Abstract
We report Tunable Diode Laser Spectroscopy measurements of propane using a recently developed 3.37 μm GaInAsSb/AlGaInAsSb DFB laser. We have demonstrated that Wavelength Modulation Spectroscopy can be utilized to enhance a sharp feature in the broader propane spectrum around 3370.4 nm. A minimum detectable concentration of 30 ppb×m was obtained at a response time of 0.5 s. This corresponded to a minimum detectable absorption of 8 × 10−5 which is why an improvement of the sensitivity by an order of magnitude is possible using this laser and a more optimized optical setup.
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Acknowledgement
This work has been funded by the European Commission in the frame of the FP7 project SensHy (grant No. 223998).
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Kluczynski, P., Lundqvist, S., Belahsene, S. et al. Detection of propane using tunable diode laser spectroscopy at 3.37 μm. Appl. Phys. B 108, 183–188 (2012). https://doi.org/10.1007/s00340-012-5054-1
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DOI: https://doi.org/10.1007/s00340-012-5054-1