This paper shows the application of waveguide hologram in optical matched filtering. Waveguide holograms of one- and two-dimensional images were formed in two-layer waveguides. A 6000 A thin As-S film was used as a recording medium. The diffraction efficiency of waveguide Fburier hologram was about 30%. No schemes of optical correlators were studied experimentally.
"Waveguide Holograms For Matched Filtering Systems", Proc. SPIE 0754, Optical and Digital Pattern Recognition, (21 August 1987); doi: 10.1117/12.939965; https://doi.org/10.1117/12.939965