Optical Fiber Photonic Crystal Hydrophone for Cellular Acoustic Sensing

This paper describes the design, characterization, and testing of a compact hydrophone capable of measuring acoustic signals from cardiomyocytes. Our hydrophone consists of a nanofabricated photonic-crystal diaphragm externally-mounted to the facet of an optical fiber to form a pressure-sensitive Fa...

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Veröffentlicht in:IEEE access 2021, Vol.9, p.42305-42313
Hauptverfasser: Lorenzo, Simon, Wong, Yu-Po, Solgaard, Olav
Format: Artikel
Sprache:eng
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Zusammenfassung:This paper describes the design, characterization, and testing of a compact hydrophone capable of measuring acoustic signals from cardiomyocytes. Our hydrophone consists of a nanofabricated photonic-crystal diaphragm externally-mounted to the facet of an optical fiber to form a pressure-sensitive Fabry-Pérot cavity. Our hydrophone can operate in small liquid volumes less than 5 mm deep and incorporates a microchannel to vent air during immersion. The venting channel is designed to optimize bandwidth and sensitivity. Modeling and experimental results in water show a bandwidth from 50 Hz to 18 kHz and a minimum detectable pressure of 3~\mu Pa/ \sqrt {Hz} . We demonstrate the sensitivity to simulated bio-acoustic sources with nanometer-scale displacements.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3066150