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

V. Spagnolo; P. Patimisco; S. Borri; G. Scamarcio; Bruce E. Bernacki; Jason Kriesel

doi:10.1117/12.2001638

4 February 2013 Part-per-trillion level detection of SF₆ using a single-mode fiber-coupled quantum cascade laser and a quartz enhanced photoacoustic sensor

V. Spagnolo, P. Patimisco, S. Borri, G. Scamarcio, Bruce E. Bernacki, Jason Kriesel

Author Affiliations +

Proceedings Volume 8631, Quantum Sensing and Nanophotonic Devices X; 86310Z (2013) https://doi.org/10.1117/12.2001638
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

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V. Spagnolo, P. Patimisco, S. Borri, G. Scamarcio, Bruce E. Bernacki, and Jason Kriesel "Part-per-trillion level detection of SF₆ using a single-mode fiber-coupled quantum cascade laser and a quartz enhanced photoacoustic sensor", Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310Z (4 February 2013); https://doi.org/10.1117/12.2001638

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