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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 21 — Nov. 1, 2001
  • pp: 1666–1668

High-frame-rate joint Fourier-transform correlator based on Sn2P2S6 crystal

R. Ryf, G. Montemezzani, P. Günter, A. A. Grabar, I. M. Stoika, and Yu. M. Vysochanskii  »View Author Affiliations


Optics Letters, Vol. 26, Issue 21, pp. 1666-1668 (2001)
http://dx.doi.org/10.1364/OL.26.001666


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Abstract

We present a joint Fourier-transform correlator working at a 10-kHz repetition rate. It is based on a photorefractive Sn2P2S6 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 100μJ/cm2 results in a buildup of thin dynamic holograms to a typical diffraction efficiency of 10-4 in a time of ~1μs and decay again in less than 10μs . 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 America

OCIS Codes
(100.1160) Image processing : Analog optical image processing
(100.4550) Image processing : Correlators
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(200.4560) Optics in computing : Optical data processing

Citation
R. Ryf, G. Montemezzani, P. Günter, A. A. Grabar, I. M. Stoika, and Yu. M. Vysochanskii, "High-frame-rate joint Fourier-transform correlator based on Sn2P2S6 crystal," Opt. Lett. 26, 1666-1668 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-21-1666

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