An art installation featuring 30 laser beams in primary colors will shine from the top of the Space Needle Friday night.

suggesting potential applications in flow cytometry and laser guide stars for astronomy. “We report on the first visible orange samarium laser directly pumped by a blue 465 nm GaN semiconductor laser ...

Replacing the guide star with an artificial laser beacon alleviates this dependency on bright stars and therefore increases sky coverage, but it does not eliminate another serious problem for AO ...