Photoelectron Counting Statistics for the Degenerate Parametric Oscillator
Parametric oscillators are important sources of squeezed light. Theoretically, in the absence of loss, a degenerate parametric oscillator near threshold produces perfectly squeezed light over a narrow band of frequencies centered on the cavity resonance.1-3 Noise reductions of up to ~60% below the vacuum level have been achieved in experiments.4,5
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