TY - GEN
T1 - Acoustic Wave Sensor Based on the Optical Fiber-Diaphragm Composite Structure
AU - Li, Yujian
AU - Lyu, Weimin
AU - Liu, Yifan
AU - Yu, Changyuan
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023/8
Y1 - 2023/8
N2 - In this paper, an optical sensor based on the fiber-diaphragm composite structure is proposed for detecting low-frequency acoustic waves. The main structure of the proposed sensor is built up by an in-line Mach-Zehnder interferometer (MZI) and a round polyethylene terephthalate (PET) diaphragm. The inline MZI is fabricated based on the sandwich structure of multimode fiber (MMF)-six holes single core fiber (SHSCF)-MMF. The interference dip intensity of the MZI can change linearly with the curvature variation. If the curvature sensor is stuck closely along the diameter of the PET diaphragm, this fiber-diagram composite structure can detect low-frequency acoustic waves because the sound field information is modulated to the curvature of the sensor by the vibration of the PET diaphragm. Then, by demodulating the light intensity with a photodetector, the original acoustic information can be obtained in real-time. The experimental results show that a flat response to sound waves is achieved in the frequency range from 50 Hz to 3000 Hz.
AB - In this paper, an optical sensor based on the fiber-diaphragm composite structure is proposed for detecting low-frequency acoustic waves. The main structure of the proposed sensor is built up by an in-line Mach-Zehnder interferometer (MZI) and a round polyethylene terephthalate (PET) diaphragm. The inline MZI is fabricated based on the sandwich structure of multimode fiber (MMF)-six holes single core fiber (SHSCF)-MMF. The interference dip intensity of the MZI can change linearly with the curvature variation. If the curvature sensor is stuck closely along the diameter of the PET diaphragm, this fiber-diagram composite structure can detect low-frequency acoustic waves because the sound field information is modulated to the curvature of the sensor by the vibration of the PET diaphragm. Then, by demodulating the light intensity with a photodetector, the original acoustic information can be obtained in real-time. The experimental results show that a flat response to sound waves is achieved in the frequency range from 50 Hz to 3000 Hz.
KW - acoustic wave
KW - light intensity demodulation
KW - polyethylene terephthalate diaphragm
KW - six holes single core fiber
UR - http://www.scopus.com/inward/record.url?scp=85182283630&partnerID=8YFLogxK
U2 - 10.1109/PGC60057.2023.10343833
DO - 10.1109/PGC60057.2023.10343833
M3 - Conference article published in proceeding or book
AN - SCOPUS:85182283630
T3 - Photonics Global Conference, PGC 2023
SP - 67
EP - 70
BT - Photonics Global Conference, PGC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 Photonics Global Conference, PGC 2023
Y2 - 21 August 2023 through 23 August 2023
ER -