Stimulated Photorefractive Backscatter Leading to Six-Wave Mixing and Phase Conjugation in Iron-Doped Lithium Niobate

Document Type

Article

Publication Date

8-2007

Publication Source

Applied Optics

Abstract

The generation of multiple waves during near-oblique incidence of a 532  nm weakly focused beam on photorefractive iron-doped lithium niobate in a typical reflection geometry configuration is studied. It is shown that these waves are produced through two-wave coupling (self-diffraction) and four-wave mixing (parametric diffraction). One of these waves, the stimulated photorefractive backscatter produced from parametric diffraction, contains the self-phase conjugate. The dynamics of six-wave mixing and its dependence on crystal parameters, angle of incidence, and pump power are analyzed. What we believe to be a novel order analysis of the interaction equations provides further insight into experimental observations in the steady state. The quality of the backscatter is evaluated through image restoration, interference experiments, and visibility measurement. Reduction of two-wave coupling may significantly improve the quality of the self-phase conjugate.

Inclusive pages

6151-6160

ISBN/ISSN

1559-128X

Comments

Permission documentation is on file.

Publisher

Optical Society of America

Volume

46

Peer Reviewed

yes

Issue

24

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