A5100345264- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Photonic Crystal and Fiber Optics
- Molecular Junctions and Nanostructures
- Metamaterials and Metasurfaces Applications
- Terahertz technology and applications
- Acoustic Wave Resonator Technologies
- Photonic Crystals and Applications
Beijing Jiaotong University
2024-2025
North China University of Water Resources and Electric Power
2022-2023
City University of Hong Kong
2007-2010
Terahertz (THz) fingerprint metasensing is an effective method for identifying biological substances, offering advantages such as high efficiency and non-destructiveness. Currently, one important approach to achieving THz spectrum sensing...
We experimentally demonstrate the contradirectional optical coupling between two parallel fibers that contain a long-period fiber grating and tilted Bragg grating, respectively. Strong occurs cladding modes of same order over overlapped resonance bands gratings. By optimizing conditions, we achieve peak efficiency ~80% at ~1534 nm with 3 dB bandwidth ~0.12 side-mode suppression ratio ~16 dB, regardless which light is launched into. This coupler configuration can be explored for development...
We propose a microwave photonic filter based on circulating cladding mode in fiber ring resonator, where the is injected into and extracted from resonator with pair of matching long-period gratings (LPFGs). The has compact configuration allows frequency spacing notch depth to be tuned easily. use LPFGs also provides capability wavelength selection tuning. Using standard single-mode CO(2) laser-written LPFGs, we demonstrate approximately 1.3 GHz 17 dB. Our experimental results agree well...
We propose a new technique of realizing symmetric 3 x optical coupler, which is based on evanescent-field coupling among three identical parallel long-period fiber gratings placed side-by-side. Using 32-mm-long over-coupled embedded in medium with proper refractive index, we achieved equal power outputs from the fibers at resonance wavelength total loss about 1.4 dB when light was launched into any one fibers.
We demonstrate experimentally a Mach-Zehnder type microwave photonic filter, which employs cladding-mode coupler formed with pair of long-period fiber gratings to provide continuous and precise tuning the free spectral range.
A photonic crystal fiber (PCF) sensor is proposed for the detection of refractive index (RI), magnetic field intensity, and temperature. The large air hole in center filled with a fluid (water-based Fe3O4) whose RI changes intensity top polished coated gold film, external sensing technology used to detect analyte. Due characteristics structure, lower upper parts can temperature, RI. simulation results show that field, sensitivities reach maximum 1.57 nm/Oe, −1 nm / ° C, 7600 nm/RIU range 22...