45°-cut BaTiO<sub>3</sub> crystals have been studied and used for their enhanced photorefractive performance. Theoretically, BaTiO<sub>3</sub> crystal has its maximum two-wave mixing （TWM...45°-cut BaTiO<sub>3</sub> crystals have been studied and used for their enhanced photorefractive performance. Theoretically, BaTiO<sub>3</sub> crystal has its maximum two-wave mixing （TWM） gain when the grating wave vector K<sub>g</sub> is about 45° tilted with respect to its C-axis. However, for thick samples, the effective gain is usually reduced because of the fanning problem. At steady states, the effective TWM gain of a 45°-cut BaTiO<sub>3</sub> is normally展开更多
基金Project supported by the K.C.Wong Education Foundation. Hong Kong
文摘45°-cut BaTiO<sub>3</sub> crystals have been studied and used for their enhanced photorefractive performance. Theoretically, BaTiO<sub>3</sub> crystal has its maximum two-wave mixing （TWM） gain when the grating wave vector K<sub>g</sub> is about 45° tilted with respect to its C-axis. However, for thick samples, the effective gain is usually reduced because of the fanning problem. At steady states, the effective TWM gain of a 45°-cut BaTiO<sub>3</sub> is normally
