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Proceedings Paper

Part-per-trillion level detection of SF6 using a single-mode fiber-coupled quantum cascade laser and a quartz enhanced photoacoustic sensor
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Paper Abstract

We will report here on the design and realization of optoacoustic sensors based on an external cavity QCL laser source emitting at 10,54 μm, fiber-coupled with a QEPAS spectrophone module. SF6 has been selected as the target gas. Single mode laser delivery through the prongs of the quartz tuning fork has been realized using a hollow waveguide fiber with internal core size of 300 μm. The achieved sensitivity of the system was 50 part per trillion in 1 s corresponding to a record for QEPAS normalized noise-equivalent absorption of 2,7•10-10 W•cm-1•Hz-1/2.

Paper Details

Date Published: 4 February 2013
PDF: 8 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310Z (4 February 2013); doi: 10.1117/12.2001638
Show Author Affiliations
V. Spagnolo, Univ. and Politecnico of Bari (Italy)
P. Patimisco, Univ. and Politecnico of Bari (Italy)
S. Borri, Univ. and Politecnico of Bari (Italy)
G. Scamarcio, Univ. and Politecnico of Bari (Italy)
Bruce E. Bernacki, Pacific Northwest National Lab. (United States)
Jason Kriesel, Opto-Knowledge Systems Inc. (United States)

Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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