Continuous-wave phase-sensitive parametric image amplification
  We study experimentally parametric amplification in the continuous regime using a transverse-degenerate type-II Optical Parametric Oscillator operated below threshold. We demonstrate that this device is able to amplify either in the phase insensitive or phase sensitive way first a single mode beam, then a multimode image. Furthermore the total intensities of the amplified image projected on the signal and idler polarizations are shown to be correlated at the quantum level. 
S. Gigan, L. Lopez, V. Delaubert, N. Treps, C. Fabre and A. Maitre