本文报道在He-Ne激光的632.8 nm实现KNbO3:Fe自泵相位共轭。虽然光折变材料的耦合系数随工作波长的增加而减少,但通过晶体材料的特殊切割,充分利用了最大电光系数:r42=380 pm/V和内表面的全反射,获得的自泵相位共轭反射率可达40％。

In this paper we report for the first time the observation of self-pumped phase conjugation, in KNbO3:Fe at 632.8nm He-Ne laser wavelength. We note the coupling coefficient decreases with working wavelength in photorefractive materials. Our experiments were carried out with the crystal specially cut to bring the largest electro-optic coefficient r42 and total internal reflection on the inner surfaces. The reflectivity of 40% for self-pumped phase conjugation at 632.8 nm was obtained.