Dual-Pump Approach to Photon-Pair Generation: Demonstration of Enhanced Characterization and Engineering Capabilities

22 Jun 2019  ·  Zhang Yujie, Spiniolas Ryan, Shinbrough Kai, Fang Bin, Cohen Offir, Lorenz V. O. ·

We experimentally study the generation of photon pairs via spontaneous four-wave mixing with two distinct laser pulses. We find that the dual-pump technique enables new capabilities: 1) a new characterization methodology to measure noise contributions, source brightness and photon collection efficiencies directly from raw photon-count measurements; 2) an enhanced ability to generate heralded single photons in a pure quantum state; and 3) the ability to derive upper and lower bounds on heralded-photon quantum state purity from measurements of photon-number statistics even in the presence of noise... Such features are highly valuable in photon-pair sources for quantum applications. read more

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Quantum Physics Optics