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Correlated photon pairs generated through spontaneous parametricdown-conversion (SPDC) are a key resource in quantum optics. In many quantumoptics applications, such as satellite quantum key distribution (QKD), acompact, high repetition rate pump laser is required. Here we demonstrate theuse of a compact, GHz-rate diode-pumped three-element Kerr-lens-modelockedTi:sapphire laser for the generation of correlated photon pairs at 790 nm. Weverify the presence of indistinguishable photons produced via SPDC usingHong-Ou-Mandel (HOM) interferometry and observe a dip in coincidence countswith a visibility of 81.8\%.

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