Generation of transient gratings in weakly absorbing liquids with a high-power laser gives rise to changes in the fluid’s index of refraction that are sufficiently large to produce both multiple diffraction of a probe laser beam and a time response anomaly. The coupled-wave approach to the solution of the volume diffraction problem is shown to predict the existence of high-order diffraction of the probe beam and the time dependence of the diffraction intensity of each order. In addition, criteria for the Raman–Nath and Bragg diffraction regimes are derived from the first-order, coupled-wave equations.
© 1999 Optical Society of America
Huxiong Chen and Gerald Diebold, "Diffraction of light from phase gratings at large modulation depths: transient-grating experiments in liquids at high laser powers," Opt. Lett. 24, 211-213 (1999)