A5015332169- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Magneto-Optical Properties and Applications
- Optical Network Technologies
- Analytical Chemistry and Sensors
- Characterization and Applications of Magnetic Nanoparticles
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor Lasers and Optical Devices
- MXene and MAX Phase Materials
- Graphene research and applications
- Advanced Chemical Sensor Technologies
- Machine Learning and Algorithms
- Advanced Algorithms and Applications
- Image Processing Techniques and Applications
- Electronic Packaging and Soldering Technologies
- Photoacoustic and Ultrasonic Imaging
- Metaheuristic Optimization Algorithms Research
- Metallurgical Processes and Thermodynamics
- Cyclone Separators and Fluid Dynamics
- Gas Sensing Nanomaterials and Sensors
- Covalent Organic Framework Applications
- Nonlinear Photonic Systems
- Advanced oxidation water treatment
Analysis and Testing Centre
2023-2024
Sichuan University
2023-2024
Shanghai University
2024
National Metrology Centre
2023
Agency for Science, Technology and Research
2023
Tongji University
2022-2023
Hefei University of Technology
2022
Nanyang Technological University
2010-2019
Tianjin University
2008-2012
World Wide Web Consortium
2002
A novel magnetic field fiber sensor based on fluid is proposed. The configured as a Sagnac interferometer structure with film and section of polarization maintaining inserted into the loop to produce sinusoidal interference spectrum for measurement. output shifted change applied strength sensitivity 16.7 pm/Oe resolution 0.60 Oe. optical power varied 0.3998 dB/Oe.
A magnetic field sensor based on combination of the fluid and tunable photonic bandgap effect crystal fiber is proposed. The with higher refractive index (>1.45) prepared filled into air-holes to convert guiding fiber. proposed takes full advantage ultrahigh sensitivity characteristic achieves a high resolution 1.56 nm/Oe 0.0064 Oe, respectively, which are 2-3 orders magnitude better than other sensors fluid.
A novel magnetic field sensor based on the fluid and Mach-Zehnder interferometer is proposed. The takes advantage of tunable refractive index property modal interference collapsed photonic crystal fiber. achieved sensitivity resolution are 2.367 pm/Oe 4.22 Oe, respectively. insensitive to temperature variation with a coefficient 3.2 pm/°C.
An optical fiber twist sensor is proposed by using solid core low birefringence photonic crystal (LB-PCF)-based Sagnac interferometer. The effects on the are theoretically analyzed. results show that dip wavelength of transmission spectrum shifts with angle a high sensitivity and resolution 1.00 nm/ <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sup> 0.01 , respectively. also insensitive to environmental temperature change an ultralow...
A novel magnetic field sensor using tilted fiber Bragg grating (TFBG) interacting with fluid is proposed and experimentally demonstrated.The TFBG surrounded by whose complex refractive index changes external field.The guiding properties of cladding modes excited the are therefore modulated field.As a result, strength measurement successfully achieved within range up to 196 Gauss monitoring extinction ratio mode resonance.Furthermore, temperature variation can be obtained simultaneously from...
In this paper, a novel strain sensor is proposed and demonstrated by employing modified photonic crystal fiber (PCF)-based Mach–Zehnder interferometer, in which collapsed region introduced at the middle point of PCF to improve extinction ratio. Experimental results show that structure has high sensitivity 11.22 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\hbox{dB/m}\varepsilon$</tex></formula>...
A magneto-optic modulator with a magnetic fluid film inserted into an optical fiber Sagnac interferometer is proposed. The exhibits variable birefringence and Faraday effect under external field that will lead to phase difference polarization state rotation in the interferometer. As result, intensity of output light modulated field. Moreover, has high extinction ratio can easily be integrated single-mode system. performance not affected by ambient temperature variation from room 40 °C.
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Jie Zheng, Xinyong Dong, Peng Zu, Junhua Ji, Haibin Su, Perry Ping Shum; Intensity-modulated magnetic field sensor based on fluid optical fiber gratings. Appl. Phys. Lett. 28 October 2013; 103 (18): 183511. https://doi.org/10.1063/1.4828562 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends...
An optical fiber relative humidity (RH) sensor is proposed and experimentally demonstrated with a multimode-fiber taper coated layer of polyvinyl alcohol cascading Bragg grating. The operation based on the interaction between evanescent field coating along waist. Humidity changes refractive index extended coating, thus transmission loss light signal introduced measurement therefore realized. sensitivity enhanced since passes through twice. A maximum 1.994 μW/%RH achieved within range...
A multiband bandpass microwave photonic filter (MPF) whose passband number and position can be selected is theoretically analyzed experimentally demonstrated. The proposed MPF based on a wide-band optical source (WBOS) two-order high-birefringence fiber loop mirror (HB-FLM), which serves as slicing filter. Two segments of (HBF) with the lengths 3 m 6 are used in HB-FLM, three typical spectral periods or their combinations independently achieved by simply adjusting polarization controllers...
A modal interferometer made of a short ethanol-filled photonic crystal fiber (PCF) combined with fully collapsed splicing single-mode fibers (SMFs) is proposed for temperature measurement. Two regions between the PCF and SMFs excite recombine two interfering modes in PCF. The interference spectrum more sensitive to than that original By monitoring one peak wavelength shift spectrum, sensitivity reaches up -0.35 nm/°C 3.25-cm long
A relative humidity fiber sensor based on polarization maintaining (PM) Sagnac interferometery configuration is presented. The proposed functionalized with a thin layer of moisture-sensitive natural polymer chitosan, whose degree swelling varies as function humidity. sensing scheme used in this study the strain effect induced PM to modulate its birefringence property through chitosan. To optimize sensor's response, experiments were first conducted evaluate chitosan concentration fiber,...
An optical fiber transverse mechanical load sensor is fabricated by using a short section of solid core photonic crystal (PCF) which inserted inside Sagnac loop. initial force applied on the PCF to introduce necessary birefringence for measurement. A transmission spectrum shift corresponding measured with high sensitivity 0.519 nm N−1 mm−1 achieved. The proposed also temperature-insensitive due ultralow thermal dependence PCF.
A novel magneto-optical fiber modulator with a high extinction ratio (ER) based on polarization interference structure is proposed. magnetic fluid (MF) film and section of polarization-maintaining (PMF) are inserted into the to generate suitable sinusoidal spectrum for light modulation. The MF leads shift under external field due its magnetically controllable birefringence, whereas PMF used control period spectrum. In this experiment, modulation ER 38 dB demonstrated.
A label-free, layer-by-layer (LBL) modified, fiberoptic interferometry biosensor for real-time affinity-based protein sensing applications has been proposed. The proposed sensor allows adsorption detection by monitoring interference wavelength shifts, which offers better dynamic range and stability in comparison to current of changes optical intensity. With a label-free mechanism, it eliminates issues progressive leaching indicators, expensive time-consuming labeling procedures undesirable...
A fiber-optic temperature sensor based on a pressure-induced birefringent single-mode fiber (SMF) loop mirror is developed. The SMF made by applying force against short section of length SMF. the sensing element for about 50 mm. Wavelength spacing between two adjacent interference minima can be tuned varying applied pressure. sensitivity measurement 0.65 nm °C−1 achieved experimentally. proposed more convenient and simpler than that polarization-maintaining photonic crystal or standard fibers.
A novel magnetic field sensor based on the degenerate four-wave mixing (DFWM) technique is theoretically proposed using a As2S3-core silica-cladding photonic crystal fiber (PCF). In order to enhance sensitivity, we put forth design of highly nonlinear PCF where silica cladding doped with either Au, Ag, or Al metallic nanoparticles. The effect volume fraction nanoparticles within and size are considered as control parameters in designing obtain high sensitivity this DFWM scheme. structure...
An attack–defense confrontation problem arises from a robot swarm attacking territory protected by another one. In denied environments, global positioning and communication are hardly available. It becomes difficult for to realize collaboration handle against another. Commonly used deep reinforcement learning (DRL) relies on pretraining, which is time consuming has strong environmental dependence, especially in environments. To study attack strategies this work proposes novel evolutionary...