IEEE Photonics Journal最新文献_第4页

Transformed L1 Regularization for Sparse Photoacoustic Tomography 稀疏光声层析成像的变换L1正则化

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-08-06 DOI: 10.1109/JPHOT.2025.3596236

Xueyan Liu;Lu Wang;Xin Wang;Ziqi Hao;Xiaolong Hu

{"title":"Transformed L1 Regularization for Sparse Photoacoustic Tomography","authors":"Xueyan Liu;Lu Wang;Xin Wang;Ziqi Hao;Xiaolong Hu","doi":"10.1109/JPHOT.2025.3596236","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3596236","url":null,"abstract":"Photoacoustic Tomography (PAT) is an advanced imaging technology that combines optical and acoustic methods to visualize the distribution of light absorption within biological tissues with high spatial resolution. The reconstruction of PAT images from incomplete and noisy experimental data is an ill-posed problem that requires regularization techniques to ensure meaningful and stable solutions. In this study, a transform L1 (TL1) regularization model was proposed to improve the quality of PAT images, which was evaluated by numerical simulation and tissue phantom experiments. Based on various numerical and tissue phantom scenarios, Gaussian noise levels of 10 to 30 dB, and multiple parameter configurations, the TL1 method consistently demonstrates shows consistent advantages over the Lp-norm (<inline-formula><tex-math>$0 leq p leq 2$</tex-math></inline-formula>) regularization methods in terms of image quality, computational efficiency, and noise robustness. This finding has important implications for improving sparse sampling PAT algorithms, and also provides valuable insights for the development of biomedical applications in the future.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-11"},"PeriodicalIF":2.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11119050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compact Dual-Mode Adiabatic 3-dB Coupler for the 2-µm Waveband on Silicon Using Fast Quasi-Adiabatic Dynamics 基于快速准绝热动力学的2µm波段硅基紧凑型双模绝热3db耦合器

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-08-06 DOI: 10.1109/JPHOT.2025.3596458

Taichi Muratsubaki;Takanori Sato;Kunimasa Saitoh

引用次数: 0

Transmissive Single-Pixel Grayscale Object Imaging 透射单像素灰度物体成像

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-08-01 DOI: 10.1109/JPHOT.2025.3595148

Zhixing Guo;Chao Zhang;Juntao Huang;Jankun Sun;Yue Zhang;Yonghang Tai;Mengdi Li

{"title":"Transmissive Single-Pixel Grayscale Object Imaging","authors":"Zhixing Guo;Chao Zhang;Juntao Huang;Jankun Sun;Yue Zhang;Yonghang Tai;Mengdi Li","doi":"10.1109/JPHOT.2025.3595148","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3595148","url":null,"abstract":"Single-pixel imaging (SPI) has emerged as a promising technique in computational optics. In transmissive SPI schemes, light must propagate through the imaged object, requiring continuous transmittance values from 0 to 1. Nevertheless, the absence of commercially available submicron array devices featuring tunable transmittance severely restricts the development of grayscale target reconstruction in transmissive systems. To address this limitation, a physically realizable method based on base conversion and checkerboard tiling is proposed, decomposing continuous grayscale information into binary primitives. Through sampling and reconstruction by an SPI system, binary images are generated, after which the grayscale distribution is restored, enabling reflection-independent continuous grayscale recovery. The efficacy of the proposed method is validated via multiple evaluation metrics alongside reconstruction algorithms, including compressive sensing total variation. Experimental results confirm high-fidelity grayscale reconstruction under transmissive conditions.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-6"},"PeriodicalIF":2.4,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11107323","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RS Coded Mixed RF and Multi-Hop FSO System for 5G-CRAN- A Performance Analysis 5G-CRAN- A的RS编码混合射频多跳FSO系统性能分析

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-31 DOI: 10.1109/JPHOT.2025.3594502

Hemanth. C;Sangeetha R. G;Kaushal Karthik K M;Anbarasi K.

{"title":"RS Coded Mixed RF and Multi-Hop FSO System for 5G-CRAN- A Performance Analysis","authors":"Hemanth. C;Sangeetha R. G;Kaushal Karthik K M;Anbarasi K.","doi":"10.1109/JPHOT.2025.3594502","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3594502","url":null,"abstract":"Intensity modulation/direct detection (IM/DD) multi-hop Free Space Optical link system and mixed single-hop RF link performance in serial relaying are examined for the 5G centralized radio access network (C-RAN). While the FSO link utilises a Gamma-Gamma (G-G) distribution channel, the RF link employs a Generalised Nakagami-m fading channel. For the serial relaying method, RF employs the M-ary Quadrature Amplitude Modulation (M-QAM) modulation scheme, whereas FSO uses the Binary Pulse Position Modulation (BPPM) scheme. The decode and forward technique is used in relays. The proposed system’s performance is estimated regarding Average Symbol Error Rate (ASER), Ergodic Channel Capacity, and Outage Probability. The proposed system leverages Reed Solomon’s coding techniques to enhance its performance. The effectiveness of the system is assessed by comparing coded and uncoded systems under various atmospheric weather conditions, including atmospheric turbulence (AT) and pointing error (PE). Monte Carlo simulation validates the results, demonstrating how the system can support 5G applications.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-15"},"PeriodicalIF":2.4,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11106234","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photonics Breakthroughs 2024: Nearfield Observation of Spin-Orbit Interactions at Nanoscale 光子学突破2024：纳米尺度自旋轨道相互作用的近场观测

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-30 DOI: 10.1109/JPHOT.2025.3593859

Jinwei Zeng;Yajuan Dong;Yu Wang;Dengji He;Xiaotong Zhu;Jian Wang

{"title":"Photonics Breakthroughs 2024: Nearfield Observation of Spin-Orbit Interactions at Nanoscale","authors":"Jinwei Zeng;Yajuan Dong;Yu Wang;Dengji He;Xiaotong Zhu;Jian Wang","doi":"10.1109/JPHOT.2025.3593859","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3593859","url":null,"abstract":"The spin-orbit interaction (SOI) of light describes the interaction between spin angular momentum, related to circular polarization, and orbital angular momentum, associated with spatial wavefront structures. While typically trivial in conventional farfield optics, the SOI can become significant at subwavelength scales in the nearfield, where complex vectorial light fields arise. This phenomenon offers exciting prospects for applications in micro-/nano-photonic devices, optical sensing and quantum information technology. In this review, we highlight recent advances in the investigation of the SOI, with particular emphasis on the demonstration of accurate nearfield SOI characterization using photoinduced force microscopy. This technique enables direct, high-resolution mapping of longitudinal and transverse nearfield components of sharply focused optical vortex beams, providing quantitative insight into the spin-to-orbit conversion process. We also discuss existing challenges and outline future directions for exploratory research on the SOI of light in advanced optical systems.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-6"},"PeriodicalIF":2.4,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11103726","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

All Solid Multistep-Index Core Large Mode Area Single-Mode Fiber 全固态多阶折射率芯大模面积单模光纤

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-28 DOI: 10.1109/JPHOT.2025.3592725

Yulai She;Runyu Song;Daiqi Hou;Tiansheng Ling;Jianping Ma

引用次数: 0

Deep Learning-Based Defect Identification for Quantum Key Distribution Devices 基于深度学习的量子密钥分发设备缺陷识别

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-23 DOI: 10.1109/JPHOT.2025.3591925

Xin Sun;Wei-Ping Shao;Pang Lv;Yi-Ning Mao;Qi-Xiang Chen;Hao Wu

{"title":"Deep Learning-Based Defect Identification for Quantum Key Distribution Devices","authors":"Xin Sun;Wei-Ping Shao;Pang Lv;Yi-Ning Mao;Qi-Xiang Chen;Hao Wu","doi":"10.1109/JPHOT.2025.3591925","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3591925","url":null,"abstract":"Quantum Key Distribution (QKD) technology, with its theoretically unconditional security, has demonstrated significant application value in secure communications system. However, under complex operating conditions characterized by strong electromagnetic interference and temperature/humidity changes in practical applications, QKD terminal devices are susceptible to defects such as quantum state preparation errors and decreased detector efficiency. These defects may cause key rate degradation, seriously threatening communication security. Therefore, accurate identification of QKD device defects is crucial. To address this issue, this paper proposes a deep learning (DL)-based defect identification framework for monitoring of QKD equipment operational status. The results demonstrate that the proposed deep learning algorithm exhibits remarkable advantages in complex system environments, achieving a defect identification accuracy of 99.7% . This work not only validates the effectiveness of deep learning algorithms in QKD device defect identification but also establishes a technical foundation for ensuring the stable operation of quantum-secured communication networks.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-8"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11091365","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145036917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bidirectional SMF-FSO-5G NR Wireless Converged Systems With Polarization Multiplexing Technique to Enhance Transmission Capacity 利用偏振复用技术增强传输容量的双向SMF-FSO-5G NR无线融合系统

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-23 DOI: 10.1109/JPHOT.2025.3592119

Ming-Chung Cheng;Stotaw Talbachew Hayle;Hai-Han Lu;Chung-Yi Li;Xu-Hong Huang;Yen-Chen Chen;Chun-Cheng Liang;Jia-Hui Chou;Chi-Hsiang Hsu;Wei-Zhi Jiang

{"title":"Bidirectional SMF-FSO-5G NR Wireless Converged Systems With Polarization Multiplexing Technique to Enhance Transmission Capacity","authors":"Ming-Chung Cheng;Stotaw Talbachew Hayle;Hai-Han Lu;Chung-Yi Li;Xu-Hong Huang;Yen-Chen Chen;Chun-Cheng Liang;Jia-Hui Chou;Chi-Hsiang Hsu;Wei-Zhi Jiang","doi":"10.1109/JPHOT.2025.3592119","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3592119","url":null,"abstract":"This study demonstrates a bidirectional single-mode fiber (SMF)-free-space optical (FSO)-5G new radio (NR) wireless converged system that combines polarization multiplexing and wavelength division multiplexing techniques to enhance transmission capacity. The system achieves an aggregate data rate of 800-Gb/s over a total transmission distance of 41.63-km, comprising 40-km of SMF, a 1.6-km FSO link, and a 27-m 5G NR wireless link. Experimental results indicate excellent transmission performance, with downlink bit error rates (BERs) of 8.13 × 10−5 (x-pol) and 7.76 × 10−5 (y-pol), and uplink BERs of 7.41 × 10−5 (x-pol) and 7.08 × 10−5 (y-pol), which are well below the forward error correction threshold of 3.8 × 10−3. The optimal error vector magnitudes (EVMs) for downlink transmission are 9.14% (x-pol) and 9.39% (y-pol), while the uplink achieves EVMs of 9.6% (x-pol) and 9.78% (y-pol). In contrast, using a unidirectional FSO link in the converged system results in significantly degraded BERs of 1 × 10−3 (x-pol) and 7.59 × 10−4 (y-pol), along with higher EVMs of 11.24% (x-pol) and 11.4% (y-pol) for uplink transmission. These findings emphasize the advantages of bidirectional FSO links in converged systems for enhancing transmission capacity, making them a promising solution for next-generation communication networks.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-15"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11095342","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photonic Generation of Flexible and Adjustable Triangular and Square Waveforms Based on a Comparator 基于比较器的柔性可调三角和方波的光子生成

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-23 DOI: 10.1109/JPHOT.2025.3591879

Jinjian Feng;Yang Jiang;Jing Xu;Xiaohong Lan;Qianyou Long;Yunkun Luo

{"title":"Photonic Generation of Flexible and Adjustable Triangular and Square Waveforms Based on a Comparator","authors":"Jinjian Feng;Yang Jiang;Jing Xu;Xiaohong Lan;Qianyou Long;Yunkun Luo","doi":"10.1109/JPHOT.2025.3591879","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3591879","url":null,"abstract":"A photonic approach to generating triangular and square waveforms using a comparator is proposed. Beginning with a sinusoidal waveform, a comparator comprising two Mach-Zehnder modulators converts the sinusoidal waveform into a square waveform with a 50% duty cycle. Through subsequent multiplication, delayed superposition, and integration operations, square waveforms with duty cycles ranging from 20% to 80% and triangular waveforms with symmetry factors ranging from 20% to 80% are achieved. Adjusting the delay enables flexible tuning of both the duty cycle and symmetry factor. Moreover, frequency-doubled waveforms can be generated by modifying the delay. Detailed theoretical analysis is developed, and the experimental results align closely with theoretical predictions, effectively validating the proposed scheme. This approach offers the advantage of flexible adjustment and generates waveforms entirely through time-domain operations, which better preserves the time-domain characteristics of the waveforms and bypasses the complicated consideration of the amplitudes and phases of harmonic components.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 4","pages":"1-10"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11090012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Routes for Light Management in Monolithic Perovskite/Silicon Tandem Solar Cells 单片钙钛矿/硅串联太阳能电池的光管理途径

IF 2.4 4区工程技术

IEEE Photonics Journal Pub Date : 2025-07-22 DOI: 10.1109/JPHOT.2025.3591383

Michel G. Rocha;Emiliano R. Martins

{"title":"Routes for Light Management in Monolithic Perovskite/Silicon Tandem Solar Cells","authors":"Michel G. Rocha;Emiliano R. Martins","doi":"10.1109/JPHOT.2025.3591383","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3591383","url":null,"abstract":"Fully-textured perovskite/silicon tandem solar cells have emerged as promising candidates for next-generation photovoltaics. The optical functions of full texturing, however, are not yet fully understood. A key challenge is the requirement for perovskite layer texturing, which often leads to increased electrical losses. Here, we elucidate the distinct optical roles of front and rear textures in tandem configurations using optical simulations and use these insights to propose a new architecture that eliminates the need for perovskite surface texturing. We demonstrate that our proposed structure achieves optical results comparable to those of fully-textured devices, while its planar perovskite layer has the potential to reduce electrical losses. The high optical performance also results in higher efficiency if a texture-induced voltage loss as low as 50 mV is assumed, which is about six times lower than the loss of fully-textured devices, thus enabling higher efficiencies within a simplified design. Our results show that perovskite texturing is not essential for optimal light management, thus opening the way to combine efficient light management with high electrical performance.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 5","pages":"1-6"},"PeriodicalIF":2.4,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11087633","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0