【摘要】 聚焦普通脉冲钕玻璃激光于未电极化的锆钛酸系(PZT)陶瓷薄片上,在激光击穿样品之前,样品两表面银电极间无电信号出现.然而,一旦样品被光击穿,电极间就会出现脉冲电信号.在电极接线保持不变的情况下,光从前后两表面入射而击穿样品时,所产生的电信号极性正相反.在穿孔较小时所产生的电信号极性是逆光方向,但在穿孔大到适当值时信号极性变为顺光方向.更多还原

【Abstract】 Focusing a normal pulsed Nd-glass laser radiation on an nupolarized PZT ceramio thin plate, there was no electrical signal was observed between the two surface silver electrodes of the sample before the laser radiation breakdown through the sample. However, as soon as the breakdown of the sample happened, a pulsed electrical signal occured between the two surface-electrodes. The connections of the two electrodes remained unchanged in cases of the laser radiation irradiated the sample from either its front or back surface, the polarities of the produced electrical signals would be opposite to each other. When a hole penetrated on the sample was very small, the polarity of the signal was opposite to incident direction of the radiation. However, when the hole became big enough, the polarity of the signal would turn to incident direction of the radiation.更多还原