Fiberized Sagnac Interferometer for Ultrasound Measurement
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
Laser-based ultrasonics (LBU), i.e. the generation of ultrasound by laser illumination and the measurement of ultrasonic signals by laser interferometric techniques, has many advantages for applications to nondestructive evaluation (NDE). These include non-contact generation and detection, remote placement of equipment using fiber-optics, easy scanning, absolute displacement calibration, both broad band-and narrow band signal generation, wide frequency band measurements, and applicability to curved surfaces. Both laser generation of ultrasound and the subsequent detection of the ultrasonic waves using a laser interferometry are areas of active research [1-6].