Abstract
A compact and sensitive photoacoustic setup has been developed based on a recently demonstrated cantilever technique. A micromechanical cantilever transducer is attached to a cylindrical photoacoustic cell and the cantilever’s deflection is monitored with a compact Michelson interferometer. A commercial 1-Watt optical fiber amplifier was used to enhance the performance of the system. A normalized sensitivity of 1.4×10-10 cm-1 W Hz-1/2 was achieved in the detection of carbon dioxide at 1572 nm wavelength. Using 34 mW optical power from a DFB diode laser, the noise-equivalent detection limit for carbon dioxide at this wavelength is 4.0 ppm. Employing the fiber amplifier, we improved the sensitivity to yield measurement of sub-ppm concentrations.
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42.62.Fi; 42.55.Px; 82.80.Ch
An erratum to this article can be found at http://dx.doi.org/10.1007/s00340-006-2208-z
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Laurila, T., Cattaneo, H., Pöyhönen, T. et al. Cantilever-based photoacoustic detection of carbon dioxide using a fiber-amplified diode laser. Appl. Phys. B 83, 285–288 (2006). https://doi.org/10.1007/s00340-005-2106-9
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DOI: https://doi.org/10.1007/s00340-005-2106-9