A new source of coherent light beams...

A new source of coherent light beams ... 250 times more efficiently than lasers.  The current incarnation only puts out tiny amounts of power, but then so did the first semiconductor lasers.  The first one also emits in the ultraviolet range, something very difficult for LEDs or semiconductor lasers to accomplish.  If this proves to be scalable and manufacturable, it will be a very big thing indeed...