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Kirjasto - Tampereen teknillinen yliopisto

Browsing Research publications by Author "Saarela, Jaakko"

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  • Manninen, Albert; Sand, Johan; Saarela, Jaakko; Sorvajärvi, Tapio; Toivonen, Juha; Hernberg, Rolf (2009)
    An electromechanical film, EMFi, is utilized as a transducer in a photoacoustic (PA) gas sensor. The film is a sensitive acoustic transducer, it is easily formable, and it exhibits a wide frequency response regardless of ...
  • Saarela, Jaakko; Sorvajärvi, Tapio; Laurila, Toni; Toivonen, Juha (2011)
    A photoacoustic (PA) sensor has been developed for the detection of nitrogen dioxide (NO2). Ten amplitude-modulated high-power light emitting diodes (LEDs), emitting a total optical power of 9W at 453 nm, are used to excite ...
  • Saarela, Jaakko; Sand, Johan; Sorvajärvi, Tapio; Manninen, Albert; Toivonen, Juha (2010)
    A novel multipass photoacoustic cell with five stacked electromechanical films as a microphone has been constructed, tested and characterized. The photoacoustic cell is an open rectangular structure with two steel plates ...
  • Saarela, Jaakko; Toivonen, Juha; Manninen, Albert; Sorvajärvi, Tapio; Hernberg, Rolf (2009)
    Different wavelength modulation waveforms were studied comprehensively in tunable diode laser photoacoustic spectroscopy. The generation of the photoacoustic signal was studied by way of simulations and experiments. A ...