, Volume 108, Issue 1, pp 183-188
Date: 13 Jul 2012

Detection of propane using tunable diode laser spectroscopy at 3.37 μm

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


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.