IEEE Photonics Journal最新文献

Crystal’s Self-Alignment for High Power Laser Facility Based on Machine Learning 基于机器学习的高功率激光设备Crystal自对准

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-06-10 DOI: 10.1109/JPHOT.2025.3578673

Yaohan Kang;Daizhong Liu;Xiuqing Jiang;Lei Gong;Xingqiang Lu;Mingying Sun

{"title":"Crystal’s Self-Alignment for High Power Laser Facility Based on Machine Learning","authors":"Yaohan Kang;Daizhong Liu;Xiuqing Jiang;Lei Gong;Xingqiang Lu;Mingying Sun","doi":"10.1109/JPHOT.2025.3578673","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3578673","url":null,"abstract":"Online alignment of harmonic conversion crystal in high-power laser facilities is a challenging and labor-intensive task. An automated technique for self-alignment of crystals on these facilities is proposed based on machine learning. The crystal alignment beam is sampled using grating diffraction. This method employs a machine learning algorithm running on a Raspberry Pi to automatically locate the reflective spot from the crystal’s back surface and adjust its position to achieve alignment. The proposed scheme comprises two modules: a rectangular spiral spot scanning search method module and an automatic spot aligning method module based on the open-source Machine-Learning Online Optimization Package (M-LOOP) algorithm. M-LOOP employs Bayesian optimization based on Gaussian process probabilistic agent model. The combination of these two modules enables automatic adjustment of the laser spot to align with the reference center, thus achieving crystal alignment. The hardware system comprises a crystal alignment optical setup, motors, a CCD camera and a Raspberry Pi. Multiplexed experiments conducted on the SG-II upgraded laser facility demonstrate that the method can complete automatic search and alignment of the crystal’s reflected spot within approximately 10 minutes. This solution addresses the limitations of traditional approaches that require manual search and adjustment of the crystal’s reflected spot for alignment.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 4","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11030231","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144323000","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

Enhanced Bandwidth Tunability in Thermally Controlled Multi-Pitch Contra-Directional Couplers 热控多螺距反向耦合器中增强的带宽可调性

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-06-04 DOI: 10.1109/JPHOT.2025.3576041

Lorenzo Tunesi;Vittorio Curri;Andrea Carena;Paolo Bardella

引用次数: 0

Bandwidth-Variable and Wavelength-Tunable Waveguide Bragg Grating Filter 带宽可变和波长可调波导布拉格光栅滤波器

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-06-02 DOI: 10.1109/JPHOT.2025.3576075

Luyao Xie;Lawrence R. Chen

引用次数: 0

Mechanism and Verification of Photoelectric Regulation Characteristics of Two-Dimensional Photodetectors 二维光电探测器光电调节特性的机理与验证

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-29 DOI: 10.1109/JPHOT.2025.3565277

Jiapeng Zhen;Shuai Huang;Silin Guo;Danping Zhang;Kehong Lv;Jing Qiu;Guanjun Liu

{"title":"Mechanism and Verification of Photoelectric Regulation Characteristics of Two-Dimensional Photodetectors","authors":"Jiapeng Zhen;Shuai Huang;Silin Guo;Danping Zhang;Kehong Lv;Jing Qiu;Guanjun Liu","doi":"10.1109/JPHOT.2025.3565277","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3565277","url":null,"abstract":"Two-dimensional photodetectors have an important property that can improve the optical effect by adjusting the Fermi level, and have outstanding development prospects in the field of visible-infrared photoelectric detection. Here, combined with the surface electronic properties of two-dimensional materials, we analyzed the physical mechanism of the photoelectric effect of a photodetector based on two-dimensional materials. By simulating the light waves of different wavelengths induced on the surface of the photodetector, the changes of its conductivity and absorption rate were analyzed. Since the channel material has an electrically tunable Fermi level, the surface electric field will also be regulated with the Fermi level. Finally, we verified its photoelectric performance by preparing a trilayer graphene device. The results show that the light response of the trilayer graphene photodetector reaches the maximum at 1550 nm, and the surface photoelectric electric field distribution is affected by the Fermi level regulation. Our results show that the performance of graphene photodetectors can be efficiently regulated by Fermi level, which provides theoretical support for the performance improvement and material upgrading of photodetectors in the future.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 3","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10979879","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937955","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

Polymer Waveguide-Based Crossing Waveguides and Adiabatic-Tapered Directional Couplers for Fiber Compatible Optical Interconnect 基于聚合物波导的交叉波导和绝热锥形定向耦合器用于光纤兼容光互连

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-28 DOI: 10.1109/JPHOT.2025.3564794

Xiaofeng Liu;Quandong Huang;Bin Xiao;Quankeng Huang;Jiaqi Ran;Zhanxiong Qiu;Shijie Liang;Qingming Chen;Wenchao Jiang;Zhaoqiang Zheng;Xinyong Dong;Sławomir Ertman;Yuwen Qin

{"title":"Polymer Waveguide-Based Crossing Waveguides and Adiabatic-Tapered Directional Couplers for Fiber Compatible Optical Interconnect","authors":"Xiaofeng Liu;Quandong Huang;Bin Xiao;Quankeng Huang;Jiaqi Ran;Zhanxiong Qiu;Shijie Liang;Qingming Chen;Wenchao Jiang;Zhaoqiang Zheng;Xinyong Dong;Sławomir Ertman;Yuwen Qin","doi":"10.1109/JPHOT.2025.3564794","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3564794","url":null,"abstract":"Photonic integrated circuits have intrinsic merits of high integration, large bandwidth, and flexible design, which play an important role in optical communication systems for the interconnect. To increase the integration and routing of photonic circuits for manipulating the guide modes, we propose a simple and effective fiber compatible crossing waveguide to optimize the device layouts. To demonstrate the idea, we fabricated the device through optical lithography, and then optimized the processing parameters based on the analysis of image processing after fabrication, where the fabricated device shows an insertion loss lower than a maximum 1.0 dB with the crossing waveguides perpendicular to each other and operation wavelength from 1450 nm to 1630 nm for the operation of the E21 and E11 modes. The device offers the ability to manipulate guide modes without being affected by the waveguide crossing, which can provide a powerful way to form fiber compatible integrated photonic circuits.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 3","pages":"1-7"},"PeriodicalIF":2.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10977837","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073082","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: Advances in Heavy-Metal-Free Quantum Dot Shortwave Infrared Photodetectors and Image Sensors: The Case of Ag2Te QDs 光子学突破2024：无重金属量子点短波红外探测器和图像传感器的进展：以Ag2Te量子点为例

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-28 DOI: 10.1109/JPHOT.2025.3564863

Yongjie Wang;Gerasimos Konstantatos

{"title":"Photonics Breakthroughs 2024: Advances in Heavy-Metal-Free Quantum Dot Shortwave Infrared Photodetectors and Image Sensors: The Case of Ag2Te QDs","authors":"Yongjie Wang;Gerasimos Konstantatos","doi":"10.1109/JPHOT.2025.3564863","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3564863","url":null,"abstract":"Shortwave infrared (SWIR) light holds promising applications spanning consumer electronics, industrial automation, and biomedical imaging. The detection of shortwave infrared light lays in the centre of SWIR applications. Conventional SWIR detectors rely on epitaxial semiconductors, which are costly and limited by low manufacturing throughput. Colloidal quantum dots (CQDs) have been developed to unravel these issues and comparable device performances have been achieved after decades’ efforts. While CQDs can offer low-cost alternatives once high-volume maturity level is reached, their widespread adoption in consumer electronics market has been hindered also by concerns on the use of lead/mercury-based materials. Recent advances in heavy-metal-free CQDs, such as silver chalcogenides (Ag2Te) and III-V semiconductors (InAs, InSb), have demonstrated performance metrics, which, in some cases, rival heavy-metal based counterparts. Progress in synthesis, surface passivation, and device engineering have enabled high detectivity (>10¹² Jones), broad spectral tunability (1000–2000 nm), monolithic integration with silicon readout circuits and proof of concept demonstration in image sensor and LIDAR use cases. These breakthroughs position heavy-metal-free CQDs as an environmentally compliant, scalable solution for next-generation SWIR technologies.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 3","pages":"1-7"},"PeriodicalIF":2.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10977840","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139962","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

Low-Threshold Broadband Pulse Generation in an All-Fiber Hybrid Mode-Locked Laser

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-28 DOI: 10.1109/JPHOT.2025.3564789

Tao Che;Zheng Zheng;Xin Zhao

引用次数: 0

KEDM: Knowledge-Embedded Diffusion Model for Infrared Image Destriping 红外图像去条纹的知识嵌入扩散模型

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-28 DOI: 10.1109/JPHOT.2025.3564831

Lingxiao Li;Xin Wang;Dan Huang;Yunan He;Zhuqiang Zhong;Qingling Xia

{"title":"KEDM: Knowledge-Embedded Diffusion Model for Infrared Image Destriping","authors":"Lingxiao Li;Xin Wang;Dan Huang;Yunan He;Zhuqiang Zhong;Qingling Xia","doi":"10.1109/JPHOT.2025.3564831","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3564831","url":null,"abstract":"Infrared imaging systems are widely used across industries. However, their output images often exhibit striped noise due to the nonuniform response of the detection system, which significantly affects image quality and visual fidelity. To address challenges such as incomplete stripe removal, potential loss of image details and textures, and the generation of artificial artifacts during destriping, we propose a novel stripe removal method based on a knowledge-embedded diffusion model (KEDM). This approach effectively integrates the spatial distribution characteristics of stripe noise with an innovative, data-driven diffusion network model, creating a hybrid knowledge and data-driven framework for stripe correction. The core components of KEDM are the latent diffusion model (LDM) architecture and the directional wavelet convolution module (DWCM). Specifically, LDM leverages a pretrained variational autoencoder (VAE) to transform the input image into latent feature space for efficient diffusion propagation, reducing computational complexity while preserving image restoration quality. Meanwhile, DWCM uses wavelet convolution operations to construct prior loss functions for stripe noise, precisely guiding the diffusion reconstruction process to achieve a clean, stripe-free image. Empirical evaluations on several benchmark datasets demonstrate that the proposed KEDM outperforms other state-of-the-art destriping algorithms in terms of visual quality and quantitative metrics, validating its excellent performance.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 3","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10978030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073243","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

Quantum Relay-Assisted Free-Space Optical Communication 量子中继辅助自由空间光通信

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-22 DOI: 10.1109/JPHOT.2025.3563374

Manav R. Bhatnagar;M. K. Arti;Kushagra Bhatnagar

{"title":"Quantum Relay-Assisted Free-Space Optical Communication","authors":"Manav R. Bhatnagar;M. K. Arti;Kushagra Bhatnagar","doi":"10.1109/JPHOT.2025.3563374","DOIUrl":"https://doi.org/10.1109/JPHOT.2025.3563374","url":null,"abstract":"Relay-based quantum communication utilizes intermediate nodes to extend the transmission distanceof quantum signals and mitigate the masking effect caused by obstacles or turbulence in free-space optical (FSO) channels. In this study, we investigate a three-node quantum communication system, where Alice, the transmitter, sends quantum-encoded binary information to Bob, the ultimate receiver, via an intermediate relay node, Charlie. By introducing Charlie, the end-to-end transmission is divided into two shorter FSO links, improving signal stability and reliability in the presence of severe atmospheric turbulence and noise. This work proposes a quantum relaying method specifically designed for FSO links and examines the impact of two-hop relaying in terms of the probability of error. The Helstrom error bound is derived to assess the system's detection limits, while density operator calculations are performed to characterize the quantum relaying setup. In addition, a closed-form expression is obtained for key system performance metrics. The findings offer valuable insights into optimizing quantum relaying strategies for long-distance quantum communication over FSO channels.","PeriodicalId":13204,"journal":{"name":"IEEE Photonics Journal","volume":"17 3","pages":"1-15"},"PeriodicalIF":2.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10972305","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117191","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

Self-Denoising of BOTDA Using Deep Convolutional Neural Networks 基于深度卷积神经网络的BOTDA自去噪

IF 2.1 4区工程技术

IEEE Photonics Journal Pub Date : 2025-04-22 DOI: 10.1109/JPHOT.2025.3563405

Di Qi;Chun-Kit Chan;Xun Guan

引用次数: 0