title: Diode laser-based photoacoustic spectroscopy with interferometrically-enhanced cantilever detection.
abstract: A novel sensitive approach to detect weak pressure variations has been applied to tunable diode laser-based photoacoustic spectroscopy. The sensing device consists of a miniature silicon cantilever, the deflection of which is detected with a compact Michelson-type interferometer. The photoacoustic system has been applied to the detection of carbon dioxide (CO2) at 1572 nm with a distributed feedback diode laser. A noise equivalent sensitivity of 2.8 x 10-10 cm-1WHz-1/2 was demonstrated. Potential improvements of the technique are discussed.
authors.forename: Toni
authors.initials: T
authors.lastname: Laurila
authors.forename: Heidi
authors.initials: H
authors.lastname: Cattaneo
authors.forename: Vesa
authors.initials: V
authors.lastname: Koskinen
authors.forename: Jyrki
authors.initials: J
authors.lastname: Kauppinen
authors.forename: Rolf
authors.initials: R
authors.lastname: Hernberg