Abstract
Photorefractive (PR) strontium barium niobate (SBN) has been the subject of extensive research in recent years. Large PR nonlinearities and relatively fast response time at low power levels make this material a preferred candidate for a variety of applications such as optical data storage. Intensity dependent absorption and related phenomena were discovered and investigated extensively in different PR crystals and at different optical light intensities spanning the range of 1 mW/cm/sup 2/ to 10/sup 4/ W/cm/sup 2/. In this study we investigate the light-induced absorption through pump-probe measurement at relatively low optical power densities in photorefractive SBN:60 and SBN:75. >
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