Laser ultrasonic (LUS) receivers based
on photorefractive (PR) materials are contactless and adap- tive
interferometers, which are used widely for materials characterization. Here, we
present a simple LUS interferometer at 532 nm operating wavelength based on
organic PR polymer composites (PVK/ECZ/C60) doped with the nonlinear
chromophore 4-[4-(diethylamino)-2-hydroxyben- zylideneamino] benzonitrile (Dc).
A picoseconds laser at 1064 nm wavelength is used to generate ultrasound pulses
in aluminum plates and by using this LUS polymer interferometer, detection of these ultrasound waves is remotely performed at the surface of the specimens. The LUS sensor is used to determine
the thickness of aluminum plates about 0.25 mm, 3 mm and 10 mm. We also show
the potential of this polymer receiver for detection of an artificial defect in
a metal sample.
Cite this paper
Zamiri, S. , Reitinger, B. , Rodríguez-Rivera, M. , Ramos-Ortíz, G. , Burgholzer, P. , Bauer, S. and Maldonado, J. (2015). Employing 532 nm Wavelength in a Laser Ultrasound Interferometer Based on Photorefractive Polymer Composites. Open Access Library Journal, 2, e1247. doi: http://dx.doi.org/10.4236/oalib.1101247.
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