Abstract

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-xSr_xTiO₃ crystal. The converted coherent image is amplified by 60×. 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.

© 2001 Optical Society of America

Incoherent-to-coherent conversion by use of the photorefractive fanning effect

Jiasen Zhang, Huitian Wang, Shin Yoshikado, and Tadashi Aruga
Opt. Lett. 22(21) 1612-1614 (1997)

High-resolution incoherent-to-coherent conversion by use of the photorefractive fanning effect

Jiasen Zhang, Huitian Wang, Shin Yoshikado, and Tadashi Aruga
Appl. Opt. 38(6) 995-1000 (1999)

Fanning noise reduction in photorefractive amplifiers using incoherent erasures

Q. Byron He and Pochi Yeh
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Speckle-free image amplification by two-wave coupling in a photorefractive crystal

Y. Kawata and S. Kawata
Appl. Opt. 32(5) 730-736 (1993)

Enhancement of two-wave coupling in a Ce:KNSBN crystal with optimum polarization of the writing beams

Bao-Lai Liang, Zhaoqi Wang, C. M. Cartwright, W. A. Gillespie, Mei-Song Ding, and Hui Zhang
Appl. Opt. 40(20) 3359-3364 (2001)