Frequency characteristics of a semi-closed structure in a guided-wave optical pressure sensor for detection of tsunami formation: investigation based on numerical simulations and experiments

Taiju Triyama; Hana Ono; Naoto Takaoka; Masashi Ohkawa

doi:10.1117/12.2541707

2 March 2020 Frequency characteristics of a semi-closed structure in a guided-wave optical pressure sensor for detection of tsunami formation: investigation based on numerical simulations and experiments

Taiju Triyama, Hana Ono, Naoto Takaoka, Masashi Ohkawa

Author Affiliations +

Proceedings Volume 11274, Physics and Simulation of Optoelectronic Devices XXVIII; 112741P (2020) https://doi.org/10.1117/12.2541707
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Our group is developing a guided-wave optical pressure sensor to detect minute pressure fluctuations occurring during tsunami formation. The sensor consists of a diaphragm as a pressure-sensitive structure and a semi-closed structure with a small hole under the diaphragm which provides a unique high-pass filter function. Cutoff frequency of the high-pass characteristic is an important factor to detect pressure fluctuations due to tsunami formation. In this study, investigations were carried out on frequency characteristics and cutoff frequencies, which vary according to the semiclosed structure dimensions and pressure vibration amplitude, by numerical simulations and experiments in order to further establish design details of the sensor

Citation Download Citation

Taiju Triyama, Hana Ono, Naoto Takaoka, and Masashi Ohkawa "Frequency characteristics of a semi-closed structure in a guided-wave optical pressure sensor for detection of tsunami formation: investigation based on numerical simulations and experiments", Proc. SPIE 11274, Physics and Simulation of Optoelectronic Devices XXVIII, 112741P (2 March 2020); https://doi.org/10.1117/12.2541707

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