DFB Fiber Laser for High-resolution Acoustic Emission Detection Based on Beat Frequency Interrogation
- Resource Type
- Conference
- Authors
- Jia, Qing; Huang, Wenzhu; Zhang, Wentao; Ma, Huaixiang; He, Hongli
- Source
- 2018 Asia Communications and Photonics Conference (ACP) Asia Communications and Photonics Conference (ACP), 2018. :1-3 Oct, 2018
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Photonics and Electrooptics
Signal Processing and Analysis
Time-frequency analysis
Demodulation
Fiber lasers
Signal resolution
Strain
Optical fiber sensors
Optical fiber communication
acoustic emission
distributed feedback fiber laser
beat frequency
time-frequency analysis
- Language
This paper proposes a compact acoustic emission (AE) detection technique based on distributed feedback fiber laser (DFB-FL) using beat frequency interrogation. Because of the ultra-narrow linewidth of beat frequency and time-frequency analysis method, the detection system can reach a high strain resolution of 6.4×10 −9 with 1 MHz demodulation speed and 400 MHz dynamic range.