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Sensors 2018, 18(12), 4393; https://doi.org/10.3390/s18124393

All-Fiber CO2 Sensor Using Hollow Core PCF Operating in the 2 µm Region

1
Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil
2
Ouro Negro SA, Rua General Argolo 61, 20921-394 Rio de Janeiro, Brazil
3
Petrobras Research and Development Center (CENPES), 21941-915 Rio de Janeiro, Brazil
*
Author to whom correspondence should be addressed.
Received: 30 October 2018 / Revised: 3 December 2018 / Accepted: 5 December 2018 / Published: 12 December 2018
(This article belongs to the Special Issue Optical Sensors Using Microstructured and Photonics Crystal Fibers)
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Abstract

A realistic implementation of an all-fiber CO2 sensor, using 74 cm of hollow core photonic crystal fiber (HC-PCF) as the cavity for light/gas interaction, has been implemented. It is based on CO2 absorbance in the 2 µm region. The working range is from 2% to 100% CO2 concentration at 1 atm total pressure and the response time obtained was 10 min. Depending on the concentration level, the sensor operates at one of three different wavelengths (2003.5 nm, 1997.0 nm and 1954.5 nm) to maintain a high sensitivity across all the working range. View Full-Text
Keywords: gas sensor; photonic crystal fiber; tunable laser; fiber bragg grating; carbon dioxide monitoring gas sensor; photonic crystal fiber; tunable laser; fiber bragg grating; carbon dioxide monitoring
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mejia Quintero, S.M.; Guedes Valente, L.C.; De Paula Gomes, M.S.; Gomes da Silva, H.; Caroli de Souza, B.; Morikawa, S.R.K. All-Fiber CO2 Sensor Using Hollow Core PCF Operating in the 2 µm Region. Sensors 2018, 18, 4393.

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