First superradiant lasers produce nearly no photons (and that's expected)

Here's a press release / article from JILA. Not very technical. There's a paper in Nature too.

(http://jila.colorado.edu/content/laser-perfect-pitch)

(http://www.nature.com/nature/journal/v484/n7392/full/484043a...)

I love how the photo of the apparatus looks very much like Beaker from The Muppets, caught in mid scream.