Multi-point acoustic impedance sensing based on enhanced forward stimulated Brillouin scattering

Ben Xiong; Xuelei Fu; Pengyu Zhang; Haokun Mi

doi:10.1117/12.2660949

16 December 2022 Multi-point acoustic impedance sensing based on enhanced forward stimulated Brillouin scattering

Ben Xiong, Xuelei Fu, Pengyu Zhang, Haokun Mi

Proceedings Volume 12500, Fifth International Conference on Mechatronics and Computer Technology Engineering (MCTE 2022); 125003K (2022) https://doi.org/10.1117/12.2660949
Event: 5th International Conference on Mechatronics and Computer Technology Engineering (MCTE 2022), 2022, Chongqing, China

Abstract

In recent years, the research on acoustic impedance sensing based on Forward Stimulated Brillouin Scattering (FSBS) has made great progress. Here, we propose a method of enhance excitation in multi-point frequency division multiplexing acoustic impedance detection based on FSBS. The external acoustic impedance of different fibers can be distinguished by specific frequency peaks in fibers with different diameters based on the fiber resonance center frequency determined by FSBS. Pulse-modulated light is used to make the pulsed light carry a specific resonance center frequency, so as to directionally enhance the excitation of the corresponding FSBS mode and achieve high-energy transmission. This experiment verifies that the sensor size of 0.6 m can complete the acoustic impedance sensing of multiple locations.

Citation Download Citation

Ben Xiong, Xuelei Fu, Pengyu Zhang, and Haokun Mi "Multi-point acoustic impedance sensing based on enhanced forward stimulated Brillouin scattering", Proc. SPIE 12500, Fifth International Conference on Mechatronics and Computer Technology Engineering (MCTE 2022), 125003K (16 December 2022); https://doi.org/10.1117/12.2660949

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KEYWORDS

Acoustics

Environmental sensing

Scattering

Modulation

Optical fibers

Light scattering

Optical filters

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