Abstract
The Bi12SiO20 (BSO) crystal has been used as an optical storage medium for a 2-D optical field to obtain a delayed coherent optical image. The method used the BSO crystal in a four-wave mixing configuration to produce a phase-conjugated wave front. It has been demonstrated that the image of a vinyl film could be compared with its stored image over a time delay varying from 40 msec to a few seconds. Measurements have also been made of the changes of optical path length within this inhomogeneous medium.
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