A5063941496- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Advanced Sensor and Energy Harvesting Materials
- Spectroscopy and Laser Applications
- Spectroscopy and Chemometric Analyses
- EEG and Brain-Computer Interfaces
- Semiconductor Lasers and Optical Devices
- Spectroscopy Techniques in Biomedical and Chemical Research
Yanshan University
2021-2023
In this article, a fiber optic sensor based on double-cladding (DCF) composite tapered structure cascaded long-period gratings (LPFGs) for measuring refractive index (RI), temperature, and axial strain is designed. The two ends of Section DCF are, respectively, fused with single-mode (SMF) LPFG1 to form up-tapers, then the formed into down-taper. Another end LPFG2, center wavelengths LPFGs are different. LPFG1, generate three resonance peaks, namely, dip1, dip2, dip3, whose sensitivity in...
A few mode fiber temperature sensor filled with PDMS based on vernier effect is proposed. It uses single fiber(SMF), fiber(FMF), and polydimethylsiloxane(PDMS) to form the SMF-air microcavity-FMF-PDMS-FMF structure. The used as a sensing microcavity. When changes, length refractive index of microcavity will change accordingly, which cause in interference spectrum sensor. And because formed by superposition two microcavities, sensitivity can be obviously amplified measured high sensitivity....
A cascaded eccentric hole fiber (EHF) sensor with a dumbbell-shaped structure for large-range torsion measurement is proposed and prepared. It consisting of an EHF two sections single-mode (SMF) which are made into spheres by electric discharge. The main sensing the SMF sphere–EHF–SMF sphere. In first sphere fusion point position, appearance mode-field mismatch refractive index perturbation, noncircular symmetric (NS) higher order mode (HM) created, effective (ERI) difference between HM...
A directional curvature sensor using excentric heterogeneous fiber (EHF) filled polydimethylsiloxane (PDMS) with spherical structure is proposed and prepared. The main of the an EHF cascaded two structures made single-mode fibers (SMFs), cladding eccentric core are corroded PDMS. asymmetry causes it to transmit asymmetric modes. It produces different spectral shift effects for bending in directions, so can be used detection multiple directions. Experimental results show that range 0–0.73...
A method for measurement of antiepileptic drug concentrations based on Raman spectroscopy and an optimization algorithm mathematical models are proposed investigated.