A5052343414- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Electrowetting and Microfluidic Technologies
- Analytical Chemistry and Sensors
- Mechanical and Optical Resonators
- Microfluidic and Capillary Electrophoresis Applications
- Advanced MEMS and NEMS Technologies
- Water Quality Monitoring and Analysis
- Spectroscopy and Laser Applications
- Structural Health Monitoring Techniques
- Geophysical Methods and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Ultrasonics and Acoustic Wave Propagation
- Photonic Crystals and Applications
- Microfluidic and Bio-sensing Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Biosensing Techniques and Applications
- Advanced biosensing and bioanalysis techniques
- Water Quality Monitoring Technologies
- Biosensors and Analytical Detection
- Acoustic Wave Resonator Technologies
- Silicon and Solar Cell Technologies
- Microwave Imaging and Scattering Analysis
Istituto per il Rilevamento Elettromagnetico dell'Ambiente
2015-2024
National Research Council
2013-2024
Research Institute for Electromagnetic Materials
2022
Treatment Action Group
2018
Naples Anesthesia & Physician Associates
2015-2017
National Academies of Sciences, Engineering, and Medicine
2004-2015
Institute for the Dynamics of Environmental Processes
2013
University of Campania "Luigi Vanvitelli"
1999-2002
Iren Acqua Gas (Italy)
2002
University of Naples Federico II
1995-2000
In this work, the numerical and experimental analysis on use of thinned fiber Bragg gratings as refractive index sensors have been carried out. Wet chemical etching in a buffered hydrofluoric acid solution was used for sensor fabrication. Experimental characterization an almost full etched cladding is presented demonstrating good agreement with results resolutions /spl ap/10/sup -5/ -4/ outer around 1.45 1.333, respectively.
We present a technique for dynamic strain measurements in optical fibers based on the stimulated Brillouin scattering interaction between two counterpropagating pulses. The allows high sampling rate and permits to addressing dynamically randomly position at which vibration is measured. Preliminary experimental results carried out with perturbation frequency up 98 Hz demonstrate validity of proposed technique.
In this paper, we demonstrate high spatial (≈3 cm) and spectral (≈30 MHz) resolution Brillouin sensing by use of optical frequency-domain analysis (BOFDA) signal processing. An iterative method is employed to correct the acquired data from spurious effects associated acoustic wave modulation relevant in regime. Experimental tests that proposed algorithm allows reconstruct shift profile with full allowed system bandwidth.
We demonstrate a Brillouin optical frequency-domain reflectometry (BOFDR) technique, which can measure the strain and/or temperature along an fiber with one-end access, by detecting spontaneous scattering from sinusoidally modulated pump light. Compared to analysis (BOFDA), we show that BOFDR measurements are free distorting components related acoustic wave modulation, thus simplifying data processing.
In the last years, fiber optic sensors have been widely exploited for several sensing applications, including static and dynamic strain measurements up to acoustic detection. Among these, Bragg grating indicated as ideal candidate practical structural health monitoring in light of their unique advantages over conventional devices. Although this class has successfully tested low-frequency measurements, identification sensor performances high-frequency detection, emission ultrasonic...
In this paper, the inverse scattering problem for dielectric objects in a two-dimensional half-space geometry is dealt with. The discussion worked out framework of linear model Born Approximation (BA) and role measurement configuration investigated with regard to information content scattered field data. particular, configurations analyzed are multiview-multistatic, multibistatic multistatic single view, all exploiting frequency diversity observation line at interface. comparison shows that...
Distributed temperature measurements in a perfluorinated graded-index polymer optical fiber (POF) with 50- μm core diameter are reported for the first time, to best of our knowledge. Brillouin frequency-domain analysis is shown be able resolve spatially temperature-dependent frequency shift profile along 20-m POF sample, at nominal spatial resolution 4 m. The results indicate that POFs potentially useful distributed based on stimulated scattering.
Optofluidics, nominally the research area where optics and fluidics merge, is a relatively new field it only in last decade that there has been large increase number of optofluidicapplications, as well groups, devoted to topic.Nowadays optofluidics applications include, without being limited to, lab-on-a-chip devices, fluid-based controlled lenses, optical sensors for fluids suspended particles, biosensors, imaging tools, etc.The long list potential applications, which have recently...
A simple integrated optical refractometric sensor based on hollow-core antiresonant reflecting waveguides is proposed. The uses the guidance mechanism and permits one to measure refractive index of a liquid filling core by simply monitoring transmitted spectrum. device has been made with standard silicon technology, experimental results confirm numerical simulations performed in one- two-dimensional geometry. exhibits linear response over wide measurement range (1.3330–1.4450) resolution...
We present a technical solution, capable of alleviating the problem pump depletion in long-range Brillouin distributed fiber sensor. This solution takes advantage presence two sidebands probe wave to generate dual gain-loss interaction, giving rise reduced depletion. Experimental results, carried out by using optical frequency-domain analysis configuration, demonstrated improvement offered technique.
Abstract The mechanics of rainfall-induced flowslides in pyroclastic soils have yet to be completely clarified. complexity phenomena (rainfall-induced failure initially unsaturated granular deposits, post-failure transition flow-like landslide) requires the use a well-equipped small-scale flume. To this aim, flume experiments at Second University Naples were performed analyze fundamental aspects such phenomena. A new experimental program is now being carried out assess performance time...
We report the results of a static load test performed on road-bridge with span length 44.40 m. The tests were by portable prototype instrument exploiting stimulated Brillouin scattering in optical fibers for deformation and temperature measurements. fiber sensor was able to provide strain distribution along supporting beam bridge spatial resolution 3 meters ±15 με. Comparison fiber-optic measurements finite-elements-method (FEM) simulations, as well data collected vibrating wire gauges,...
The application of a Brillouin distributed sensor for the monitoring railway traffic is presented in this work. field test performed on Italian regional line San Severo-Peschici, operated by Ferrovie del Gargano. A single-mode optical fiber was attached along rail length about 60 m. strain associated with train passage acquired monitored at 31 Hz acquisition rate and 1 m spatial resolution. data demonstrates its capability retrieving useful information monitoring, such as identification,...
Optofluidics is an interdisciplinary domain merging optics and microfluidics has driven significant progress in the development of small-scale, high-performance optical biosensors, aiming at final concept lab-on-chip. The successful these outcomes requires overcoming challenges related to effective integration optics, microfluidics, biorecognition elements a micron-scale level. opportunities offered by optofluidics, including efficient liquid handling strong light-matter interaction, have...
In this work we describe the fabrication and characterization of perfluorinated plastic-cladded optical fiber tapers. The heat-and-pull procedure has been used to fabricate symmetric Devices with different taper ratio have produced repeatability process verified. very low refractive indexes core-cladding polymers (n = 1.35-1.34) permit a strong enhancement evanescent wave power fraction in aqueous environments 1.33), making them attractive for sensing. tapers characterized carrying out field...
A hybrid silicon-poly(dimethysiloxane) (PDMS) optofluidic platform for lab-on-a-chip applications is proposed. liquid-core waveguide with a self-aligned solid-core and microfluidic device are integrated multilayer approach, resulting in three-dimensional assembly. The layer was fabricated silicon-polymer technology, whereas the soft lithography technique. combination of different materials fabrication processes allows modular enabling both benefits from high optical quality achievable...
The experimental validation of a numerical technique for temperature/strain profile reconstruction based on Brillouin optical-fibre time-domain analysis (BOTDA) sensors is presented. In this approach, we search directly the frequency shift along fibre that matches measured data. algorithm harmonic expansion unknown profile, whose coefficients are determined by means multidimensional minimization. Experimental measurements have been carried out in order to reveal influence nonlocalities...
Stimulated Brillouin scattering (SBS) has been recently shown to offer a mechanism for generating tunable all-optical delays in room-temperature single-mode optical fibers at telecommunication wavelengths. This technique makes use of the rapid variation refractive index that occurs vicinity gain resonance. When slow light pulse delay is subject constraint on allowable distortion, it pair closely-spaced lines can increase distortion-constrained delay, with respect single-line configuration....
The single-wall carbon nanotubes (SWCNTs) are one of the new materials ofemerging technologies. They becoming increasingly studied for possibleapplications in electronics, optics and biology. In particular, very promising fields ofapplication development optical biosensors intracellular drug delivery.Nevertheless, there is a paucity information on their toxicological properties onpotential human health risk. present study SWCNTs were investigated thepossible induction toxicity blood cells....
The ISTIMES project, funded by the European Commission in frame of a joint Call “ICT and Security” Seventh Framework Programme, is presented preliminary research results are discussed. main objective project to design, assess promote an Information Communication Technologies (ICT)-based system, exploiting distributed local sensors, for non-destructive electromagnetic monitoring critical transport infrastructures. integration technologies with new ICT information telecommunications systems...