A5100397495- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Semiconductor Lasers and Optical Devices
- Geophysics and Sensor Technology
- Optical Network Technologies
- Optical Wireless Communication Technologies
- Mechanical and Optical Resonators
- Structural Health Monitoring Techniques
- Advanced Optical Sensing Technologies
- Surface Roughness and Optical Measurements
- Analytical Chemistry and Sensors
- Optical measurement and interference techniques
- Underwater Acoustics Research
- Gas Sensing Nanomaterials and Sensors
- Advanced Sensor Technologies Research
- Advanced MEMS and NEMS Technologies
- Neurological Disease Mechanisms and Treatments
- Speech and Audio Processing
- Optical Coherence Tomography Applications
- Ultrasonics and Acoustic Wave Propagation
- Plasma Diagnostics and Applications
- Plasma Applications and Diagnostics
- Spectroscopy and Laser Applications
North University of China
2025
Huazhong University of Science and Technology
2024
Commercial Aircraft Corporation of China (China)
2024
Shenyang Pharmaceutical University
2024
Dalian University
2011-2023
Dalian University of Technology
2012-2023
Harbin Institute of Technology
2020-2023
Southern University of Science and Technology
2021-2023
Donghua University
2023
Northwest University
2011-2022
Abstract The femtosecond laser has emerged as a powerful tool for micro- and nanoscale device fabrication. Through nonlinear ionization processes, nanometer-sized material modifications can be inscribed in transparent materials This paper describes precision inscription of nanograting silica fiber cores to form both distributed point sensors sensing applications extreme environmental conditions. the use scanning electron microscope imaging processing optimization, high-temperature stable,...
Detection of weak acoustic signals is great significance. To achieve ultrahigh sensitivity detection, a silicon cantilever-based fiber-optic sensor (FOAS) formed by Fabry–Perot interferometric structure proposed in this work. Theoretical analysis and finite element are used to assist the design. The cantilever fabricated microelectro-mechanical system (MEMS) processing technology on silicon-on-insulator (SOI) wafer. A white light interference (WLI) demodulation based an amplified spontaneous...
A fiber-optic Fabry-Perot (F-P) sensor, based on a pendulum structure, for simultaneous measurement of tilt angle and vibration acceleration was proposed, which also has high-tilt resolution. The real-time cavity lengths are absolutely measured using fast demodulation algorithm. is estimated from the mean value while derives alternating quantity them. series experiments conducted micro-tilt platform table to simulate change perturbation, respectively. experimental results show resolution...
A Fabry-Perot (F-P) interferometric fiber-optic cantilever sensor is presented for simultaneous measurement of acoustic pressure and temperature, which are demodulated by a single high-speed spectrometer. The wave pushes the to produce periodic deflection, while temperature deforms causes F-P cavity length change slowly. absolute calculated rapidly using spectral demodulation method. obtained high-pass filtering averaging continuously measured value, respectively. experimental results show...
This Letter presents an approach to produce multiplexable optical fiber chemical sensor using intrinsic Fabry-Perot interferometer (IFPI) array via the femtosecond laser direct writing technique. Using hydrogen-sensitive palladium (Pd) alloy as a functional sensory material, Pd coated IFPI devices can reproducibly and reversibly measure hydrogen concentrations with detection limit of 0.25% at room temperature. Seven sensors were fabricated in one performed simultaneous temperature...
In this paper, we realize a wideband fiber-optic Fabry-Perot (F-P) acoustic sensing (FPAS) scheme by utilizing high-speed absolute cavity length demodulation with 70-kHz maximum line rate spectrometer. The FPAS is made of pre-stress stainless-steel diaphragm based on F-P interferometric structure. real-time lengths are calculated phase method, which realized processing the interference image at frame rate. Acoustic signal obtained extracting AC component demodulated length. experimental...
A practical optical fiber sensor is proposed for hydraulic pressure measurement. thin-walled cylinder used as the sensing device, which will be deformed with applied pressure. Two Bragg gratings (FBGs) are in probe. One stuck on outer wall of along circumferential direction to measure deformation cylinder. The other FBG groove top and acts a temperature measurement device. accurate can obtained by monitoring difference two shifted wavelengths. Theoretical relation between wavelength shift...
A small probe-type optical fiber flowmeter was proposed for fluid flow measurement. The hollow cylindrical cantilever first used to measure the force caused by fluid. couple of Bragg gratings (FBGs) that were stuck on inner wall strain cantilever. rate can be obtained monitoring difference two shifted wavelengths. cross-sensitivity problem FBG sensors solved differential measurement method. Theoretical relation between wavelength shift and has been established theoretical analysis....
This paper presents a method of using femtosecond laser inscribed nanograting as low-loss– and high-temperature–stable in-fiber reflectors. By introducing pair inside the core single-mode optical fiber, an intrinsic Fabry-Perot interferometer can be created for high-temperature sensing applications. The morphology in fiber cores was engineered by tuning fabrication conditions to achieve high fringe visibility 0.49 low insertion loss 0.002 dB per sensor. Using white light interferometry...
The basal plane of transition metal dichalcogenides (TMDCs) is inert for the hydrogen evolution reaction (HER) due to its low-efficiency charge transfer kinetics. We propose a strategy filling van der Waals (vdW) layer with delocalized electrons enable vertical penetration from collector adsorption intermediate vertically. Guided by density functional theory, we achieve this concept incorporating Cu atoms into interlayers tantalum disulfide (TaS2). d-orbitals interlayered can constitute...
Abstract Diabetic foot ulcer is a serious complication of diabetes. Excessive accumulation advanced glycation end products (AGEs) one the critical pathogenic factors in postponing diabetic wound healing. The main mechanisms AGEs include inducing cellular dysfunction, prolonging inflammatory response, increasing oxidative stress and reducing endogenous nitric oxide (NO) production. Combination therapy blocking deleterious effects supplementing exogenous NO hypothesized to promote Here, we...
Demodulation of fiber optic Fabry-Pérot (F-P) acoustic sensors with high sensitivity and a large dynamic range continues to pose significant challenges. In this paper, we propose an advanced phase-generated carrier (PGC) demodulation algorithm, applied innovatively membrane-free F-P operating under sound pressure. The algorithm optimizes results by adjusting the mixing phase delay, achieving best signal noise distortion ratio (SINAD) total harmonic (THD) (<1%). Additionally, introducing...
A <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">S</mml:mi> mathvariant="normal">i</mml:mi> </mml:mrow> <mml:msub> mathvariant="normal">O</mml:mi> <mml:mn>2</mml:mn> </mml:msub> <mml:mo>/</mml:mo> mathvariant="normal">T</mml:mi> </mml:math> bilayer thin-film-based fiber optic humidity sensor was fabricated via a modified dip coating process with enhanced sensitivity. film coated on the surface of...
Excitotoxicity has been implicated in neurological disorders. This study investigated the neuroprotective effect of extract from Rhizoma Atractylodis macrocephalae on excitotoxicity‐induced neuronal apoptosis primary cultured cerebral cortical neurons. was induced by exposure neurons to glutamate. Neuronal and protective were examined multi‐indices including cell viability assay, morphological features, DNA fragmentation flow cytometric analysis. After glutamate for 24 h, exhibited marked...
This paper presents a fast demodulation algorithm to determine fiber Bragg grating (FBG) from spectra acquired by low wavelength resolution spectrometers. A modified and improved Buneman frequency estimation is employed in tracking FBG eliminating discontinuities real-time calculations. The was tested using 512-element detector array spectrometer with 156 pm/element resolution. At 2-kHz spectrum acquisition rate, the achieved 0.048 pm computational efficiency robustness of new compared...