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Updated: Jul 19, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Dominant effect of polariton-polariton interactions on the coherence of the microcavity optical parametric oscillator
D N Krizhanovskii1, D Sanvitto, A P D Love
1Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.
Abstract:
The importance of interaction effects in determining the temporal coherence of spectrally and spatially isolated single modes of the microcavity optical parametric oscillator (OPO) is demonstrated. As a function of macroscopic occupancy, the coherence time (tau c) first increases linearly and then exhibits saturation behavior, reaching maximum values of up to 500 ps. Good agreement is found with a model including fluctuations in polariton number and polariton-polariton interactions between the OPO states. tau c is a property of the coupled OPO system, a result confirmed by the finding of equal coherence times for signal and idler, even though the idler is subject to strong additional scattering.
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