Hong-Ou-Mandel interference with a diode-pumped 1-GHz Ti:sapphire laser
Imogen Morland, Hanna Ostapenko, Feng Zhu, Derryck T. Reid and, Jonathan Leach
TL;DR
This paper demonstrates the use of a compact, high-repetition-rate diode-pumped Ti:sapphire laser to generate indistinguishable photon pairs via SPDC, verified through Hong-Ou-Mandel interference with high visibility, suitable for quantum communication applications.
Contribution
It introduces a GHz-rate diode-pumped Ti:sapphire laser for efficient photon pair generation and verifies photon indistinguishability using HOM interference.
Findings
Achieved 81.8% HOM interference visibility.
Generated correlated photon pairs at 790 nm.
Demonstrated suitability for satellite quantum key distribution.
Abstract
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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Taxonomy
TopicsAdvanced Fiber Laser Technologies · Laser-Matter Interactions and Applications · Solid State Laser Technologies