Type-II Optical Parametric Oscillator : a versatile source of quantum   correlations and entanglement
  Type-II Optical Parametric Oscillators are efficient sources of quadrature squeezed or polarization squeezed light, intensity correlated beams, and entangled light. We review here the different levels of quantum correlations and entanglement that are reached in this device, and present some applications. 
Julien Laurat (LKB - Jussieu), Thomas Coudreau (LKB - Jussieu), Claude   Fabre (LKB - Jussieu)