All-fiber ultrasound sensor array implemented by swept frequency interferometry

Haniel Gabai; Idan Steinberg; Lihi Shiloh; Avishay Eyal

doi:10.1117/12.2194586

28 September 2015 All-fiber ultrasound sensor array implemented by swept frequency interferometry

Haniel Gabai, Idan Steinberg, Lihi Shiloh, Avishay Eyal

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963416 (2015) https://doi.org/10.1117/12.2194586
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

Fiber ultrasound (US) sensing is gaining popularity in recent years. Unique characteristics such as immunity to electromagnetic interference and embedding compatibility makes them advantageous in many applications. Multiplexing of US fiber sensors, however, remains a challenge. Here, a new multiplexing approach is introduced. Based on Swept Frequency Interferometry (SFI), it enables practical multiplexing of tens of US sensors. For demonstration, a 3-sensors setup was excited by ultrasound tone-bursts. While using low driving voltage (2.5-10V vs. ~100-400V in similar studies) and not implementing acoustic-impedance optimization or optical-resonance sensitivity enhancement, the sensors detected the excitation with high SNR (~25dB).

Citation Download Citation

Haniel Gabai, Idan Steinberg, Lihi Shiloh, and Avishay Eyal "All-fiber ultrasound sensor array implemented by swept frequency interferometry", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963416 (28 September 2015); https://doi.org/10.1117/12.2194586

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