Compact carbon dioxide sensor using tunable diode laser absorption spectroscopy for capnographic monitoring

In order to realize real-time capnographic monitoring, a compact carbon dioxide sensor based on tunable diode laser spectroscopy technology was developed by means of a 2004 nm distributed feedback laser and a circular gas cell. The toroidal cell can achieve an optical path length of 3.49 m in a volu...

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Bibliographic Details
Published inSpectroscopy letters Vol. 55; no. 3; pp. 183 - 191
Main Authors Li, Jinyi, Cheng, Xinyu, Tian, Xinli, Zhao, Hang, Li, Lianhui
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 16.03.2022
Taylor & Francis Ltd
Subjects
Capnography
Carbon dioxide
carbon dioxide monitoring
circular gas cell
Distributed feedback lasers
Laser spectroscopy
Lasers
Monitoring
Pneumothorax
Semiconductor lasers
Sensors
Spectrum analysis
tunable diode laser absorption spectroscopy
Tunable lasers
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Summary:In order to realize real-time capnographic monitoring, a compact carbon dioxide sensor based on tunable diode laser spectroscopy technology was developed by means of a 2004 nm distributed feedback laser and a circular gas cell. The toroidal cell can achieve an optical path length of 3.49 m in a volume of 38 ml, which enables the tunable diode laser spectroscopy carbon dioxide sensor to achieve a detection limit of 175 ppm at a measurement rate of 12.5 Hz. The actual exhaled carbon dioxide gas detection experiments were implemented, including the breath analysis of a normal subject under different conditions and another subject with pneumothorax. It indicates that the sensor has good effectiveness and practicability for carbon dioxide metabolic monitoring and related disease diagnosis.
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ISSN:0038-7010
1532-2289
DOI:10.1080/00387010.2022.2041672