Laser crystal with nonreciprocal feedback as a parametric mirror which performs passive optical phase conjugation
Antipov O. L., Belyaev S. I., Kuzhelev A. S.
Parametric passive phase conjugation of light beams has been achieved in a Nd:YAG crystal with a population inversion. Parametric generation arises in the field of orthogonally polarized, mutually incoherent light waves. These waves consist of a wave incident on the laser crystal and a wave which has traversed a feedback loop. Achieving passive phase conjugation of a light beam in a laser crystal requires that the feedback be nonreciprocal in terms of phases and amplitudes. © 1994 American Institute of Physics.