Abstract

An off-axis holographic recording method for fast-moving objects that has a time resolution of several picoseconds and a large depth of field is suggested. Two different but mutually coherent laser pulses, the original pulse (20 ps) and a stretched pulse (60 ps), are interfered. The short pulse determines the resolution, and the stretched pulse increases the field depth. Interference patterns between the short and the expanded pulses, for λ = 1.064 µm and λ = 0.532 µm, are demonstrated.

© 2000 Optical Society of America

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