IEEE Photonics Journal最新文献

Polarization Imaging Descattering Based on Dark Channel Prior Background Light Estimation 基于暗通道先验背景光估计的偏振成像散射

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-26 DOI: 10.1109/JPHOT.2024.3523328

Jiarui Zhang;Yaxin Cai;Ming Fang

{"title":"Polarization Imaging Descattering Based on Dark Channel Prior Background Light Estimation","authors":"Jiarui Zhang;Yaxin Cai;Ming Fang","doi":"10.1109/JPHOT.2024.3523328","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3523328","url":null,"abstract":"In turbid water environments, conventional polari-metric imaging descattering methods usually rely on selecting a non-target background region as a substitute for global back-ground light information, leading to image clarity. By integrating polarization imaging with the dark channel prior (DCP) and fully utilizing the polarization information from the Stokes vector and the DCP, the interference of the target information in calculating the background information can be effectively eliminated. This method also enables accurate estimation of the global distribution for the degree of polarization (DoP) and the angle of polarization (AoP) of the backscattered light and eliminates the need for the complex process of background region selection. Experimental results with varying turbid water concentrations demonstrate the proposed method's effectiveness for target recovery in both underwater images with and without background regions. Compared with the conventional active polarization imaging model, our method improves image contrast by 47% in the strongly scattering environment.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10816622","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975939","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

Spectra Narrowing of a 976 nm High Power External-Cavity Semiconductor Laser Based on a Transmission Grating 基于透射光栅的976 nm高功率外腔半导体激光器的光谱窄化

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-25 DOI: 10.1109/JPHOT.2024.3521615

Di Xin;Nihui Zhang;Lingqian Meng;Qinghao Zhao;Weiqiao Zhang;Fengxin Dong;Xuyan Zhou;Hongbo Zhang;Wanhua Zheng

引用次数: 0

Performance Improvement of GaN-Based Vertical-Cavity Surface-Emitting Lasers by Using Tapered SiO2-Buried Structure 采用锥形sio2埋层结构改善gan基垂直腔面发射激光器性能

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-25 DOI: 10.1109/JPHOT.2024.3522498

Rongbin Xu;Yachao Wang;Mingchao Fang;Yang Mei;Leiying Ying;Daquan Yu;Baoping Zhang

{"title":"Performance Improvement of GaN-Based Vertical-Cavity Surface-Emitting Lasers by Using Tapered SiO2-Buried Structure","authors":"Rongbin Xu;Yachao Wang;Mingchao Fang;Yang Mei;Leiying Ying;Daquan Yu;Baoping Zhang","doi":"10.1109/JPHOT.2024.3522498","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3522498","url":null,"abstract":"In GaN-based vertical-cavity surface-emitting lasers (VCSELs) with insulator-buried structure, the strong index guiding will introduce higher order modes. In this paper, we present a novel GaN-based VCSEL with a tapered SiO\u0000<sub>2</sub>\u0000-buried structure by numerical simulations. Compared to conventional flat aperture VCSELs, tapered aperture VCSELs show the lower threshold current and higher slope efficiency, and can be attributed to the improvement of current distribution within the current injection aperture. Moreover, by adjusting the taper length, the current distribution in current injection aperture can be further changed, enabling single fundamental mode lasing. Additionally, the modulation bandwidth for tapered aperture VCSELs will also increase due to the reduction of parasitic capacitance. This research guides the development of high performance GaN VCSELs capable of achieving single transverse mode and high modulation rates for visible optical communication links and networks.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10815608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938234","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

Transponder Aggregator for CDC-ROADM Nodes Supporting S-U Bands and 32/64-WDM Ports 用于CDC-ROADM节点的转发器聚合器，支持S-U频段和32/64-WDM端口

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-23 DOI: 10.1109/JPHOT.2024.3520988

Keita Yamaguchi;Kenya Suzuki;Osamu Moriwaki

{"title":"Transponder Aggregator for CDC-ROADM Nodes Supporting S-U Bands and 32/64-WDM Ports","authors":"Keita Yamaguchi;Kenya Suzuki;Osamu Moriwaki","doi":"10.1109/JPHOT.2024.3520988","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3520988","url":null,"abstract":"In response to the rapid growth in traffic, the throughput and handling unit size of optical network nodes have been increasing at a rate of approximately ten times per decade. To achieve such high node throughputs, it is important to expand the wavelength bandwidth and support more WDM fibers. Therefore, the transponder aggregator (TPA) that provides the colorless, directionless, and contentionless (CDC) function of the network node also needs to respond to these changes. As a TPA suitable for such ultra-high throughput reconfigurable optical add/drop multiplexing (ROADM) nodes, we propose a multicast switch (MCS) that consists of 1 × N splitters and M × 1 switches facing each other and utilizes a silica-based planar lightwave circuit (PLC) platform. The CDC-ROADM nodes have a trade-off between the number of connected WDM fibers and the number of transponders that can be accommodated by a single TPA. Therefore, increasing the WDM fibers results in a decrease in the transponders that can be accommodated by a single MCS, but at the same time reduces the splitting loss in that switch. As a result, the number of optical amplifiers used for add/drop functions can be reduced. In addition, because the handling unit is larger, the increase in the number of required MCS units is limited, and highly integrated PLC-based MCSs become practical. In this paper, we demonstrate MCSs supporting 300-nm bandwidth and 32- and 64-degree nodes for the first time ever. The insertion loss of the prototype was less than 8.0 dB in all paths, including connections with common single-mode fiber, and the extinction ratio was greater than 40 dB.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-7"},"PeriodicalIF":2.1,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10812056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905757","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

Monocular 3D Micro-PIV System Using Computational Imaging 基于计算成像的单目三维微piv系统

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-18 DOI: 10.1109/JPHOT.2024.3520163

Taiyuange Lou;Chengxiang Guo;Tong Yang;Lei Yang;Hongbo Xie

{"title":"Monocular 3D Micro-PIV System Using Computational Imaging","authors":"Taiyuange Lou;Chengxiang Guo;Tong Yang;Lei Yang;Hongbo Xie","doi":"10.1109/JPHOT.2024.3520163","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3520163","url":null,"abstract":"A three-dimensional (3D) particle image velocimetry (PIV) system typically consists of multiple cameras. However, micro-PIV systems for measuring microscale velocity fields lack sufficient space to accommodate them. In this work we propose an alternative approach based on computational imaging, enabling monocular micro-PIV systems to perform 3D flow field measurements without additional hardware or complex structure. The microscopic objective is designed to satisfy the required parameters, and the point spread function (PSF) responses of the system to different depths of the object surface are obtained. Additionally, a particle dataset generation method based on the PSFs of the optical system is proposed, and a deep-learning network is constructed for training. To validate the feasibility, particle images are captured in experiments and inputted into the network to reconstruct depth images and build three-dimensional flow fields. Simulation and experimental results demonstrate that the measurement deviation is within 13.2%, indicating the practicality of the proposed model.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10806749","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905758","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

Constellation Optimization for MIMO VLC System With Signal-Dependent Noise: Receiver-Side Design and Lookup Table Establishment 具有信号相关噪声的MIMO VLC系统星座优化：接收机侧设计和查找表建立

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-16 DOI: 10.1109/JPHOT.2024.3518583

Jiaqi Wei;Yuan Wang;Nuo Huang;Yan-Yu Zhang;Yi-Jun Zhu;Wenliang Hao;Chen Gong

引用次数: 0

A Compact and Broadband Splitter to Interface Between Strip and Slot Waveguides 一种紧凑的宽带分频器，用于连接条形波导和槽形波导

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-16 DOI: 10.1109/JPHOT.2024.3518299

Devika Padmakumar Nair;Michaël Ménard

引用次数: 0

Deploying the Qline System for a QKD Metropolitan Network on the Berlin OpenQKD Testbed 在柏林OpenQKD试验台上部署QKD城域网Qline系统

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-12 DOI: 10.1109/JPHOT.2024.3516138

Matheus Sena;Georg Harder;Ronny Döring;Ralf-Peter Braun;Michaela Ritter;Oliver Holschke;Marc Kaplan;Marc Geitz

{"title":"Deploying the Qline System for a QKD Metropolitan Network on the Berlin OpenQKD Testbed","authors":"Matheus Sena;Georg Harder;Ronny Döring;Ralf-Peter Braun;Michaela Ritter;Oliver Holschke;Marc Kaplan;Marc Geitz","doi":"10.1109/JPHOT.2024.3516138","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3516138","url":null,"abstract":"Quantum Key Distribution (QKD) systems have the potential to provide secure communication by offering unconditionally secure key exchange between distant parties. However, the integration of QKD into existing communication networks presents challenges, particularly when it comes to the deployment of trusted nodes and the establishment of secure connections over metropolitan distances. In this study, we present a novel approach to address these issues by introducing a trusted-node-free design on a metropolitan scale for the seamless integration of a QKD system into the Berlin OpenQKD optical fiber testbed. Our innovative design leverages conventional telecom modulators and a standard Wavelength-Division Multiplexing - Arrayed Waveguide Grating (WDM-AWG), offering a practical solution for flexible multi-partner communication and enabling full connectivity between non-adjacent nodes. In this study, we not only observed relatively low QBER (\u0000<inline-formula><tex-math>$< $</tex-math></inline-formula>\u0000 5.5%) but also a rather stable key rate between nodes in the Qline system over approximately 130 hours (\u0000<inline-formula><tex-math>$approx$</tex-math></inline-formula>\u0000 5.4 days) for a lab-based back-to-back setup. Later on, a more complex experimental scheme is integrated into Berlin OpenQKD optical fiber testbed encompassing multiple C-band frequencies (191.75–195.75 THz) and extending over metropolitan distances (up to 39.8 km), providing a foundation for secure quantum communication networks with enhanced scalability and versatility.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-11"},"PeriodicalIF":2.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10795138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938196","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

Time Delay Signature Extraction of Optical Time-Delay Chaos Systems From Short and Noisy Time Series 从短噪声时间序列中提取光时延混沌系统的时延特征

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-12 DOI: 10.1109/JPHOT.2024.3516115

Shuhui Gong;Jing Zhu;Shiyuan Chen;Jun Wang;Mengfan Cheng;Xiaojing Gao

引用次数: 0

Piezo-Actuated Distributed Bragg Reflector–Based Tunable Fabry–Pérot Filter for Visible Light Hyperspectral Imaging 基于压电驱动分布式Bragg反射镜的可见光高光谱成像可调谐fabry - psamro滤波器

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-11 DOI: 10.1109/JPHOT.2024.3515468

Pratyasha Sahani;Yoshiaki Kanamori

{"title":"Piezo-Actuated Distributed Bragg Reflector–Based Tunable Fabry–Pérot Filter for Visible Light Hyperspectral Imaging","authors":"Pratyasha Sahani;Yoshiaki Kanamori","doi":"10.1109/JPHOT.2024.3515468","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3515468","url":null,"abstract":"A tunable air-gap Fabry–Pérot filter consisting of distributed Bragg reflectors as cavity mirrors was developed to operate in the visible wavelength range. The wavelength tunability of the filter was achieved based on the piezo actuation mechanism. Four in-plane identical piezo actuators were employed to simultaneously achieve both wavelength tunability and cavity air-gap parallelism in the filter. Two pairs of piezo actuators positioned at crossed locations enabled independent control of cavity air-gap dimensions along orthogonal directions in the cavity plane. Optical transmission measurements were performed at different spatial positions on the cavity region to estimate the cavity air-gap dimensions. The initial maximum spectral separation among different spatial positions owing to the initial non-parallelism of the cavity air gap was estimated to be ∼28 nm. After achieving cavity air-gap parallelism via piezo actuation, the final maximum spectral separation was reduced to ∼3 nm. The proposed device configuration significantly improved the cavity air-gap parallelism by minimizing the maximum variation of the cavity air-gap dimension from an initial value of 535 nm to a final value of 18 nm, resulting in an improvement by a factor of ∼30. This device prototype can enable high-resolution and high-throughput spectral transmission with improved spatial uniformity across a large cavity area, showing great promise for advancing hyperspectral imaging systems.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-10"},"PeriodicalIF":2.1,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10791869","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905866","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