A5049676109- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photoacoustic and Ultrasonic Imaging
- Semiconductor Lasers and Optical Devices
- Optical Coherence Tomography Applications
- Seismic Waves and Analysis
- Advanced Fiber Laser Technologies
- Ultrasonics and Acoustic Wave Propagation
- Analytical Chemistry and Sensors
- Flow Measurement and Analysis
- Gas Sensing Nanomaterials and Sensors
- Photonic Crystal and Fiber Optics
- Cultural Heritage Materials Analysis
- Structural Health Monitoring Techniques
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Advanced MEMS and NEMS Technologies
- Plasmonic and Surface Plasmon Research
- Laser-Matter Interactions and Applications
- Magneto-Optical Properties and Applications
- Advanced Chemical Sensor Technologies
- Adaptive optics and wavefront sensing
Xi'an Shiyou University
2020-2024
Northwest University
2015-2021
Carleton University
2018-2021
An optical fiber humidity sensor based on an Fabry-Perot interferometer is proposed and experimentally demonstrated. The constructed by a short section of hollow-core coated with polyimide (PI) film. Taking advantage the direct response PI film, sensitivity up to 1.309 nm/%RH can be achieved in change range from 40% RH 80% RH. temperature measured 43.57 pm/°C when changes 25°C 55°C. Because its simple structure, fast time, convenient production, good reproducibility, will competitive field...
An easily multiplexed fiber-optic Fabry–Perot interferometer (FPI)-based ultrasonic wave (UW) sensor has been proposed and used to experimentally demonstrate ultrasound imaging of seismic-physical models. The probe comprises an formed by a free-standing gold foil cleaved optic-fiber tip. acoustic focusing lens enhances the sensor's sensitivity assists with capability multiplex multiple probes. Theoretical modeling effect lenses responses probes are presented analyzed. We present experimental...
A fiber-optic sensor has been proposed and demonstrated for the ultrasonic wave (UW) imaging of seismic physical models. The probe comprises a fiber Bragg grating Fabry-Perot (FBG-FP) mounted inside tip an aluminum cone, which focuses UW effectively into fiber. FBG-FP possesses excellent sensitivity because narrow-band notches on top reflection spectrum caused by FP interference. spectral band-side filter technique is used to measure signal. Because symmetrical structure sensor, it provides...
A micro-fiber-optic Fabry-Perot interferometer (FPI) is proposed and demonstrated experimentally for ultrasonic imaging of seismic physical models. The device consists a micro-bubble followed by the end single-mode fiber (SMF). micro-structure formed discharging operation on short segment hollow-core (HCF) that spliced to SMF. This micro FPI sensitive waves (UWs), especially high-frequency (up 10 MHz) UW, thanks its ultra-thin cavity wall micro-diameter. side-band filter technology employed...
A novel optical fiber humidity sensor based on a Mach-Zehnder Interferometer (MZI) is proposed and experimentally demonstrated. The MZI fabricated by three sections of single mode (SMF) two multimode (MMF), where the MMFs are spliced among SMFs. To obtain an excellent sensor, MMF etched with hydrofluoric acid, then sodium alginate coated corroded areas immersed in calcium chloride solution to form (CaAlg) hydrogel fully crosslinking ions. While between 15%~80%, sensitivity can reach 0.48346...
A high-sensitivity optical fiber relative humidity (RH) sensing probe with the ability of temperature calibration is proposed and experimentally demonstrated. It consists a simple Fabry-Perot interferometer constructed by coating layer thin polyimide (PI) film on end face single-mode an upstream Bragg grating (FBG). PI one organic polymer humidity-sensitive materials good comprehensive properties. The cascaded FBG used for elimination cross-sensitivity in process measuring RH. Experimental...
A novel demodulation method for tilted fiber Bragg grating (TFBG) refractometry is proposed and experimentally demonstrated. This "integrated differential area" consists of calculating the difference between measured spectral transmission over a selected bandwidth reference spectrum then integrating absolute value result. has effect multiplying individual cladding mode resonance shifts relative to background noise. The further allows use analyzers with low resolution, including portable ones...
A novel kind of fiber optic ultrasonic sensor based on matching Bragg gratings (FBGs) is proposed and demonstrated. The sensors consist a pair FBGs fixed to special bracket. bracket plays role in stretching squeezing the FBGs, with push–pull effect efficiently coupling signal sensor, thus, improving sensor’s sensitivity. Side-band filtering technology-based intensity interrogation was used detect ultrasounds water. With synergic performed high signal-to-noise ratio (56.9 dB at 300 KHz, 53 1...
An evanescent field optical fiber sensor based on a short section of polarization maintaining spliced with tapered single mode is proposed and experimentally investigated. We mainly focus the refractive index (RI) temperature sensing characteristics this compact device. The transmission spectrum resonance wavelength, induced by interference between excited low order cladding modes core modes, shows quadratic function relationships RI linear temperature. Thus, proposal simple-to-fabricate,...
A sensitivity-improved ultrasonic sensor is proposed and demonstrated experimentally in this present study. The device comprised only a fiber-optic microcavity that formed by discharging short section of hollow core fiber (HCF). key to ensuring the success relies on preprocessing hydrogen loading for HCF. When HCF, heated up during formation air bubble, which enlarges bubble diameter, smoothens its surfaces simultaneously decreases Young’s modulus material bubble. Ultimately, results probe...
Optical Coherence Tomography (OCT) technique is a nondestructive optical detection technology based on low-coherence interferometer and it has become an attractive cultural heritage research method. A 1310 nm source spectral-domain coherence tomography (SD-OCT) system fiber Michelson spectrum analyzer proposed demonstrated for Chinese research. The cross-section OCT images of pigment samples jadeite can provide lot valuable microstructure information the identification works.