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Hong-Ou-Mandel interference with a diode-pumped 1-GHz Ti:sapphire laser

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posted on 2023-02-16, 17:01 authored by Imogen Morland, Hanna Ostapenko, Feng Zhu, Derryck T. Reid, Jonathan Leach
Correlated photon pairs generated through spontaneous parametric down-conversion (SPDC) are a key resource in quantum optics. In many quantum optics applications, such as satellite quantum key distribution (QKD), a compact, high repetition rate pump laser is required. Here we demonstrate the use of a compact, GHz-rate diode-pumped three-element Kerr-lens-modelocked Ti:sapphire laser for the generation of correlated photon pairs at 790 nm. We verify the presence of indistinguishable photons produced via SPDC using Hong-Ou-Mandel (HOM) interferometry and observe a dip in coincidence counts with a visibility of 81.8\%.

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