IEEE Photonics Journal最新文献_第9页

Improving Edge Quality of Liquid Crystal Display 3D Printing Using Local Dimming Method 局部调光法改善液晶显示器3D打印边缘质量

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-01-08 DOI: 10.1109/JPHOT.2025.3527537

Xing-Rui Ding;Zi-Hao Deng;Jia-Sheng Li;Rui-Xiang Qian;Bo-Wen Duan;Zong-Tao Li

{"title":"Improving Edge Quality of Liquid Crystal Display 3D Printing Using Local Dimming Method","authors":"Xing-Rui Ding;Zi-Hao Deng;Jia-Sheng Li;Rui-Xiang Qian;Bo-Wen Duan;Zong-Tao Li","doi":"10.1109/JPHOT.2025.3527537","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3527537","url":null,"abstract":"The burgeoning advancements in Light Emitting Diode (LED) technology have opened avenues for applications beyond traditional display and lighting, notably in the realm of 3D printing. This study introduces a Local Dimming (LD) method that employs LED backlight technology to enhance the edge quality of Liquid Crystal Display (LCD) photocuring 3D printing (LPP). LPP, known for its rapid and cost-effective fabrication, faces challenges with light leakage and precision under high-power ultraviolet (UV) light. By locally adjusting the backlight array's brightness to conform to the digital mask's shape, this study effectively suppresses LCD light leakage and improves edge definition. A comprehensive investigation into the LD method's process parameters—exposure time, pixel compensation coefficient, and initial backlight calculation—reveals significant improvements in print quality. The LD method achieves up to an 81.56% enhancement in dimensional accuracy compared to the conventional full-backlight technique. This research not only addresses the intrinsic light leakage in LCDs but also facilitates the high-resolution printing of complex structures, thus expanding the utility of LED devices in additive manufacturing.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-8"},"PeriodicalIF":2.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10834600","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106176","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

Terahertz Modulation of Even-order Polarization in GaAs 砷化镓中偶级极化的太赫兹调制

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-01-06 DOI: 10.1109/JPHOT.2025.3526152

Jianhua Sang;Haoyu Huang;Liwei Song;Ye Tian;Ruxin Li

引用次数: 0

Simulation and Experimental Study on Frequency Noise of Fabry-Pérot Cavity-Stabilized Laser for Space-Borne Gravitational Wave Detection 用于星载引力波探测的fabry - p<s:1>腔稳定激光器频率噪声仿真与实验研究

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-01-02 DOI: 10.1109/JPHOT.2024.3525047

Chengwen Xing;Yue Li;Tianyao Xu;Zhichao Li;Fanchao Meng;Xiongfei Yin;Lingqiang Meng;Jianjun Jia

引用次数: 0

OCDMA-Based LiDAR Systems: Reducing False Alarm Probabilities in Autonomous Driving 基于 OCDMA 的激光雷达系统：降低自动驾驶中的误报概率

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-31 DOI: 10.1109/JPHOT.2024.3524410

Tianliang Zeng;Jianhua Ji;Leiming Sun;Yufeng Song

{"title":"OCDMA-Based LiDAR Systems: Reducing False Alarm Probabilities in Autonomous Driving","authors":"Tianliang Zeng;Jianhua Ji;Leiming Sun;Yufeng Song","doi":"10.1109/JPHOT.2024.3524410","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3524410","url":null,"abstract":"In this paper, based on the geometric model of mutual interference between LiDAR systems, and according to the Lambert surface radiation law of objects, the expression of the optical power of the reflected signal received by the jamming user is theoretically derived. The effects of interfering user distance and angle of incidence on system performance are analyzed. On this basis, the Optical Code Division Access(OCDMA) technology is used to improve the false alarm probability of the system, and the results show that the use of OCDMA technology can greatly improve the false alarm probability of the system under the condition that the performance of its own probability of detection is not greatly reduced. When the self detection distance and interference distance are both 50 m, the probability of detection remains above 98% after using OCDMA technology, while the false alarm probability decreases from 90% to 2% . Finally, OptiSystem and Matlab were used to simulate and verify the OCDMA LiDAR system, and the simulation values and theoretical values of the system's false alarm probability performance under different interference distances were compared.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 1","pages":"1-7"},"PeriodicalIF":2.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10818717","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489282","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

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

Meijer-G Function With Continued Product and Integer Exponent: Performance of Multi-Aperture UOWC System Over EGG Turbulence 具有连续积和整数指数的Meijer-G函数：多孔径UOWC系统在EGG湍流中的性能

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2024-12-24 DOI: 10.1109/JPHOT.2024.3521430

Arvind Kumar;Nikumani Choudhury;Jayendra N. Bandyopadhyay;S. M. Zafaruddin

{"title":"Meijer-G Function With Continued Product and Integer Exponent: Performance of Multi-Aperture UOWC System Over EGG Turbulence","authors":"Arvind Kumar;Nikumani Choudhury;Jayendra N. Bandyopadhyay;S. M. Zafaruddin","doi":"10.1109/JPHOT.2024.3521430","DOIUrl":"https://doi.org/10.1109/JPHOT.2024.3521430","url":null,"abstract":"Signal transmission over underwater optical wireless communication (UOWC) experiences the combined effect of oceanic turbulence and pointing errors statistically modeled using the sum of two Meijer-G functions. There is a research gap in the exact statistical analysis of multi-aperture UOWC systems that use selection combining diversity techniques to enhance performance compared to single-aperture systems. In this paper, we develop a general framework for the continued product and positive integer exponent for the sum of Meijer-G functions to analyze the exact statistical performance of the UOWC system in terms of multivariate Fox-H function for both independent and non-identically distributed (i.ni.d.) and independent and identically distributed (i.i.d.) channels. We also approximate the performance of a multi-aperture UOWC system with i.i.d. channels using the single-variate Fox-H function. Using the generalized approach, we present analytical expressions for average bit-error rate (BER) and ergodic capacity for the considered system operating over exponential–generalized gamma (EGG) oceanic turbulence combined with zero-boresight pointing errors. We also develop asymptotic expressions for the average BER at a high signal-to-noise (SNR) to capture insights into the system's performance. Our simulation findings confirm the accuracy of our derived expressions and illustrate the impact of turbulence parameters for i.ni.d. and i.i.d. models for the average BER and ergodic capacity, which may provide a better estimate for the efficient deployment of UOWC.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 2","pages":"1-15"},"PeriodicalIF":2.1,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10814056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480812","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