Abstract
Nonlinear beam propagation in absorbing media was originally examined by numerical simulations of the propagation of an electric field interacting with homogeneously broadened two-level atoms.1,2 Two significant predictions of the theory were cw on-resonance enhancement (CORE) and Fresnel ring encoding on the propagating beam. CORE has been observed in sodium vapor experiments3 where the center intensity of a beam traveling through an absorbing media increased by 69%. Fresnel ring encoding of an Ar-ion laser beam propagating through a sample of pink ruby has also been demonstrated.4 We further the work by discussing the experimental study of the effect of an absorbing birefringent media on a propagating laser beam.
© 1989 Optical Society of America
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