Experimental demonstration of frequency-degenerate bright EPR beams with a self-phase-locked optical parametric oscillator
arXiv:0804.0508 · doi:10.1364/OE.16.009351
Abstract
We report the first experimental observation of bright EPR beams produced by a type-II optical parametric oscillator operating above threshold at frequency degeneracy. The degenerate operation is obtained by introducing a birefringent plate inside the cavity resulting in phase locking. After filtering the pump noise, which plays a critical role, continuous-variable EPR correlations between the orthogonally polarized signal and idler beams are demonstrated.
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