In this paper, a fiber coupling method is presented lo analyze the fiber-op
tic velocity interferometric system for any reflector (optic VISAR) and the
system has been developed. Optic VISAR ts applied to measure the velocity
profile of a diffusely reflecting surface; the experimental results fit the
theory analyses fairly well. The oscillation on the velocity profile clear
ly shows a dispersion effect, which is the first to be obtained for such a
low shocking measurement by VISAR. (C) 1999 John Wiley & Sons, Inc.