Optical measurements of the laser-inducedultrasonic waves on moving objects.
We performed a single-shot, contactless measurement of ultrasonic waves on a laser-propelled rod with a homodyne quadrature laser interferometer (HQLI) during the entire duration of its motion. This is the first such experimental demonstration of the laser-induced motion of an elastic body where the most important mechanisms that reveal the nature of its motion are presented and explained. Furthermore, these measurements quantitatively demonstrate that the HQLI is an appropriate tool for monitoring high-amplitude (1.3 microm) and high-frequency (200 MHz) ultrasonic waves on moving objects. The applicability of the HQLI can also be extended to measure other optodynamic and high-frequency transient phenomena with a constant sensitivity and a resolution below 1 nm.
Pozar
Tomaz
T
Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia. tomaz.pozar@fs.uni-lj.si
Gregorcic
Peter
P
Mozina
Janez
J
D004735:Energy Transfer; D004867:Equipment Design; D007368:Interferometry / Q000295:instrumentation*; D007834:Lasers; D008846:Micromanipulation / Q000379:methods*; D052898:Optical Tweezers; D013314:Stress, Mechanical; D014465:Ultrasonics