Optics Communications最新文献_第8页

Bidirectional UV metasurface: Achieving switchable perfect absorption for gas/biosensing and optical shielding 双向紫外超表面：实现气体/生物传感和光学屏蔽的可切换完美吸收

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-16 DOI: 10.1016/j.optcom.2025.132475

Pan Huang, Tong Li, Qian He

{"title":"Bidirectional UV metasurface: Achieving switchable perfect absorption for gas/biosensing and optical shielding","authors":"Pan Huang, Tong Li, Qian He","doi":"10.1016/j.optcom.2025.132475","DOIUrl":"10.1016/j.optcom.2025.132475","url":null,"abstract":"<div><div>UV photonic devices with tailored absorption characteristics are highly desirable for applications ranging from environmental monitoring to biomedical sensing, while achieving simultaneous broadband and narrowband perfect absorption in a single compact structure remains challenging. This study presents an innovative UV absorber capable of bidirectional perfect absorption with distinct spectral characteristics determined by illumination direction. When illuminated from the bottom (-<em>z</em>-axis), across the 185–400 nm band, the structure maintains 98.22 % average absorptivity, with polarization-insensitive and wide-angle absorption. It exhibits an optical shielding efficiency exceeding 100 dB throughout this spectral range, consistently achieved foe both TE and TM polarization over a wide range of incident angles, demonstrating excellent potential for applications in UV protection. Conversely, the top illumination (+<em>z</em>-axis) generates dual ultra-narrowband absorption peaks with near-perfect absorption (99.96 % and 99.76 %). The corresponding full width at half maximum (FWHM) values are 1.5 and 2.7 nm, respectively. Moreover, the absorber demonstrates exceptional sensing performance to be a gas sensor and a biosensor. As a gas sensor, the peak sensitivities are 109.6 nm/RIU and 32 nm/RIU. The corresponding figures of merit reach 109.6 RIU<sup>−1</sup> and 33.68 RIU<sup>−1</sup>, and quality factors are 185.92 and 104.63. The proposed absorber promises potentially valuable applications for ultraviolet protection, sensors, and stealth technology.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132475"},"PeriodicalIF":2.5,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106678","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

Passively Q-switched Tm:YAP laser based on MoS2/CuO heterojunction saturable absorber 基于MoS2/CuO异质结饱和吸收体的被动调q Tm:YAP激光器

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-16 DOI: 10.1016/j.optcom.2025.132479

Xiang Wang , Zhiqiang Long , Weifeng Zhong , Yiheng Yang , Amei Du , Wen Yang , Changhe Sun , Yingjie Shen , Ruijun Lan

引用次数: 0

Optical RIS-collaborative beamforming: A high-efficiency covertness enhancement scheme for VLC system 光学ris -协同波束形成：一种高效的VLC系统覆盖度增强方案

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-15 DOI: 10.1016/j.optcom.2025.132425

Lei Qian , Fangqian Wu , Yong Gao , Di Wang , Yuanhao Wang

引用次数: 0

Development of a snapshot image mapping spectropolarimeter 快照图像映射分光偏振计的研制

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-15 DOI: 10.1016/j.optcom.2025.132473

Pengwei Zhou, Yuqi Zheng, Yangfan Lv, Shihao Zhang, Liang Chen

{"title":"Development of a snapshot image mapping spectropolarimeter","authors":"Pengwei Zhou, Yuqi Zheng, Yangfan Lv, Shihao Zhang, Liang Chen","doi":"10.1016/j.optcom.2025.132473","DOIUrl":"10.1016/j.optcom.2025.132473","url":null,"abstract":"<div><div>Snapshot imaging spectropolarimeters (ISPs) have been widely applied in the field of target detection due to their capability for real-time data acquisition. In this paper, we propose a snapshot image mapping spectropolarimeter (IMSP) based on a broadband liquid crystal polarization grating (LCPG). The system features a compact and concise optical design that enables the simultaneous acquisition of both spectral and polarization information represented by Stokes vector within a single exposure. The IMSP offers 20 spectral channels, covering a spectral range from 450 nm to 850 nm, and is capable of simultaneously measuring the <span><math><mrow><msub><mi>s</mi><mn>0</mn></msub></mrow></math></span> and <span><math><mrow><msub><mi>s</mi><mn>1</mn></msub></mrow></math></span> components of the Stokes vector. This paper presents experimental tests conducted using the IMSP system to evaluate its spectropolarimetric imaging capabilities, and provides the associated experimental results. Furthermore, a rapid calibration and image reconstruction method tailored for IMSP is developed, which effectively corrects spatial and spectral distortions while enhancing overall image quality.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132473"},"PeriodicalIF":2.5,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106735","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

An improved bitwise logic-based trigonometric approximation for holographic computation 一种改进的基于位逻辑的全息计算三角逼近

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-15 DOI: 10.1016/j.optcom.2025.132448

Takashi Nishitsuji , Ren Matsuura , Tomoyoshi Shimobaba , Atsushi Shiraki , Tomoyoshi Ito

{"title":"An improved bitwise logic-based trigonometric approximation for holographic computation","authors":"Takashi Nishitsuji , Ren Matsuura , Tomoyoshi Shimobaba , Atsushi Shiraki , Tomoyoshi Ito","doi":"10.1016/j.optcom.2025.132448","DOIUrl":"10.1016/j.optcom.2025.132448","url":null,"abstract":"<div><div>One of the main technical challenges in electroholography-based three-dimensional (3D) display systems is accelerating the computation of computer-generated holograms (CGH), which function as electronic recording media for 3D images. Since generating CGH through optical propagation calculations heavily relies on the use of trigonometric functions, reducing the computational cost of these functions is an effective approach to speed up the calculations. Notably, holography can preserve the image quality even when some calculations are performed with low precision.</div><div>In this study, we developed a trigonometric function approximation method for holographic computations using a minimal bit-width representation. Specifically, we extended our previous approach — originally designed for specialized computing hardware with a 2-bit input and 1-bit output — to a more expressive model using a <span><math><mi>p</mi></math></span>-bit input (with <span><math><mi>p</mi></math></span> being an arbitrary positive integer) and <span><math><mrow><mo>(</mo><mi>p</mi><mo>−</mo><mn>1</mn><mo>)</mo></mrow></math></span>-bit outputs for the real and imaginary components. The experimental results showed that the proposed method offers significant advantages in terms of hardware implementation feasibility, compact circuit size, and the quality of the reconstructed 3D images, all while incurring only a modest increase in the computational load.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132448"},"PeriodicalIF":2.5,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119246","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

A PGC demodulation algorithm based on harmonic mixing quadrature and differential cross-division for Φ-OTDR systems 一种基于Φ-OTDR系统谐波混合、正交和微分交叉分割的PGC解调算法

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-14 DOI: 10.1016/j.optcom.2025.132467

Fengyu Li , Changcun Yu , Kai Wei , Yuan Liu , Xu Liu , Keyong Shao , Zhaotong Song , Wanchun Zhao , Zhicheng Cong , Chunlei Jiang

{"title":"A PGC demodulation algorithm based on harmonic mixing quadrature and differential cross-division for Φ-OTDR systems","authors":"Fengyu Li , Changcun Yu , Kai Wei , Yuan Liu , Xu Liu , Keyong Shao , Zhaotong Song , Wanchun Zhao , Zhicheng Cong , Chunlei Jiang","doi":"10.1016/j.optcom.2025.132467","DOIUrl":"10.1016/j.optcom.2025.132467","url":null,"abstract":"<div><div>Owing to its high accuracy, linearity, and broad dynamic range, the phase-generated carrier (PGC) demodulation algorithm is widely employed in distributed acoustic sensing (DAS) systems based on phase-sensitive optical time-domain reflectometry (Φ-OTDR). However, conventional PGC demodulation is susceptible to phase modulation depth (C) drift, carrier phase delay (CPD), and light intensity disturbance (LID), leading to linear and nonlinear distortions in the demodulated signal. To mitigate these effects, a PGC phase demodulation algorithm based on harmonic mixing quadrature and differential cross-division (PGC-HMQ-DCD) is proposed for Φ-OTDR systems. The algorithm utilizes phase orthogonality between signals generated by mixing the first and second harmonics with beat-frequency signals to eliminate CPD. Additionally, the differential cross-division method removes modulation depth drift and LID, thereby reducing the influence of all three factors on phase demodulation, without requiring phase unwrapping or feedback control. Simulations consistent with theoretical analysis indicate that the proposed algorithm outperforms other PGC demodulation methods. The experimental results further confirmed the effectiveness of the algorithm in the Φ-OTDR system, which achieved a signal-to-noise ratio (SNR) of 46.1 dB under a 2 km detection range, 10 m spatial resolution, and a background noise level of −68.2 dB rad<sup>2</sup>/Hz. These results demonstrate accurate recovery of vibration-induced phase variations in sensing fibers, confirming the practical applicability of the proposed method.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132467"},"PeriodicalIF":2.5,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106674","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

Multi-shaped perfect vector beam manipulation 多形状的完美矢量光束操纵

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-13 DOI: 10.1016/j.optcom.2025.132465

Ruijian Li , Xiaocen Chen , Yutian Liang , Tong Liu , Zhengliang Liu , Yuan Ren

引用次数: 0

Simultaneous temperature and refractive index sensing using etched few-mode fiber Bragg grating: Cross-sensitivity and mode coupling issues 同时温度和折射率传感使用蚀刻少模光纤布拉格光栅：交叉灵敏度和模式耦合问题

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-13 DOI: 10.1016/j.optcom.2025.132463

Ajay Kumar , Anurag Sharma

{"title":"Simultaneous temperature and refractive index sensing using etched few-mode fiber Bragg grating: Cross-sensitivity and mode coupling issues","authors":"Ajay Kumar , Anurag Sharma","doi":"10.1016/j.optcom.2025.132463","DOIUrl":"10.1016/j.optcom.2025.132463","url":null,"abstract":"<div><div>We examine the performance of a few-mode fiber Bragg grating sensor for refractive index and temperature sensing using <span><math><mrow><msub><mtext>LP</mtext><mn>01</mn></msub></mrow></math></span> and <span><math><mrow><msub><mtext>LP</mtext><mn>11</mn></msub></mrow></math></span> modes. We have obtained sensitivities for temperature and refractive index sensing and have examined in detail the role of cross-sensitivity in simultaneous measurement of these two parameters. We have based our simulation study on the available experimental results. Our study shows that the cross sensitivity is very small and is difficult to quantify reliably. Further, since fiber supports several modes when water or a water-based solution is used as cladding in the sensor, coupling to other modes particularly, the LP<sub>01</sub>-LP<sub>02</sub> mode coupling must be minimized. We have obtained the optimum length to minimize this coupling without compromising the reflection characteristics of the LP<sub>01</sub> and LP<sub>11</sub> modes. Our results match well with the available experimental results.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132463"},"PeriodicalIF":2.5,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158627","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

A beam shaping and collimation technique using freeform optics optimized by NSGA-II NSGA-II优化的自由曲面光学光束整形准直技术

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-13 DOI: 10.1016/j.optcom.2025.132411

Jianing Liu, Ping Jiang, Huajun Yang, Dongyin Wang

引用次数: 0

High-quality multispectral imaging based on edge priors 基于边缘先验的高质量多光谱成像

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-13 DOI: 10.1016/j.optcom.2025.132466

Zonglin Liang , Yuanming Zhao , Keke Ren , Tian Huang , Bo Zhang , Mingxu Piao

{"title":"High-quality multispectral imaging based on edge priors","authors":"Zonglin Liang , Yuanming Zhao , Keke Ren , Tian Huang , Bo Zhang , Mingxu Piao","doi":"10.1016/j.optcom.2025.132466","DOIUrl":"10.1016/j.optcom.2025.132466","url":null,"abstract":"<div><div>In order to more effectively preserve the high-frequency information in multispectral demosaicing image processing, this paper proposes a novel high-quality multispectral demosaicing method based on edge priors. This multispectral demosaicing method aims to restore the image by reconstructing the values of all unsampled bands at each pixel position for the raw images generated by such a multispectral filter array (MSFA). First, the system arranges nine bands in a 4x4 repeating pattern, with the dense band occupying half the space and the other bands each occupying 1/16 of the space. Then, it utilizes differences in directional gradients between neighbor bands to guide the demosaicking process of the dense band. Subsequently, the reconstructed dense band is used as a guide image, and other bands are reconstructed using guided filtering and residual interpolation techniques to achieve more accurate reconstruction results. Experimental results show that the proposed method has significantly improved over the current popular demosaicing technology for nine-band multispectral imaging in terms of Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index (SSIM), and Spectral Angle Mapper (SAM). These results demonstrate that the proposed method can better preserve the local structure and edge information of the original image, effectively reduce the generation of edge artifacts, and thus significantly enhance the reconstruction quality and accuracy of multispectral images.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132466"},"PeriodicalIF":2.5,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106722","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