Demonstrating various quantum effects with two entangled laser beams
  We report on the preparation of entangled two mode squeezed states of yet unseen quality. Based on a measurement of the covariance matrix we found a violation of the Reid and Drummond EPR-criterion at a value of only 0.36\pm0.03 compared to the threshold of 1. Furthermore, quantum state tomography was used to extract a single photon Fock state solely based on homodyne detection, demonstrating the strong quantum features of this pair of laser-beams. The probability for a single photon in this ensemble measurement exceeded 2/3. 
B. Hage, J. Janou\v{s}ek, S. Armstrong, T. Symul, J. Bernu, H.M.   Chrzanowski, P.K. Lam, H.A. Bachor
quant-ph