THE EFFECT OF VIBRATION ON 2-WAVE MIXING IN A PHOTOREFRACTIVE CRYSTAL

We measured the signal beam intensity of two-wave mixing in a BaTiO3 c rystal which was subjected to a small vibration along the C-axis. The grating vector formed by the interference of the two beams was also al ong the same axis. The signal intensity as a function of vibration amp litude follows the prediction of a theory using a convolution of the v ibration pulse and the grating itself. This approach may provide a pro be to unveil various light-grating interaction mechanisms within photo refractive crystals.