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77 results for “Optical fiber”
Fiber-optic seismic sensing of vadose zone soil moisture dynamics data sets
<p>CC_daily.h5: Daily cross-correlation functions for common-offset DAS channels.</p> <p>RCC_dv_v_full.csv: Summary of all the measured dv/v from the ballistic surface waves in daily cross-correlation functions.</p>
Dataset of numerical model for enhancing stimulated Brillouin scattering in optical fibers
<p>Stimulated Brillouin scattering (SBS) is useful, among others for generating slow light, sensing and amplification. SBS was previously viewed as a penalty due to the limitation on optical power in high-powered photonic applications. However, considering the many possible applications using SBS, it is now of interest to enhance SBS in areas of Brillouin frequency shift together with Brillouin Gain. A numerical model, using a fully vectorial approach, by employing the finite element method, was developed to investigate methods for enhancing SBS in optical fiber. This paper describes the method related to the numerical model and discusses the analysis between the interactions of horizontal, shear and hybrid acoustic modes; and optical modes in optical fiber. Two case studies were used to demonstrate this. Based on this numerical model, we report the influence of core radius, clad radius and effective refractive index on the Brillouin frequency shift and gain. We observe the difference of Brillouin shift frequency between a normal silica optical fiber and that of a tapered fiber where nonlinearities are higher. Also observed, the different core radii used and their respective Brillouin shift. For future work, the COMSOL model can also be used for the following areas of research, including simulating "surface Brillouin shift" and also to provide in-sights to the Brillouin shift frequency v<sub>B</sub><span><span></span></span> of various structures of waveguides, e.g circular, and triangular, and also to examine specialty fibers, e.g. Thulium and Chalcogenide doped fibers, and their effects on Brillouin shift frequency.</p>
Artificial Neural Network Symbol Demapper for Coherent Optical Fiber Systems
<p>M-files and datasets that implement an artificial neural network (ANN) demapper targeted to the compensation of fiber nonlinearities in coherent optical transmission systems. </p> <p>The dataset contains simulation data of a 11-channel WDM fiber link with numerical propagation implemented by the split-step Fourier method over standard single-mode fiber with 100 km per span and inline optical amplification with 5 dB noise figure. The launched optical power is varied in the range of 0 to 5 dBm and the distance is swept up to 30 fiber spans. The transmitted signal is a root-raised cosine single-carrier 16QAM at 64 Gbaud. </p>
Data for "Advanced Structural Health Monitoring Method by Integrated Isogeometric Analysis and Distributed Fiber Optic Sensing"
<p>This dataset includes the experiment and simulation data of a new structural health monitoring system using distributed fiber optic sensing (DFOS) and Isogeometric Analysis (IGA).</p> <p>The experiment setup was a 5mm thick PVC pipe with a fiber optic cable wrapped around the outer surface of the pipe. The PVC pipe was subjected to an applied deformation and the distributed strains along the optical fiber was measured with a Neubrescope (NBX7031) instrument using Rayleigh backscattering technology.</p> <p>The simulation was performed using the in-house code JWRIAN-IGA developed in Joining and Welding Research Institute, Osaka University. The simulated data includes deformation, stress and strain distributions of the pipe, and projected one-dimensional fiber strains. The visualization files are post-processed with ParaView software.</p>
Miniature optical fiber curvature sensor via integration with GaN optoelectronics
<p>Raw data of publication "<strong>Miniature optical fiber curvature sensor via integration with GaN optoelectronics</strong>"</p>
DATASET: Water Phantom Characterization of a Novel Optical Fiber Sensor for LDR Brachytherapy
<p>Dataset for the journal article "Water Phantom Characterization of a Novel Optical Fiber Sensor for LDR Brachytherapy"</p>
High-speed TIRF and 2D super-resolution structured illumination microscopy with large field of view based on fiber optic components
<p>Super-resolved structured illumination microscopy (SR-SIM) is among the most flexible, fast, and least perturbing fluorescence microscopy techniques capable of surpassing the optical diffraction limit. Current custom-built instruments are easily able to deliver two-fold resolution enhancement at video-rate frame rates, but the cost of the instruments is still relatively high, and the physical size of the instruments based on the implementation of their optics is still rather large. Here, we present our latest results towards realizing a new generation of compact, cost-efficient, and high-speed SR-SIM instruments. Tight integration of the fiber-based structured illumination microscope capable of multi-color 2D- and TIRF-SIM imaging, allows us to demonstrate SR-SIM with a field of view of up to 150 × 150 μm<sup>2</sup> and imaging rates of up to 44 Hz while maintaining highest spatiotemporal resolution of less than 100 nm. We discuss the overall integration of optics, electronics, and software that allowed us to achieve this, and then present the fiberSIM imaging capabilities by visualizing the intracellular structure of rat liver sinusoidal endothelial cells, in particular by resolving the structure of their trans-cellular nanopores called fenestrations.</p>
Data for the publication: "Development and In-Vivo Validation of a Portable Phosphorescence Lifetime-Based Fiber-Optic Oxygen Sensor"
<p>This data set contains all raw data for the publication “Development and In-Vivo Validation of a Portable Phosphorescence Lifetime-Based Fiber-Optic Oxygen Sensor”:</p> <p>- Raw sensor data</p> <p>- Python scripts</p> <p>- particle photon scripts</p> <p>- CAD Drawings</p> <p>- PCB Designs</p>
Dataset of numerical model for enhancing stimulated Brillouin scattering in optical fibers
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Matlab applications for: A mechanical model to interpret distributed fiber optic strain measurement at displacement discontinuities
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Stimulated Raman photothermal spectroscopy for gas sensing in a hollow-core optical fiber
<p>This folder supplies the raw data and the plot data for the Figs. of 'Stimulated Raman photothermal spectroscopy for gas sensing in a hollow-core optical fiber' by Hanyu Liao, Yan Zhao, etc.</p>
In vivo evaluation of thermally drawn biodegradable optical fibers as brain implants
<p><strong>Dataset for Thermal, Molecular, and Optical Characterization of PDLLA Optical Fibers</strong></p> <p><span>Parinaz Abdollahian<sup>a,b</sup>,<sup> </sup>Kunyang Sui<sup>a,b</sup>, Guanghui Li<sup>b</sup>, Jiachen Wang<sup>a</sup>, Cuiling Zhang<sup>a</sup>, Yazhou Wang<sup>a</sup>, Rune W. Berg<sup>b</sup>, Marcello Meneghetti<sup>a,b</sup>, and Christos Markos<sup>*a</sup></span></p> <p><span><span>a. Department of Photonics and Electronic Engineering, Denmark Technical University, Denmark</span></span></p> <p><span><span>b. Department of Neuroscience, Copenhagen University, Copenhagen, Denmark</span></span></p> <p><strong>Description</strong>:<br>This dataset includes the experimental data and characterization results for amorphous poly(D,L-lactic acid) (PDLLA) optical fibers used in the study titled "In vivo evaluation of thermally drawn biodegradable optical fibers as brain implants." The dataset comprises the following key measurements:</p> <ol> <li><strong>Differential Scanning Calorimetry (DSC)</strong>: <ul> <li>Thermograms of PDLLA granules as purchased and after quenching, used to analyze thermal transitions.</li> </ul> </li> <li><strong>Gel Permeation Chromatography (GPC)</strong>: <ul> <li>Molecular weight data of PDLLA before and after in vivo degradation.</li> </ul> </li> <li><strong>Optical Transmission</strong>: <ul> <li>Spectral data for PDLLA fibers of different diameters (150 µm, 250 µm, and 320 µm) and their transmission properties before and after in vitro degradation in phosphate-buffered saline (PBS).</li> </ul> </li> </ol> <p><strong>Purpose</strong>:<br>The data support the evaluation of the thermal stability, molecular degradation, and optical performance of PDLLA fibers under in vitro and in vivo conditions. The goal is to assess their suitability as biodegradable neural interfaces for biomedical applications.</p> <p><strong>Methods</strong>:</p> <ul> <li>DSC was performed on a Q 2000 instrument with a temperature range of -10°C to 200°C at a heating rate of 10°C/min and a cooling rate of 50°C/min.</li> <li>GPC was conducted using a TOSOH HLC-8320 to measure molecular weight distributions.</li> <li>Optical transmission was characterized using a broadband supercontinuum source (NKT SuperK Extreme) and an ANDO AQ-6315A optical spectrum analyzer.</li> </ul> <p><strong>File Contents</strong>:</p> <ul> <li>DSC raw and processed data for granules and quenched PDLLA.</li> <li>GPC chromatograms and molecular weight calculations.</li> <li>Transmission spectra for PDLLA fibers, including pre- and post-degradation measurements.</li> </ul>
Quasi-distributed fiber optic monitoring of thermo-hydro behavior of frozen loess for frost heave prediction
<p>We developed a quasi-distributed fiber optic monitoring technology to investigate the thermo-hydro-mechanical (THM) behaviors of frozen loess. A combined method was proposed to measure in-situ ice content, providing critical parameters for understanding THM coupled effects. To characterize the soil freezing-thawing process, we further carried out subsurface automated multiphysics monitoring at a site located on the Loess Plateau, China, during 2020/2021 winter by employing quasi-distributed fiber optic sensing arrays. The inner mechanism of frost heave was revealed via field monitoring data and correlation analysis, which directly promoted the development of a semiempirical frost heave prediction method. For this study area, the proposed method requiring only temperature data as inputs was validated using our field monitoring results.</p> <p>The data presented here are the monitoring data of in-situ temperature, moisture content, and soil displacement. The results of frost heave prediction based on the field monitoring data are shown in the files.</p>
Subsurface Multi-Physical Monitoring of a Reservoir Landslide with the Fiber-Optic Nerve System
<p>All data used in the study to support this research is available on repository via 10.5281/zenodo.6541529</p>
Distributed fiber optics measurements of rock deformation and failure in triaxial tests
<p>We have uploaded two versions of the data. The first version is the raw data from the optical interrogator in the original format. The second version is the processed data. In addition, we have included in each sub-folder a "Readme.txt" file that gives the additional information, requested by the reviewer, on how to process the raw data.</p>
Field investigation of unsaturated seepage process and its influence on soil behavior for land creation in Loess plateau with fiber-optic technology
Open the record for dataset details and reuse information.
Challenges in submarine fiber-optic earthquake monitoring
<p>This dataset contains three subsets of data from a Distributed Acoustic Sensing (DAS) experiment near Santorini, Greece. The file named microseisms* contains 10 minutes of data during a period of strong microseismic activity. The two files named earthquake* contain the data for two seismic events underneath the Kolumbo volcanic chain. </p>
Dataset used in "Urban Seismic Site Characterization by Fiber-Optic Seismology" by Spica et al. in Journal of Geophysical Research: Solid Earth
<p>Spica et al. (2019, Journal of Geophysical Research: Solid Earth). This repository contains continuous waveforms from DAS for one day and for the stations mentioned in the article (Fig. 8).</p> <p>Files: all traces in miniseed format. Traces stats in the headers and in the article.</p>
5Fr Bipolar Electrode vs. Conical Optical 5Fr Fibers for Dual Wave-length Diode Laser for Hysteroscopic Polypectomy
ClinicalTrials.gov study NCT06526962. IPD Sharing: UNDECIDED. Countries: 1. Publications: 15.
High-Resolution Optical Coherence Tomography for Detection of Retinal Nerve Fiber Layer Loss in Band Atrophy of the Optic Nerve
ClinicalTrials.gov study NCT00607100. IPD Sharing: Not stated. Countries: 1. Publications: 1.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.