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.
© 1983 Optical Society of America
Takuso Sato, Tohru Suzuki, Peter J. Bryanston-Cross, Osamu Ikeda, and Takeshi Hatsuzawa, "Coherent optical image delay device using a BSO phase-conjugate mirror and its applications," Appl. Opt. 22, 815-818 (1983)