期刊
OPTICS COMMUNICATIONS
卷 446, 期 -, 页码 77-83出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2019.04.071
关键词
Fiber optics; Resonator; Ultrasonic measurement
类别
资金
- National Natural Science Foundation of China (NSFC) [61605159]
- Natural Science Project of China University of Labor Relations [13YY026]
We propose a compact fiber-optic hydrophone and use it for acoustic wave measurements. The sensor probe comprises a microresonator formed by simply tying a tapered fiber into a loop structure. When the round-trip phase of light is an integer multiple of 2 pi, a well-defined resonance spectrum is produced by the resonator, with a quality factor as high as 10(4). Using spectral filtering technology for power interrogation, the steep linear resonance slope leads to sensitive operation of the sensor for high-frequency acoustic wave detection (of the order of several megahertz). After fabricating the sensor, the knot exhibits low-absorption loss underwater and, thus, the device can possibly be used as a hydrophone. The simple fabrication and small size structure of the sensor make it a good candidate for high-resolution scanning imaging.
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