Observing pattern dynamics in nonlinear optical systems using the video-sampling method

We present a method of synchronizing a shutter for a video camera that allo ws an instantaneous slow-motion visualization of fast repetitive processes with a time scaling factor of up to 1,000,000 or more. The method uses stan dard, unmodified CCIR or EIA video equipment, including video cassette reco rders for low-cost recording. A number of examples showing spatio-temporal dynamics in nonlinear optical systems is shown, including magneto-optical b eam-splitting, drifting hexagons and phase synchronization of coupled solid -state lasers. (C) 1999 Elsevier Science Ltd. All rights reserved.