Computational temporal ghost imaging

Abstract

Ghost imaging is a fascinating process, where light interacting with an\nobject is recorded without resolution, but the shape of the object is\nnevertheless retrieved, thanks to quantum or classical correlations of this\ninteracting light with either a computed or detected random signal. Recently,\nghost imaging has been extended to a time object, by using several thousands\ncopies of this periodic object. Here, we present a very simple device, inspired\nby computational ghost imaging, that allows the retrieval of a single\nnon-reproducible, periodic or non-periodic, temporal signal. The reconstruction\nis performed by a single shot, spatially multiplexed, measurement of the\nspatial intensity correlations between computer-generated random images and the\nimages, modulated by a temporal signal, recorded and summed on a chip CMOS\ncamera used with no temporal resolution. Our device allows the reconstruction\nof either a single temporal signal with monochrome images or\nwavelength-multiplexed signals with color images.\n