Abstract

Optical phase conjugation is measured in a doped semiconductor containing DX centers. This is to our knowledge the first observation of a steady-state optical nonlinearity in these materials. Phase-conjugate reflectivities of 0.3% result from four-wave mixing in AlGaAs:Te at intensities of the order of 1 mW/cm². The measured nonlinear-optical sensitivity of ∼0.4 cm²/J is 2 orders of magnitude larger than that in ferroelectric photorefractive crystals.

© 1996 Optical Society of America

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