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Polarization backward-wave four-wave mixing in BaTiO3:Fe using the photovoltaic effect

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Abstract

We report the first study to our knowledge of polarization backward-wave four-wave mixing in a BaTiO3:Fe crystal and compare the results of our measurements with the calculations performed within the model of photovoltaic charge transport. Two identically polarized pump waves and one orthogonally polarized signal wave are sent to a sample in a plane normal to the crystal’s C axis; a phase-conjugate wave with polarization identical to that of the signal wave is generated. With a 2-mm-thick sample a phase-conjugate reflectivity Rpc 0.01 is reached; for a 1-cm-thick sample, amplified reflection should be possible.

© 1997 Optical Society of America

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