期刊
SENSORS
卷 18, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/s18124393
关键词
gas sensor; photonic crystal fiber; tunable laser; fiber bragg grating; carbon dioxide monitoring
资金
- Petrobras [TCBR 304]
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 mu m 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.
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