Abstract
Wedge waves (WWs) in wedges, including their dispersion characteristics and
mode transformation, are investigated using the laser ultrasound technique. Pulsed
laser excitation and optical deflection beam method for detection are used to record
WWs. Numerous WWs are detected by scanning the excitation laser along the wedge tip.
Dispersions of WWs are obtained by using the two-dimensional (2D) Fourier
transformation method, and different WW orders are revealed on the wedges. Mode
transformation is determined by fixing the distance between the excitation and
detection position, as well as by scanning the samples along the normal direction of
the wedge tip.
© 2011 Chinese Optics Letters
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