Optics Communications最新文献_第9页

High sensitivity Mach-Zehnder optic fiber temperature sensor based on V2C-MXene sensitization

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-06 DOI: 10.1016/j.optcom.2025.131489

Changyu Zhou , Xin Liu , Yue Feng , Tao Shen

引用次数: 0

Stable vortex-array with four singularities generated in a Raman microchip laser

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-06 DOI: 10.1016/j.optcom.2025.131491

Kaiqi Xiang , Xingyu Zhu , Yufei Chen , Hongsen He , Jun Dong

{"title":"Stable vortex-array with four singularities generated in a Raman microchip laser","authors":"Kaiqi Xiang , Xingyu Zhu , Yufei Chen , Hongsen He , Jun Dong","doi":"10.1016/j.optcom.2025.131491","DOIUrl":"10.1016/j.optcom.2025.131491","url":null,"abstract":"<div><div>Optical vortex-arrays with multiple singularities have potential applications in high-capacity optical communication, particle manipulation and high-resolution measurement. Vortex-arrays with desirable spatial distribution of singularities and operating at new wavelengths further extend their applications. Here, an optical vortex-array with four singularities has been achieved in a Yb:YAG/YVO<sub>4</sub> Raman microchip laser pumped with a tilted annular beam. Stable vortex-array with four singularities distributed in a square shape is achieved with simultaneous oscillation of frequency-degenerate modes in an asymmetric resonator with stimulated Raman scattering effect. Stable vortex-array with four singularities oscillates in a wide incident pump power (P<sub>in</sub>) range from 2.8 to 5.7 W. The highest output power is 0.34 W with an optical efficiency of 5.9% for vortex-array with four-singularities at P<sub>in</sub> = 5.7 W. The Raman laser oscillates in TEM<sub>00</sub> mode at P<sub>in</sub> < 2.8 W. Vortex-array with four singularities becomes unstable at P<sub>in</sub> > 5.7 W and vortex-array with six singularities oscillates at P<sub>in</sub> > 6 W. The highest Raman spectral width of vortex array laser is up to 16.8 nm, and 51 longitudinal modes oscillate. Inversion population is extremely important for stability of singularity-controllable Raman laser by transverse-mode locking, the experimental result is consistent with theory in transverse laser and interference pattern. This work of achieving vortex-array with transverse-mode locking creatively provides a compact Raman laser source, which endows more flexibilities in vortex laser applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131491"},"PeriodicalIF":2.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103666","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

Corrigendum to “Study on vibration signals identification method for pipeline leakage detection based on deep learning technology” [Opt Commun 565 (2024) 130588]

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-06 DOI: 10.1016/j.optcom.2024.131469

Chengsan Zhang , Shouling Liu , Wenan Zhao , Lulu Dong , Yu Zhang , Chen Wang , Shuai Qu , Chunmei Yao , Jingsheng Lv , Shujuan Li , Qingchao Zhao , Ying Shang , Guangqiang Liu , Jiasheng Ni

引用次数: 0

Visible light channel modeling and application in underground mines based on transformer point clouds optimization

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-04 DOI: 10.1016/j.optcom.2025.131485

Jianyong Yu , Xiaoli Hu , Qian Wang , Ling Qin , Fengying Wang , Xinchao Kou

{"title":"Visible light channel modeling and application in underground mines based on transformer point clouds optimization","authors":"Jianyong Yu , Xiaoli Hu , Qian Wang , Ling Qin , Fengying Wang , Xinchao Kou","doi":"10.1016/j.optcom.2025.131485","DOIUrl":"10.1016/j.optcom.2025.131485","url":null,"abstract":"<div><div>In the unique environment of mines, the low sensitivity of point cloud acquisition cameras often results in incomplete wall point cloud data. Direct application of this data to channel models can result in significant positioning errors. To address this issue, this paper proposes a DRC-PoinTr deep 3D point cloud optimization model that integrates denoising, registration, and completion (denoising, registration and completion, DRC). To evaluate the impact of wall integrity on visible light positioning, this study creates a wall point cloud dataset that includes real application environments. The DRC-PoinTr model was employed to train the dataset, optimizing the wall point cloud data collected in real-world environments. Then, the triangular mesh of the wall's reflective surface was generated using the Delaunay triangulation approach, and the triangulated wall was applied to the visible light channel model to simulate power distribution under different conditions. Subsequently, the impact of wall optimization on visible light positioning was analyzed. The results showed that in a simulated space of 3 m × 4 m × 2 m, the average received power of the channel model after wall optimization increased by more than 60% compared to the unoptimized model. Furthermore, visible light positioning simulation experiments were conducted based on the optimized channel model. The results demonstrated that the optimized wall channel model achieved a root mean square positioning error of approximately 2 cm, satisfying the positioning accuracy requirements for underground mining environments. Finally, we performed visible light positioning experiments in a real mining environment, demonstrating the process of applying actual measured optical power data for positioning.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131485"},"PeriodicalIF":2.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102894","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

Efficient manipulation of plasmonic hot spots in nanocube-based multiparticle-on-film nanocavities

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-04 DOI: 10.1016/j.optcom.2025.131484

Xiao Yang , Kaixin Guo , Jun Han , Guihua Lu , Peng Li , Min Gao

引用次数: 0

Non-line-of-sight scattering channel modeling of MIMO links for underwater wireless optical communication

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-04 DOI: 10.1016/j.optcom.2024.131468

Peng Yue, XiangRu Wang, DongLing Xu, Shan Xu

{"title":"Non-line-of-sight scattering channel modeling of MIMO links for underwater wireless optical communication","authors":"Peng Yue, XiangRu Wang, DongLing Xu, Shan Xu","doi":"10.1016/j.optcom.2024.131468","DOIUrl":"10.1016/j.optcom.2024.131468","url":null,"abstract":"<div><div>Underwater wireless optical communication (UWOC) holds promising applications for achieving higher data rates and bandwidth in underwater communication. However, significant challenges arise due to high absorption and scattering effects in the underwater environment, coupled with the obstruction of transmission paths by unknown obstacles. Consequently, the development of UWOC technology faces substantial hurdles. In this context, we consider a non-line-of-sight (NLOS) UWOC multiple-input multiple-output (MIMO) configuration to enhance the performance of communication systems. In this paper, we initially utilize Monte Carlo simulations (MCS) to model the NLOS UWOC MIMO channel and then analyze the corresponding path loss and channel impulse response (CIR). An equal gain combining (EGC) method is employed at the receiver to merge the received signals. Subsequently, we use a weighted gamma function polynomial (WGFP) to simulate the CIR of NLOS UWOC MIMO links with an arbitrary number of light sources and detectors. Finally, we use the acquired CIR to calculate the system’s bit error rate (BER) under various configuration conditions. The MCS results indicate that, compared to single-input single-output (SISO) systems, MIMO systems experience a path loss reduction of over 3 dB, and the amplitude of the CIR increases by more than double, the BER performance has also seen significant improvement. Additionally, this validates the effectiveness of the WGFP model under NLOS conditions.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131468"},"PeriodicalIF":2.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102869","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-wavelength and dual-linear polarized omnidirectional beam deflectors

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-04 DOI: 10.1016/j.optcom.2025.131480

Wei Wang , Runhao Wang , Yijia Shi , Shiwang Fan , Rao Fu , Xiangmin Liu

{"title":"Dual-wavelength and dual-linear polarized omnidirectional beam deflectors","authors":"Wei Wang , Runhao Wang , Yijia Shi , Shiwang Fan , Rao Fu , Xiangmin Liu","doi":"10.1016/j.optcom.2025.131480","DOIUrl":"10.1016/j.optcom.2025.131480","url":null,"abstract":"<div><div>Multifunctional metasurfaces have recently attracted great research interest in the field of integrated optics, which are the base of realizing device integration and miniaturization. The dual-wavelength and dual-linear polarized omnidirectional beam deflectors are proposed, in which each nanobrick plays a positive role for two incident light with different wavelengths and polarization states. Two kinds of dual-wavelength and dual-linear polarized omnidirectional beam deflectors with the same and different two-dimensional phase gradients have been designed and investigated. Under the incidences of 532 nm x-linear polarized (XLP) and 633 nm y-linear polarized (YLP) light, two beam deflectors can achieve deflection not only in presupposed perpendicular planes, but also in any plane with arbitrary azimuthal angles (<em>α</em>), so it is called achieving omnidirectional deflection. And the omnidirectional refractions are based on design of phase gradients along any orientations of the metasurface. The uniqueness of these beam deflectors makes this design philosophy very attractive for applications in omnidirectional steering, polarization detection, information processing systems and multi-imaging systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131480"},"PeriodicalIF":2.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104153","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

High quality diameter-variable hollow annular beam generated by two round-tip axicons

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-04 DOI: 10.1016/j.optcom.2025.131486

Xialiang Xu, Xinlan Tang, Huijun An, Huixin Song, Songyou Wang, Lingbao Kong

{"title":"High quality diameter-variable hollow annular beam generated by two round-tip axicons","authors":"Xialiang Xu, Xinlan Tang, Huijun An, Huixin Song, Songyou Wang, Lingbao Kong","doi":"10.1016/j.optcom.2025.131486","DOIUrl":"10.1016/j.optcom.2025.131486","url":null,"abstract":"<div><div>The hollow annular beam generated by an axicon-telescope has advantaged properties such as that the beam inner diameter and ring width are controllable in precision illumination applications. However, the hollow beam generated in practice contains some unwanted light as defect light, several secondary rings and a central spot in the inner region of the main annular beam, which brings in noise signals. In order to study the defect light resources, we study the intensity distributions formed by conventional axicon pair and proposed system based on Fresnel diffraction theory. Then, an optimized optical path design method, named Filter Annular Beam Generation Optical Design (FABGOD), is proposed to eliminate the unwanted light to generate better quality annular beam. The design is based on the typical axicon-telescope, but it eliminates the inner unwanted light. The experimental results show that the beam regulation by FABGOD performs well. In addition, the alignment errors during the optical path build-up are discussed. The present work is a complementary research on hollow annular beam generation based on axicon-telescope, which takes the actual form of the both axicons into account to optimize the optical path, and also provides a new approach to generate annular beams with better quality in an economic way.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131486"},"PeriodicalIF":2.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104129","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

Harnessing epsilon-near-zero materials for tunable accelerating beams in micro-cavities

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-03 DOI: 10.1016/j.optcom.2024.131464

Mahin Naserpour , Carlos J. Zapata-Rodríguez

引用次数: 0

Liquid crystal-based terahertz programmable metasurface with Fano resonance for two-dimensional beam steering

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-03 DOI: 10.1016/j.optcom.2025.131483

Chenxi Liu , Fei Yang , Jiangtao Ji , Xiaojian Fu , Jun Yang , Shuang Peng

{"title":"Liquid crystal-based terahertz programmable metasurface with Fano resonance for two-dimensional beam steering","authors":"Chenxi Liu , Fei Yang , Jiangtao Ji , Xiaojian Fu , Jun Yang , Shuang Peng","doi":"10.1016/j.optcom.2025.131483","DOIUrl":"10.1016/j.optcom.2025.131483","url":null,"abstract":"<div><div>Recently, Reconfigurable Intelligent Surfaces (RIS) have attracted considerable attention among researchers, especially in their applications within the terahertz domain. In this paper, we propose a method to reduce the ratio of unit cells’ size to wavelength by inducing Fano resonances with asymmetric structures and realizing the two-dimensional (2D) beam steering with the reduced-size unit cells. The smaller size of the unit cells allows the sub-array to have enough room for the decoupling structure and bias lines and facilitates the implementation of beam steering in two dimensions. Based on this, a liquid-crystal (LC)-integrated terahertz (THz) reflective programmable metasurface at 0.216 THz is designed, manufactured, and measured. The measured results demonstrate that the metasurface can realize the 2D beam steering function and are in good agreement with the simulation results. This study creatively proposes a new application of asymmetric structures in phase modulation of terahertz waves, thereby significantly reducing the ratio of unit cells’ size to wavelength, and providing much freedom in the metasurface design. It is believed this study has potential applications in imaging, terahertz wireless communication, radar, and related fields.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131483"},"PeriodicalIF":2.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104156","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