A5080256846- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Analytical Chemistry and Sensors
- Semiconductor Lasers and Optical Devices
- Advanced Battery Technologies Research
- Advanced MEMS and NEMS Technologies
- Radiomics and Machine Learning in Medical Imaging
- Advancements in Battery Materials
- Mechanical and Optical Resonators
- Medical Imaging Techniques and Applications
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Advanced Chemical Sensor Technologies
- Advanced Measurement and Metrology Techniques
- Gas Sensing Nanomaterials and Sensors
- Optical Network Technologies
- Spatial Cognition and Navigation
- Advanced X-ray and CT Imaging
- Copper-based nanomaterials and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Spectroscopy and Laser Applications
- AI in cancer detection
University of Aveiro
2012-2025
University of Liège
2021-2022
Leibniz Institute of Photonic Technology
2019-2021
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2011-2019
Universidade do Porto
2012-2018
INESC TEC
2014-2016
Institute for Systems Engineering and Computers
2014
Faculdade de Tecnologia de São Paulo
2012
São Paulo State Technological College
2012
Universidade Estadual Paulista (Unesp)
2012
The optical Vernier effect magnifies the sensing capabilities of an interferometer, allowing for unprecedented sensitivities and resolutions to be achieved. Just like a caliper uses two different scales achieve higher resolution measurements, is based on overlap in responses interferometers with slightly detuned interference signals. Here, we present novel approach detail, which introduces harmonics through Fabry-Perot interferometers, where can have very frequencies interferometric pattern....
This work shows a comparative study between the thermocouples and fiber sensors response for monitoring of temperature variations occurring in three different locations lithium battery. The battery is submitted to constant current charge discharge rates, under normal abusive operating conditions. For this specific application, results show that Bragg grating have better resolution rise time 28.2% lower than K‐type thermocouples, making them choice real surface as well useful tool failure...
A Fabry-Perot (FP) cavity of simple design and based on a pure silica diaphragm-free hollow tube is proposed. Its operation first reflection light at the end single-mode fiber that illuminates rod in second takes place rod. The FP characterized for high temperature, pressure refractive index sensing, showing useful characteristics measurement these three parameters. configuration simplifies fluids.
To test the performances of native and tumour to liver ratio (TLR) radiomic features extracted from pre-treatment 2-[18F] fluoro-2-deoxy-D-glucose ([18F]FDG) PET/CT combined with machine learning (ML) for predicting cancer recurrence in patients locally advanced cervical (LACC). One hundred fifty-eight LACC multiple centers were retrospectively included study. Tumours segmented using Fuzzy Local Adaptive Bayesian (FLAB) algorithm. Radiomic tumours regions drawn over normal liver. Cox...
A high sensitivity Fabry-Pérot (FP) strain sensor based on hollow-core ring photonic crystal fiber was investigated. low-finesse FP cavity fabricated by splicing a section of between two standard single mode fibers. The geometry presents low cross area silica enabling to achieve sensitivity. Strain measurements were performed considering the length in range 1000 μm. total gauge at which applied also studied for 900 mm. variation highly influenced sensitivity, and 13 μm 15.4 pm/με attained....
Sarcoidosis and lymphoma often share common features on <sup>18</sup>F-FDG PET/CT, such as intense hypermetabolic lesions of lymph nodes multiple organs. We aimed at developing validating radiomics signatures to differentiate sarcoidosis from Hodgkin (HL) diffuse large B-cell (DLBCL) lymphoma. <b>Methods:</b> retrospectively collected 420 patients (169 sarcoidosis, 140 HL 111 DLBCL) who underwent a pretreatment PET/CT the University Hospital Liege. The studies were randomly distributed 4...
Stability tests on silica optical fiber sensors (fiber Bragg gratings) within the LiB electrolyte were conducted, revealing their robustness over 24 months, only subject to variations in ambient temperature. Recurrent chemical analyses based scanning electron microscopy and energy‐dispersive X‐ray spectroscopy characterizations demonstrated formation of deposits (LiPF6 crystals) from decomposition surfaces time. However, no material degradation was observed. The performance accuracy tested...
2-Propanol in the gaseous phase of clinical samples can serve as a biomarker for disease diagnosis. In this context, novel fiber-optic Fabry–Perot (FP) interferometric sensor with microtip structure was developed using light-guided induced polymerization technique. The optical fiber (OFS) best performance, measuring approximately 15 µm length, exhibited good sensitivity to 2-propanol, response −71.1 ± 2.1 pm/ppm. Additionally, it demonstrated stability, maximum standard deviation 0.15 nm and...
A reflective fiber optic sensor based on multimode interference for the measurement of refractive index variations in glucose aqueous solutions is proposed. The fabricated by splicing a short section coreless silica to standard single mode fiber. influence dimensions performance analyzed. By changing length, no significant impact observed. However, reduction sensing head diameter leads large improvement sensitivity. smaller sensor, with length 5 mm and 24 μm, presents maximum sensitivity...
A curvature sensor based on an Fabry-Perot (FP) interferometer was proposed. capillary silica tube fusion spliced between two single mode fibers, producing FP cavity. Two sensors with different cavity lengths were developed and subjected to temperature. The longer showed three distinct operating regions for the measurement. Namely, a linear response shown intermediate radius range, presenting maximum sensitivity of 68.52 pm/m-1. When temperature, sensing head produced similar radii, varying...
In this paper, a network of 37 fiber Bragg grating (FBG) sensors is proposed for real-time, in situ, and operando multipoint monitoring the surface temperature distribution on pack three prismatic lithium polymer batteries (LiPBs). Using network, spatial temporal thermal mapping all interfaces was performed. each interface, nine strategic locations were monitored by considering three-by-three matrix, corresponding to LiPBs top, middle bottom zones. The subjected charge discharge cycles,...
In this work, a Fabry-Perot cavity based on new silica tube design is proposed. The presents cladding with thickness of ~14 μm and hollow core. presence four small rods, ~20 diameter each, placed in diametrically opposite positions ensure the mechanical stability tube. cavity, formed by splicing section between two sections single mode fiber, characterized strain temperature (from room to 900 °C). When sensor exposed high temperatures, there change response strain. influence thermal...
Thermal and pressure stability of Li-ion batteries (LiB) are the most important parameters for safety. In abuse operating conditions, rapid increase temperature can cause appearance hot-spots, which may lead to an increasing degradation rate or even battery’s explosion and/or combustion. A sensing network fiber Bragg gratings is attached surface a prismatic LiB monitor its bi-directional strain variations through normal charge (0.70 C) two different discharge rates (1.32 C 5.77 in x-...
A fiber sensor based on a Fabry-Perot cavity is reported for measuring mixtures of water and glycerin. The fabricated by producing an air bubble near the end face multimode section, reshaping tip in order to produce thin silica diaphragm. It observed that there dependence between diaphragm dimensions structure sensitivity. with 20 μm thick presents sensitivity 7.81 pm/wt.% regarding variation mass fraction With this sensing head, experimental resolution 2.5 wt.% estimated. By converting into...
The hollow core photonic crystal fibers have attracted a significant interest due to their abilities not only in managing the optical properties, but also guide light with low loss. In this work, square fiber (HSCF), whose guidance is based on antiresonance (AR), implemented as an sensor simultaneously measure strain, curvature, and temperature. was designed transmission layout where HSCF spliced between two single mode (SMF), enabling appearance of interferometers, Mach-Zehnder...
A suspended multicore fiber sensor for simultaneous measurement of curvature and strain is proposed. The spectral response shows evidences several interferences arising from the seven cores fiber. Once sensing head presents different sensitivities measurements, these physical parameters can be discriminated by using matrix method. rms deviations are ±19 m(-1) ±12.90 με respectively.