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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 11, Iss. 11 — Nov. 1, 1994
  • pp: 2167–2174

Photorefractive two-beam-coupling nonlinear joint-transform correlator

Jehad Khoury, Mark Cronin-Golomb, Peter Gianino, and Charles Woods  »View Author Affiliations

JOSA B, Vol. 11, Issue 11, pp. 2167-2174 (1994)

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An all-optical nonlinear joint-transform correlator that is based on a square-law receiver has been implemented for the first time to our knowledge without the use of a spatial light modulator and digital processing in the Fourier plane. The correlator uses energy transfer from two-beam coupling in the Fourier plane. We implement compressional nonlinearity in the hard-clipped regime by pumping a weak plane wave with the intense joint spectrum of the reference and the signal images. Operation of this device rivals or exceeds that of the phase-only filter for detecting objects in cluttered noise. Experimental results are compared with both plane-wave and beam-propagation simulations.

© 1994 Optical Society of America

Jehad Khoury, Mark Cronin-Golomb, Peter Gianino, and Charles Woods, "Photorefractive two-beam-coupling nonlinear joint-transform correlator," J. Opt. Soc. Am. B 11, 2167-2174 (1994)

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