Observation of two-photon interference in a dual-beam Michelson interferometer

P. G. Kwiat, W. A. Vareka, R. Y. Chiao, C. K. Hong, H. Nathel

Research output: Contribution to conferencePaperpeer-review


It has been suggested that one can observe a violation of Bell's inequalities for position and time by using two spatially separated interferometers. The observation of a closely related two-photon interference is reported here. A signal photon at frequency ωs and an idler photon at frequency ωi = ωp - ωs are created simultaneously, i.e., as a conjugate pair, in parametric fluorescence inside a KDP crystal from the annihilation of a single UV pump photon with frequency ωp. Energy is conserved during this process, but this does not forbid the signal and idler photons from having a broad spread in energy, although the laser-produced pump photon has a very narrow linewidth so that Δωp ≪ Δωs, and Δωi. Results obtained with a dual-beam Michelson inteferometer are reported. A simplified quantum analysis of this interference effect is discussed.

Original languageEnglish (US)
Number of pages2
StatePublished - 1990
Externally publishedYes
Event17th International Conference on Quantum Electronics - IQEC '90 - Anaheim, CA, USA
Duration: May 21 1990May 25 1990


Other17th International Conference on Quantum Electronics - IQEC '90
CityAnaheim, CA, USA

ASJC Scopus subject areas

  • General Engineering


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