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Proceedings Paper

Software-defined laser ultrasonics: non-destructive testing
Author(s): Klaus Hass; Lucas M. Riobo; Gerardo Gonzalez; Francisco E. Veiras; Fernando Perez-Quintian
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Paper Abstract

In this work we propose and implement the use of software defined optical interferometry for the development of laser ultrasound non-destructive testing. The interferometer is conceived as an optoelectronic system that can be controlled by software. The system itself consists of five interconnected blocks: an optical system (a heterodyne interferometer), an Electrical-Optical block (a laser + an acousto-optic modulator), an Optical-Electrical block (a balanced photodetector), a software defined hardware (a software defined radio platform), and a programmable controller (a personal computer). In particular, the selected software defined hardware includes a field programmable radio frequency transceiver. On the one hand, it can synthesize the stimulus signals for the acousto-optic modulator which splits the reference and test beams. On the other hand, it can process the photo-detected high-frequency signals accordingly. This software defined radio platform not only simplifies the experimental scheme but also has such a high sensibility that provides a wide dynamic range. In order to show the performance of the system for non-destructive testing, we analyze the signals produced on aluminium plates to detect flaws in weld seams.

Paper Details

Date Published: 9 September 2019
Proc. SPIE 11105, Novel Optical Systems, Methods, and Applications XXII, 111050D (9 September 2019); doi: 10.1117/12.2538500
Show Author Affiliations
Klaus Hass, Univ. de Buenos Aires (Argentina)
Lucas M. Riobo, Univ. de Buenos Aires (Argentina)
Gerardo Gonzalez, Univ. Nacional del Comahue (Argentina)
Francisco E. Veiras, Univ. de Buenos Aires (Argentina)
Fernando Perez-Quintian, Univ. Nacional del Comahue (Argentina)

Published in SPIE Proceedings Vol. 11105:
Novel Optical Systems, Methods, and Applications XXII
Cornelius F. Hahlweg; Joseph R. Mulley, Editor(s)

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