Photonics最新文献_第7页

Applications and Development of Multi-Core Optical Fibers 多芯光纤的应用与发展

Photonics Pub Date : 2024-03-19 DOI: 10.3390/photonics11030270

Weiping Chen, Lei Yuan, Bo Zhang, Qianqin Yu, Zhenggang Lian, Yabin Pi, Chongxin Shan, P. Shum

引用次数: 0

Narrow Linewidth 510 nm Laser via Single-Pass Frequency-Tripling by Waveguide PPLNs 通过波导 PPLN 实现单通道频率倍增的窄线宽 510 nm 激光器

Photonics Pub Date : 2024-03-18 DOI: 10.3390/photonics11030269

Yanlin Chen, Jing Zhang, Xiaolang Qiu, Suo Wang, Chuanchuan Li, Haiyang Yu, Xin Wei

引用次数: 0

Modal Phase Modulators Based on Liquid Crystals with 3D-Printed Polymer Microstructures: Increasing Size and Complexity 基于三维打印聚合物微结构液晶的模相调制器：尺寸和复杂性不断增加

Photonics Pub Date : 2024-03-15 DOI: 10.3390/photonics11030266

Alec Xu, Camron Nourshargh, P. Salter, Steve J. Elston, Stephen M. Morris, Martin J. Booth

引用次数: 0

Optimization of Grating Coupler over Single-Mode Silicon-On-Insulator Waveguide to Reach < 1 dB Loss through Deep-Learning-Based Inverse Design 通过基于深度学习的逆向设计优化单模硅绝缘体波导上的光栅耦合器，使其损耗小于 1 dB

Photonics Pub Date : 2024-03-15 DOI: 10.3390/photonics11030267

Chung-Chih Lin, Audrey Na, Yi-Kuei Wu, Likarn Wang, Neil Na

{"title":"Optimization of Grating Coupler over Single-Mode Silicon-On-Insulator Waveguide to Reach < 1 dB Loss through Deep-Learning-Based Inverse Design","authors":"Chung-Chih Lin, Audrey Na, Yi-Kuei Wu, Likarn Wang, Neil Na","doi":"10.3390/photonics11030267","DOIUrl":"https://doi.org/10.3390/photonics11030267","url":null,"abstract":"Grating couplers are essential components in silicon photonics that facilitate the coupling of light between waveguides and fibers. Optimization of the grating couplers to reach <1 dB loss when coupling to single-mode fibers (SMFs) has been reported in the literature, but this was based on silicon-on-insulator (SOI) waveguides supporting multi-modes. In this paper, using a deep-learning model combined with an inverse-design process, we achieve <1 dB losses for grating couplers implemented over single-mode SOI waveguides, i.e., a maximum efficiency of 80.5% (−0.94 dB) for gratings constrained with e-beam (EB) lithography critical dimension (CD), and a maximum efficiency of 77.9% (−1.09 dB) for gratings constrained with deep ultraviolet (DUV) lithography CD. To verify these results, we apply covariance matrix adaptation evolution strategy (CMA-ES) and find that while CMA-ES yields slightly better results, i.e., 82.7% (−0.83 dB) and 78.9% (−1.03 dB) considering e-beam and DUV, respectively, the spatial structures generated by CMA-ES are nearly identical to the spatial structures generated by the deep-learning model combined with the inverse-design process. This suggests that our approach can achieve a representative low-loss structure, and may be used to improve the performance of other types of nanophotonic devices in the future.","PeriodicalId":503623,"journal":{"name":"Photonics","volume":"40 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining Topological Charge of Bessel-Gaussian Beams Using Modified Mach-Zehnder Interferometer 利用改良马赫-泽恩德干涉仪确定贝塞尔-高斯光束的拓扑电荷

Photonics Pub Date : 2024-03-14 DOI: 10.3390/photonics11030263

Mansi Baliyan, N. Nishchal

引用次数: 0

Femtosecond Laser Microfabrication of Artificial Compound Eyes 人工复眼的飞秒激光微细加工

Photonics Pub Date : 2024-03-14 DOI: 10.3390/photonics11030264

Fan Zhang, Huacheng Xu, Qing Yang, Yu Lu, G. Du, Feng Chen

引用次数: 0

Efficient Structure Transformation Based on Sensitivity-Oriented Structure Adjustment for Inverse-Designed Devices 基于灵敏度导向结构调整的高效结构转换，适用于反向设计器件

Photonics Pub Date : 2024-03-14 DOI: 10.3390/photonics11030265

Yuchen Chen, J. Qiu, Zhenli Dong, Lihang Wang, Lan Wu, Suping Jiao, Hongxiang Guo, Jian Wu

{"title":"Efficient Structure Transformation Based on Sensitivity-Oriented Structure Adjustment for Inverse-Designed Devices","authors":"Yuchen Chen, J. Qiu, Zhenli Dong, Lihang Wang, Lan Wu, Suping Jiao, Hongxiang Guo, Jian Wu","doi":"10.3390/photonics11030265","DOIUrl":"https://doi.org/10.3390/photonics11030265","url":null,"abstract":"Inverse-designed devices with thousands of degrees of freedom could achieve high performance in compact footprints, but typically have complex structure topologies that contain many irregular and tiny features and sharp corners, which tend to lead to a poor robustness to fabrication errors. In order to effectively transform the structure of inverse-designed nanophotonic devices into simple structure topologies that have high robustness to fabrication errors without sacrificing device performance, in this paper, we propose a structure adjustment method that innovatively adjusts the structures of inverse-designed devices by introducing their structural sensitivity to the optical performance, extracting the device substructures with high sensitivity and eliminating those with low sensitivity, and, finally, transforming the device structures into simple structure topologies with high robustness and better performance. Two devices (90° crossing and T-junction) were designed and fabrication tolerance simulation was conducted to verify the method. The results show that the devices designed using the proposed method achieved better performance and were more robust to under/over-etched errors.","PeriodicalId":503623,"journal":{"name":"Photonics","volume":"11 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140243844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Demonstration to Enhance the Curvature Sensitivity of a Fiber Mach–Zehnder Interferometer Based on a Waist-Enlarged Technique Using Polymer 利用聚合物腰部放大技术提高光纤马赫-泽恩德干涉仪曲率灵敏度的实验演示

Photonics Pub Date : 2024-03-14 DOI: 10.3390/photonics11030262

L.G. Martinez-Ramirez, I. Hernández-Romano, Cipriano Guzmán-Cano, S. Marrujo-García, A. A. Fernandez-Jaramillo, J. Estudillo-Ayala, R. Rojas‐Laguna, J. M. Sierra-Hernández

引用次数: 0

Saturated Gain-Induced Non-Reciprocal Transmission and Broadband On-Chip Optical Isolator 饱和增益诱导的非互易传输和宽带片上光隔离器

Photonics Pub Date : 2024-03-14 DOI: 10.3390/photonics11030261

Mingyuan Xue, Haojiang Tong, Hao Dong, Meijia Wang

引用次数: 0

Development of Cryogenic Systems for Astronomical Research 开发用于天文研究的低温系统

Photonics Pub Date : 2024-03-13 DOI: 10.3390/photonics11030257

Yurii Balega, Oleg Bolshakov, Aleksandr Chernikov, A. Gunbina, Valerian Edelman, Mariya Efimova, Aleksandr Eliseev, Artem Krasilnikov, Igor Lapkin, Ilya Lesnov, Mariya Mansfeld, M. Markina, Evgenii Pevzner, S. Shitov, Andrey Smirnov, Mickhail Tarasov, Nickolay Tyatushkin, Anton Vdovin, Vyacheslav Vdovin

引用次数: 1