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Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements

An optical cavity-based sensor using a differential detection method has been proposed for point-of-care diagnostics. We developed a low-cost and portable optical cavity-based sensor system using a 3D printer and off-the-shelf optical components. In this paper, we demonstrate the sensing capability...

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Detalles Bibliográficos
Autores principales: Rho, Donggee, Breaux, Caitlyn, Kim, Seunghyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539703/
https://www.ncbi.nlm.nih.gov/pubmed/31083614
http://dx.doi.org/10.3390/s19092193
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author Rho, Donggee
Breaux, Caitlyn
Kim, Seunghyun
author_facet Rho, Donggee
Breaux, Caitlyn
Kim, Seunghyun
author_sort Rho, Donggee
collection PubMed
description An optical cavity-based sensor using a differential detection method has been proposed for point-of-care diagnostics. We developed a low-cost and portable optical cavity-based sensor system using a 3D printer and off-the-shelf optical components. In this paper, we demonstrate the sensing capability of the portable system through refractive index measurements. Fabricated optical cavity samples were tested using the portable system and compared to simulation results. A referencing technique and digital low pass filtering were applied to reduce the noise of the portable system. The measurement results match the simulation results well and show the improved linearity and sensitivity by employing the differential detection method. The limit of detection achieved was 1.73 × 10(−5) Refractive Index Unit (RIU), which is comparable to other methods for refractive index sensing.
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spelling pubmed-65397032019-06-04 Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements Rho, Donggee Breaux, Caitlyn Kim, Seunghyun Sensors (Basel) Article An optical cavity-based sensor using a differential detection method has been proposed for point-of-care diagnostics. We developed a low-cost and portable optical cavity-based sensor system using a 3D printer and off-the-shelf optical components. In this paper, we demonstrate the sensing capability of the portable system through refractive index measurements. Fabricated optical cavity samples were tested using the portable system and compared to simulation results. A referencing technique and digital low pass filtering were applied to reduce the noise of the portable system. The measurement results match the simulation results well and show the improved linearity and sensitivity by employing the differential detection method. The limit of detection achieved was 1.73 × 10(−5) Refractive Index Unit (RIU), which is comparable to other methods for refractive index sensing. MDPI 2019-05-12 /pmc/articles/PMC6539703/ /pubmed/31083614 http://dx.doi.org/10.3390/s19092193 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
Rho, Donggee
Breaux, Caitlyn
Kim, Seunghyun
Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements
title Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements
title_full Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements
title_fullStr Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements
title_full_unstemmed Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements
title_short Demonstration of a Low-Cost and Portable Optical Cavity-Based Sensor through Refractive Index Measurements
title_sort demonstration of a low-cost and portable optical cavity-based sensor through refractive index measurements
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539703/
https://www.ncbi.nlm.nih.gov/pubmed/31083614
http://dx.doi.org/10.3390/s19092193
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