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arXiv · 1303.7138

Unequivocal differentiation of coherent and chaotic light through interferometric photon correlation measurements

Armand Lebreton·Izo Abram·Rémy Braive·Isabelle Sagnes·Isabelle Robert-Philip·Alexios Beveratos
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Abstract

We present a novel experimental technique that can differentiate unequivocally between chaotic light and coherent light with amplitude fluctuations, and thus permits to characterize unambiguously the output of a laser. This technique consists of measuring the second-order intensity cross-correlation at the outputs of an unbalanced Michelson interferometer. It is applied to a chaotic light source and to the output of a semiconductor nanolaser whose "standard" intensity correlation function above-threshold displays values compatible with a mixture of coherent and chaotic light. Our experimental results demonstrate that the output of such lasers is not partially chaotic but is indeed a coherent state with amplitude fluctuations.

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Armand Lebreton, Izo Abram, Rémy Braive, Isabelle Sagnes, Isabelle Robert-Philip, Alexios Beveratos. 2013-03-28. Unequivocal differentiation of coherent and chaotic light through interferometric photon correlation measurements. https://doi.org/10.1103/physrevlett.110.163603

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