Abstract
A transient phase-measuring technique that uses a self-pumped phase-conjugate mirror as an optical novelty filter is presented. A change in the reflectivity of the mirror as a function of a change in the incident wave front permits the transient measurement of a two-dimensional phase distribution. This method allows us to investigate fast processes using media with slow response. A simple theoretical model explains the experimental results with sufficient accuracy. The results can be used for the calibration of the measuring system. The described method is used for the measurement of a temporally varying wave front.
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