Phase conjugate imaging by type II parametric amplification

Éric Lantz, F. Devaux, Gaëlle Le Tolguenec

Éric Lantz, F. Devaux, Gaëlle Le Tolguenec

Éric Lantz, F. Devaux, Jean-Luc Blanchet

F. Devaux, Elvire Guiot, Éric Lantz

Restoration of an image through an aberrant plate has been achieved by use of optical phase conjugation in a type II parametric interaction in which the amplified signal and idler waves are reflected back through the aberrant medium. The resolution of the restored phase-conjugate images is equal to 0.18 mm, and the amplification gain is ~4dB.

Sylvain Gigan, L. Lopez, V. Delaubert +3 more

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.

Jovanović