Optical signal processing using spatiotemporal dynamic system with spatial light modulator

Generation and processing of optical patterns in the optical feedback system composed of an optically addressable spatial light modulator and a two-dimensional optical feedback including a spatial frequency filter are demonstrated. The fringe pattern, which is generated by using a single slit, is used in order to estimate the spatial property of the system. An image made of circular isolated spots generated using a low-cut spatial frequency filter could be formed and memorized at the desired position by an external control light under both in-focusing condition and out-of-focusing condition of the optical feedback. Self-scanning isolated spots resulted from unisotropic transverse interactions memorize a spatiotemporal binary image and provide a delay line for them. Furthermore we demonstrate that the optical feedback system controlled by the spatial frequency filter generated in the optoelectronic feedback system performs a dynamic pattern generation.