The gas in the tube is stimulated, by an electrical discharge in the case of a helium-neon laser, and the stimulated photons bounce back and forth between the mirrors until some finally blast out ...

When we see a CO 2 laser cutter build around these parts ... We’ll further assume that stealing nitrogen for the lasing gas mix from car tires was just prank, but we did like the rough-and ...

The group has developed a new laser-based device that can take any sample of gas and identify a huge variety of the molecules within it. It is sensitive enough to detect those molecules at minute ...