A5101676953- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Diamond and Carbon-based Materials Research
- Laser-Matter Interactions and Applications
- Semiconductor Lasers and Optical Devices
- Photorefractive and Nonlinear Optics
- Advanced Sensor and Control Systems
- Spectroscopy and Laser Applications
- Geophysics and Sensor Technology
- Nanowire Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Gas Sensing Nanomaterials and Sensors
- Mechanical and Optical Resonators
- Marine and Coastal Research
- Hydraulic and Pneumatic Systems
- Solid State Laser Technologies
- Structural Health Monitoring Techniques
- Tribology and Lubrication Engineering
- Seismic Waves and Analysis
- Semiconductor materials and devices
- Plasmonic and Surface Plasmon Research
- Advanced MEMS and NEMS Technologies
- Analytical Chemistry and Sensors
Xi'an Shiyou University
2012-2025
Northwest University
2019-2023
Shandong University
2014-2016
State Council of the People's Republic of China
2016
Harbin Electric Corporation (China)
2008
National Laboratory of Solid State Microstructures
1996
In this work, the dynamic change of absorbance for aqueous ethanol detection based on a graphene oxide coated U-bent optical fiber sensor was investigated.
A humidity sensor based on photonic crystal fiber (PCF) is experimentally demonstrated, which was fabricated by sandwiching a taper between PCF and standard single mode (SMF). The collapsed region in excite high-order modes couple them with core to form Michelson interferometer (MI). Experiment results show that the reflection interference intensity linearly changes sensitivity -0.166 dB/%RH range of 30-90 %RH, displayed low temperature cross-sensitivity 0.09 %RH/°C 20-100 °C. In addition,...
A fiber Bragg grating (FBG) sensor capable of simultaneous temperature–pressure measurement is presented and experimentally verified, which consists a diaphragm, special-shaped bracket, dual FBGs, protective housing. The principle temperature pressure with FBGs theoretically illustrated simulated by finite-element analysis. investigated results demonstrate that the can be employed to measure in environments where ranges from 50 °C 200 0 40 MPa. sensitivity 31.8 pm/°C linear correlation...
We report a long-time working femtosecond laser using metal-free sapphire-based graphene as saturable absorber (SA). The yielded excellent nonlinear absorption properties and was demonstrated to be suitable an SA for ultrafast solid-state laser. Stable mode-locked pulses of 325 fs were obtained at central wavelength 1032 nm with repetition rate 66.3 MHz. At pump power 8.23 W the average output 1.78 highest pulse energy reached 26.8 nJ peak 72.6 kW. Our work opens up facile route making...
A novel seven-core fiber (SCF)-based sensor capable of simultaneous measurement temperature and strain was proposed experimentally demonstrated. The consists a Bragg grating (FBG) SCF-based Mach-Zehnder interferometer (MZI). MZI is formed by splicing short section SCF between two single-mode fibers (SMFs), in the meantime, tapers that act as light splitter coupler are at both ends fusion method. In addition, FBG with central wavelength 1547.98 nm cascaded end one taper, thus can be realized....
A small-sized sensor combined with a diaphragm structure and lever is proposed for application in high-temperature high-pressure environments. The feasibility of the verified from both theory simulation, relationship between change Bragg wavelength pressure established. Differential measurements temperature are achieved using two fiber gratings (FBGs). experimental data show that sensitivity 28.86 pm/MPa range 0–30 MPa, correlation coefficient 0.9969. improved 29.76 0.9999. sensor's 32.66...
We describe a novel fiber-optic gas sensor which hydrogen Sulfide (H2S) can be detected by silver coated fiber bragg grating (FBG). The H2S sensitive material Ag on the cladding surrounding surface of FBG conventional mirror reaction. scanning electron microscope (SEM) was applied to analysis film structure before and after interaction with gas. By conducting experiment Ag-coated optical (AOS), relation between concentration absorption spectrum built. Result shows that while alters from 0...
A fiber Bragg grating (FBG) pressure sensor using a composite structure comprising square diaphragm, steel trusses, and vertical beams is proposed studied. The deflection of the diaphragm due to applied transferred as an axial force on FBG mounted at end beams. Measurement principle stress analysis are introduced. experimental results indicate that sensitivity 622.71 pm / MPa across range 0 2 with good linearity recorded 99.996%, hysteresis repeatability calculated be 0.6639% full-scale...
We present a novel method for the direct metal-free growth of graphene on quartz substrate. The direct-grown yields excellent nonlinear saturable absorption properties and is demonstrated to be suitable as absorber (SA) an ultrafast solid-state laser. Nearly Fourier-limited 367 fs was obtained at central wavelength 1048 nm with repetition rate 105.7 MHz. At pump power 7.95 W, average output 1.93 W highest pulse energy reached 18.3 nJ, peak 49.8 kW. Our work opens easy route making reliable...
Optical waveguiding LiNbO3 film was grown on (001)-oriented crystalline SiO2 substrate by pulsed laser deposition. The is highly (012) textured and has smooth surface. Its photoluminescence (PL) spectra were obtained using the 514.4 nm line excitation of Ar+ laser, displaying a broad band peaked at 2.2 eV room temperature three well-resolved luminescent bands 2.3, 2.2, 2.14 liquid nitrogen with different polarization properties. Spectral analysis indicates that these PL arise from...
An ambient refractive index (RI) sensor based on a microfiber coil resonator (MCR) is proposed. Using the coupling wave theory, resonant properties of MCR are theoretically studied. And then, using finite difference time-domain method, sensing characteristic investigated and dependence parameters examined as well. Results show that extremely sensitive to RI variation. And, diameter determines both sensitivity detection limit sensor. Further, rod free spectral range resonance spectrum...
Abstract Based on the characteristics of erbium-doped fiber (EDF), wavelength tuning ring-fiber laser can be realized. Moreover, work well and stably even when a simple structure device is adopted. As pump power 300 mA adopted, output 6.747 mW, tuned in range from 1546.326 nm to 1549.736 nm, as temperature elevated 18.3 °C 109.8 °C. The drift center linearly related with temperature. have potential applications field photoelectric devices.
Fiber Bragg gratings (FBGs) have advantages of easy multiplexing, corrosion resistance, and anti-electromagnetic interference. FBG packaging is an important factor in optical fiber sensing, the substrate material for has a great influence on sensing performance FBG. In this paper, packaged with equal strength cantilever beam made composite material. The principle vibration sensor theoretical analyzed. Then, experiments are performed to test performance. experimental results show that can be...