From classical four-wave mixing to parametric fluorescence in silicon microring resonators

Azzini, Stefano and Grassani, Davide and Galli, Matteo and Andreani, Lucio Claudio and Sorel, Marc and Strain, Michael J and Helt, L.G. and Sipe, J.E. and Liscidini, Marco and Bajoni, Daniele (2012) From classical four-wave mixing to parametric fluorescence in silicon microring resonators. Optics Letters, 37 (18). pp. 3807-3809.

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Abstract

Four-wave mixing (FWM) can be either stimulated or occur spontaneously. The first process is intrinsically much stronger and well understood through classical nonlinear optics. The latter, also known as parametric fluorescence, can be explained only in the framework of a quantum theory of light. We experimentally demonstrated that, in a microring resonator, there is a simple relation between the efficiencies of these two processes that is independent of the nonlinearity and ring size. In particular, we have shown the average power generated by parametric fluorescence can be immediately estimated from a classical FWM experiment. These results suggest that classical nonlinear characterization of a photonic integrated structure can provide accurate information on its nonlinear quantum properties.