Chinese Optics Letters, 2011, 9 (2): 022501, Published Online: Mar. 3, 2011
Observation of wedge waves and their mode transformation by laser ultrasonic technique Download: 650次
楔形波 色散 模态转变 激光超声 250.5530 Pulse propagation and temporal solitons 350.0350 Other areas of optics 350.7420 Waves
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.
Jing Jia, Zhonghua Shen, Lijuan Wang, Ling Yuan. Observation of wedge waves and their mode transformation by laser ultrasonic technique[J]. Chinese Optics Letters, 2011, 9(2): 022501.