title: Quartz enhanced photoacoustic spectroscopy with a 3.38 μm antimonide distributed feedback laser.
abstract: A system for gas sensing based on the quartz-enhanced photoacoustic spectroscopy technique has been developed. It makes use of a quantum well distributed feedback (DFB) laser diode emitting at 3.38 μm. This laser emits near room temperature in the continuous wave regime. A spectrophone, consisting of a quartz tuning fork and two steel microresonators were used. Second derivative wavelength modulation detection is used to perform low concentration measurements. The sensitivity and the linearity of the Quartz enhanced photoacoustic spectroscopy (QEPAS) sensor were studied. A normalized noise equivalent absorption coefficient of 4.06×10(-9) cm(-1)·W/Hz(1/2) was achieved.
authors: Institut d’Electronique du Sud (IES), UMR CNRS 5214, CC067, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier, cedex 05, France.
authors: Mohammad
authors: M
authors: Jahjah
authors: Sofiane
authors: S
authors: Belahsene
authors: Lars
authors: L
authors: Nähle
authors: Marc
authors: M
authors: Fischer
authors: Johannes
authors: J
authors: Koeth
authors: Yves
authors: Y
authors: Rouillard
authors: Aurore
authors: A
authors: Vicet