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Sensors (Basel). 2018 Dec 12;18(12). pii: E4393. doi: 10.3390/s18124393.

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

Author information

1
Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil. sully@puc-rio.br.
2
Ouro Negro SA, Rua General Argolo 61, 20921-394 Rio de Janeiro, Brazil. luiz.guedes@ouronegro.com.br.
3
Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil. mspgomes@puc-rio.br.
4
Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil. hugomes@puc-rio.br.
5
Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, Brazil. bcarolid@aluno.puc-rio.br.
6
Petrobras Research and Development Center (CENPES), 21941-915 Rio de Janeiro, Brazil. morikawa@petrobras.com.br.

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.

KEYWORDS:

carbon dioxide monitoring; fiber bragg grating; gas sensor; photonic crystal fiber; tunable laser

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