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Frontiers in Optics

Two-photon Interference of Independent Identical Sources

Douglas Vitoreti, Thiago Ferreira da Silva, Guilherme P. Temporão, Jean Pierre von der Weid

Published Jan 1, 2012• 0 citations
Publisher

Abstract

We present an analysis of two-photon interference by emulating independent laser sources with delayed self homodyne technique. Laser linewidth was varied and coincidence counts were observed after a beam-splitter by photon counting.
DOI
10.1364/ls.2012.ltu1j.1

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Interference fringes produced by the superposition of light beams from two independent lasers have been investigated under conditions where the light flux was so low that one photon was usually received at the detector before the next one was emitted by one or the other source. Because the average number of photons detected in each observation was only about 10, a photon correlation technique was used to demonstrate the presence of interference fringes. The measurement procedure was automated, and this led to much greater statistical accuracy than was previously reported. The effect of varying the observation time and the number of interference fringes sampled was investigated, and found to be in good agreement with theory.
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