A5000937523- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Analytical Chemistry and Sensors
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Sensor and Energy Harvesting Materials
- Mechanical and Optical Resonators
- Magneto-Optical Properties and Applications
- Advanced MEMS and NEMS Technologies
- Spectroscopy and Laser Applications
- Plasmonic and Surface Plasmon Research
- Advanced Chemical Sensor Technologies
- Optical Coherence Tomography Applications
- Photorefractive and Nonlinear Optics
- Photonic Crystals and Applications
- Lower Extremity Biomechanics and Pathologies
- Solid State Laser Technologies
- Image and Signal Denoising Methods
- Foot and Ankle Surgery
- Gas Sensing Nanomaterials and Sensors
- Nanofabrication and Lithography Techniques
- Diabetic Foot Ulcer Assessment and Management
Hong Kong Polytechnic University
1997-2024
James J. Peters VA Medical Center
2024
Icahn School of Medicine at Mount Sinai
2024
Mental Illness Research, Education and Clinical Centers
2024
Shenzhen Technology University
2017-2023
Stryker (United States)
2023
Globus Medical (United States)
2023
Zimmer Biomet (Netherlands)
2023
New York University Langone Orthopedic Hospital
2023
University of Toronto
2023
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...
A photonic crystal fiber (PCF)-model interferometer (MI)-based relative humidity (RH) sensor is proposed and experimentally demonstrated. The PCF-MI formed by fusion splicing a short length of PCF between two single-mode fibers with the air holes in regions being fully collapsed. It was then coated layer polyvinyl alcohol using dip-coating process. Experimental results show that high sensitivity 40.9 pm/%RH achieved within measurement range 20-95%RH. also shows good repeatability low...
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.
A relative humidity (RH) sensor based on a hybrid fiber grating coated with polyvinyl alcohol is proposed and demonstrated experimentally. The formed by superimposing normal Bragg (FBG) tilted-FBG around the same position of single-mode so that it can work in reflection mode. Optical power reflected signal changes refractive index moisture sensitive alcohol, measurement be realized. Experimental results show range 30 to 95% maximum sensitivity 0.737 nW/% RH. average response time ∼2 s nearly...
A gold-coated photonic crystal optical fiber (PCF) sensor has been proposed as a surface plasmon resonance biosensor. The was fabricated by collapsing the holes of PCF at both ends, causing light from multimode to reach cladding/gold interface for excitation. Mixed thiol and protein G coating were employed on gold surface, which improved orientation IgG leading enhanced performance. able monitor binding kinetics (anti-IgG) complexes minimum detection limit concentration 0.267 mg/L anti-IgG found.
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...
We present a simple photonic crystal fiber interferometer (PCFI) that operates in reflection mode for pH measurement. The sensor is made by coating polyvinyl alcohol/polyacrylic acid (PVA/PAA) hydrogel onto the surface of PCFI, constructed splicing stub PCF at distal end single-mode with its free airhole collapsed. experimental results demonstrate high average sensitivity 0.9 nm/pH unit 11 wt.% PVA/PAA coated range from 2.5 to 6.5. also displays repeatability and stability low...