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27 September 2023 Vibration detection system based on directly modulated chirped pulses and grating pair
Ruimin Jie, Lingmei Ma, Xu Liu, Yunjiang Rao, Bo Liu
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Proceedings Volume 12813, Asia-Pacific Optical Sensors Conference (APOS 2023); 128130E (2023) https://doi.org/10.1117/12.2692171
Event: Asia Pacific Optical Sensors Conference 2023, 2023, Tianjin, China
Abstract
A novel vibration detection system based on directly modulated chirped pulses and a grating pair is proposed. Information of the vibration is obtained by demodulating the phase change of the interference fringes from reflection of the grating pair. The system has an operating frequency range of 1 Hz to 30 kHz, and the difference in frequency response between the system and a commercial accelerometer is less than 1%. This vibration detection system provides a sensitive and high-speed vibration detection scheme with a wide frequency range. At the same time, it has the advantages of low cost and simple structure, making it an attractive option for various applications.
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Ruimin Jie, Lingmei Ma, Xu Liu, Yunjiang Rao, and Bo Liu "Vibration detection system based on directly modulated chirped pulses and grating pair", Proc. SPIE 12813, Asia-Pacific Optical Sensors Conference (APOS 2023), 128130E (27 September 2023); https://doi.org/10.1117/12.2692171
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KEYWORDS
Vibration
Sensors
Accelerometers
Optical fibers
Optical gratings
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