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Optics Communications

Subpicosecond photon echoes by using nanosecond laser pulses

Hiroki Nakatsuka, Makoto Tomita, Masahiro Fujiwara, 修治 浅香

Published Nov 1, 1984• 63 citations
Publisher
DOI
10.1016/0030-4018(84)90301-8

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Processing of two-dimensional images on a nanosecond time scale is demonstrated using the stimulated photon echoes in a rare-earth-doped crystal (0.1 at. % Pr(3+):LaF(3)). Two spatially encoded laser pulses (pictures) resonant with the (3)P(0)-(3)H(4) transition of Pr(3+) were stored by focusing the image pulses sequentially into the Pr(3+):LaF(3) crystal. The stored information is retrieved and processed by a third read pulse, generating the echo that is the spatial convolution or correlation of the input images. Application of this scheme to high-speed pattern recognition is discussed.