When imprinted on silicon glass, these converters are able to alter the polarization of ultra-short pulses of laser light passing through them.

这些转换器在被压印到硅玻璃上之后，能改变通过它的超短脉冲激光的偏振方式。

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But another machine in the plant, which USES a laser to scan the passing material, can sort plastic by type and colour with great accuracy.

但是工厂里的另一套设备则不一样了。其利用激光对经过的材料进行扫描，按照塑料的种类和颜色进行分类，且准确率极高。

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With pressure and electricity, the laser creates dimers by passing electrical current through mixtures of reactive gases, such as fluorine or chlorine, and inert gases, such as krypton or argon.

用压力和电能，所述激光通过使电流通过反应性气体，如氟或氯，和惰性气体，如氪或氩气的混合物产生二聚体。

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They have been testing a laser system for measuring lunar dust and soil kicked up by rocket exhausts, and while using precipitation as a substitute to calibrate the laser, they found they could measure the average size of raindrops passing through it.

ENGADGET: NASA accidentally improves weather forecasting with lunar dust-measuring lasers

Unfortunately, a passing gravitational wave will make only a tiny change in the distance the laser beams have to travel.

ECONOMIST: Fundamental physics