Photon bunching in parametric down-conversion with continuous wave excitation

Author(s): B. Blauensteiner, I. M. Herbauts, S. Betteli, A. Poppe, H. Hübel

Journal: Phys. Rev. A

Volume: 79

Page(s): 063846

Year: 2009

DOI Number: 10.1103/PhysRevA.79.063846

Link: Link to publication


Direct measurement of photon bunching (g(2) correlation function) in one output arm of a spontaneousparametric- down-conversion source operated with a continuous pump laser in the single-photon regime is demonstrated. The result is in agreement with the statistics of a thermal field of the same coherence length and shows the feasibility of investigating photon statistics with compact continuous-wave-pumped sources. Implications for entanglement-based quantum cryptography are discussed.


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