期刊
IEEE PHOTONICS JOURNAL
卷 9, 期 3, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2017.2694480
关键词
Optical fiber sensor; Fabry-Perot interferometer (FPI); sensor fabrication; ultrasonic measurement
资金
- National Natural Science Foundation of China [61275088, 61505163, 61327012]
- Scientific Research Program funded by Shaanxi Provincial Education Department [08JZ58]
- Guangdong Youth Science and Technology Innovation Talents of China [2014TQ01X539]
- Guangdong Natural Science Foundation of China [2014A030313387]
- Guangzhou Key Collaborative Innovation Foundation of China [2016201604030084]
A miniature optical fiber ultrasonic sensor based on the Fabry-Perot interferometer (FPI) is proposed and experimentally demonstrated. The cavity of the interferometer is based on a section of hollow core fiber coated with a 353ND diaphragm. A well-define interference pattern is achieved, and the spectral sideband filter technique is used to interrogate the sensor. Because the thin reflective diaphragm is extremely sensitive to sound pressure, the signal-to-noise ratio of the sensor response reaches to 31.22 dB with the pulse ultrasonic excitation of 300 kHz. A clear interface information can be distinguished in physical model imaging, and the longitudinal spatial resolution is 5 mm. This proposed sensor has the advantages of being simple to fabricate, ultracompact in size, cost effective, corrosion resistance, and being highly stable.
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