Incoherent-to-Coherent Conversion by Use of the Photorefractive Beam-Fanning Effect and Amplification by Two-Wave...

Incoherent-to-coherent conversion by use of the photorefractive beam-fanning effect and amplification by two-wave coupling have been demonstrated experimentally in a photorefractive Ba(1-x)Sr(x)TiO(3) crystal. The converted coherent image is amplified by 60x. The resolution of the amplified coherent image is ~28 line pairs/mm. A notable advantage of the method is that incoherent-to-coherent conversion and coherence amplification of the converted coherent image are realized simultaneously in a photorefractive crystal.