Membrane-free All-fiber Acoustic Sensor

Abstract

Abstract: A membrane-free all fiber acoustic sensors based on a fiber-optic Fabry-Perot cavity is proposed and demonstrated. The acoustic response properties of the proposed sensor were exploited and the experimental results show that under the noise limit, the minimum acoustic pressure of the sensor can be detected approach to 38.9 . Meanwhile, the sensing probe has a good temperature stability benefiting from its all-fiber structure. Compared with the sensors based on the acoustic sensing diaphragm, our proposed sensor possesses a strong structure, easy to make and has good linear response to acoustic pressure, which implies that such sensors could be widely used as microphone in applications of high acoustic pressure fields.

Key words: fiber and waveguide optics, acoustic sensor, fabry-perot cavity, wavelength shift

WEI Chang1, WANG Yulian2, SHI Jinhui3, ZHANG Guosheng4 . Membrane-free All-fiber Acoustic Sensor[J]. Chinese Journal of Quantum Electronics.

References

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