Palm-Sized Laser Spectrometer with High ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Palm-Sized Laser Spectrometer with High Robustness and Sensitivity for Trace Gas Detection Using a Novel Double-Layer Toroidal Cell
Author(s) :
Feng, Shiling [Auteur]
Taiyuan University of Technology
Qiu, Xuanbing [Auteur]
Taiyuan University of Technology
Guo, Guqing [Auteur]
Taiyuan University of Technology
Zhang, Enhua [Auteur]
Taiyuan University of Technology
He, Qiusheng [Auteur]
Taiyuan University of Technology
He, Xiaohu [Auteur]
Taiyuan University of Technology
Ma, Weiguang [Auteur]
Taiyuan University of Technology
Fittschen, Christa [Auteur]
Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Li, Chuanliang [Auteur]
Taiyuan University of Technology
Taiyuan University of Technology
Qiu, Xuanbing [Auteur]
Taiyuan University of Technology
Guo, Guqing [Auteur]
Taiyuan University of Technology
Zhang, Enhua [Auteur]
Taiyuan University of Technology
He, Qiusheng [Auteur]
Taiyuan University of Technology
He, Xiaohu [Auteur]
Taiyuan University of Technology
Ma, Weiguang [Auteur]
Taiyuan University of Technology
Fittschen, Christa [Auteur]

Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522
Li, Chuanliang [Auteur]
Taiyuan University of Technology
Journal title :
Analytical Chemistry
Abbreviated title :
Anal. Chem.
Volume number :
93
Pages :
4552-4558
Publisher :
American Chemical Society (ACS)
Publication date :
2021-03-04
ISSN :
1520-6882
English keyword(s) :
palm-sized laser spectrometer
double-layer toroidal cell
near infrared spectroscopy
calibration-free scanned WMS
vibration and temperature environment tests
double-layer toroidal cell
near infrared spectroscopy
calibration-free scanned WMS
vibration and temperature environment tests
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
Physique [physics]/Physique [physics]
Chimie/Chimie théorique et/ou physique
Physique [physics]/Physique [physics]
Chimie/Chimie théorique et/ou physique
English abstract : [en]
A palm-sized laser spectrometer has been developed for detecting trace gases based on tunable diode laser absorption spectroscopy (TDLAS) in combination with a novel double-layer toroidal cell. With the benefit of a home-made ...
Show more >A palm-sized laser spectrometer has been developed for detecting trace gases based on tunable diode laser absorption spectroscopy (TDLAS) in combination with a novel double-layer toroidal cell. With the benefit of a home-made electronic system and compact optical design, the physical dimension of the sensor is minimized into 24×15×16 cm3. A toroidal absorption cell, with 84 reflections in 2 layers for an effective optical path length of 8.35 m, was used to enhance the absorption signals of gaseous species. A home-made electronic system was designed for implementing distributed feedback (DFB) diode laser controller, analog lock-in amplifier, data acquisition and communication. Calibration-free scanned wavelength modulation spectroscopy was employed to determine the concentration of the gas and reduce the random fluctuations from electronical noise and mechanical vibration. The measurement of CH4 in ambient air was demonstrated using a DFB laser at 1.653 μm. The rise time and fall time for renewing the gas mixture are approximately 16 s and 14 s, respectively. Vibration and temperature tests have been carried out for verifying the performance of the spectrometer, and standard deviations of 0.38 ppm and 0.11 ppm for 20 ppm CH4 at different vibration frequencies and temperatures, respectively, have been determined. According to the Allan deviation analysis, the minimum detection limit for CH4 can reach 22 ppb at an integration time of 57.8 s. Continuous measurement of atmospheric CH4 for two days validated the feasibility and robustness of our laser spectrometer, providing a promising laser spectral sensor for deploying in unmanned aerial vehicles or mobile robots.Show less >
Show more >A palm-sized laser spectrometer has been developed for detecting trace gases based on tunable diode laser absorption spectroscopy (TDLAS) in combination with a novel double-layer toroidal cell. With the benefit of a home-made electronic system and compact optical design, the physical dimension of the sensor is minimized into 24×15×16 cm3. A toroidal absorption cell, with 84 reflections in 2 layers for an effective optical path length of 8.35 m, was used to enhance the absorption signals of gaseous species. A home-made electronic system was designed for implementing distributed feedback (DFB) diode laser controller, analog lock-in amplifier, data acquisition and communication. Calibration-free scanned wavelength modulation spectroscopy was employed to determine the concentration of the gas and reduce the random fluctuations from electronical noise and mechanical vibration. The measurement of CH4 in ambient air was demonstrated using a DFB laser at 1.653 μm. The rise time and fall time for renewing the gas mixture are approximately 16 s and 14 s, respectively. Vibration and temperature tests have been carried out for verifying the performance of the spectrometer, and standard deviations of 0.38 ppm and 0.11 ppm for 20 ppm CH4 at different vibration frequencies and temperatures, respectively, have been determined. According to the Allan deviation analysis, the minimum detection limit for CH4 can reach 22 ppb at an integration time of 57.8 s. Continuous measurement of atmospheric CH4 for two days validated the feasibility and robustness of our laser spectrometer, providing a promising laser spectral sensor for deploying in unmanned aerial vehicles or mobile robots.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Research team(s) :
PhysicoChimie de l'Atmosphère (PCA)
Submission date :
2021-08-24T12:38:59Z
2021-08-30T08:34:55Z
2021-08-30T08:34:55Z
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