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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 771Sub ppb CO Gas Measurement Using a Non Invasive...

Sub ppb CO Gas Measurement Using a Non Invasive QCL Laser Absorption Spectrometer Technique

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Abstract:

A sensitive gas detection system using a distributed feedback CW Quantum Cascade Laser (QCL) centered at 4610 nm as a radiation source has been developed. QCL was used in combination with an off-axis integrated cavity output spectroscopy (ICOS) for Carbon Monoxide (CO) gas detection in a low gas pressure. a 15 cm long high-finesse cavity with an effective optical path length of 400 m has been used as a sample gas cell. We demonstrated detection limit of 1 ppbv with less than 2 second averaging time. The best detection limit is obtained at 0.4 ppbv for a 128 s acquisition time. All measurement results has shown that the QCL based ICOS detector system proved to be suitable for monitoring CO gas in a low gas pressure condition with sub-ppb sensitivity.

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Periodical:

Applied Mechanics and Materials (Volume 771)

Pages:

133-136

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.771.133

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Online since:

July 2015

Authors:

Restu Widiatmono*, Julien Mandon, Frans J.M. Harren, Kusminarto Kusminarto, M. Ali Joko Wasono, Mitrayana Mitrayana

Keywords:

CO Gas Detection, ICOS, Non Invasive Method, QCL

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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