在CuKNSNS晶体中,用8 mW的连续532 nm激光泵浦,产生很强的谐振腔振荡,但未观察到自泵浦相位共轭信号。用平均功率为1 mW的同波长锁模ps激光脉冲列泵浦,谐振腔振荡相对弱很多,但很容易形成自泵浦相位共轭,这显然不支持自泵浦相位共轭的谐振腔模型。

It is found experimentally that with no self pumped phase conjugation an intensive internal oscillation is observed inside a Cu doped KNSBN crystal pumped with an 8 mW laser beam of continous wave at 532 nm. But when the crystal is pumped with mode locked picosecond laser pulses with an average power of 1 mW at 532 nm, self pumped phase conjugation with hardly observed interal oscillation is easily formed. It suggests that our experimental results do not support the resonator mode of self-pumped phase conjugation.