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检索条件"任意字段=Conference on Design and Engineering of Optical Systems II"

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Addressing large scale photonic design for next-generation systems 12

Addressing large scale photonic design for next-generation s...

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2025 conference on Photonic Instrumentation engineering

作者： Bahl, Mayank Heller, Evan Chalony, Maryvonne Lu, Ming Hsuan Xu, Chenglin Zhu, Ziwei Herrmann, Daniel Cassarly, William Scarmozzino, Robert Synopsys Inc 400 Executive BlvdSuite 100 Ossining NY 10562 USA Synopsys Inc F-83400 Hyeres France Synopsys Hsinchu Taiwan Synopsys Inc 199 S Robles AveSuite 400 Pasadena CA 91101 USA

ISBN: (纸本)9781510684942;9781510684959

In recent years we have seen the proliferation of large-scale photonic devices and systems such as metalens-based cell phone cameras, AR/VR glasses, LIDAR, silicon photonics etc. designing these devices/systems with reasonable speed and accuracy requires a variety of techniques such as multi-level simulations, inverse design, massive parallelization, and judicious choice of numerical methods. In this work we will present an overview of the aforementioned techniques along with several demonstrative examples. For designing metalens based optical systems a multi-level approach is required because of the varied length scales involved, ranging from nm/mu m sized atoms to mm/cm size lenses. The meta-atoms are simulated via rigorous wave-optic techniques to generate parametrized Bidirectional Scattering Distribution Function (BSDF) databases from which the metasurface transfer function can be derived. The propagation between the surfaces in the optical system can be simulated either via the angular spectrum method or ray-optics and the design optimization can be performed using adjoint gradient method. Parametric BSDFs can also be used to characterize and optimize multidimensional surface gratings for AR/VR applications. Combining this with Monte Carlo ray- tracing results in a multilevel simulation approach suitable for designing the optical system and optimizing its performance. Even with these advanced techniques massive parallelization is still needed to make complex real-world applications tractable. This can be achieved through multi-threading on a node, clustering across compute nodes, distributed simulation or job farming, and hardware acceleration via GPUs etc. These parallelization's could be carried out on scalable networks either on premises or on the Cloud. Parallelization combined with the right choice of numerical technique can lead to orders of magnitude of savings in computational time and shorter design cycles through rapid prototyping.

关键词： metalens AR/VR silicon photonics multi-level simulation ray-optics design inverse design GPU FDTD RCWA BPM

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Neural Network-Driven Optimization of Photonic Crystal-Based All-optical NOT Gate design 3

Neural Network-Driven Optimization of Photonic Crystal-Based...

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3rd International conference on Distributed Computing and High Performance Computing, DCHPC 2024

作者： Mohammadi, Alireza Parandin, Fariborz Ghahramani, Hosna Islamic Azad University Kermanshah Branch Department of Computer Engineering Kermanshah Iran Islamic Azad University Kermanshah Branch Department of Electrical Engineering Kermanshah Iran Islamic Azad University North Tehran Branch Department of Computer Engineering Tehran Iran

ISBN: (纸本)9798350381580

This study explores the application of neural networks in optimizing design parameters for an all-optical NOT gate using photonic crystals. It focuses on the unique properties of photonic crystals, highlighting their role in controlling light flow and creating small optical devices. The research introduces a three-layer neural network architecture trained to forecast crucial parameters necessary for the effective functioning of the NOT gate. By conducting systematic simulations, the neural network accurately determines the optimal radius of the rods (R0 and R1), which is essential for the gate's operation. The results obtained, when compared with actual outputs, show an outstanding Mean Absolute Error (MAE) of 0.005 for 'R0' and 0.0006 for 'R1', confirming the model's precision in replicating the behavior of the NOT gate across various input configurations. Through methodical simulations and analyses, the paper illustrates the effectiveness of the neural network in optimizing the rod radius and predicting gate behavior. The main rationale behind employing neural networks was to achieve higher prediction accuracy. The strength of neural networks lies in their capability to handle intricate scenarios, such as dealing with parameters like the lattice constant and the radius of the rods in photonic crystals. In such situations, neural networks offer a robust solution, enabling us to effectively tackle these challenges. © 2024 IEEE.

关键词： Photonic crystals

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design of engineering risk warning and control and real time warning system based on genetic algorithm 4

Design of engineering risk warning and control and real time...

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4th International conference on Smart City engineering and Public Transportation, SCEPT 2024

作者： Li, Jie Guo, Duanhong Wang, Kun State Grid Zhejiang Electric Power Co. Ltd. Jinhua Power Supply Company Zhejiang321000 China

ISBN: (数字)9781510679825

ISBN: (纸本)9781510679818

This paper aims to discuss and design an engineering risk early warning, prevention, and control system based on genetic algorithm (GA), with a specific focus on its application in water resources and civil engineering project management. By incorporating the flexibility and global search capabilities of GA, the system is designed to accurately capture and monitor complex risk relationships in water resources and civil engineering projects in real time. In terms of system design, it utilizes adaptive algorithms for optimal parameter adjustment, enabling the system to adeptly handle the complexities and variabilities inherent in these types of projects. The real-time monitoring mechanism ensures prompt detection and response to changes in engineering risks, thus enhancing the timeliness and accuracy of warnings. Additionally, the paper compares the performance of this GA-based system with systems based on the BP neural network (BPNN). The results demonstrate that the GA-based system is more effective in handling high-dimensional, nonlinear, and dynamic risk factors, providing an innovative approach to risk management in project management and offering decision-makers a more scientific and reliable basis for decision-making © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Genetic algorithms

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Proceedings of the 2023 International conference on Electrical engineering and Photonics, EExPolytech 2023

Proceedings of the 2023 International Conference on Electric...

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2023 International conference on Electrical engineering and Photonics, EExPolytech 2023

ISBN: (纸本)9798350310481

The proceedings contain 113 papers. The topics discussed include: detection of a point dipole signal by a quantum gradiometer under conditions of geomagnetic field variations;MEMS low-magnetic electric heating chip for temperature control of alkali vapor cell;algorithm for modeling fringing fields of multipole ion-optical structures;design and analysis of a reflective-type phase shifter for 5G communication systems;system level simulation of mems pressure sensor;antibacterial activity of Ag, Au and Au/Ag alloy nanoparticles embedded in glass;and application of root-MUSIC algorithm for enhancing spatial resolution of optical coherence tomography images of optical fibers.

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design of Intelligent Energy-saving Lighting Control System Based on ZigBee and NB-IoT Technology 2

Design of Intelligent Energy-saving Lighting Control System ...

引用

2nd International conference on Biomedical and Intelligent systems, IC-BIS 2023

作者： Yuan, Chen Zhou, Linzhi Guangzhou Engineering Institute of Software Guangzhou China Guangzhou Engineering Institute of Software CITI university of Mongolia Guangzhou China

ISBN: (纸本)9781510666733

This paper proposes a design of intelligent energy-saving lighting control system based on ZigBee and NB-IoT technology. The system uses low-cost ZigBee networking scheme for data communication within the street lamp group, collects data to the gateway configured with NB IoT module, designs communication protocol for street lamp application scenarios, and uses it to interact with cloud platform for data, so as to solve the problems of untimely control, vulnerability to interference and small coverage of previous communication technology. The stability of ZigBee network transmission is optimized, And design and implementation of information transmission data to the client. The test results show that the intelligent energy-saving lighting control system based on ZigBee wireless network technology and NB-IoT remote communication technology has the advantages of strong penetration ability, low power consumption, stable and reliable operation, and has strong practicability and promotional value. © 2023 SPIE.

关键词： Control systems

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Development status of a smart lighting system in urban streets

Development status of a smart lighting system in urban stree...

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2023 International conference on Smart Transportation and City engineering, STCE 2023

作者： Wang, Shibo Ma, He Guan, Xiaorong School of Mechanical Engineering Nanjing University of Science and Technology Nanjing210094 China

ISBN: (纸本)9781510673540

With the ongoing evolution of wired/wireless communication technologies and the steady improvement of living standards, the concept of the smart lighting system has transitioned continuously from a mere ideal to a tangible reality. This paper introduces the current development status of urban smart lighting systems around the world. Furthermore, it explores the popular detection technology of movement and light, as well as the progression of wired/wireless communication technologies, comparing their merits and drawbacks and imagining the development of urban smart street *** light of the evidence presented and the potential benefits of the technology, this paper suggests that urban planners and relevant authorities consider the adoption of urban smart street lamps as a viable solution to enhance energy efficiency, safety, and technological advancement in city infrastructure. © 2024 SPIE.

关键词： Energy efficiency

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Coupling strategies for integrated photonics: advances and opportunities 23

Coupling strategies for integrated photonics: advances and o...

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23rd Slovak-Czech-Polish optical conference on Wave and Quantum Aspects of Contemporary Optics

作者： Benedikovic, Daniel Fraser, William Korček, Radovan Medina, David Dominguez-Bucio, Thalia Gardes, Frederic Wilmart, Quentin Jaššák, Jozef Gonda, Matej Litvík, Ján Glesk, Ivan Petrovič, Adam Pikulíková, Viktória Šajban, Matej Edmond, Samson Cheben, Pavel Schimd, Jens H. Alonso-Ramos, Carlos Vivien, Laurent Ye, Winnie N. Faculty of Electrical Engineering and Information Technology University of Zilina Zilina Slovakia Department of Electronics Carleton University Ottawa Canada National Research Council Canada Ottawa Canada Centre de Nanosciences et de Nanotechnologies CNRS Universite Paris-Saclay Palaiseau France Optoelectronic Research Centre University of Southampton Southampton United Kingdom CEA LETI Grenoble France

ISBN: (数字)9781510688094

ISBN: (纸本)9781510688087

Integrated photonics is envisioned as a key enabler for numerous emerging applications, including high-speed communications, ultra-fast optical computing, and quantum information processing. These applications call upon efficient connection between the sub-micrometric planar photonic waveguides and standard optical fibers (SMF-28). Fiber-to-chip optical interfacing has always been recognized as an issue of fundamental importance in the field of integrated photonics, particularly by imposing a critical constraint on the power budget for the chip-scale photonic systems. Hence the direct fiber-chip connection is vastly inefficient with position-restricted accessibility, the key challenge for light coupling involves several factors. This includes geometrical and material discrepancies, different mode field diameters of SMF-28 fibers and photonic waveguides, on-chip design flexibility, and fast optical testing, preferably utilizing available die-level or wafer-scale accessories. In this work, we report on our recent progress in the development of efficient fiber-to-chip optical interfaces based on compact surface grating couplers. We present and discuss prospective design approaches and experimental results for grating-coupled devices implemented on surging silicon (Si) and silicon nitride (SiN) waveguide platforms, supporting advanced photonic integration with coupling efficiencies approaching -1 dB level. © 2025 SPIE.

关键词： Silicon nitride

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Hough Transform-based Correction Method for CCD External Interference of AST3-ii Telescope 4

Hough Transform-based Correction Method for CCD External Int...

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4th International conference on Optics and Image Processing, ICOIP 2024

作者： Chen, Jing-Jian Wang, Liang Zheng, Jie Li, Xiaoyan Li, Zhengyang Nanjing Institute of Astronomical Optics & Technology Chinese Academy of Sciences Nanjing210042 China University of Chinese Academy of Sciences Beijing100049 China CAS Key Laboratory of Astronomical Optics & Technology Nanjing Institute of Astronomical Optics & Technology Chinese Academy of Sciences Nanjing210042 China CAS Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Chinese Center for Antarctic Astronomy Nanjing210008 China

ISBN: (纸本)9781510682481

CCDs (Charge-Coupled Devices) have high sensitivity and low noise characteristics that offer significant ad- vantages for diverse scientific detection applications. However, CCD imaging systems are susceptible to both intrinsic and extrinsic interference due to multiple charge transfers during the readout process. The CCD used in the AST3-ii astronomical telescope located at Dome A in Antarctica has been severely affected by electromagnetic interference, resulting apparent stripes across the entire CCD images. To address this issue, we propose a novel correction method based on the Hough transform that effectively mitigates such interference effects. By applying the correction, we can significantly reduce such risks and enhance the reliability of exoplanet detection. © 2024 SPIE.

关键词： Hough transforms

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Research on construction guide by dynamic compaction under complex foundation condition base on digital equipment 3

Research on construction guide by dynamic compaction under c...

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2023 3rd International conference on Intelligent Traffic systems and Smart City, ITSSC 2023

作者： Zhang, Liming Wang, Lin Tian, Zhenhai Li, Jingkun Luo, Bin The Fourth Engineering Company of CCCC First Harbor Engineering Co. Ltd. Tianjin300000 China

ISBN: (纸本)9781510672963

Through the analysis of each important index in the traditional dynamic compaction construction process, combined with the principle of digital technology, the digital dynamic compaction system was designed and developed. The system combines the actual construction process to realize the functions of design data import, ramming point guide, ramming point location acquisition, ramming times, ramming process quantity, and falling distance monitoring. Meanwhile, combined with big data analysis and wireless transmission, digital dynamic compaction system can display process data in real time, remote control, and strict control of construction quality as well as permanent storage of construction data in the whole process of dynamic compaction construction. The developed system in the study can effectively reduce personnel investment and artificial error, realize the digitization of dynamic consolidation construction process, simplify construction process, and improve construction quality while reducing management cost and personnel cost. © 2024 SPIE. All rights reserved.

关键词： Construction equipment

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Implementation of the sliding window moving target detection algorithm for blade server

Implementation of the sliding window moving target detection...

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2024 International conference on Signal Processing and Communication Security, ICSPCS 2024

作者： Zhou, Bangjian Xu, Fei Wang, Qian Xi'an Electronic Engineering Research Institute Xi'an China

ISBN: (纸本)9781510681699

Moving Target Detection(MTD) technology, as an effective means of suppressing clutter in radar signal processing, has been widely applied to various types of radars. In the development of traditional radar signal processing systems, the hardware computing resources of FPGA+DSP architecture limit the real-time processing performance of MTD, making it difficult for the radar to balance the clutter suppression effect and processing time well. In recent years, with the rapid development of GPUs, their powerful processing performance is gradually being applied to radar signal processing systems. In the process of implementing MTD, GPU relies on its powerful parallel processing ability to quickly suppress clutter and improve the radar's ability to detect moving targets. Starting from the design of the radar signal processing system, this article has completed the implementation of server-based MTD algorithm and the implementation of MTD algorithm in sliding window mode, improving the processing performance of the radar. © 2024 SPIE.

关键词： Clutter (information theory)

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