Bright Entangled Beams from an Above-Threshold Optical Parametric Oscillator
K. N. Cassemiro, Alessandro S. Villar, Paulo Valente, M. Martinelli, P. Nussenzveig · 2007
We generated bright entangled beams in an optical parametric oscillator, operating above threshold. Tripartite pump-signal-idler entanglement, all with different frequencies, was also predicted and three-color quantum correlations already measured.