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Challenges using data-driven methods and deep learning in optical engineering 23

Challenges using data-driven methods and deep learning in op...

Conference on current developments in Lens design and optical engineering XXiii Part of SPIE Optics and Photonics Conference

作者： Buquet, Julie Parent, Jocelyn Lalonde, Jean-Francois Thibault, Simon Univ Laval 2325 Rue Univ Quebec City PQ Canada Immervision 2020 Blvd Robert Bourassa Montreal PQ Canada

ISBN: (纸本)9781510654198;9781510654181

Data driven approaches have proven very efficient in many vision tasks and are now used for optical parameters optimization in application-specific camera design. A neural network is trained to estimate images or image quality indicators from the optical characteristics. The complexity and entanglement of such optical parameters raise new challenges we investigate in the case of wide-angle systems. We highlight them by establishing a data-driven prediction model of the RMS spot size from the distortion using mathematical or AI-based methods.

关键词： Computational optics End-to-End design Wide-angle systems Learning-based PSF estimation Distortion Data-driven optical engineering

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Passive athermalization of MWIR optical designs utilizing different infrared optical materials 23

Passive athermalization of MWIR optical designs utilizing di...

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Conference on current developments in Lens design and optical engineering XXiii Part of SPIE Optics and Photonics Conference

作者： Kucukcelebi, Doruk Aydemir, Sukru Emre Roketsan Kemalpasa Mahallesi Sehit Yuzbasi Adem Kutlu Soka TR-06780 Ankara Turkey

ISBN: (纸本)9781510654198;9781510654181

In this paper, different optical designs, which are composed of different MWIR optical materials, are utilized for passive athermalization and their performance in athermalization are analyzed. The optical designs are carried out by preserving the athermal property as well as keeping the image quality at higher levels within the working temperature between -40 degrees C and +60 degrees C. The passive athermalization process begins with the calculation of athermalization conditions of candidate material properties. By considering these conditions, athermal material pairs are chosen. To reduce optical aberrations, aspherical surfaces are utilized during the optimization process. At the end of the design phase, the performance of different configurations of athermal optical material pairs, which are enclosed by aluminum alloy housing material, are presented.

关键词： Athermalization infrared optical design optical material pair Mid Wave Infrared (MWIR)

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Recent advances and perspective in Boron Carbon Nitride and Boron Nitride based materials for photocatalytic energy and environmental applications

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JOURNAL OF WATER PROCESS engineering 2025年 70卷

作者： Sharma, Pankaj Kumar, Amit Dhiman, Pooja Sharma, Gaurav Wang, Tongtong Garcia-Penas, Alberto Lai, Chin Wei Shoolini Univ Int Res Ctr Nanotechnol Himalayan Sustainabil IRCN Bajhol India Xian Univ Architecture & Technol Interdisciplinary & Innovate Res Xian 710055 Peoples R China UPES Sch Hlth Sci & Technol Dept Allied Sci Dehra Dun 248007 India Univ Carlos III Madrid Dept Ciencia & Ingn Mat & Ingn Quim IAAB Leganes 28911 Spain Univ Malaya UM Inst Adv Studies IAS Nanotechnol & Catalysis Res Ctr NANOCAT Kuala Lumpur 50603 Malaysia

There has been an increase in interest with advanced photocatalytic materials due to the increasing importance of sustainable energy solutions and environmental remediation. BCN and BN-based materials have gained significant attention recently for their impressive electronic structures, exceptional chemical stability and interesting optical properties. This article provides a comprehensive analysis of the latest developments in BCN and BN-based photocatalysts. It delves into their structural design, synthesis methods and efforts to enhance their performance in energy conversion and pollutant degradation. In this analysis, we delve into the factors that enhance the photocatalytic activity of these materials like doping with heteroatoms and the engineering of interfaces in heterojunction systems. In addition, we offer an evaluative viewpoint on potential future directions, such as the creation of versatile BCN and BN composites designed specifically for CO2 reduction, hydrogen evolution and environmental decontamination. This analysis seeks to offer a thorough examination of these cutting-edge materials, providing valuable insights into their potential for addressing pulling global energy and environmental issues.

关键词： Keywords Boron carbon nitride Boron nitride Photocatalysis Water treatment Energy conversion

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Spectrally aligned integration of miniaturized substrate-free thin-film filters for fiber optical networks 14

Spectrally aligned integration of miniaturized substrate-fre...

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current developments in Lens design and optical engineering XXIV 2023

作者： Gehrke, Philipp Rüsseler, Anna K. Hoffmann, Gerd A. Wienke, Andreas Kracht, Dietmar Ristau, Detlev Laser Zentrum Hannover e.V. Hollerithallee 8 HannoverD-30419 Germany Welfengarten 1a HannoverD-30167 Germany Gottfried Wilhelm Leibniz Universität Hannover Welfengarten 1 HannoverD-30167 Germany

ISBN: (纸本)9781510665460

This paper presents the active alignment of miniaturized, substrate-free optical thin-film filters (TFFs) according to the filters’ spectral transfer properties for integration into fiber optical networks. optical TFFs are often designed for a specific narrow angle of incidence (AOI) range. Hence, a sufficient manufacturing precision of the angled photonic components connected to the optical filter is needed. These components then can no longer be used for different scenarios where i.e. the incident angle is changed. Conversely, the individual miniaturized optical filter chips can also vary in specification due to slight inhomogeneities during the production on a large-scale wafer. Therefore, not all filter chips on the wafer meet the demanded specifications at the designed AOI, resulting in a reduced yield. Moreover, it requires a time-consuming separation into different quality classes by measuring single filter chips on the wafer. To maximize the amount of usable chips, a procedure was developed to actively align the chips inside a precision optics assembly system by measuring the transmitted power at different wavelengths while tilting them towards the optical axis. When the optimal angle is found, the chip is glued into the optical network platform. Next to maximizing the yield, the production steps can be reduced because the prior separation into quality classes becomes redundant. Manufacturing tolerances during the thin-film deposition are equalized due to the active spectral alignment on a universal optical platform. With this technique, a more versatile process for TFF integration compared to passively aligned assemblies on fixed angle components is demonstrated. © 2023 SPIE.

关键词： Integration

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A Toolkit for Multiscale optical System Inverse-design 23

A Toolkit for Multiscale Optical System Inverse-Design

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Conference on current developments in Lens design and optical engineering XXiii Part of SPIE Optics and Photonics Conference

作者： Campbell, Sawyer D. Jenkins, Ronald P. Zerbe, Benjamin A. Whiting, Eric B. Balasubramanian, Manushanker Das, Arkaprovo Young, Jacob T. Werner, Douglas H. Werner, Pingjuan L. Penn State Univ Sch Elect Engn & Comp Sci University Pk PA 16802 USA

ISBN: (纸本)9781510654198;9781510654181

optical system design is undergoing a transformational change with the increases in computational horsepower, cutting-edge algorithmic developments, and the advent of new nanofabrication technologies. Among the most exciting advances in recent memory are optical metasurfaces, which are patterned surfaces commonly realized through nanofabrication that can imbue optical engineers with expanded degrees of design freedom due to their ability to exploit the generalized form of Snell's law. Through intelligent optimization and design, metasurfaces can be constructed which achieve arbitrary chromatic dispersion behaviors and unprecedented control over polarization that simply cannot be realized with conventional optical elements. However, designing high-performance metasurfaces requires the use of full-wave simulation tools and numerical optimization techniques which necessitate considerable computational resources. Moreover, while optical metasurfaces are moving towards millimeter and centimeter scale diameter lenses with advances in nanofabrication techniques, it is computationally infeasible to employ full-wave simulation tools directly to model optical systems that use such large size elements. Nevertheless, the size, weight, and power (SWaP) advantages afforded by optical metasurfaces make them a compelling choice for designers to consider in a number of applications, which are currently limited by bulky conventional optical solutions. Therefore, techniques that can rapidly model metasurfaces in conjunction with conventional optical elements such as lenses, mirrors, and prisms are highly desirable. In this presentation, we highlight a toolkit of custom solvers, design procedures, and powerful optimization algorithms that simplify and accelerate the development of hybrid optical systems with arbitrary combinations of conventional and metasurface elements.

关键词： optical design optimization inverse-design gradient-index lenses metasurfaces simulation multiscale

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optical design process of a human eye inspired lens 23

Optical design process of a human eye inspired lens

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Conference on current developments in Lens design and optical engineering XXiii Part of SPIE Optics and Photonics Conference

作者： Allain, Guillaume Thibault, Simon Univ Laval Fac Sci & Genie Dept Phys Genie Phys & Opt 1045 Ave Med Laval PQ G1V 0A6 Canada COPL 2375 Rue Terrasse Quebec City PQ G1V 0A6 Canada

ISBN: (纸本)9781510654198;9781510654181

Bio-inspired optical design can be described as a conscious decision in the design process to take inspiration from physical adaptation that were brought up by natural selection. The usual goal is to introduce non-conventional techniques or material in order to achieve better performance or novel applications. However, when the target is to imitate closely the form-factor, appearance and optical properties of a biological system, new requirements are added to the design process and new problems arises. In this paper, we will expose the design of an optical system that draws most requirements from both the optical properties and the form-factor of the human eye. However, contrary to human eye models, the main requirements for this project is to make a realistic design which can be assembled as a prototype. The design process will be laid out, by firstly introducing system requirements and various performance targets that comes from the bio-inspired design. The constraints associated with using entrance pupil's appearance as a requirement will be presented. This paper will also specifically be looking at distortion as a solution for modulating resolution throughout the field of view and as a tool to aid in those novel problems.

关键词： optical design Bio-inspired design Human eye optical design methodology optical Distortion

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Rational ligand design for enhanced carrier mobility in self-powered SWIR photodiodes based on colloidal InSb quantum dots

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NANOSCALE HORIZONS 2024年第5期9卷 817-827页

作者： Chatterjee, Subhashri Nemoto, Kazuhiro Sun, Hong-Tao Shirahata, Naoto Natl Inst Mat Sci NIMS Res Ctr Mat Nanoarchitecton MANA 1-2-1 Sengen Tsukuba 3050047 Japan Hokkaido Univ Grad Sch Chem Sci & Engn Sapporo 0600814 Japan Chuo Univ Dept Phys 1-13-27 Kasuga Bunkyo Tokyo 1128551 Japan Natl Inst Mat Sci CNRS St Gobain NIMS Lab Innovat Key Mat & Struct IRL3629 1-1 Namiki Tsukuba Ibaraki 3050044 Japan

Solution-processed colloidal iii-V semiconductor quantum dot photodiodes (QPDs) have potential applications in short-wavelength infrared (SWIR) imaging due to their tunable spectral response range, possible multiple-exciton generation, operation at 0-V bias voltage and low-cost fabrication and are also expected to replace lead- and mercury-based counterparts that are hampered by reliance on restricted elements (RoHS). However, the use of iii-V CQDs as photoactive layers in SWIR optoelectronic applications is still a challenge because of underdeveloped ligand engineering for improving the in-plane conductivity of the QD assembled films. Here, we report on ligand engineering of InSb CQDs to enhance the optical response performance of self-powered SWIR QPDs. Specifically, by replacing the conventional ligand (i.e., oleylamine) with sulfide, the interparticle distance between the CQDs was shortened from 5.0 +/- 0.5 nm to 1.5 +/- 0.5 nm, leading to improved carrier mobility for high photoresponse speed to SWIR light. Furthermore, the use of sulfide ligands resulted in a low dark current density (similar to nA cm-2) with an improved EQE of 18.5%, suggesting their potential use in toxic-based infrared image sensors. This study demonstrates selective ligand engineering of InSb colloidal quantum dots (CQD) for enhancing the figure of merit of self-powered short-wave infrared (SWIR) photodiodes.

关键词： Semiconductor quantum dots

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Addressing the oxide-aperture dependency of the degradation of 845 nm VCSELs for Silicon Photonics 29

Addressing the oxide-aperture dependency of the degradation ...

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Vertical-Cavity Surface-Emitting Lasers XXIX 2025

作者： Buffolo, Matteo Zenari, Michele De Santi, Carlo Rossi, Francesca Lazzarini, Laura Roelkens, Gunther Larsson, Anders Grabowski, Alexander Gustavsson, Johan Meneghesso, Gaudenzio Zanoni, Enrico Meneghini, Matteo University of Padova Department of Information Engineering Padua35131 Italy IMEM CNR Parma Parco Area delle Scienze 37/A Parma43124 Italy Photonics Research Group Ghent University-imec Gent9052 Belgium Photonics Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology GöteborgSE-412 96 Sweden University of Padova Department of Physics and Astronomy Padua35131 Italy

ISBN: (数字)9781510685178

ISBN: (纸本)9781510685161

Discrete NIR iii-As VCSELs have been used for a long time in the datacom industry. Recently, the integration of such devices onto SiN substrates was successfully achieved by means of micro-transfer printing techniques, thus allowing the use of these devices as the laser sources of next generation PICs for silicon photonics applications. Despite the maturity of modern iii-V epitaxy, previous reports investigating the reliability of these so-called vertical-cavity silicon-integrated lasers (VCSILs) identified the stress-induced relocation of point defects as the main cause for the electrical and optical degradation exhibited by the LDs during accelerated ageing. In this work, we further analyze these processes by evaluating through EL imaging, TEM, numerical modeling and simulations, the variation in the properties of iii-V bottom-emitting VCSELs based on the very same epitaxy and structure. The results indicate that i) the adopted aging procedure does not cause the formation of extended defects in proximity of the oxide aperture, ii) that the observed spreading in the optical beam of the laser is strongly correlated with the increase in series resistance, iii) that the electrical degradation is stronger for smaller oxide apertures, due to the more pronounced crowding of injected current occurring at the top DBR, which determines the overall series resistance of the device. These results further confirm our previous findings and help identify guidelines for the design of reliable VCSELs for future SiPh applications. © 2025 SPIE.

关键词： Silicon photonics

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Generative design and Digital Manufacturing: Using AI and robots to build lightweight instruments 23

Generative Design and Digital Manufacturing: Using AI and ro...

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Conference on current developments in Lens design and optical engineering XXiii Part of SPIE Optics and Photonics Conference

作者： McClelland, Ryan NASA Goddard Space Flight Ctr Greenbelt MD 20770 USA

ISBN: (纸本)9781510654198;9781510654181

Digital engineering technologies are transforming long-stagnant development processes by applying the tremendous advancements in Information Technology (IT) to classical engineering tasks such as design, analysis, and fabrication of space-flight instrument structures. Generative design leverages developments in Artificial Intelligence (AI) and Cloud computing to enable a paradigm shift in the design process, allowing the engineer to focus on defining the requirements and objectives of the design while AI generates optimized designs which comply with the input requirements. Digital Manufacturing allows these complex lightweight designs to be efficiently manufactured by directly fabricating from the resulting 3D models. The development of these two Digital engineering technologies realizes significant mass savings while simultaneously reducing structure development time from months to days. This paper describes the development of the Evolved Structures process applying these technologies to spaceflight optical instrument structures including an example demonstrating greater than 10x reduction in development time/cost and greater than 3x improvement in structural performance.

关键词： Generative design Digital Manufacturing Topology Optimization Evolved Structures AI

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A File Sharing Site for Lens designs 23

A File Sharing Site for Lens Designs

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Conference on current developments in Lens design and optical engineering XXiii Part of SPIE Optics and Photonics Conference

作者： Reiley, Daniel J. Claff, William Burbank (United States) Sherborn (United States)

ISBN: (纸本)9781510654198;9781510654181

A file sharing site for lens designs has been started at *** . This site currently contains almost 2,000 optical models. Many engineering disciplines have built public libraries of useful, publicly-available content. For example, GITHUB(1) has publicly-available software;GrabCAD(2), 3DcontentCentral(3), TurboSquid(4) all offer mechanical engineering content such as solids files;TI, Analog, etc. offer reference designs for electronics engineers. Generally, these services aren't just file repositories;they also offer collaboration, yielding more models, more refinement, more discussion, more community, and more to learn. Lens designers can also benefit from such design libraries. This paper explains the utility and structure of the site.

关键词： Lens design

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