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Proceedings Paper

High-speed multiplexed fiber laser acoustic emission sensing system using 3×3 coupler and FPGA parallel processing algorithm
Author(s): Wentao Zhang; Wenzhu Huang; Gaoran Guo; Fang Li
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Paper Abstract

This paper proposes a wavelength-division multiplexing fiber laser acoustic emission sensing technique based on 3×3 coupler type interrogation method and a FPGA parallel processing algorithm. Narrow-linewidth (about 3 kHz) singlefrequency distributed feedback fiber lasers are used for acoustic emission probes. A NI FlexRIO device is used to acquire the original signals from the photodetectors. A symmetric demodulation algorithm is executed in the FPGA using parallel data processing structure. The acoustic emission sensing system with four parallel channels and 2 MHz sampling rate achieves a wavelength resolution of 2 × 10-7 pm/√Hz @ 100 kHz.

Paper Details

Date Published: 16 October 2019
PDF: 5 pages
Proc. SPIE 11205, Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019), 1120510 (16 October 2019); doi: 10.1117/12.2541728
Show Author Affiliations
Wentao Zhang, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Wenzhu Huang, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Gaoran Guo, Wuhan Univ. (China)
Fang Li, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11205:
Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019)
Anand Asundi; Motoharu Fujigaki; Huimin Xie; Qican Zhang; Song Zhang; Jianguo Zhu; Qian Kemao, Editor(s)

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