We present a joint Fourier-transform correlator working at a 10-kHz repetition rate. It is based on a photorefractive crystal operated in the pulsed direct band-to-band photoexcitation regime at a wavelength of 532 nm and a pulse length of 50 ns. The intersection of two plane waves with a total pulse fluence of results in a buildup of thin dynamic holograms to a typical diffraction efficiency of in a time of and decay again in less than . The correlator was tested by a fast image sequence generated by the pulsed readout of a holographic memory system. Successful correlation at a rate of 10 kHz has already been achieved for a pulse energy of only 200 nJ in the template images.
© 2001 Optical Society of AmericaFull Article | PDF Article
N. J. Cook, A. Carnicer, S. Vallmitjana, I. Juvells, C. M. Cartwright, and W. A. Gillespie
J. Opt. Soc. Am. B 15(7) 1977-1984 (1998)
M. Duelli, A. R. Pourzand, N. Collings, and R. Dändliker
Opt. Lett. 22(2) 87-89 (1997)
P. Bernasconi, G. Montemezzani, M. Wintermantel, I. Biaggio, and P. Günter
Opt. Lett. 24(4) 199-201 (1999)