Abstract
Phase conjugation (PC) by degenerate four-wave mixing in photorefractive crystals such as LiNbO3, BSO, BaTiO3 is different in kind than PC in opther media. The effect is non-local and the nonlinearity, say X(3) cannot be obtained from the solution of atomic responses. Strictly speaking, we cannot characterize the medium response by a simple constitutive third order nonlinear constant X(3) since the strength of the grating produced by the interference of two optical beams depends on the period of the gratings, clearly a nonlocal effect.
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© 1984 Springer Science+Business Media New York
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Yariv, A., Cronin-Golomb, M. (1984). Phase Conjugation in Photorefractive Media. In: Mandel, L., Wolf, E. (eds) Coherence and Quantum Optics V. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-0605-5_16
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DOI: https://doi.org/10.1007/978-1-4757-0605-5_16
Publisher Name: Springer, Boston, MA
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