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检索条件"任意字段=Conference on Optical Modeling and System Alignment at SPIE Optics Photonics Conference"

共 473 条记录，以下是1-10 订阅

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modeling of Waveguiding Interconnect for Coupling to Silicon photonics 14

Modeling of Waveguiding Interconnect for Coupling to Silicon...

引用

conference on optical modeling and Performance Predictions XIV

作者： Liu, Haitian Madsen, Christi K. Texas A&M Univ Elect & Comp Engn College Stn TX 77843 USA

ISBN: (纸本)9781510679184;9781510679191

Grating-coupling techniques are widely used in the silicon photonics platform. However, the alignment between fiber and chip is a significant issue to be solved. To ease alignment tolerances and simplify photonic packaging for grating-based coupling, we proposed and designed a novel waveguiding interconnect. In this paper, a 3D model of the grating-coupler device is developed and tested using BPM-Matlab and CST Studio Suite software package. Diffracted and waveguided light characteristics are studied in detail, and its coupling efficiency and mode overlapping efficiency are examined. A beneficial waveguiding and mode reshaping ability is observed, therefore validating the demonstrated design method.

关键词： grating coupler optical modeling

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Accurate alignment system for photonic based biosensor cartridges 29

Accurate alignment system for photonic based biosensor cartr...

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29th conference on Integrated optics - Devices Materials and Technologies

作者： de Kinkelder, Roy Ebberink, Gerald H. P. Sluiter, Victor I. Chang, Lantian Damen, Cas A. J. Saxion Univ Appl Sci Appl Nanotechnol Res Grp MH Tromplaan 28 NL-7513 AB Enschede Netherlands Saxion Univ Appl Sci Smart Mech & Robot Res Grp MH Tromplaan 28 NL-7513 AB Enschede Netherlands Univ Twente MESA Inst Integrated Opt Syst Grp Drienerlolaan 5 NL-7522 NB Enschede Netherlands

ISBN: (纸本)9781510684867;9781510684874

Photonic biosensors for medical diagnostics have been in development for decades, demonstrating performance equal to or better than other techniques (e.g., ELISA, PCR) in sensitivity, reliability, and time efficiency. For companies to successfully commercialize these sensor products, they must also perform equal or better in price per test and usability. The price per test is largely determined by the costs of the (disposable) cartridge containing the sensor chip and bioactive layer. Eliminating active components from the cartridge can reduce costs but introduces the challenge of coupling light from a source to the sensor chip and back to detectors, particularly in point-of-care settings. This coupling requires a positioning accuracy in the (sub-) micrometer range. We present a proof-of-concept demonstrator system for point-of-care use that integrates a passive alignment step with an active alignment procedure. The passive alignment achieves high initial accuracy when a cartridge is placed in an acceptor slot, finding a "first light" state to enable active alignment. Active alignment fine-tunes the fiber position via actuators to optimize coupling efficiency. Optimal coupling is achieved within 30 seconds, yielding a signal-to-noise ratio (SNR) of 36.5 dB. Repeatability tests with 10 reinsertions of the same cartridge demonstrated passive alignment accuracy of 1.3 x 0.8 mu m across the optical axis. The demonstrator system also enables testing the influence of key parameters like the production accuracy of the cartridges on the initial alignment. The resulting system has shown to comply with the requirements of ease of alignment along with full automation.

关键词： Photonic biosensors Active alignment Disposable cartridges optical alignment Applied research

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Zoom system for Coherent Imaging with No Moving Lens Groups 3

Zoom System for Coherent Imaging with No Moving Lens Groups

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conference on optics and photonics for Advanced Dimensional Metrology III

作者： Austin, Nate Truax, Bruce Zygo Corp Laurel Brook Rd Middlefield CT 06455 USA Diffract Ltd Design Southington CT 06489 USA

ISBN: (纸本)9781510673120;9781510673137

Current variable image magnification methods present problematic issues for high precision metrology instruments. This paper describes a novel approach to providing variable system magnification while avoiding those shortcomings. An optical zoom generally has multiple lens groups moving in concert to simultaneously adjust the effective focal length and maintain focus. Inevitably, the motion of the elements results in image drift and small variations in focus over the zoom range. An alternate approach using turreted fixed focal length lenses can have higher image quality but still suffers from image drift unless great care is taken in alignment of the individual lenses. The variable-zoom method presented has a detector array with at least M*p pixels in each axis, where M is the maximum magnification and p x p is the size of the image array at each zoom. Pixels are binned based on the current magnification such that the final image size at each zoom magnification has a constant pixel array size. The fixed focal length imaging lens utilizes a variable aperture stop which is adjusted to maintain diffraction limited resolution. At low magnification the lens has a large field but requires lower resolution. As magnification increases the variable stop increases in size resulting in a smaller diffraction limited spot over a smaller FoV. The optical system can be much less complex than a traditional zoom and because there are no moving lenses, the image does not drift on the detector and there is no focal shift as the magnification changes.

关键词： Phase-shifting interferometer optical zoom

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Perpendicular optofluidic setup for real time droplet size measurements

Perpendicular optofluidic setup for real time droplet size m...

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International conference on optical MEMS and Nanophotonics (OMN) / SBFoton International optics and photonics conference (SBFoton IOPC)

作者： Schianti, Juliana de Novais Santos, Romulo Ferreira Rondineau, Sebastien R. M. J. de Carvalho, Daniel Orquiza Univ Brasilia Dept Elect Engn Brasilia DF Brazil

ISBN: (纸本)9798350304022

The purpose of this work is to offer a low cost and noninvasive set up aimed at measuring droplet dimensions in real time. The system is composed of an acrylic microfluidic device coupled to a perpendicularly positioned optical fiber, a laser diode light source and a photodetector. This optofluidic system is capable of producing droplets with sizes varying from 250 up to 400 mu m, by changing the inlets flow rates. FEM modeling was introduced in order to understand the transmittance pattern observed while the droplets crossed the optical path.

关键词： optofluidic droplets size measurement optical fiber sensor

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Fifteenth International conference on Information optics and photonics, CIOP 2024

Fifteenth International Conference on Information Optics and...

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15th International conference on Information optics and photonics, CIOP 2024

ISBN: (纸本)9781510686168

The proceedings contain 141 papers. The topics discussed include: scattered light spot phase retrieval and beam quality calculation based on transport-of-intensity equation;terahertz spectral characterization of bituminous coal treated with nitric acid under different conditions;design and analysis of Hermite-Gaussian mode multiplexer based on multi-plane light conversion (MPLC);improved convolutional neural network-based symbol synchronization scheme in MB-OFDM UWBoF system;silicon integrated broadband optical multi-beamformer combining both transmission and reception;accurate high-frequency measurement of electro-optic phase modulators based on optical spectrum analysis and microwave fixture de-embedding;and biophysical modeling of rod photoreceptors based on phototransduction and ionic channel.

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Analysis of the PSF moments of the Simonyi Survey Telescope 11

Analysis of the PSF moments of the Simonyi Survey Telescope

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conference on modeling, systems Engineering, and Project Management for Astronomy XI

作者： Savarese, Salvatore Sanchez, Ricardo Zanmar Schreiber, Laura Braga, Vittorio Schipani, Pietro Fiorentino, Giuliana Di Criscienzo, Marcella Thomas, Sandrine Meyers, Joshua INAF Osservatorio Astron Capodimonte Salita Moiariello 16 I-80131 Naples Italy INAF Osservatorio Astron Roma Via Frascati 33 I-0040 Monte Porzio Catone Italy INAF Osservatorio Astrofis & Sci Spazio Bologna Via Gobetti 93-3 I-40129 Bologna Italy Vera C Rubin Observ Project Off 950 N Cherry Ave Tucson AZ 85719 USA Stanford Univ Kavli Inst Particle Astrophys & Cosmol Stanford CA 94309 USA SLAC Natl Accelerator Lab Menlo Pk CA 94025 USA

ISBN: (纸本)9781510675216;9781510675223

The Simonyi Survey Telescope (SST) at the Rubin Observatory, is nearing completion. Ensuring precise image quality is essential for fulfilling the observatory's ambitious scientific goals. To this end, the Active optics system (AOS) will correct various factors, including gravity-induced aberrations, temperature gradients, and hysteresis. During the commissioning phase, achieving precise alignment of the telescope is critical, particularly given the wide field of view. Small errors can lead to unacceptable off-axis aberrations, especially towards the field's edge. This paper presents an analysis tool of the impact of these aberrations on the in focus PSF moments as detected in the science field. We introduce a simplified model of the optical system under generic misalignments, designed to quickly calculate the distribution of aberrated PSF across the field. By comparing the results obtained from this model with reference data simulated using accurate ray tracing software, we can assess its accuracy and employ it to infer the state of the optical system. This work will provide an additional aid for the Rubin team during the commissioning activities.

关键词： active optics alignment integrated modeling LSST Vera C Rubin

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Research on optical Interconnection system Employing Deep Learning Assisted LDPC Coding 14

Research on Optical Interconnection System Employing Deep Le...

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14th International conference on Information optics and photonics, CIOP 2023

作者： Fan, Jiafei Lei, Wenhao An, Ran He, Jichen Zhou, Lin College of Information Science and Engineering Huaqiao University Xiamen361021 China

ISBN: (纸本)9781510671744

In this paper, an intensity modulation direct detection interconnection system employing modeling-driven neural network (MDNN) assisted low-density parity-check code (LDPC) is proposed and experimentally demonstrated. The weights and biases are utilized to optimize the decoder parameters through model-driven deep learning LDPC decoding processing. Compared with traditional schemes that employ LDPC decoding with high computational complexity and redundancy, the proposed scheme has the advantages of a relatively lower complexity decoder and higher decoding gains. The results show that the MDNN signals can provide a 0.28-dB improvement in receiver power sensitivity and a 46% reduction in complexity in a 10-km IMDD optical four-pulse amplitude modulation interconnection system. © 2023 spie.

关键词： Network coding

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Study of optical coupling efficiency of passive optical alignment technologies applicable for high volume manufacturing 23

Study of optical coupling efficiency of passive optical alig...

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conference on optical Interconnects XXIII

作者： Kim, Do-Won Zhao, Jianbing Oh, Young-Seok Waiyapot, Suttawassuntorn Lau, Wendy Ashok, Archana Mei, Suohai Intel Technol Asia Pte Ltd NPI Team 10 Kallang Ave08-10 Aperia Mall Tower 2 Singapore 339510 Singapore Intel Technol Asia Pte Ltd Silicon Photon Prod Div R&D Team 10 Kallang Ave08-10 Aperia Mall Tower 2 Singapore 339510 Singapore Intel Corp Silicon Photon Prod Div NPI Team 2200 Mission Coll Blvd Santa Clara CA USA Intel Microelect Ltd Silicon Photon Prod Div NPI Team 23-F M Thai TowerAll Seasons Pl87 Wireless Rd Bangkok 10330 Thailand

ISBN: (纸本)9781510659599;9781510659605

Computational study of optical coupling efficiencies of selected passive optical alignment options has done. Passive placement of fiber array optical alignment in V-grooves, and high-precision pick & place aligners have immense potential applicable for high-volume manufacturing with the benefits of advancement of low-tolerance fabrication of SiPIC, micro-optic parts, and fiber array. The tight 1dB- and 3dB-loss alignment tolerances in lateral direction of the fiber array in V-groove array and focusing lens & fiber array can be improved by using beam collimation approach. Combined optical packaging of passive alignment of micro optics such as micro lens array and active alignment of fiber array or refocusing lens-attached fiber array can compensate the cycle time achieving sufficient coupling efficiency. Dedicated design of passive optical alignment structure and process using Si-PIC, fiber array block, and micro optics is a homework of individual developer utilizing currently available techniques to mitigate tight acceptable tolerances.

关键词： Silicon photonics integrated circuits (Si-PIC) coupling efficiency fiber in V-groove focusing lens & fiber array focusing lensed-fiber beam collimation lens system passive alignment high-volume manufacturing (HVM)

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GMT adaptive optics test camera: Conceptual optical design 14

GMT adaptive optics test camera: Conceptual optical design

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conference on optical modeling and Performance Predictions XIV

作者： de Souza, Tiago G. B. Bouchez, Antonin H. Ribeiroa, Rafael A. S. Vieiraa, Tarcio A. Nemati, Bijan D. Demers, Richard Univ Sao Paulo Dept Astron IAG Rua Matao 1226 BR-05508090 Sao Paulo SP Brazil Inst Prof Joao Steiner Instrumentat & Data Sci BR-04043200 Sao Paulo Brazil WM Keck Observ 5-1120 Mamalahoa Highway Kamuela HI 96743 USA Tellus 1 Sci LLC 8401 Whitesburg Dr SE4662 Huntsville AL 35802 USA GMTO Corp 465 N Halstead StSuite 250 Pasadena CA 91107 USA

ISBN: (纸本)9781510679184;9781510679191

The Adaptive optics Test Camera (AOTC) is designed to be an engineering instrument to be used during the Giant Magellan Telescope (GMT) assembly, integration, verification, and commissioning to verify the adaptive optics (AO) system-level diffraction-limited image quality performance. The AOTC will functionally replicate the external interfaces of the GMT AO instruments, including the Natural Guide Star Wavefront Sensor (NGWS) and Laser Tomography Wavefront Sensor (LTWS) as external AO sensors, as well as a prototype On-Instrument Wavefront Sensors (OIWFS) to measure non common-path wavefront errors not sensed by the external sensors. We present the initial optical design of this instrument, which passed a conceptual design review in 2023, as well as a preliminary performance assessment of the OIWFS. The AOTC consists of four cameras. The first is a large field of view camera to aid in the instrument target acquisition. A Shack-Hartmann sensor measures focus and low order wavefront errors in the non-common path between the external sensors and science focal plane. A high-speed imager measures the target motion and telescope segment piston error. Finally, a scoring camera, representing the science camera, evaluates the AO image quality. We describe the optical parameters and the strategies used to achieve each sensor function and attend to their performance requirements, along with the initial choices for commercial detectors for each function. We also present the preliminary performance budget for assessing system performance and determining tolerances for mechanical manufacturing and alignment.

关键词： optical design adaptive optics extreme large telescope performance assessment

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Design and virtual validation of CMOS image sensor camera 9

Design and virtual validation of CMOS image sensor camera

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conference on optical Design and Engineering IX

作者： Gely, Sandra Nazari, Mina Gilleran, T. J. Noygues, Sebastien Meyer, Charly Gomez, Federico Duque Robertson, Taylor Cheng, Michael Vega, David Morales, Angel Chen, Chih-Hao Shin, Dong Sub Cailler, Maxime Ansys Inc 2600 Ansys Dr Canonsburg PA 15317 USA

ISBN: (纸本)9781510673571;9781510673564

CMOS image sensor cameras are widely used in various applications, across industries such as aerospace and defense, automotive, and consumer electronics. With the emergence of high-resolution cameras, obtaining the best image quality is becoming a must-have requirement. There is a growing need to design and optimize each camera component considering image quality of the full system in the targeted application environment. Accurate modeling of such components can be challenging due to multiscale structures going from nanoscale photonics to macroscale optics. To mitigate the modeling problem, Ansys provides ray and wave optics tools [1] to simulate and optimize the design of the different modules of the camera system (lens imaging system, nanoscale pixel structure, digital processing) in a virtual environment with different illuminations, scenes, and scenarios, and evaluate the quality of the complete camera system. The lens system is designed with the optical design software Ansys Zemax opticstudio [2]. Then, an optical Reduced Order Model (ROM) of this lens system is exported to Ansys Speos [3], a ray tracing software embedded in a 3D CAD environment that provides fast yet accurate simulation while accounting for environmental conditions, including artificial and natural light sources. In parallel, Ansys Lumerical provides the quantum efficiency of the sensor by combining FDTD [4], a fully vectorial 3D electromagnetic solver, for the light absorption and CHARGE [5], a 3D charge transport solver, for the probability of collection of photogenerated charges. Light exposure from the 3D scene through the lens system onto the sensor is combined with the quantum efficiency of the sensor to generate raw images. Finally, digital processing allows the generation of the final image. The ROM has been validated by comparing it against full lens system simulations. The MTF50 differs by less than 10% between the models, and the ROM offers between 10 and 100 times speed performance

关键词： CMOS image sensor raytracing multiscale image quality optical design camera 3D scene

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