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Temperature dependence of photorefractive properties of a Cu-doped barium strontium potassium sodium niobate crystal
Optics Communications 164(1999)219-222，-0001，（）：
The gain of forward two-wave mixing (FTWM).and time response of a Cu-doped barium strontium potassium sodium niobate KNSBN.crystal are investigated at 514.5nm in the temperature range 20-1208C. It is found that the gain reaches its maximum value at about 908C. The effective photorefractive charge density decreases with temperature. The response and erasure rates increase with increasing temperature. Moreover, the erasure process can be described by a diexponential function. A band diagram of the two-center charge transport model is presented. The phenomena are explained qualitatively.
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