Bounding the outcome of a two-photon interference measurement using weak coherent states.

TitleBounding the outcome of a two-photon interference measurement using weak coherent states.
Publication TypeJournal Article
Year of Publication2018
AuthorsA Aragoneses, NT Islam, M Eggleston, A Lezama, J Kim, and DJ Gauthier
JournalOptics Letters
Volume43
Issue16
Start Page3806
Pagination3806 - 3809
Date Published08/2018
Abstract

The interference of two photons at a beam splitter is at the core of many quantum photonic technologies, such as quantum key distribution or linear-optics quantum computing. Observing high-visibility interference is challenging because of the difficulty of realizing indistinguishable single-photon sources. Here, we perform a two-photon interference experiment using phase-randomized weak coherent states with different mean photon numbers. We place a tight upper bound on the expected coincidences for the case when the incident wavepackets contain single photons, allowing us to observe the Hong-Ou-Mandel effect. We find that the interference visibility is at least as large as 0.995-0.013+0.005.

DOI10.1364/ol.43.003806
Short TitleOptics Letters