A5076054166- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Analytical Chemistry and Sensors
- Power Systems and Renewable Energy
- Advanced Sensor and Energy Harvesting Materials
- Plasmonic and Surface Plasmon Research
- Smart Grid and Power Systems
- HVDC Systems and Fault Protection
- Microgrid Control and Optimization
- Islanding Detection in Power Systems
- Power Systems and Technologies
- High-Voltage Power Transmission Systems
- Power Systems Fault Detection
- Non-Invasive Vital Sign Monitoring
- Mechanical and Optical Resonators
- Spectroscopy and Laser Applications
- Heart Rate Variability and Autonomic Control
- Tactile and Sensory Interactions
- Caching and Content Delivery
- Advanced Photonic Communication Systems
- Diabetic Foot Ulcer Assessment and Management
- Multilevel Inverters and Converters
University of Mons
2013-2025
Shantou University
2020-2022
China Electric Power Research Institute
2008-2016
North China Electric Power University
2008-2016
Electric Power Research Institute
2008-2010
In this work, we report fiber Bragg gratings (FBGs) embedded in silicone tubes for joint movement monitoring. We integrate the sensors on finger guard bands and worn a mechanical setup bending demonstrate shift of central wavelength FBG about 0.45 nm 80° bending, with sensitivity 5.6±0.5pm/°. By integrating sensor finger, arm, knee sinuous-shape, monitor joint, ability to distinguish motion. The proposed has potential application Stroke rehabilitation.
Bragg gratings photo-inscribed in polymer optical fibers (POFs) are more sensitive to temperature and pressure than their silica counterparts, because of larger thermo-optic coefficient smaller Young's modulus.Polymer fiber (POFBGs) most often photo-written poly(methylmethacrylate) (PMMA) based materials using a continuous-wave 325 nm HeCd laser.In this work, we present the first study about birefringence effects POFBGs manufactured different types fiber.To achieve this, highly reflective (>...
A simple plastic optical fiber (POF) based surface plasmon resonance (SPR) sensor is proposed and demonstrated for simultaneous measurement of refractive index (RI) temperature. The consists a series V-grooves along the POF side-polish structure at other side fiber. V-groove can alter SPR excitation angle act as mode filter, effectively enhancing effect narrowing wavelength width. After coating layer thermosensitive material-polydimethylsiloxane (PDMS) film on half part probe, dual-parameter...
Sleep quality plays an essential role in human health and has become index for assessing physical health. Here, a pressure-sensitive, noninvasive, comfortable smart pillow was developed based on FBG sensor array to monitor head movements real time during sleep. The embedded the polydimethylsiloxane (PDMS)-based silicone button improved pressure sensitivity durability. of further optimized by modifying structure bulge thickness second layer. Both real-time monitoring position static state...
Musculoskeletal issues frequently affect individuals who sit for prolonged periods, particularly in work settings. Addressing and preventing these upper body musculoskeletal disorders (UBMDs) requires close monitoring of seated behavior among employees. This study introduces a solution—an adaptable wearable device incorporating three distinct modular devices using fiber Bragg grating (FBG) technology. The FBG array, integrated into polydimethylsiloxane (PDMS)-based double fishtail (DF)...
During the past few years, a strong progress has been made in photo-writing of fiber Bragg gratings (FBGs) polymer optical fibers (POFs), animated by constant wish to enhance grating reflectivity and improve sensing performances. In this paper, we report photo-inscription highly reflective step-index POFs, obtained thanks slight etching cladding. We demonstrate that cladding diameter decrease ~12% is an ideal trade-off produce with enhanced axial strain sensitivity, while keeping almost...
We report the first slightly tilted Bragg gratings photo-inscription in polymer optical fiber (POF). For this, we make use of trans-4-stilbenemethanol-doped photosensitive step-index poly(methyl methacrylate) (PMMA) POFs. Tilted (TFBGs) are inscribed near-infrared wavelength range using scanning phase mask technique with a plane perpendicular to laser beam direction. The transmitted amplitude spectrum evolution 3° TFBG is analyzed as function surrounding refractive index. A maximum...
We report the inscription of fiber Bragg gratings (FBGs) and Fabry-Perot (FP) cavities in a gradient index cyclized transparent optical polymer (CYTOP) (POF) using femtosecond laser. Through careful control parameters, coupling between grating fiber's higher order propagation modes is reduced, allowing for single peak spectra. Furthermore, we inscribe 10-nm chirped an FBG FP cavity with free spectral range 240 pm. measure group delay characterize strain temperature.
This work presents a stretchable elastomer optical fiber sensor incorporated into belt for respiratory rate (RR) and heart (HR) monitoring. Different materials shapes of prototypes designed were tested in terms performance the best choice was identified. The optimal by 10 volunteers to evaluate performance. proposed can achieve simultaneous measurement RR HR different body positions, also ballistocardiography (BCG) signal lying position. has good accuracy stability, with maximum errors 1 bpm...
In this article, a reflective surface plasmon resonance (SPR) sensor based on multimode fiber (MMF)–hollow core (HCF) structure is proposed for simultaneous measurement of temperature and humidity. Along the HCF, two different films, i.e., polyvinyl alcohol (PVA) film polydimethylsiloxane (PDMS) are coated outer to generate SPR resonances at wavelengths achieve function. order get better sensing performance, length ratio PVA PDMS film, coating times optimized. The experimental results show...
The fault characteristic of inverter interfaced DG is very different from that synchronous rotating generators. Traditional protection methods based on large current are no longer applicable to inverter-only supplied microgrid. This paper analyzes the behaviour microgrid, and proposes an adaptive algorithm for this type According DG, it uses component which only presents in condition. result simulated proved by DigSilent.
Modular multilevel is a new type of topological structure. The voltage source converter that adopts this named as Multilevel Converter-MMC. In paper, the operating principle MMC analysed and mathematical model based on switching function presented, then average value in DQ coordinates deduced order to meet requirements control system design. non-linear current decoupling strategy proposed. Computer simulation performed verify efficiency strategy. addition, results show good performance quick...
We propose and experimentally demonstrate a fiber refractometer based on C-shaped the Vernier effect. The sensor is fabricated by cascading single mode (SMF) pigtail together with segment another SMF segment. Thus, would constitute an open cavity (sensing cavity) in which test analytes could be filled, while reference cavity. Due to similar optical path length of these two cavities, effect activated, thus forming spectral envelops reflection spectrum sensor. Variations refractive index (RI)...
In this paper, we propose an in-line fiber sensor probe based on UV-glue-assisted cascaded Fabry–Perot cavities for temperature measurement. The UV-curable adhesive in the sensing cavity plays important role due to its high thermo-optic coefficient. We show that sensitivity depends optical path length difference between both cavities. report a maximum value of 12.57 nm/°C range 20 30 °C. This original architecture features low cost and simple structure can be straightforwardly manufactured...
Robotic tactile sensing technology is crucial for the advancement of intelligent humanoid robotics. Recently, optical fiber-based sensors have attracted significant attention, leading to rapid developments in field. Inspired by spatial distribution and multipoint capabilities mechanoreceptors human skin, we introduce a stretchable flexible fiber sensor with gradient-colored segments embedded within its core alongside fabrication method. Our findings demonstrate that loss coefficients...
An endlessly single-mode doped microstructured poly(methyl methacrylate) (PMMA) optical fiber is produced for effective Bragg grating (FBG) photo-inscription by means of a 400 nm femtosecond pulsed laser and the phase mask technique. The presents uniform benzyl dimethyl ketal (BDK) distribution in its core without drastic loss increase. It was using selected center hole doping technique, BDK dopant acts as photoinitiator. In this Letter, we report rapidly growing process reflection band. For...
In this paper, a linearly chirped fiber Bragg grating (CFBG) inscribed in microstructured polymer optical (mPOF) has been demonstrated for detecting temperature profiles during thermal treatments. A CFBG of 10-mm length and 0.98-nm bandwidth an mPOF by means KrF laser uniform phase mask. The high sensitivity -191.4 pm/°C. used as semi-distributed sensor, capable the profile along length, scenarios that account minimally invasive biomedical Two experiments have designed to validate...
We report the first excitation of surface plasmon waves at near-infrared telecommunication wavelengths using polymer optical fibers (POFs) made poly(methyl methacrylate) (PMMA). For this, weakly tilted fiber-Bragg gratings (TFBGs) have been photo-inscribed in core step-index POFs and fiber coated with a thin gold layer. Surface resonance is excited radially polarized modes spectrally observed as singular extinction some cladding-mode resonances transmitted amplitude spectrum gold-coated...