For digital signal of low frequence, using opto - coupled isolator is simpler, but, for digital signal of intermediate or high frequence, the signal will be aberrant.
对于低频数字信号，光电耦合器件应用起来比较简单，但对于中高频数字信号，会使信号产生畸变。
When a normal pulsed laser radiation is focused to irradiating a target of metal or isolator, a space electric signal will be observed in the vaporized and ejected material before the target.
当普通脉冲激光聚焦照射金属或绝缘体靶时，在靶前面激光产生的蒸汽和溅射物质中，观察到空间电信号。本文报导了有关实验结果，并作了定性分析。
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