optical Response in Core/Shell Quantum Dots via Dielectric-Mediated Quantum Confinement 介电介导量子约束下核/壳量子点的可调谐非线性光学响应

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-27 DOI: 10.1016/j.optcom.2025.132382

N. Zeiri , A. Cherni , H. Dehdashti Jahromi , P. Baser , M. Said , MohammedN. Murshed , C.A. Duque

{"title":"Tunable Nonlinear Optical Response in Core/Shell Quantum Dots via Dielectric-Mediated Quantum Confinement","authors":"N. Zeiri , A. Cherni , H. Dehdashti Jahromi , P. Baser , M. Said , MohammedN. Murshed , C.A. Duque","doi":"10.1016/j.optcom.2025.132382","DOIUrl":"10.1016/j.optcom.2025.132382","url":null,"abstract":"<div><div>The precise control of nonlinear optical properties in nanostructures is vital for advancing photonic and optoelectronic device technologies. While quantum confinement and external fields are well-established tuning mechanisms, the influence of the surrounding dielectric matrix remains underexplored. Here, we present a theoretical investigation of CdS/ZnS core/shell quantum dots containing a central hydrogenic donor impurity, embedded in various dielectric environments and subjected to external electric fields. Our unified framework reveals that the dielectric mismatch between the nanostructure and its matrix can enhance or suppress the nonlinear optical rectification coefficient by over 100 %, fundamentally altering electron confinement and optical response. These results establish the dielectric environment as an active design parameter, offering a new axis of control for engineering nonlinear optical properties in quantum dots. This insight opens pathways for the tailored design of materials for terahertz, ultrafast photonic, and optoelectronic applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132382"},"PeriodicalIF":2.5,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932387","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

Research on off-axis reflective freeform surface beam shaping using annular extension method 用环形延伸法研究离轴反射自由曲面光束整形

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-27 DOI: 10.1016/j.optcom.2025.132377

Chengxiang Guo, Tong Yang, Zewu Liu, Lei Yang, Hongbo Xie

{"title":"Research on off-axis reflective freeform surface beam shaping using annular extension method","authors":"Chengxiang Guo, Tong Yang, Zewu Liu, Lei Yang, Hongbo Xie","doi":"10.1016/j.optcom.2025.132377","DOIUrl":"10.1016/j.optcom.2025.132377","url":null,"abstract":"<div><div>Laser beam shaping is widely applied in laser processing, illumination and other fields. Aiming at problems existing in previous methods, such as the difficulty in solving surface shapes, poor machinability and the difficulty in tolerance analysis, we present an entire design method for off-axis reflective freeform surface beam shaping systems. The freeform surfaces in the form of annular expansion are construct and optimized. Then, a surface tilt removal algorithm is proposed to reduce the variation amplitude of the mirror's sag, improving the machinability of the mirrors. Moreover, we established a real-time communication model between optical design software and numerical processing software, enabling the automatic statistical analysis of tolerance analysis results. The design example show that the method proposed in this paper can effectively shape Gaussian beams into circular flat-top beams. When the beam propagates from 100 mm to 500 mm, the uniformity variation range is 94.2 %–90.1 %. The surface tilt removal algorithm reduces the variation amplitude of the mirror's sag by more than 87 %. The tolerance results of irradiance uniformity at different propagation distances satisfy the demands of optical manufacture and alignment. This design method can provide valuable insight for the design, tolerance analysis and processing of freeform surface beam shaping systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132377"},"PeriodicalIF":2.5,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913498","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

Intelligent algorithm enhanced thin-film lithium niobate dispersion engineering for nonlinear optical devices design 非线性光学器件设计中基于智能算法的铌酸锂薄膜色散工程

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-26 DOI: 10.1016/j.optcom.2025.132378

Lipeng Chen, Fancheng Lin, Fei Ma

{"title":"Intelligent algorithm enhanced thin-film lithium niobate dispersion engineering for nonlinear optical devices design","authors":"Lipeng Chen, Fancheng Lin, Fei Ma","doi":"10.1016/j.optcom.2025.132378","DOIUrl":"10.1016/j.optcom.2025.132378","url":null,"abstract":"<div><div>Thin-film lithium niobate (TFLN) is widely utilized in the field of nonlinear optics owing to its exceptional nonlinear optical properties, a wide optical transparency window, especially it offers greater flexibility in device design compared to the bulk counterpart. In TFLN waveguide design, dispersion engineering plays a critical role by tailoring the effective refractive indices of waveguide modes to enable efficient nonlinear optical processes. However, current dispersion engineering methods largely rely on manual search or brute-force search strategies. The former is prone to getting trapped in local optima when tackling complex tasks, while the latter incurs prohibitive computational costs, hindering efficient iteration and optimization. To address these challenges, this work introduces a viable paradigm for dispersion engineering in TFLN. By formulating the physical principles into an objective function, we harness intelligent algorithms to systematically search through the parameter space, thereby enabling efficient dispersion engineering. Using this method, we demonstrate the design process of two waveguide structures that have significant practical applications. One TFLN waveguide facilitates cascaded third-harmonic generation (THG) with a single poling period, achieving a normalized conversion efficiency of 1,398,100 % W<sup>−2</sup>cm<sup>−4</sup>, which is the highest theoretical efficiency reported to date. Another TFLN waveguide enables efficient ultra-broadband second-harmonic generation (SHG), with a bandwidth spanning from the communication S-band to the U-band and a peak efficiency of 8701 % W<sup>−1</sup>cm<sup>−2</sup>. We believe this innovative paradigm provides an efficient and creative solution for the design of nonlinear optical devices on TFLN.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132378"},"PeriodicalIF":2.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913499","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

Wavefront Sensing in Undersampled Optical Systems Enabled by Frequency-Guided Deep Learning 基于频率引导深度学习的欠采样光学系统中的波前传感

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-26 DOI: 10.1016/j.optcom.2025.132379

Mingxiao Shao , Haijiang Sun , Qiang Cheng , Yu Xia , Donglin Xue

{"title":"Wavefront Sensing in Undersampled Optical Systems Enabled by Frequency-Guided Deep Learning","authors":"Mingxiao Shao , Haijiang Sun , Qiang Cheng , Yu Xia , Donglin Xue","doi":"10.1016/j.optcom.2025.132379","DOIUrl":"10.1016/j.optcom.2025.132379","url":null,"abstract":"<div><div>Image-based wavefront sensing methods offer the tremendous advantage of requiring no additional hardware, rendering them particularly suitable for resource-constrained spaceborne applications. However, to balance various system performance parameters, certain optical systems such as those used in remote sensing, adopt undersampling strategies in their design, resulting in spectral aliasing effects that significantly limit the applicability of such methods. In this study, we propose a convolutional neural network (CNN)–long short-term memory (LSTM) hybrid neural network approach for wavefront sensing. By capturing multichannel images and extracting their frequency-domain features, we established a high-precision mapping model between the acquired images and aberration coefficients in undersampled optical systems. The simulation results demonstrate that, with an undersampling factor of 2, the proposed method achieves a wavefront reconstruction root-mean-square error (RMSE) of 0.0082λ across Zernike modes 4–9, with 96 % of the samples exhibiting RMS aberration residuals below 0.035λ. Experimental validation further confirmed its effectiveness in real-world applications. Additionally, this study systematically investigates the effects of key parameters, including the undersampling factor, number of defocus channels, and broadband illumination, on the measurement accuracy and provides a comparative performance analysis with other deep learning networks. This study provides a solution for wavefront sensing in undersampled optical systems, with significant potential applications in remote sensing optical system alignment and real-time wavefront correction for space telescopes.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132379"},"PeriodicalIF":2.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913500","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

Desensitized design of optical systems by evaluating assembly tolerance sensitivity based on Nodal Aberration Theory 基于节点像差理论评估装配公差灵敏度的光学系统脱敏设计

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-26 DOI: 10.1016/j.optcom.2025.132369

Yan Mo , Hao Tan , Huiru Ji , Zhuang Qian , Rundong Fan , Donglin Ma

{"title":"Desensitized design of optical systems by evaluating assembly tolerance sensitivity based on Nodal Aberration Theory","authors":"Yan Mo , Hao Tan , Huiru Ji , Zhuang Qian , Rundong Fan , Donglin Ma","doi":"10.1016/j.optcom.2025.132369","DOIUrl":"10.1016/j.optcom.2025.132369","url":null,"abstract":"<div><div>Nodal Aberration Theory (NAT) provides a robust framework for analyzing aberrations in aberration filed in optical system without symmetry. This paper proposes a NAT-based sensitivity evaluation metric to assess the impact of assembly tolerances on system performance. Traditional sensitivity analysis is often complex and inefficient, and it generally lacks a clear theoretical foundation to guide the evaluation process. The proposed method applied real-ray tracing to calculate the aberrations introduced by misalignments and evaluates the sensitivity of both refractive and reflective systems. This study introduces detailed analysis of individual elements and overall system sensitivity, offering finer insights than conventional approaches. The proposed method is applied to two optical configurations—each with high and low sensitivity modes—and validated through tolerance analysis under identical allocations. It is further employed for the desensitization design of a catadioptric telescope, demonstrating improved robustness. Simulation results confirm the method's feasibility and efficiency, providing a practical tool for evaluating and optimizing optical systems under alignment variations.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132369"},"PeriodicalIF":2.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908845","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

Asymmetric double-layer compact metasurfaces based on phase-progressive diffractive networks 基于相位递进衍射网络的非对称双层紧致超表面

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-25 DOI: 10.1016/j.optcom.2025.132376

Yuyue Yang , Fahad Azad , Zibin Huang , Miaozhang Shen , Shichen Su

{"title":"Asymmetric double-layer compact metasurfaces based on phase-progressive diffractive networks","authors":"Yuyue Yang , Fahad Azad , Zibin Huang , Miaozhang Shen , Shichen Su","doi":"10.1016/j.optcom.2025.132376","DOIUrl":"10.1016/j.optcom.2025.132376","url":null,"abstract":"<div><div>Diffractive deep neural networks (D<sup>2</sup>NNs) based on cascaded phase-only metasurfaces have demonstrated significant potential in all-optical information processing. However, conventional double-layer D<sup>2</sup>NNs are typically confined to symmetric configurations, limiting their utility in tasks requiring asymmetric optical transformations, such as image demagnification. We propose a compact asymmetric double-layer metasurface architecture optimized by a phase-progressive D<sup>2</sup>NN (PP-D<sup>2</sup>NN) network for real-time, subwavelength-scale image demagnification. The method divides second diffractive hidden layer into three functional zones: a central trainable region, a phase-gradient transition zone, and a fixed-phase background. This spatial partitioning strategy enables accurate image reconstruction while reducing the number of trainable elements. A meta-atom library, composed of cylindrical TiO<sub>2</sub> nanopillars on a SiO<sub>2</sub> substrate, is employed to realize the metasurface design. Compared to standard symmetric double-layer D<sup>2</sup>NNs, simulations demonstrate that the proposed PP-D<sup>2</sup>NN reduces the number of trainable diffractive elements by 37.5 % while maintaining comparable image fidelity at a wavelength of 633 nm. In addition, the device supports multi-pattern multiplexing with low crosstalk. These results highlight the potential of our asymmetric diffractive architecture for integrated photonic computing, paving the way for compact, energy-efficient optical neural systems capable of real-time image scaling and parallel inference.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132376"},"PeriodicalIF":2.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908848","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

Data-driven pump power optimization for ultra-wideband C+L-band Raman amplifier: A neural network-based multi-objective intelligent optimization approach 超宽带C+ l波段拉曼放大器数据驱动功率优化：一种基于神经网络的多目标智能优化方法

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-25 DOI: 10.1016/j.optcom.2025.132375

Hengjie Sun , Wenhua Ren , Liuxijun Han , Xue Wei , Hengbo Qi , Yu Tang

引用次数: 0

An adaptation and correction angle algorithm for near-field reflection ptychography 一种近场反射投影的自适应校正角度算法

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-25 DOI: 10.1016/j.optcom.2025.132300

Shuxian Zhao , Feiyu Duan , Xinyu Zhang , Xiaoshuang Shen , Zhaoke Mi , Yusi Zhu , Yanqi Chen , Yunlong Qi , Changjun Ke , Yishi Shi

{"title":"An adaptation and correction angle algorithm for near-field reflection ptychography","authors":"Shuxian Zhao , Feiyu Duan , Xinyu Zhang , Xiaoshuang Shen , Zhaoke Mi , Yusi Zhu , Yanqi Chen , Yunlong Qi , Changjun Ke , Yishi Shi","doi":"10.1016/j.optcom.2025.132300","DOIUrl":"10.1016/j.optcom.2025.132300","url":null,"abstract":"<div><div>We propose an angle adaptation and correction algorithm for reflection ptychography in the near-field visible light, which can accurately determine the reflection angle of objects. The new technique combines the momentum acceleration gradient descent method with the multi-scale clarity evaluation index, and iteratively updates the preset angles. By performing two stages of rough and fine adjustments of the pitch and yaw angles of the sample, it is possible to precisely determine the optimal angular combination. The block-level diffraction distance dynamic compensation mechanism proposed by the algorithm effectively minimizes the error and ensures fast convergence. Experimental validation was performed on three representative samples, including a USAF 1951 resolution target, a phase-only object, and an atomic force microscopy (AFM) test target. The proposed method effectively suppressed defocusing effects within a specific angular range and achieved high-quality reconstruction. It is worth noting that it maintains excellent imaging performance even for phase-only objects that are highly sensitive to angular variations.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132300"},"PeriodicalIF":2.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920116","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

Highly sensitive fiber optic strain and temperature sensor based on mismatched structure and vernier effect 基于错配结构和游标效应的高灵敏度光纤应变温度传感器

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-24 DOI: 10.1016/j.optcom.2025.132372

Jiyuan Cai, Jiahui Fu, Peng Huang, Jialong Luo, Zhichao Hu, Zhongchao Wei, Chunhua Tan, Faqiang Wang, Hongyun Meng

{"title":"Highly sensitive fiber optic strain and temperature sensor based on mismatched structure and vernier effect","authors":"Jiyuan Cai, Jiahui Fu, Peng Huang, Jialong Luo, Zhichao Hu, Zhongchao Wei, Chunhua Tan, Faqiang Wang, Hongyun Meng","doi":"10.1016/j.optcom.2025.132372","DOIUrl":"10.1016/j.optcom.2025.132372","url":null,"abstract":"<div><div>This paper presents a fiber-optic parallel Fabry-Perot interferometer (FPI) sensor based on a mismatched structure and vernier effect, which can simultaneously measure strain and temperature. The sensor comprises two structurally similar fiber-optic FPIs connected in parallel using a 3 dB fiber-optic coupler. Both FPIs feature mismatched fusion spliced structures, with one FPI comprising two single-mode fibers and a section of thin-diameter fiber (TDF), serving as the sensing element, while the other FPI consists entirely of single-mode fibers serves as the reference element. Encapsulating the entire mismatched structure with polydimethylsiloxane (PDMS) forms a sealed Fabry-Perot (FP) cavity, which not only protects the structure but also enhances the sensor's temperature sensitivity by utilizing the high thermo-optic coefficient properties of PDMS. Experimental results demonstrate that the sensor achieves strain and temperature sensitivities of up to 90.5 pm/με (0–900 με) and −2.168 nm/°C (30–65 °C) respectively, with a linearity exceeding 99 %. Furthermore, simultaneous measurement of strain and temperature is achieved by constructing a two-parameter matrix. The presented sensor is characterized by its cost-effectiveness, remarkable sensitivity, excellent operational stability, high measurement precision, and robust resistance to external interference, and has the potential to be deployed in industrial equipment and environmental monitoring.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132372"},"PeriodicalIF":2.5,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932388","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

Global positioning of underwater nodes using airborne-formed visual light beams 利用机载形成的可视光束对水下节点进行全球定位

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-08-23 DOI: 10.1016/j.optcom.2025.132348

Jaeed Bin Saif , Mohamed Younis , Fow-Sen Choa , Akram Ahmed

{"title":"Global positioning of underwater nodes using airborne-formed visual light beams","authors":"Jaeed Bin Saif , Mohamed Younis , Fow-Sen Choa , Akram Ahmed","doi":"10.1016/j.optcom.2025.132348","DOIUrl":"10.1016/j.optcom.2025.132348","url":null,"abstract":"<div><div>The global coordinates of underwater nodes are determined by measuring their relative location to anchors with known GPS (Global Positioning System) positions. These anchors are conventionally provisioned through the deployment of either tethered or floating devices that communicate with the underwater nodes. However, such deployment imposes tardiness and logistical complications and does not suit emerging and covert application scenarios. This paper fills the gap by introducing a novel framework for Global Underwater Localization using Airborne light Beams (GULAB). GULAB utilizes Visible Light Communication (VLC) beams from an airborne unit. By projecting airborne light beams onto a gridded surface area and encoding each beam with location metadata, GULAB forms virtual anchors with known GPS coordinates. Upon receiving an airborne VLC transmission, an underwater node assesses its proximity to the virtual anchor through the received light intensity and depth sensing. The underwater node then applies multilateration to accurately estimate its global coordinate based on all received VLC transmissions. GULAB utilizes both normal and tilted light beams to boost underwater coverage. The simulation results confirm the effectiveness of GULAB in terms of localization accuracy and coverage for both stationary and mobile underwater nodes.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"595 ","pages":"Article 132348"},"PeriodicalIF":2.5,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908847","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