Amplitude versus frequency characteristic of a photorefractive crystal
Zel'dovich B. Ya. , Il'inykh P. N. , Podoshvedov S. A.
Two waves, one of which is reflected from a moving object and is frequency shifted, interfere in a photorefractive BiI2Ti02o crystal. It is found that at frequencies ranging from 0 to 110 Hz the amplitude of the recorded hologram is a continuous function of the frequency difference between the interacting waves. © 1995 American Institute of Physics.