Trace gas sensor based on quartz tuning fork enhanced laser photoacoustic spectroscopy

A compact photoacoustic gas sensor based on a quartz tuning fork and fiber-coupled distributed feedback (DFB) diode laser for detection of trace gas at atmospheric pressure has been developed. The sensor performance was evaluated by detection of water vapor in ambient air at normal atmospheric press...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2009-03, Vol.94 (3), p.527-533
Main Authors: Liu, K., Li, J., Wang, L., Tan, T., Zhang, W., Gao, X., Chen, W., Tittel, F. K.
Format: Article
Language:English
Subjects:
Atmospheric pressure
Barometric pressure
Biological and medical applications
Engineering
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gas sensors
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Laser spectroscopy
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Quartz
Semiconductor lasers
laser diodes
Sensors
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Tuning
Water vapor
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Summary:A compact photoacoustic gas sensor based on a quartz tuning fork and fiber-coupled distributed feedback (DFB) diode laser for detection of trace gas at atmospheric pressure has been developed. The sensor performance was evaluated by detection of water vapor in ambient air at normal atmospheric pressure. A normalized noise equivalent absorption coefficient of 1.68×10 −8  cm −1  W/Hz 1/2 was achieved. Influence of different acoustic microresonators and sample pressure on the sensor performance, and the characterization of the sensor response time were investigated. Approaches to improve the current sensor performance are discussed.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-008-3233-x