A5011413763- Advanced Fiber Optic Sensors
- Spectroscopy and Laser Applications
- Photonic and Optical Devices
- Atmospheric chemistry and aerosols
- Gas Sensing Nanomaterials and Sensors
- Photonic Crystal and Fiber Optics
- Optical Wireless Communication Technologies
- Advanced Fiber Laser Technologies
- Advanced Chemical Sensor Technologies
- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Advanced Optical Sensing Technologies
- Atmospheric Ozone and Climate
- Optical Systems and Laser Technology
Huazhong University of Science and Technology
2023-2024
Guilin University of Electronic Technology
2022-2024
Yangtze Optical Electronic (China)
2022
A high-precision low-cost mid-infrared photoacoustic sensor for greenhouse composite gases based on aspherical beam shaping is proposed and demonstrated. The assembled optical source module luminous characteristics of infrared are innovatively investigated analyzed with shaping. aspherical-beam-shaping-technique could effectively reduce loss enhance system sensitivity, achieving an effective power utilization ratio a radiation 91% sidewall noise 8.9%. Experiments verify the 1.7 times...
We proposed a novel temperature-compensated multi-point strain sensing system based on cascaded FBG and optical FMCW interferometry. The former is used for simultaneous of temperature strain, the latter position information reading multiplexing. In experiment, narrow linewidth laser with continuous frequency-sweeping was as light source. After demodulating beat-frequency signal, link 16 m fiber obtained, measured result identical to actual position. measurement accuracy reached 50.15 mm,...
A quasi-distributed fiber sensing technique with high spatial resolution is proposed and achieved by multiplexing Fabry-Perot (FP) cavities optical frequency-domain reflectometry (OFDR). Two types of FP are designed fabricated to realize temperature relative humidity (RH) sensing, respectively. digital signal processing (DSP) algorithm developed compensate for the nonlinear frequency tuning errors induced laser source. The sensors could be located in domain demodulated wavelength domain,...
A quasi-distributed fiber optic relative humidity sensing system based on optical frequency modulated conti-nuous wave (FMCW) multiplexing Fabry-Perot interferometer (FPI) is proposed. In this paper, the fundamental structure and locating principle are introduced, layout signal demodulation process described in detail. Next, performance of evaluated through experiments. Finally, stability tested by repeatability The can be used for online monitoring environmental status has significant...
As a continuously tunable laser with high-sweeping linearity, narrow linewidth lasers have excellent coherence properties that make them indispensable for the improvement of spatial resolution optical frequency domain reflection (OFDR) technology. In order to investigate characteristics high-sweep this paper reviews measurement and calculation methods linewidth. The theoretical analysis is also carried out, delayed self-heterodyne system based on non-equilibrium Mach-Zehnder (M-Z)...