Multi-Path Ghost Imaging by Means of an Additional Time Correlation

Abstract

Ghost imaging functions achieved by means of the spatial correlations between two photons is a new modality in imaging systems. With a small number of photons, ghost imaging is usually realized based on the position correlation of photon pairs produced from the spontaneous parametric down-conversion process. Here we demonstrate a way to realize multi-path ghost imaging by introducing an additional time correlation. Different delays of paths will induce the shift of the coincidence peak, which carries the information about objects. By choosing the suitable coincidence window, we obtain images of three objects simultaneously, with a visibility of 87.2%. This method provides insights and techniques into multi-parameter ghost imaging. It can be applied to other correlated imaging systems, for example, quantum spiral imaging.

Joint Authentication Public Network Cryptographic Key Distribution Protocol Based on Single Exposure Compressive Ghost Imaging

“…Recently, a technique named ghost imaging (GI) has attracted much attention. This technique has undergone a revolution from doublearm detection optical paths [15][16][17][18][19] to single-arm detection optical paths, [20][21][22][23] the core of which is to use a programmable spatial light modulator to dispense with the reference arm in the double-arm scheme and recover the object image through the intensity correlation between the modulation patterns and bucket detector values. Singlearm GI is also known as computational ghost imaging (CGI).…”

Manipulating the Spatial Structure of Second-Order Quantum Coherence Using Entangled Photons

“…The spatial correlation of both quantum [26][27][28][29] and classical [30][31][32] light has been extensively explored, particularly in the correlated-photon imaging. [33][34][35][36][37][38][39] Furthermore, spatially structured entangled photons have been achieved by establishing entanglement in spatial degree of freedom (DOF), [40][41][42][43][44][45] for example, orbital angular mo-mentum (OAM) arising from a helical phase of exp(𝑗𝑚𝜙) (where 𝜙 is the azimuthal angle in the polar coordinates and the integer index 𝑚 indicates the topological charge).…”