Abstract
Optical detection of ultrasound presents several advantages over conventional ultrasonic techniques; performed without contact and at a distance it can be used to probe parts at elevated temperature, in particular on a production line, and parts of complex shape. However, optical techniques are typically less sensitive than conventional piezoelectric-based techniques1. Hence, efforts have been done to improve the sensitivity of optical techniques while maintaining their useful features such as a large detection bandwidth.
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Blouin, A. et al. (1998). Optical Detection of Ultrasound using Two-Wave Mixing in Semiconductor Photorefractive Crystals and Comparison with the Fabry-Perot. In: Green, R.E. (eds) Nondestructive Characterization of Materials VIII. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4847-8_3
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DOI: https://doi.org/10.1007/978-1-4615-4847-8_3
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