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Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection

We demonstrate a side-polished fiber-optic ultrasound sensor (SPFS) with a broad frequency bandwidth (dc–46 MHz at 6-dB reduction) and a wide amplitude detection range from several kPa to 4.8 MPa. It also exhibits a high acoustic sensitivity of 426 mV/MPa with a signal-to-noise ratio of 35 dB and a...

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Autores principales: Heo, Jeongmin, Lee, Kyu-Tae, Kim, Ryun Kyung, Baac, Hyoung Won
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358836/
https://www.ncbi.nlm.nih.gov/pubmed/30669420
http://dx.doi.org/10.3390/s19020398
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author Heo, Jeongmin
Lee, Kyu-Tae
Kim, Ryun Kyung
Baac, Hyoung Won
author_facet Heo, Jeongmin
Lee, Kyu-Tae
Kim, Ryun Kyung
Baac, Hyoung Won
author_sort Heo, Jeongmin
collection PubMed
description We demonstrate a side-polished fiber-optic ultrasound sensor (SPFS) with a broad frequency bandwidth (dc–46 MHz at 6-dB reduction) and a wide amplitude detection range from several kPa to 4.8 MPa. It also exhibits a high acoustic sensitivity of 426 mV/MPa with a signal-to-noise ratio of 35 dB and a noise-equivalent pressure of 6.6 kPa (over 1–50 MHz bandwidth) measured at 7-MHz frequency. The SPFS does not require multi-layer-coated structures that are used in other high-sensitivity optical detectors. Without any coating, this uses a microscale-roughened structure for evanescent-field interaction with an external medium acoustically modulated. Such unique structure allows significantly high sensitivity despite having a small detection area of only 0.016 mm(2) as a narrow line sensor with a width of 8 μm. The SPFS performance is characterized in terms of acoustic frequency, amplitude responses, and sensitivities that are compared with those of a 1-mm diameter piezoelectric hydrophone used as a reference.
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spelling pubmed-63588362019-02-06 Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection Heo, Jeongmin Lee, Kyu-Tae Kim, Ryun Kyung Baac, Hyoung Won Sensors (Basel) Article We demonstrate a side-polished fiber-optic ultrasound sensor (SPFS) with a broad frequency bandwidth (dc–46 MHz at 6-dB reduction) and a wide amplitude detection range from several kPa to 4.8 MPa. It also exhibits a high acoustic sensitivity of 426 mV/MPa with a signal-to-noise ratio of 35 dB and a noise-equivalent pressure of 6.6 kPa (over 1–50 MHz bandwidth) measured at 7-MHz frequency. The SPFS does not require multi-layer-coated structures that are used in other high-sensitivity optical detectors. Without any coating, this uses a microscale-roughened structure for evanescent-field interaction with an external medium acoustically modulated. Such unique structure allows significantly high sensitivity despite having a small detection area of only 0.016 mm(2) as a narrow line sensor with a width of 8 μm. The SPFS performance is characterized in terms of acoustic frequency, amplitude responses, and sensitivities that are compared with those of a 1-mm diameter piezoelectric hydrophone used as a reference. MDPI 2019-01-18 /pmc/articles/PMC6358836/ /pubmed/30669420 http://dx.doi.org/10.3390/s19020398 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Heo, Jeongmin
Lee, Kyu-Tae
Kim, Ryun Kyung
Baac, Hyoung Won
Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection
title Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection
title_full Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection
title_fullStr Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection
title_full_unstemmed Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection
title_short Side-Polished Fiber-Optic Line Sensor for High-Frequency Broadband Ultrasound Detection
title_sort side-polished fiber-optic line sensor for high-frequency broadband ultrasound detection
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358836/
https://www.ncbi.nlm.nih.gov/pubmed/30669420
http://dx.doi.org/10.3390/s19020398
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