A5044574843- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Magneto-Optical Properties and Applications
- Analytical Chemistry and Sensors
- Flow Measurement and Analysis
- Optical Coherence Tomography Applications
- Advanced MEMS and NEMS Technologies
- Characterization and Applications of Magnetic Nanoparticles
- Plasmonic and Surface Plasmon Research
- Spectroscopy and Laser Applications
- Advanced Photonic Communication Systems
- Optical Systems and Laser Technology
- Optical Wireless Communication Technologies
- Optical Network Technologies
- Advanced Sensor Technologies Research
- Underwater Vehicles and Communication Systems
- Optical measurement and interference techniques
- Seismic Waves and Analysis
- Geophysics and Sensor Technology
- Magnetic Field Sensors Techniques
Zhejiang Lab
2023-2024
Universidad del Noreste
2021-2024
Fiber Optics Research Center
2024
Northeastern University
2018-2022
A new type of two-channel surface plasmon resonance (SPR) sensor based on hollow-core fiber (HCF) for simultaneous measurement seawater salinity and temperature was presented in this article. One the SPR channels that are excited outer HCF with Au film coating used to measure salinity, while another channel is inner Ag polydimethylsiloxane (PDMS) infiltration at same time. The experimental results showed sensitivity could reach 0.3769 nm/ <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A highly sensitive reflective Fabry-Perot (FP) magnetic field sensor using fluid (MF) based on the Vernier effect is presented and experimentally verified. Capillary action acts as an injection of MF into FP cavity, which composed a single-mode fiber (SMF), capillary glass tube, short section SMF coated with gold film. formed by cavity air in sensor, where surface concave. The refractive index (RI) depends field, therefore, wavelength reflection spectrum fabricated can be to field. sensor's...
A multifunctional optical fiber sensor fabricated by asymmetric offset splicing is proposed in this Letter. The light divided into several parts at the interface, among which transmitted forms Mach–Zehnder interference (MZI) spectrum while reflected Fabry–Perot (FPI) spectrum. online monitoring system built to create a better distribution interface. Theoretical analysis and experimental verification are carried out. results of experiment show that has good characteristics salinity...
A magnetic field measurement method based on the magneto-volume effect of fluid (MF) and Fabry-Perot (FP) interferometer (FPI) is proposed, which has higher sensitivity shorter response time than traditional optical fiber methods. The MF partially injected into fabricated FP cavity composed two sections SMFs a capillary glass tube (CGT), where FPI made up end face face. When external applied to sensor, volume change will cause air length. Therefore, reflection spectrum changes with due MF....
A reflective optical fiber sensor that is composed of two Fabry Perot cavities proposed for temperature and salinity measurement. One the cavity which fabricated by offset splicing exposed to ambient directly sense salinity, other employed compensate coupling effect. thin layer gold film coated on refractive index change interface, makes spectrum quality no longer limited difference between sides interface. By applying frequency division multiplexing (FDM) technique length demodulation...
A special open-cavity Mach–Zehnder salinity sensor is presented and verified in this Letter, which has obvious advantages sensitivity loss. The structure composed of a short section etched double-side hole fiber spliced between pair multimode fibers connected series single-mode fibers, the SMF-MMF-etched DSHF-MMF-SMF proposed paper. According to experiment results, when cavity length about 100 µm, sensing probe can reach 2 nm/‰, its refractive index (RI) be more than 10,000 nm/RIU, while...
This article reports a multi-point curvature sensor system based on multiplexed optical fiber Fabry-Perot interferometric (FPI) devices and microwave photonics interrogation technique. The FPI is fabricated with the assistance of capillary tube, where short section sandwiched between two single-mode fibers, forming air-gap cavity. Bending device leads to changes in fringe contrast its reflection spectrum. Based filtering technique, variations are encoded into peak magnitude passband...
The measurement of acoustic signals at high frequencies with a large dynamic range remains challenge for phase-demodulation-based fiber sensing systems due to the phase wrapping phenomenon. Here, an optical path difference (OPD)-assisted demodulation method aiming breaking limitations is reported. By interrogating imbalanced Michelson interferometer (IMI) frequency-modulated pulse light, time-resolved interference spectrum obtained and used OPD demodulation. Theoretical analysis reveals that...
In this paper, a reflective type optical fiber probe, which can measure the salinity and temperature simultaneously, is proposed. The proposed probe integrates Mach-Zehnder interferometer Fabry-Perot in same channel skillfully effectively, makes it possible to integrate more information into sensor. reflected spectrum improved greatly by adopting special sputtering technology. spectrums of are separated applying frequency division multiplex technique. simulation experimental results prove...
Vibration sensing is vital in the health monitoring of critical structures such as aerospace engines. Although there are many mature vibration techniques market, still a lack simple sensors suitable for high temperatures with wide frequency range. In this article, we proposed chirped pulse interferometer (CPI) empowered by pair gold-coated optical fiber partial reflectors. Information obtained demodulating phase change interference fringes from reflection reflector pair. Both simulation and...
For the purpose of monitoring seawater temperature, a novel Mach-Zehnder (MZ) temperature-sensing structure with wedge-shaped open cavity is presented and experimentally studied in this article. The open-cavity realizes direct contact between sensing optical path external environment, ensures high sensitivity structure. At same time, it achieves not only low loss by fusion splicing instead dislocation splicing, but also cost hydrofluoric (HF) etching femtosecond processing. In addition,...