TRANSIENT MECHANICAL DISPLACEMENTS
D. Royer, E. Dieulesaint, M. Curie · 1986
Our compact heterodyne optical interferometer used for measuring harmonic displacements as low as lO+X in a one Hertz by the addition of a wide bandwidth electronic circuitry. This makes it suitable for measuring transient mechanical displacements. The results presented concern the mechanical impulse response of bulk and surface wave piezoelectric transducers and the detection of mechanical displacements generated in a metallic p late byDa YAG laser pulse. The sensitivity achieved is0.4A in a bandwidth of 50 MHz. bandwidth has been modified