Software-defined laser ultrasonics: non-destructive testing

Klaus Hass; Lucas M. Riobo; Gerardo Gonzalez; Francisco E. Veiras; Fernando Perez-Quintian

doi:10.1117/12.2538500

9 September 2019 Software-defined laser ultrasonics: non-destructive testing

Klaus Hass, Lucas M. Riobo, Gerardo Gonzalez, Francisco E. Veiras, Fernando Perez-Quintian

Proceedings Volume 11105, Novel Optical Systems, Methods, and Applications XXII; 111050D (2019) https://doi.org/10.1117/12.2538500
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Klaus Hass, Lucas M. Riobo, Gerardo Gonzalez, Francisco E. Veiras, and Fernando Perez-Quintian "Software-defined laser ultrasonics: non-destructive testing", Proc. SPIE 11105, Novel Optical Systems, Methods, and Applications XXII, 111050D (9 September 2019); https://doi.org/10.1117/12.2538500

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