Independent telecom-fiber sources of quantum indistinguishable single photons
Monika Patel, Joseph B. Altepeter, Yu-Ping Huang, Neal N. Oza, Prem Kumar · New Journal of Physics · 2014
Quantum-mechanically indistinguishable photons produced by independent (or equivalently, mutually phase incoherent) light sources are essential for distributed quantum information processing applications. We demonstrate heralded generation of such photons in two spatially separate telecom-fiber spools, each driven by pulsed pump waves that are measured to have no mutual phase coherence. Through Hong–Ou–Mandel experiments, we measure the quantum interference visibility of those photons to be . Our experimental results are well predicted by a quantum multimode theory we developed for such systems without the need for any fitting parameter.