Authors: Saeid Zamiri Bernhard Reitinger Engelbert Portenkirchner Thomas Berer Enrique FontSanchis Peter Burgholzer Niyazi Serdar Sariciftci Siegfried Bauer Fernando FernándezLázaro
Publish Date: 2013/07/07
Volume: 114, Issue: 4, Pages: 509-515
Abstract
We present two laser ultrasonic receivers based on organic photorefractive polymer composites with 24bis2methoxyethylaminobenzylidenemalononitrile AODCST or 2dicyanomethylen3cyano55dimethyl44′dihexylaminophenyl25dihydrofuran nonlinear optical chromophores Experimental results show sensitivities of the ultrasonic receivers of ~95 × 10−8 nm W/Hz05 for both composites and a faster response time ~60 ms for the AODCSTbased laser ultrasonic receiver We show that such LUS detectors are highly suitable for contactless thickness measurements of aluminum steel sheets and defect detection with an accuracy of 100 μmThis work has been supported by the Christian Doppler Research Association the KProject for NonDestructive Testing and Tomography supported by the COMETProgram of the Austrian Research Promotion Agency FFG Grant No 820492 the European Regional Development Fund EFRE in the framework of the EUprogram Regio 13 and the federal state of Upper Austria We are also indebted to Spanish MINECO and Comunidad Valenciana for funding projects CTQ201020349 and PROMETEO/2012/010
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