منابع مشابه
Synchrotron infrared photoacoustic spectroscopy
The use of synchrotron radiation ~SR! as a farand mid-infrared source in the measurement of photoacoustic Fourier transform infrared spectra of solids is demonstrated for the first time in this work. Initial experiments were performed at beamline U10A at the National Synchrotron Light Source, Brookhaven National Laboratory. For synchrotron photoacoustic spectroscopy to be feasible, it must yiel...
متن کاملPulsed near-infrared photoacoustic spectroscopy of blood
The aim of this study was to use pulsed near infrared photoacoustic spectroscopy to determine the oxygen saturation (SO2) of a saline suspension of red blood cells in vitro. The photoacoustic measurements were made in a cuvette which formed part of a larger circuit through which the red blood cell suspension was circulated. Oxygen saturation of the red blood cell suspension was altered between ...
متن کاملEvanescent-wave photoacoustic spectroscopy with optical micro/nano fibers.
We demonstrate gas detection based on evanescent-wave photoacoustic (PA) spectroscopy with tapered optical fibers. Evanescent-field instead of open-path absorption is exploited for PA generation, and a quartz tuning fork is used for PA detection. A tapered optical fiber with a diameter down to the wavelength scale demonstrates detection sensitivity similar to an open-path system but with the ad...
متن کاملRemote mid-infrared photoacoustic spectroscopy with a quantum cascade laser.
We demonstrate non-contact remote photoacoustic spectroscopy in the mid-infrared region. A room-temperature-operated pulsed external-cavity quantum cascade laser is used to excite photoacoustic waves within a semitransparent sample. The ultrasonic waves are detected remotely on the opposite side of the sample using a fiber-optic Mach-Zehnder interferometer, thereby avoiding problems associated ...
متن کاملCharacterization of soils using photoacoustic mid-infrared spectroscopy.
This study investigates the use of photoacoustic spectroscopy (PAS) for rapid soil analysis. Photoacoustic spectroscopy requires very minimal sample preparation (air-drying), which is a major advantage compared to the more traditional transmittance technique, which requires time-consuming preparation of pellets. The amount of information contained in the PAS spectra appears to be similar to tha...
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ژورنال
عنوان ژورنال: Infrared Physics & Technology
سال: 2018
ISSN: 1350-4495
DOI: 10.1016/j.infrared.2018.07.030