Generation of correlated photons via four-wave mixing in optical fibres

Abstract

Correlated photons have been used in quantum optics for the generation of squeezed light, demonstration of quantum interference effects, quantum cryptography, Einstein-Podolsky-Rosen experiments and most recently, quantum teleportation. Usually, they are generated using chi ((2)) parametric processes to take advantage of large chi ((2)) nonlinearities and to wavelength separate the correlated photons from the pump photons. Here, we examine the generation of correlated photons using chi ((3)) parametric processes in optical fibres. We show that using such processes provides a simple and inexpensive correlated photon source readily compatible with communications technologies.