A5020748009- Advanced Fiber Optic Sensors
- Optical Network Technologies
- Optical Wireless Communication Technologies
- Calibration and Measurement Techniques
- Advanced Memory and Neural Computing
- Infrared Target Detection Methodologies
- Neuroscience and Neural Engineering
- Advanced Sensor Technologies Research
- 2D Materials and Applications
- MXene and MAX Phase Materials
- Seismic Waves and Analysis
- Ferroelectric and Negative Capacitance Devices
- Underwater Vehicles and Communication Systems
- Chalcogenide Semiconductor Thin Films
- Photonic and Optical Devices
- Structural Health Monitoring Techniques
University of Chinese Academy of Sciences
2020-2025
Shanghai Institute of Technical Physics
2018-2025
Shanghai Institute of Optics and Fine Mechanics
2020-2021
Chinese Academy of Sciences
2020
In this letter, a distributed optical fiber hydrophone (DOFH) based on Φ-OTDR is demonstrated and tested in the field. The specially designed sensitized cable with sensitivity up to −146 dB rad/µPa/m introduced, an array signal processing model for DOFH constructed analyze equivalence specificity of acoustic sensors. field test, 104-meter-long system heterodyne coherent detection (Het Φ-OTDR) utilized, underwater spatial spectrum estimation, beamforming motion trajectory tracking high...
High-stability photovoltaic devices are crucial for low-power or passive applications in fields such as renewable energy, wearable electronics, and deep-space exploration. However, achieving stable controllable doping two-dimensional (2D) materials remains challenging, hindering the optimization of performance. Here, we fabricate three high-performance, self-driven photodetectors based on layered WSe2 with varying concentrations. By leveraging asymmetric Schottky barriers introducing a...
Distributed fiber acoustic sensing (DAS) can detect almost all disturbances along the and is widely applied. However, signals from multiple adjacent disturbance sources are superimposed, according to principle. A directionally coherent enhancement technology demonstrated for DAS suppress multi-source aliasing in air. In preliminary works, two situations considered feasibility verification. The submerged weak target signal effectively extracted strong broadband noise, different same-frequency...
Phase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and amplitude vibration. However, it suffers from limited signal-to-noise ratio (SNR) signal fading, due to inherent low Rayleigh scattering coefficient randomly spatial non-uniform distribution refractive index. Here, a Φ-OTDR system based on wavelength diversity is demonstrated, which can enhance SNR reduce fading simultaneously by...