Performance comparison of ferroelectric liquid-crystal-technology-based coherent optical multichannel correlators

Gilles Keryer (1) , J. L. de Bougrenet de La Tocnaye , Ayman Alfalou (1)

1 L@BISEN - Laboratoire ISEN

Our purpose is to compare two architectures when implemented with ferroelectric liquid-crystal technology: the conventional VanderLugt and joint transform correlators. The architectures are compared in the single-correlation and multichannel cases. The analysis covers both theoretical aspects and practical considerations regarding implementation. Specifications for a multichannel correlator design, including considerations of both spatial light modulators and architecture configurations, are discussed. Experimental results are presented for both architectures. Finally, the benefit resulting from extension to multichannel operation is discussed in terms of both multiplexing and algorithmic capabilities

Mots clés: Signal Processing; Image Processing; Opto-electronic; Encoding/Decoding; Compression; Decompression; encryption; Independent Components Analyses (ICA); Optical correlation; recognition forms; Information Processing; Diffractive optics; Digital Holography; Fourier transform; polarized light; Composite filter; POF; VLC; JTC

Domaines: Optique / photonique; Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Gilles Keryer, J. L. de Bougrenet de La Tocnaye, Ayman Alfalou. Performance comparison of ferroelectric liquid-crystal-technology-based coherent optical multichannel correlators. Applied optics, 1997, 36 (14), pp.3034-3055. ⟨hal-00517825⟩