bluuebunny/crossref_metadata_2025 huggingface dataset:
fNIRS correlates of attentional states in Brodmann Area 10
Authors: Günal Mehmet , Krawczyk Daniel , Liu Hanli
Published: November 2021

We examined the localization and function of Brodmann Area 10 to specifically investigate its role in maintaining and switching between attentional states using functional near-fnfrared spectroscopy measurements from 18 healthy human brains.
Fourier-Based Quantification of Cerebral Oxygen Pressure Using Phosphorescence Lifetime Microscopy
Authors: Liu Chang , Chisholm Amanda , Fu Buyin , Sencan Ikbal , Sakadžić Sava , Yaseen Mohammad Abbas
Published: November 2021

Phasor analysis provides a simple, Fourier-based method to visualize fluorescence lifetime. Here, we apply the technique for analyzing phosphorescence lifetime measurements and quantify oxygen tension in the cortical microvasculature in awake mice.
Developing biolight-based molecular technologies for simultaneous mapping, imaging, and controlling neural activity
Authors: Crespo Emmanuel Luis , Pal Akash , Prakash Mansi , Gomez-Ramirez Manuel , Zaidi Zohair , Coon Nicholas , Medendorp William , Dash Suneeti , Brown Tariq , Shaner Nathan , Lipscombe Diane , Moore Christopher I , Hochgeschwender Ute
Published: November 2021

We developed bioluminescent probes to image neural activity and harness biological light to serve as a multifunctional optogenetic actuator. This platform technology will enable noninvasive interrogation of activated circuits underlying behavior.
Correlation between socioeconomic disadvantage in preschool children and brain organization: a functional NIRS connectivity study
Authors: Burgess Allie , Hernandez Samuel Montero , Li Xinge , Bick Johanna , Pollonini Luca
Published: November 2021

Socioeconomic status (SES) has been shown to be related to brain development and cognitive performance. We present a functional NIRS connectivity analysis in children with different SES during a working memory task.
Applying an Iterative Filtering Method for Optical Fringe Patterns Preprocessing
Authors: Rogalski Mikołaj , Pielach Mateusz , Cywińska Maria , Cicone Antonio , Trusiak Maciej
Published: November 2021

We adapt the Iterative Filtering signal processing technique for fringe pattern preprocessing and modify it with a novel fringe extension algorithm. We compare its performance with state-of-the-art empirical mode decomposition and variational image decomposition methods.
Bounce-Flash Lidar
Authors: Henley Connor , Raskar Ramesh
Published: November 2021

We demonstrate a new lidar imaging method called bounce-flash lidar, in which the time-of-flight and intensity of two-bounce returns are used to estimate the depth and reflectance of points which are not illuminated directly.
Wide field coded aperture super resolution imaging
Authors: Wang Bowen , Zou Yan , Zuo Chao
Published: November 2021

We report a new computational super-resolution imaging technique, termed as coded aperture super-resolution imaging, which is to modulate the point spread function of the imaging system by rotating the aperture pattern in the infrared band.
Compressed Single-Shot Photoacoustic Image Reconstruction of a 3D Pressure Distribution
Authors: Green Dylan , Gelb Anne , Luke Geoffrey
Published: November 2021

We introduce a method for volumetric photoacoustic imaging from a single laser shot using compressive sensing. We demonstrate the accuracy and efficiency of a 3D pressure distribution reconstruction.
Deep Phase Retrieval by a Learnable Filtered Spectral Initialization
Authors: Morales David , Jerez Andrés , Arguello Henry
Published: November 2021

This work proposes a deep neural network approach for the phase retrieval problem, which learns a filtered spectral initialization. Simulation results show that the proposed approach requires fewer snapshots and power iterations than state-of-the-art.
Image quality improvement in Fresnel zone aperture-based lensless camera with ptychography-inspired reconstruction
Authors: Yamaguchi Keita , Brady David J.
Published: November 2021

To overcome the resolution and noise limits in Fresnel zone aperture-based lensless cameras, two types of multi-shot imaging are proposed. Simulated results show these methods successfully suppress the effect of sensor noise and diffraction.
Compressive Sampling Using a Pushframe Camera
Authors: Bennett Stuart , Noblet Yoann , Griffin Paul , Murray Paul , Marshall Stephen , Jeffers John , Oi Daniel K. L.
Published: November 2021

Pushframe parallellized single pixel camera imaging utilizes scanning motion to apply linear sampling masks to rapidly compressively sense a scene. We demonstrate strongly performing static binarized noiselet mask designs, tailored for pushframe hardware.
Compressed-domain Classification Algorithm for Spectral Imaging Based on Designed Single-Pixel Camera Codification
Authors: Sanchez Karen , Hinojosa Carlos , Garcia Hans , Arguello Henry , Castillo Sergio
Published: November 2021

In a CSI classification task, it is necessary to a reconstruction process in most cases. In contrast, an approach for classification tasks of SPC avoiding the reconstruction process is presented with an accuracy of 97.72%.
Ptychographic optical coherence tomography
Authors: Du Mengqi , Loetgering Lars , Eikema Kjeld S.E. , Witte Stefan
Published: November 2021

We present a high-resolution, phase sensitive, and depth-resolved computa- tional imaging technique, termed ptychographic optical coherence tomography (POCT). We show 3D reconstructions of an axially discrete nano-lithographic structure and an axi- ally continuous mouse brain sample.
Video-Rate Volumetric Imaging of Extended Structures with Engineered PSFs
Authors: Olesker Daniel , Harvey Andrew R. , Taylor Jonathan M.
Published: November 2021

Imaging dynamic processes in 3D with high temporal resolution is a key challenge in fluorescence microscopy. By combining pupil-plane-engineering with a novel deconvolution algorithm we demonstrate a hybrid method that provides true snapshot volumetric imaging.
Robustly detecting imaging model mismatches and reconstruction artifacts in single-molecule localization microscopy
Authors: Mazidi Hesam , Ding Tianben , Nehorai Arye , Lew Matthew D.
Published: November 2021

We demonstrate Wasserstein-induced flux (WIF) for measuring localization stability in localization microscopy. Without knowing the ground truth structure being im- aged, WIF detects model mismatch within reconstruction algorithms and nanoscale imag- ing artifacts with high sensitivity.
Correlation plenoptic tomography
Authors: Stoklasa B. , Hradil Z. , Paúr M. , Řeháček J. , D’Angelo M. , Pepe F.V. , Di Lena F. , Scagliola A.
Published: November 2021

We proposed a novel tomography approach to the correlation plenoptic imaging of objects described by a distribution of the absorption coefficients. Using the maximum-likelihood absorption tomography we overcome classical plenoptic refocusing algorithm avoiding reconstruction artifacts.
Curved Holographic Waveguide Combiner for HUD and AR Display
Authors: Blanche Pierre-Alexandre , Draper Craig T.
Published: November 2021

Waveguide combiners for head up display (HUD) and augmented reality (AR) have the unique advantage to decouple the field of view from the eye box size thanks to pupil replication. However, in order for the image to propagate without aberration in the waveguide, its surfaces have been kept flat and parallel. Here we are presenting a curved waveguide with pupil replication that takes advantage of holographic optical elements for light injection and extraction, while compensating for propagation aberration. Both ray tracing model and early experimental demonstrator are discussed.
Hologram Reconstruction using cascaded deep learning networks
Authors: Choo Hyon-Gon , Ju Yeon-Gyeong , Oh Kwan-Jung , Lim Yongjun , Park Jae-Hyeung
Published: November 2021

Deep learning technology is one of the emerging topics in solving problems in all scientific fields. In this paper, we address a hologram reconstruction method using cascaded multitask networks. A cascaded network consists of two U-net networks. The first is used for conversion between hologram plane and image plane and the other is used for extraction of image and depth. To train the network, we simulate an optical holographic microscopy setup. Experimental results show that the proposed approach can restore effectively complex optical fields and depth information.
JPEG Compression Scheme in Dynamic Speckle Imaging
Authors: Stoykova Elena , Nazarova Dimana , Nedelchev Lian , Park Joongki
Published: November 2021

Application of the JPEG compression scheme to dynamic speckle patterns captured for visualization of faster or slower changes in 3D objects is analyzed. Compression efficiency is proven by simulation and experiment.
Acousto-Optical Tunable Filters: Applications in 3D Imaging and Multi-Wavelength Digital Holography
Authors: Machikhin Alexander
Published: November 2021

Arbitrary spectral access, multi-wavelength selection and transmission function apodization are key features of acousto-optical tunable filters. These capabilities may have multiple applications in interference imaging including multi-wavelength digital holography and spectral-domain optical coherence tomography.
Augmented reality three-dimensional displays based on a holographic optical element fabricated by wavefront printer
Authors: Wakunami Koki
Published: November 2021

Several types of augmented reality three-dimensional display systems are introduced. All systems consist of a holographic optical element fabricated by wavefront printing technique to be used as an optical functional screen.
Holographic properties and display of photopolymer with high concentration photoinitiator doped with SiO2 Nanoparticles [Invited]
Authors: Zhang Yaping , Chen Huixin , Zhang Jingyuan , Zhang Yongan
Published: November 2021

Irgacure 784/PMMA polymers doped with SiO2 nanoparticles are studied. We have performed holographic display and measured diffraction efficiency with different concentrations of the photoinitiator with and without the nano-particles.
Learning-based method for speckle noise reduction of numerically reconstructed holograms without recording experimental datasets for its training
Authors: Jurado-Torres S. , Trujillo C.
Published: November 2021

A convolutional autoencoder for speckle noise reduction of numerically reconstructed holograms is presented. The neural network is trained with a generic open dataset whose images are preprocessed to emulate speckle noise. Experimental validation is provided.
Towards X-ray Plenoptic Imaging: Emulation with a Laboratory X-ray Scanner
Authors: Viganò Nicola , Lucka Felix , de La Rochefoucauld Ombeline , Coban Sophia Bethany , van Liere Robert , Fajardo Marta , Zeitoun Philippe , Batenburg Kees Joost
Published: November 2021

X-ray plenoptic apparatuses acquire multi-view single-shot radiographs, but their development is challenging. We present a physical emulation setup for rapidly and inexpensively exploring their design parameter-space, that only uses a flexible laboratory X-ray scanner.
High Performance Phase Retrieval Code for 3D Nanometer Scale Strain Mapping
Authors: Townsend McKayla , Frosik Barbara , Taylor Hyrum , Schnebly Landon , Sandberg Richard L. , Pateras Anastasios , Clark Jesse , Cha Wonsuk , Harder Ross J.
Published: November 2021

Nanometer scale 3D strain maps of metal nanocrystalline grains were imaged with x-ray Bragg coherent diffraction imaging while being heated to 713
◦
C using a python-based, high-performance iterative phase reconstruction code called ‘Cohere.’
Incoherent Range-Based Holography of Far-Distant Objects Using LIDAR
Authors: Hoffmann Mitchell P. , Dallmann Nicholas A. , Carlsten Bruce E. , Coblentz Malakai P. , Thompson David C. , Palmer David
Published: November 2021

LANL has developed an incoherent, long-range, sub-centimeter resolution LI-DAR. With novel imaging algorithms, this technology allows holography of distant objects. We discuss algorithms and demonstrations of holography at 10 km range.
Dual-frame demodulation based on an advanced vector normalization technology
Authors: Zhang Hangying , Zhao Hong , Cao Liangcai
Published: November 2021

A set of sine and cosine components are constructed through the addition and subtraction of dual-frame interferograms. We propose a method based on advanced vector normalization technology to achieve dual-frame fringe pattern phase extraction.
Phase imaging using the incoherent lattice light-sheet (IHLLS) detection module
Authors: Potcoava Mariana , Mann Christopher , Art Jonathan , Alford Simon
Published: November 2021

We present phase images of neuronal structures within a biological test sample using the incoherent holography lattice light-sheet (IHLLS) microscope detection methodology.
Digital holographic microscopy for photolithographic surface patterning
Authors: Berdin Alex , Rekola Heikki , Virkki Matti , Fedele Chiara , Priimägi Arri
Published: November 2021

Surface patterning of azobenzene-containing thin films using digital holography microscopy with built-in laser interference setup points a way to rapid prototyping of diffractive optical elements (DOEs). The light-induced mass-migration of photochromic materials enables the inscription of topographies in a one-step photolithographic process, which is a challenge to existing microfabrication methods. A method for real-time observation of surface modifications enables the study and control of the inscribed patterns.
Toward a 3D Velocity Interferometer Testbed: Early Results
Authors: Erskine David J. , Celliers P. M. , Davies E. J. , Ali S. J. , Eggert J. H. , Hutchinson T. M. , Smith R. F.
Published: November 2021

We present preliminary results from a multi-plane camera, exploring 3D image reconstruction of a high speed velocimetry target beyond a single depth of field.
Chemical amplification enhanced measurements of peroxy radicals by photoacoustic spectroscopy
Authors: Wang Gaoxuan , Lahib Ahmad , Duncianu Marius , Gou Qian , Stevens Philip S. , Dusanter Sébastien , Tomas Alexandre , Sigrist Markus W. , Chen Weidong
Published: November 2021

A novel approach for the measurements of peroxy radicals is demonstrated which relies on chemical amplification enhanced photoacoustic spectroscopy detection after chemical conversion of peroxy radicals into NO2. A 1-σ limit of detection of about 12 pptv for peroxy radicals was achieved in an integration time of 90 s at a relative humidity of about 9.8%.
Mid-infrared methane sensing using interband cascade laser and anti-resonant hollow-core fiber
Authors: Gomolka Grzegorz , Klimczak Mariusz , Pysz Dariusz , Stepniewski Grzegorz , Buczyński Ryszard , Nikodem Michal
Published: November 2021

Mid-infrared laser absorption spectroscopy of methane near 3.27 µm inside hollow-core fiber is presented. High sensitivity and selectivity are obtained by using wavelength modulation spectroscopy method and interband cascade laser as a source.
Multispecies analysis in a CH4/N2 discharge plasma using a mid-infrared supercontinuum source and an FTS
Authors: Liu N. , Krebbers R. , Abbas M. A. , Khodabakhsh A. , Nematollahi M. , Jahromi K. E. , Harren F. J. M.
Published: November 2021

A Fourier transform spectrometer (FTS), equipped with a broadband MIR supercontinuum (SC) source, is developed for analyzing CH4/N2 discharge plasma and the kinetics of plasma products (typically C2H6 and HCN) under different discharge currents.
Robot-mounted Laser Induced Breakdown Spectroscopy (LIBS) and Raman Spectroscopy for Nuclear Environments
Authors: Martin Philip A. , Coffey Paul , Smith Nicholas , Lennox Barry , West Andrew
Published: November 2021

This paper describes the development of separate LIBS and Raman instrumentation for operation on both autonomous robotic systems and also mounted on a robotic arm manipulator for materials characterization in nuclear environments.
Unlocking the Potential of Hyperspectral Imaging of Plants for Precision Agriculture and Plant Phenotyping
Authors: Mahlein Anne-Katrin , Barreto Alcántara Abel A. , Ispizua Yamati Facundo R. , Paulus Stefan
Published: November 2021

Hyperspectral sensors offer the potential to monitor plants non-invasively. Analysis of spectral signatures enable the detection of specific plant stress. This is a prerequisite for site- specific management strategies and may reduce the input of agrochemicals.
An optical method to differentiate wood from polymers using fluorescence lifetime imaging microscopy
Authors: Wohlschläger Maximilian , Holst Gerhard , Versen Martin , Laforsch Christian
Published: November 2021

In this contribution investigations with fluorescence lifetime imaging microscopy (FLIM) are made to optically distinguish polymers and wood. The results show that the distinction and identification is possible in a graphical and calculative way.
Optical isotope ratio spectroscopy – complementing isotope ratio mass spectrometry
Authors: Braden-Behrens Jelka , Meuzelaar Heleen , Mohn Joachim , Nwaboh Javis A. , Persijn Stefan , Rolle Francesca , Sega Michela , Steur Pharahilda M. , Wacker Lars , Zeyer Kerstin , Werhahn Olav , Ebert Volker
Published: November 2021

Isotope ratio measurements and scale definitions are typically related to mass specectroscopy. This work discusses the challenges of optical isotope ratio spectroscopy and its prospects to significantly complement isotope ratio mass spectrometry.
Fourier Transform Spectroscopy Using Novel Mid-infrared Supercontinuum Sources
Authors: Khodabakhsh A. , Nematollahi M. , Jahromi K. E. , Krebbers R. , Liu N. , Abbas M. A. , Huot L. , Bang O. , Harren F. J. M.
Published: November 2021

We present a Fourier Transform Spectrometer, especially developed for ultra-broadband mid-infrared supercontinuum sources and suitable for multispecies trace gas detection with noise equivalent detection limits in the order of 0.3-10 ppmv Hz-1/2 for various species.
Development of a Far-infrared Grating Spectrometer for a Post-dispersed Fourier Transform Spectrometer
Authors: Anderson Alicia , Naylor David , Huber Anthony , Gom Brad , Fulton Trevor , Gunuganti Sudhakar , Jellema Willem , Veenendaal Ian , Ade Peter
Published: November 2021

This paper discusses the development of a cryogenic grating spectrometer that has been used to evaluate the performance of a post-dispersed polarizing FTS over the range of 285-500 µm.
Optical Design of a Spatial-Spectral Fourier Transform Interferometer for the Far-infrared
Authors: Scott J. , Spencer L. D. , Benson Chris S.
Published: November 2021

A spatial-spectral Fourier transform interferometer provides enhanced spatial resolution while preserving spectral information over a broad bandwidth. We present the optical design of a laboratory based test-bed instrument for the far-infrared.
Far-Infrared Radiation Mobile Observation System for ground and balloon-borne validation of the FORUM mission
Authors: Palchetti Luca , Barucci Marco , Belotti Claudio , Bianchini Giovanni , D’Amato Francesco , Di Natale Gianluca , Montori Alessio , Pratesi Filippo , Ridolfi Marco , Viciani Silvia
Published: November 2021

For the preparation of the FORUM Earth Explorer mission, which will be launched by ESA in 2026, a mobile FTS prototype was developed to perform far-IR measurements of the atmospheric emission from ground-based sites and stratospheric bal- loons.
Validation Studies for the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)
Authors: Walker Kaley A. , Sheese Patrick E. , Zou Jiansheng
Published: November 2021

This paper will describe the current validation studies and overall mission status for the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS). The current focus is on long-term validation efforts.
HYPERedu online learning initiative for imaging spectroscopy
Authors: Foerster Saskia , Brosinsky Arlena , Kuester Theres , Wilczok Charlotte , Eckardt Robert , Bock Michael
Published: November 2021

HYPERedu provides online learning materials on principles, methods and applications of imaging spectroscopy at Masters level for students as well as professionals that will be continuously extended and complemented by an online course series.
Data Dimensionality Reduction based Geological Interpretation of AVIRIS-NG Hyperspectral Data
Authors: Tripathi Prateek , Garg Rahul Dev
Published: November 2021

This work reviews the three basic linear data dimensionality reduction techniques for an airborne hyperspectral image and their applications in feature identification
Evaluating the hyperspectral signature of marine plastics
Authors: Knaeps Els , Moshtaghi Mehrdad
Published: November 2021

A spectral database of marine plastics was used to characterize the marine plastics spectral shape in the NIR and SWIR and identify the most important wavelengths to design a dedicated sensor.
Spontaneous Emergence of Microresonator Laser Cavity- Solitons
Authors: Rowley Maxwell , Hanzard Pierre Henry , Cutrona Antonio , Chu Sai T. , Little Brent E. , Morandotti Roberto , Moss David J. , Gongora Juan Sebastian Totero , Peccianti Marco , Pasquazi Alessia
Published: November 2021

A cartographical study is conducted within the parameter space of a microresonator- filtered fiber laser. We identify a region in which solitons are spontaneously formed and maintained, and we investigate the effects which govern their emergence.
Controlled crystallisation of thermal evaporated GST-on-SOI for photonic neuromorphic application
Authors: Kallega Rakshitha , Shekhawat Roopali , K Udaya Bhat , Karuppannan Ramesh , Selvaraja Shankar Kumar
Published: November 2021

In this paper, we demonstrate controlled phase tuning of thermally evaporated germanium antimony telluride (GST) integrated silicon ring-resonator for potential neuromorphic application. We present and correlate electrical and photonic phase transition of ring integrated GST.
Multi-level Nonvolatile Photonic Memories Using Broadband Transparent Phase change materials
Authors: Meng Jiawei , Miscuglio Mario , Sorger Volker J.
Published: November 2021

Here we demonstrate a low-loss multi-state photonic memory using broadband transparent phase change materials (GeSbSe), which can be efficiently reprogrammed on-chip.
Classical High Performance Filters with Integrated Waveguide Coupled Sagnac Loop Reflectors
Authors: Arianfard Hamed , Wu Jiayang , Juodkazis Saulius , Moss David J.
Published: November 2021

We present theoretical designs for Butterworth, Bessel, Chebyshev, and elliptic filters in 3-waveguide coupled Sagnac loop reflectors in silicon nanowire resonators to achieve broad filtering bandwidths with high roll-off for these classic filters.
On-chip Integrated Magneto-Optical Nonreciprocal Photonic Devices
Authors: Yan Wei , Du Qingyang , Zhang Yan , Yang Yucong , Pintus Paolo , Qin Jun , Hu Juejun , Ross Caroline A. , Bowers John , Deng Longjiang , Bi Lei
Published: November 2021

High performance planar optical isolators and circulators with isolation ratio of 30 dB and record low insertion loss of 0.5 dB have been developed on SiN photonic integrated circuits.
Experimental Realization of Topology-Optimized InP Photonic Cavities with Extreme Dielectric Confinement
Authors: Xiong Meng , Sakanas Aurimas , Dimopoulos Evangelos , Christiansen Rasmus Ellebæk , Semenova Elizaveta , Sigmund Ole , Yu Yi , Yvind Kresten , Mørk Jesper
Published: November 2021

We experimentally realized InP topology-optimized cavities with extreme dielectric confinement, showing ultra-small mode volume and high quality-factor. Such cavities are promising for many applications, e.g. low-noise nanolasers.
High-Speed Si/Ge Avalanche Photodiodes with Enhanced Responsivity
Authors: Yuan Yuan , Huang Zhihong , Wang Binhao , Liang Di , Zeng Xiaoge , Fiorentino Marco , Beausoleil Raymond G.
Published: November 2021

Reflectors have been integrated at the end of the Si/Ge waveguide avalanche photodiodes (APDs) to enhance the responsivity without compromising the bandwidth. The responsivity is improved from ∼ 0.75 A/W to ∼ 1 A/W assisted with a distributed Bragg reflector (DBR) or a loop reflector (LR) while maintaining a high bandwidth of 25 GHz. The enhanced responsivity improves the sensitivity by 1-2 dB with 32 Gbit/s NRZ modulation.
Gallium Arsenide Photonic Integrated Circuit Platform for 1030 nm Applications
Authors: Verrinder Paul , Wang Lei , Fridlander Joseph , Sang Fengqiao , Rosborough Victoria , Nickerson Michael , Yang Guangning , Stephen Mark , Coldren Larry , Klamkin Jonathan
Published: November 2021

An active-passive integration platform on GaAs is demonstrated with Fabry Perot lasers exhibiting up to 240 mW total output power, 98.8% injection efficiency, and 3.44 cm-1 active loss for operation near 1030 nm.
High-performance lasers heterogeneously integrated on silicon nitride
Authors: Xiang Chao , Morton Paul A. , Bowers John E.
Published: November 2021

Silicon nitride has excellent properties for photonic integrated circuits, where integration of lasers makes many new devices possible. Here we show recent progress of high performance heterogeneously integrated lasers using silicon nitride waveguides.
Nonlinear Pulse Compression to Shorter Durations than the Fundamental Soliton Limitation
Authors: Zia Haider
Published: November 2021

We decrease the minimal achievable duration in soliton-effect nonlinear pulse compression by access to a new generation regime, exceeding the fundamental soliton bandwidth.This is accomplished by sign-alternating the dispersion along the propagation.
A CAD model for the Spoof Surface Plasmon Polariton Waveguides for Terahertz Integrated Circuits
Authors: Cinar Yilmaz , Yildirim Salih Serdar , Ozsahin Gulay , Unutmaz Muhammed Abdullah , Unlu Mehmet
Published: November 2021

We present a circuit model for Spoof Surface Plasmon Polariton waveguides for terahertz. The proposed model minimizes the design process enabling computer-aided-design tools as the design environment and is verified by fabrication and measurements.
Hydrogel Films Encapsulating Fully Organic Scintillating Crystalline Colloidal Arrays with Tunable Emission
Authors: Mell Sarah , Jones Haley W. , Bandera Yuriy , Foulger Stephen H.
Published: November 2021

Radioluminescent copolymer nanoparticles that self-assembled into a crystalline colloidal array due to electrostatic repulsion were encapsulated within hydrogels. The rejection wavelength of the gels was tuned through drying and swelling the system.
Neural-Network-based Design of Tunable Multilayer Films
Authors: Kim Jungmin , Yu Sunkyu , Park Namkyoo
Published: November 2021

We introduce the data-driven design of multilayers with enhanced tunability. By applying the machine-learning-designed claddings to a phase-changeable core, we obtain the deterministic realization of on-off states in the angular transmittance, achieving tunable engineered disorder.
Spatiospectral Characterization of Pulse-beams with 10 nm Resolution via Broadband Ptychography
Authors: Goldberger David , Barolak Jonathan , Durfee Charles G. , Adams Daniel E.
Published: November 2021

We demonstrate spatiospectral characterization of pulse-beams with 10 nm spectral resolution via Broadband Ptychography. Pulse illumination produced by a modelocked Ti:sapphire laser with linear spatial chirp is reconstructed with 10 nm spectral resolution.
Fourier Optic Convolutional Neural Network
Authors: Miscuglio Mario , Hu Zibo , Li Shurui , Gupta Puneet , Dalir Hamed , Sorger Volker J.
Published: November 2021

Here we report a massively-parallel Fourier-optics convolutional processor accelerated 160x over spatial-light-modulators using digital-mirror-display technology as input and kernel showing an MNIST and CIFAR-10 accuracy of 96% and 54%, respectively.
Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
Authors: Park YongKeun
Published: November 2021

We exploit quantitative phase imaging (QPI) for label-free quantitative live-cell imaging of cells and tissues, and applied machine learning algorithms to classify cell types, segment cellular or organelles boundaries, and molecular inference.
Wavefront shaping for intraocular scattering correction
Authors: Paniagua-Diaz Alba Maria , Artal Pablo
Published: November 2021

In this work we propose a non-invasive alternative to cataracts surgery by means of manipulating the wavefront of the incident light. We show a two-fold improvement in the Strehl ratio of the ocular Point Spread Function.
Non-contact, Artefact-free Corneal Imaging using Random Laser
Authors: Gayathri R. , Suchand Sandeep C. S. , Ahmad K. , Vijayan C. , Murukeshan V. M.
Published: November 2021

Non-contact, cellular-level imaging of the corneal structures of the eye is challenging. This paper in this context, proposes and demonstrates the use of random laser illumination for artefact-free imaging of corneal structures.
Drone orientation detection at a distance of 50 m using a SPAD array camera
Authors: Scholes Stirling , Ruget Alice , Martin German M. , Zhu Feng , Gyongy Istvan , Henderson Robert K. , Leach Jonathan
Published: November 2021

We present the classification of a quadcopter’s heading in flight at ranges in excess of 50 metres using a single-photon avalanche detector (SPAD) based time-of-flight system in conjunction with a convolutional neural network (CNN).
Simultaneous superficial cortex and deep brain imaging in mice brain using wide-field microscope through implanting custom-built cranial window
Authors: Zhuang Chaowei , Zhang Rujin , Xiao Guihua , Cao Jiangbei , Xie Hao , Dai Qionghai
Published: November 2021

We propose an ultra-large field-of-view (FOV) and cellular-resolution wild-field macroscope to show the simultaneous superficial cortex and deep brain imaging by implanting two different custom-built cranial windows: glass plug and microprism.
Deep learning for snapshot compressive imaging
Authors: Yuan Xin
Published: November 2021

We consider deep learning methods for snapshot compressive imaging (SCI), where a single 2D detector is used to capture the high-dimensional data-cube. This work reviews the recent advances of deep learning based inversion algorithms for SCI.
Web Based Methodology for Holographic Learning on Microscopy Patterns Recognition
Authors: da Silva Junior Andouglas Goncalves , Carcagnì Pierluigi , Memmolo Pasquale , Bianco Vittorio , Cacace Teresa , Merola Francesco , Goncalves Luiz Marcos Garcia , Distante Cosimo , Ferraro Pietro
Published: November 2021

We propose a way to perform the classification of holographic phase maps using machine learning models in a web application. The system can perform acquisition, processing, reconstruction, segmentation, and classification steps straight from the browser.
Infrared Micro-spectroscopy with Visible Light
Authors: Paterova Anna V. , Maniam Sivakumar M. , Yang Hongzhi , Grenci Gianluca , Krivitsky Leonid A.
Published: November 2021

We introduce a new approach to the infrared micro-spectroscopy based on nonlinear interferometry technique, where the chemical map of a sample in the infrared range is obtained with off-the-shelf components for visible light.
Multi-Spectral Reflectance And Shape Reconstruction Using A Concentric Light Field
Authors: Ding Yuqi , Zhou Mingyuan , Ji Yu , Yu Jingyi , Young S. Susan , Ye Jinwei
Published: November 2021

We introduce a concentric light field system that can recover the shape and multi-spectral reflectance of surfaces with diverse materials. Experimental results show that our method has robust performance in recovering non-Lambertian surfaces.
On-chip Inductive Peaking to Boost the Silicon Modulator Bandwidth
Authors: Das Ranjan , De Souvaraj , Schneider Thomas
Published: November 2021

We present a new method for increasing the bandwidth of integrated electro-optic modulators by compensating the large intrinsic junction capacitance and on-chip inductive peaking. Simulation shows a small signal bandwidth enhancement of more than 30%.
A Meta-learning-assisted Training Framework with Confidence Interval for Optical Network Modeling
Authors: Qiu Qizhi , Liu Xiaomin , Zhang Yihao , Yi Lilin , Hu Weisheng , Zhuge Qunbi
Published: November 2021

A reliable and accurate meta-learning-assisted training framework is proposed for deploying machine-learning-based applications to optical networks. The framework provides prediction confidence interval and makes better utilization of noisy data.
Filtering Impact on High-Order Modulation Formats in Hybrid Filterless and Filtered Optical Metro Networks
Authors: Sequeira D. , Ruiz M. , Napoli A. , Velasco L.
Published: November 2021

Optical filtering impact in hybrid filterless and filtered optical metro networks is investigated considering 32 and 64 QAM and up to 96 GBd signals. Resulting OSNR filtering penalties foresee its application for future optical metro networks.
Increased Power Budget from Rayleigh Backscattering Suppression by λ-shifting in UD-WDM PONs
Authors: Masanas Miquel , Santos Maria C. , Tabares Jeison , Polo Víctor , Prat Josep
Published: November 2021

We show that Rayleigh Backscattering rejections through upstream/downstream (US/DS) carrier λ-shifting result in power budget gains in low-cost single laser coherent transceivers. We measure BER of a DPSK signal with varying US/DS spectral spacing.
Time-Resolved Photoluminescence Studies of Perovskite Chalcogenides
Authors: Ye Kevin , Zhao Boyang , Diroll Benjamin , Niu Shanyuan , Ravichandran Jayakanth , Jaramillo Rafael
Published: November 2021

We use time-resolved photoluminescence to study excited-state carrier mobility and recombination rates in BaZrS3 and Ba3Zr2S7, and we refine a semiconductor physics model to the data. Both materials have favorable properties for optoelectronics.
Electro-Optical Performance of Liquid Crystal Materials Modified by Ions and Nanoparticles
Authors: Garbovskiy Y.
Published: November 2021

Nanoparticle-induced ionic processes can be used to improve electro-optics of liquid crystals. The ion trapping effect can enable a DC driving of liquid crystals while ion generation is promising for the development of smart windows.
A high temperature approach to synthesize new optical and x-ray luminescent nanomaterials for biomedical applications
Authors: Zhang Eric , Dickey Ashley , Jones Haley , Foulger Isabell , Kolis Joseph , Foulger Stephen
Published: November 2021

A high temperature reactor was developed to synthesize new scintillating nanoparticles that traditionally would sinter. Yttrium pyrosilicate nanoparticles were synthesized with optical properties suitable for x-ray biomedical applications.
Integration of CsPbBr3 Nanocrystals with Dielectric Microspheres: A Novel Metasurface for Enhanced Polarized Emission in the Green
Authors: Roini G. , Falsini N. , Vassalini I. , Galstyan V. , Ristori A. , Comini E. , Alessandri I. , Vinattieri A.
Published: November 2021

The efficient integration of CsPbBr3 nanocrystals in SiO2/TiO2 beads metasurfaces is demonstrated. Micro-PL measurements reveal light coupling due to the presence of the beads producing a significant PL polarization.
Four-wave mixing process induced by a self-phase modulated pulse in a hollow core capillary
Authors: Zurita-Miranda Olivia , Fourcade-Dutin Coralie , Béjot Pierre , Fauquet Frederic , Maillotte Hervé , Mounaix Patrick , Bigourd Damien
Published: November 2021

In this work, we investigate the modal four waves mixing (FWM) process in an argon filled capillary appearing from the spectral broadening of a pump pulse injected in the fundamental mode. The edge of the spectrum at the low wavelength part seeds the FWM process to generate and high order mode in the near infrared.
Ring core few-mode fiber with radial anisotropy for maximizing the modal density in optical vortex transmission
Authors: Sharma Manish , Vigneswaran Dhasarathan , Rusch Leslie A. , LaRochelle Sophie , Ung Bora
Published: November 2021

The radially anisotropic ring fiber design has been numerically and theoretical investigated. We show that the proposed waveguiding platform enables the stable co-propagation of vortex modes created using both the TE/TM and HE/EH basis sets.
Low-loss Nested-compound Negative Curvature Hollow-core Fiber for Mid-IR Transmission
Authors: Akosman Ahmet E. , Ordu Mustafa
Published: November 2021

A new negative curvature hollow-core fiber with a compound cladding structure is proposed. Compared to conventional nested structures, the proposed design features one order of magnitude improvement in confinement losses as low as 0.03 dB/km.
OSA Novel Optical Materials and Applications Topical Meeting (NOMA) Cephalopod-Inspired Manipulation of the Refractive Index of Human Cells
Authors: Chatterjee Atrouli , Gorodetsky Alon
Published: November 2021

Cephalopods possess unrivaled camouflage and signaling abilities that are enabled by their complex skin architecture, which contain optically active cells and organs. The optical functionality of these cells (and thus cephalopod skin) is enabled by subcellular structures, which are partially composed of a unique class of structural proteins known as reflectins. Our laboratory has pioneered the study of reflectins as biomolecular markers with intrinsic refractive index (RI) contrast [1,2]. Recently, we have demonstrated the genetic engineering of the refractive index of mammalian cells with reflectins and studied the light-manipulating capabilities of cells containing reflectin-based photonic architectures [1]. Moreover, we have reported the molecular-level structure of a model reflectin variant and discovered robust relationships between the secondary structure/assembly state and RI for this variant by leveraging holotomography [2]. Taken together, our findings may open new possibilities for quantitative phase imaging modalities and hold exciting implications for biophotonic, bioelectronic, and biomedical applications.
Dynamics and Lateral Distribution of Heating in the Quantum-Cascade Laser Cavity under Pulsed Pumping
Authors: Dudelev V.V. , Mikhailov D.A. , Cherotchenko E.D. , Chistyakov D.V. , Babichev A.V. , Mylnikov V. Yu. , Gladyshev A.G. , Losev S.N. , Novikov I.I. , Lyutetskiy A.V. , Slipchenko S.O. , Pikhtin N.A. , Karachinsky L.Ya. , Egorov A.Yu. , Sokolovskii G.S.
Published: November 2021

We study nanosecond-scale dynamics and micrometer-scale lateral heating distribution in the quantum-cascade laser cavity under short-pulsed pumping. Detection of the material heating rate at 1s mK/ns is demonstrated.
Harmonic Generation in Anisotropic ENZ: Impact of Nonlocalities and Hot Electrons
Authors: Vincenti M. A. , de Ceglia D. , Scalora M.
Published: November 2021

We analyze the impact of nonlocalities and hot electrons on second and third harmonic generation in anisotropic epsilon-near-zero nanostructures. Our results reveal that these contributions significantly modify both linear and nonlinear response.
Recover speed loss in wide-field, optical-sectioning imaging by interleaved reconstruction
Authors: Shi Ruheng , Li Yuting , Kong Lingjie
Published: November 2021

We propose an interleaved reconstruction method for recovering speed loss in structured illumination microscopy, leading to 3 times faster, and demonstrate its superiority byin vivoimaging of neural network dynamics in zebrafishlarva.
Fluorescence Laser-Scanning Microscopy with SPAD Array Detector: Towards Single-Photon Microscopy
Authors: Vicidomini Giuseppe
Published: November 2021

By temporally and spatially tagging the fluorescence photons from the detection volume of a laser-scanning microscope, it gives access to new sample information and improves the system’s spatiotemporal resolution/range.
Explainable Neural Network Cancer Diagnosis of Unstained Tissue Samples Measured by Chemometric Microscope
Authors: Yin Zhuo , Xu Min
Published: November 2021

We present an interpretable neural network cancer diagnosis of unstained lung tissue sections measured by chemometric fluorescence microscope. It demonstrates high accuracy and identifies a novel pairwise chromophore interaction for diagnosis.
Dual-view oblique plane microscopy
Authors: Sparks Hugh , Almagro Jorge , Behrens Axel , Salbreux Guillaume , Dunsby Chris
Published: November 2021

Dual-view Oblique Plane Microscopy (dOPM) enables single-objective multi-view light-sheet fluorescence microscopy. This talk introduces the dOPM concept and demonstrates optical resolution performance with exemplar 3D datasets of fluorescence bead samples and fixed multicellular spheroids.
Simulating Angular Light Scattering of Non-Nuclear Organelles from Single Cells
Authors: Dunn Kaitlin J. , Berger Andrew J.
Published: November 2021

We present simulated angular scattering from organelle populations of arbitrary size distribution and spatial location. Simulations will be used to explore the limitations of extracting size information from single cells, motivated by experiments.
Deep-learning-based image reconstruction for compressed ultrafast photography
Authors: Ma Yayao , Feng Xiaohua , Gao Liang
Published: November 2021

We demonstrated a deep-learning-based method for compressed ultrafast photography (CUP) reconstruction that substantially improves the image quality and reconstruction speed.
Probing the sub-micrometer scale polarity distribution of out-of-plane collagen fibrils in biological tissues by circular-dichroism SHG microscopy
Authors: Schmeltz Margaux , Teulon Claire , Pinsard Maxime , Hansen Uwe , Alnawaiseh Maged , Ghoubay Djida , Borderie Vincent , Mosser Gervaise , Aimé Carole , Légaré François , Latour Gaël , Schanne-Klein Marie-Claire
Published: November 2021

Experiments on human corneas and theoretical analysis of the chiral SHG response including magnetic contributions show that circular-dichroism SHG microscopy specifically reveals assemblies of out-of-plane collagen fibrils and probes their sub-micrometer polarity distribution.
Sculpting light in 3D with Dynamic Computer Generated Holography
Authors: Curtis Vincent R. , Caira Nicholas W. , Xu Jiayi , Sata Asha Gowda , Pégard Nicolas C.
Published: November 2021

We have developed a new 3D computer generated holography technique that optimizes the modulation of coherent waves in both space and time to improve the quality of rendered images. Results show enhanced fidelity and lower speckle.
High space-bandwidth product phase imaging using VHQPI numerical add-on
Authors: Cywińska Maria , Patorski Krzysztof , Trusiak Maciej
Published: November 2021

The numerical capabilities of the algorithmic solution called Variational Hilbert Quantitative Phase Imaging, aiding high space-bandwidth product quantitative phase microscopy, were studied in the case of low carrier frequency interferogram analysis (quasi-on axis configuration).
Flexible Organic Photodetector for Real-time Underwater Optical Wireless Video Transmission
Authors: Wang Zhaoming , Lou Zirui , Xu Xiaomin , Wei Zixian , Wei Guodan , Fu H. Y.
Published: November 2021

A real-time UOWC based on flexible organic photodetectors and commercial blue LED is experimentally demonstrated. By using 4QAM scheme, the system achieves 14.65 Mbps real-time video transmission with single organic photodetector deep in water of over 1 m.
Field Trial of Vibration Detection and Localization using Coherent Telecom Transponders over 380-km Link
Authors: Wellbrock G. A. , Xia T. J. , Ip E. , Huang Y.-K. , Huang M.-F. , Wang T. , Aono Y.
Published: November 2021

We demonstrate vibration detection and localization based on extracting optical phase from the DSP elements of a coherent receiver in bidirectional WDM transmission of 200-Gb/s DP-16QAM over 380 km of installed field fiber.
>25 Gbit/s LiFi with Laser Based SMD White Light Source
Authors: Raring James , Lee Changmin , Islim Mohamed Sufyan , Sparks Adrian , Videv Stefan , McLaurin Melvin , Shah Binith , Rudy Paul , Haas Harald
Published: November 2021

We demonstrate a high-speed LiFi (Light Fidelity) communication system deploying ultra-high brightness laser-based white light illumination sources in a surface mount device (SMD) package platform. The multi functionality sources provide 1000 lm of white light output with a brightness of 1000 cd/mm2 and data transmission rates beyond 20 Gbit/s from dual blue laser integrated SMD, and 500 lm of white light output with a brightness of 1000 cd/mm2 and data transmission rates beyond 25 Gbit/s from dual color of blue and infrared (IR) laser integrated SMD.
Polymer Waveguide-coupled Co-packaged Silicon Photonics-die Embedded Package Substrate
Authors: Amano T. , Noriki A. , Tamai I. , Ibusuki Y. , Ukita A. , Suda S. , Kurosu T. , Takemura K. , Aoki T. , Shimura D. , Onawa Y. , Yaegashi H.
Published: November 2021

We propose a next generation co-packaged substrate using Si photonics dies, a polymer optical waveguide, and a optical connector to achieve beyond 10 Tb/s and WDM optical links. The two micro-mirrors and polymer waveguides were integrated, and their optical characteristics were evaluated.
Dual-fiber pulse-echo ultrasound imaging
Authors: Liang Yizhi , Jin Long , Guan Bai-Ou
Published: November 2021

We report on a dual-fiber ultrasound probe for pulse-echo imaging. For ultrasound generation, a fiber is coated with a highly absorptive overlay made of carbon nanotube composite at its distal end. Ultrasound waves with a peak-to-peak amplitude of over 2.5 MPa can be photothermally generated by injecting nanosecond laser pulses. The scattered ultrasound waves at the specimen are detected by a paired fiber-laser-based ultrasound sensor, by translating the pressure waves into the variation of lasing frequencies. The probe has a diameter of 2.5 mm and an ultrasound spectrum centered at 22 MHz, and 90% -6 dB bandwidth. Ex vivo ultrasound imaging of a biological tissue has been performed with axial and lateral resolutions at 150 and 62 μm, respectively, by linearly scanning the probe, detecting the scattered waves and then forming an image via back projection. The all-fiber ultrasound probe offers an alternative approach towards next-generation intravascular and gastroenterological endoscopes.
Nanomaterial-Modified Fiber Laser Biosensor for Highly Sensitive Enzyme Detection
Authors: Mao Jiangui , Yang Xi , Liu Yiling , Gong Yuan , Rao Yun-Jiang
Published: November 2021

A fiber microlaser biosensor based on SiO2 nanosphere functionalized thin-walled hollow optical fibers is developed for sensitive detection of enzyme horseradish peroxidase.
Cascaded Intrinsic Fabry-Perot Interferometer Fiber Sensor Coated with Pd Alloy for Hydrogen Sensing
Authors: Wu Jingyu , Cao Rongtao , Wang Mohan , Yang Yang , Ohodnicki Paul , Chen Kevin P.
Published: November 2021

A cascaded hydrogen sensors based on intrinsic Fabry-Perot interferometer (IFPI) fabricated by femtosecond laser in single mode fibers is presented for monitoring the hydrogen gas at the room temperature. A detection limit of hydrogen of 0.25 % is achieved.
On the Importance of Spatial Resolution in Distributed Sensing
Authors: Ravet Fabien , Goy Alexandre , Rochat Etienne
Published: November 2021

Spatial resolution is too often undermined in comparison to sensor range or measurement resolution. Its definition is reviewed, and, its verification is presented. The consequences of neglecting it is reviewed in practical cases.
Long-Distance BOTDR Interrogator with Polarization- Diverse Coherent Detection and Power Evaluation
Authors: Jostmeier Thorben , Marx Benjamin , Buntebarth Christian , Rath Alexander , Hill Wieland
Published: November 2021

A novel BOTDR interrogator for long-distance temperature and strain monitoring has been developed and characterized for its measurement performance. It is suited for distributed sensing at distances up to 100 km and allows separating temperature and strain effects based on the simultaneous evaluation of Brillouin power and frequency.
Hybrid CDM-WDM Scheme for Interrogating 2×2000 Serial FBG Sensors
Authors: Götten Marek , Lochmann Steffen , Ahrens Andreas , Van Roosbroeck Jan , Vlekken Johan , Vöigtlander Christian , Lindner Eric , Van Hoe Bram , Benavente-Peces César
Published: November 2021

This contribution demonstrates a massive hybrid code-division multiplexing (CDM)-wavelength-division multiplexing (WDM) scheme that interrogates 2×2000 serial fiber-Bragg gratings (FBGs). The overlapping FBG spectra lead to maximum deviation errors of only 8 pm at a reflectance of 1 %.