Electrically controlled optical spectral filters for WDM communication networks based on multilayer inhomogeneous holographic diffraction structures

This paper presents the diffraction characteristics of multilayer diffraction structures formed by the holographic method in photopolymerization compositions with a high concentration of nematic liquid crystals, when controlled by external electrical action. The results demonstrate the possibility to use multilayer holographic diffraction structures as a basic element for electrically controlled optical spectral filters for wavelength-division multiplexing communication networks.