We demonstrate image reconstruction by way of four-wave mixing for a signal that makes a single pass through a distorting medium. Both the signal and the reference originate from the same source and propagate through the same disturbance. In the four-wave mixing process, phase aberrations are subtracted out. A read beam from a second source reconstructs the undistorted image, yielding a phase conjugate without a double pass through the disturbance. Good reconstructed image fidelity is demonstrated for static distortions if the phase mismatch between the signal and the reference beams is minimized. If there is significant phase mismatch, reconstructed image fidelity is poor. We show that this technique can also be used to measure the autocorrelation function of the disturbance when the mismatch between the signal and the reference in the four-wave mixing scheme is varied.
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