Mn:KNSBN晶体中弱入射光高反射率四波混频相位共轭

Phase conjugation in Mn:KNSBN crystal with high reflectivity under weak incident beams

功率为1mW左右的He-Ne激光束在Mn:KNSBN晶体中实现四波混频相位共轭。入射光相对于晶体主光轴的取向及入射光偏振组态对相位共轭反射率都有很大的影响。当物光近于布儒斯特角入射时,反射率可达60％。建立时间约为60sec的光折变光栅具有18hr左右的寿命。晶体中观察到诱导四波混频相位共轭。

Degenerate four-wave mixing phase conjugation in Mn doped KNSBN crystal is obtained by using 1mW He-Ne laser beams. The reflectivities are significantly affected by polarized arrangements and by angles of incident beams. When the angle of the probe beam is near Brewster angle the reflectivity can reach up to 60%. The life time of photorefractive grating which takes 60 s for setting up is 18 hr. The-induced degenerate four-wave mixing phase conjugation has been observed.