A5004948643- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Extraction and Separation Processes
- Minerals Flotation and Separation Techniques
- Advanced Measurement and Metrology Techniques
- Magneto-Optical Properties and Applications
- Semiconductor Lasers and Optical Devices
- Metal Extraction and Bioleaching
- Advanced Measurement and Detection Methods
- Optical Systems and Laser Technology
- Advanced Sensor Technologies Research
- Astronomical Observations and Instrumentation
- Electromagnetic Launch and Propulsion Technology
- Electrical and Bioimpedance Tomography
- Inertial Sensor and Navigation
- Recycling and Waste Management Techniques
- Advanced Sensor and Control Systems
- Optical Coherence Tomography Applications
- Magnetic Field Sensors Techniques
- Body Composition Measurement Techniques
- Education and Work Dynamics
- Gas Sensing Nanomaterials and Sensors
- Advanced Electrical Measurement Techniques
Xi'an Technological University
2010-2024
Central South University
2023-2024
Xi'an University of Technology
2020
A novel high-order harmonic-frequency cross-correlation algorithm is proposed for the cavity length interrogation of white-light fiber-optic Fabry-Perot sensors. The uses minimum value a coefficient to determine sensor by fundamental cross correlation. This eliminates ambiguity in identifying main peak coefficient, especially when source bandwidth insufficient. was verified through simulation and experiment using FP with 79.175 μm. reflection spectrum obtained under illumination an amplified...
A white light non-scanning correlation interrogation system was proposed and built to interrogate absolute length of the air cavity fiber-optic compound Fabry⁻Perot pressure sensors for extraction value. By carefully choosing thickness range tilt angle optical wedge used matching, interferometric signal basal can be naturally filtered out. Based on peak positioning by Fourier transform, bandpass filtering in frequency domain, inverse transform back time envelope fitting zero fringe finding...
This study presents an extrinsic Fabry–Perot interferometric (EFPI) fiber-optic strain sensor with a very short cavity. The consists of two vertically cut standard single-mode fibers (SMFs) and glass capillary length several centimeters. SMFs penetrate into the are fixed at its ends use ultraviolet (UV) curable adhesives. Based on lengthy sensitive element, sensitivity can be greatly enhanced. Experiments showed that microcavity EPFI initial cavity lengths 20 μm, 30 40 mm, yield respective...
A simple in-fiber breathing monitoring sensor based on a micro-tapered long-period fiber grating (MT-LPFG) structure was proposed and demonstrated. The MT-LPFG manufactured through the periodical tapering of an optical utilizing CO2 laser fusion splicer. Without use humidity sensitive film, can directly dynamically relative with fast response, which, process be monitored in real time its transmission affected by humidity. Experiments show that rate status during respiration were successfully...
To solve the cavity interrogation problem of short fiber Fabry⁻Perot sensors in white light spectral with amplified spontaneous emissions (ASEs) as sources, a data processing method, using an improved elliptical fitting equation only two undetermined coefficients, is proposed. Based on length sensor without complete reflection spectrum period frequency domain can be interrogated relatively high resolution. Extrinsic air-gap lengths less than 30 μm are used to experimentally verify and...
A fiber-optic, extrinsic Fabry-Perot interferometric (EFPI), dual-cavity sensor made of sapphire was fabricated and interrogated by a dual-segment, low-coherence Fizeau interferometer to achieve simultaneous pressure temperature measurements. The fiber-optic EFPI, had an initial basal cavity length 680 µm vacuum 80 experimentally tested based on It demonstrated that measurement could be achieved in the respective ranges 0.1-3 MPa 20-350 °C.
A fiber-optic vector magnetic field sensor based on a large-core-offset Mach-Zehnder interferometer (MZI) infiltrated by fluid (MF) is proposed and demonstrated in this paper. By fusion splicing of short single-mode fiber (SMF) between lead-in SMF coupling multi-mode fiber, the MZI with sub-millimeter length formed, which then sealed an MF-infiltrated glass capillary. Through MF's refractive index modulation external field, phase light passing through altered. As result, transmission...
A novel miniature magnetic-fluid (MF)-infiltrated eccentric fiber Bragg grating (EFBG) vectorial magnetic field sensor was proposed and experimentally demonstrated. An EFBG with a length of 10 mm an distance <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2~\mu \text{m}$ </tex-math></inline-formula> written in standard single-mode by point-to-point femtosecond laser (FSL) writing process, which then sealed...
Abstract A fiber-optic temperature sensor based on fiber tip polystyrene microsphere is proposed. The structure can be formed simply by placing and fixing a the center of an optical tip. Since has much larger thermal expansivity, used for high-sensitive measurement. By illuminating with broadband light source through Fabry-Perot interference between front back surfaces microsphere, phase difference (OPD) or wavelength shift extraction temperature. Temperature measurement experiment shows...
Economical and efficient separation utilization of spent lithium iron phosphate powder is the key to lithium-ion battery recycling. Flotation, as a low-cost physical enrichment method, has attracted much attention due its promising advantage separating graphite before metallurgical extraction phosphate. However, high-efficiency flotation reagent still challenging. In this work, low-viscosity carboxymethyl cellulose (CMC) was used selective inhibitor in electrode materials (LFPs). With...
The cavity length of short-cavity Fabry-Perot (FP) sensors cannot be effectively interrogated using the conventional peak-to-peak method if spectrum exciting source is not wide enough. In this paper, we propose a squared algorithm for interrogation fiber-optic FP sensors. By squaring DC-filtered reflection an sensor in frequency domain, produce additional peak, with which can estimated same calculations as performed method. For investigation feasibility technique, conducted simulations and...
A magnetic field vector sensor based on a cascaded structure composed of core-offset Fabry–Perot interferometer (FPI) and fluid (MF) infiltrated glass capillary (GC) is proposed demonstrated. An air-gap FPI with cavity length 85 µm formed by fusing two single-mode fibers separated short hollow-core fiber (HCF). The an MF-infiltrated GC. By the directional bending effect caused force MF-filtrated GC, can be monitored in strength direction. Experimental results show that, range 0–9 mT, achieve...