Most of the time the lasers are dark, producing areas of light with low intensities with the occasionally brief but brilliant flashes of high - intensitylight.
大部分的时间里激光是暗的，产生低强度的光区伴随着偶尔短暂的高强度光的闪烁。
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Nor is it possible simply to crank up the power of the source beam, because infra-red light at highintensity can cause eye damage.
These researchers were encoding digital data by varying the intensity of a pulse of light. For example, highintensity would represent a 1 and low intensity would represent a 0.