用自散焦介质观测Ce:BaTiO_3晶体的自泵浦相位共轭频移

Frequency Shift Measurement of Self-Pumped Phase Conjugation in the Ce:BaTiO_3 Crystal Using Self-Defocusing Medium

提出利用自散焦介质作为载体测量光折变晶体自泵浦相位共轭的微小频移的新方法，适宜用于区分二波耦合、四波混频对频移的贡献，为研究光折变自泵浦相位共轭频移的产生机制提供了一种新的可能的途径。

A new method is proposed to measure small frequency shift of self-pumped phase conjugation in photo refractive crystal using defocus medium. It is suitable to distinguish between the contributions to frequency shift of the two-wave mixing and the four-wave mixing. The method provides a new approach to the study on the mechanism of frequency shift of self-pump phase conjugation.