Technology using lasers to read atmospheric disturbances has a wide array of applications. The Very Large Telescope array at Cerro Paranal, Chile, uses a "laser guide star" and "laser adaptive optics" to correct their telescopes' optical signal. The 8-meter wide mirrors are backed with thousands of hydraulically-powered "feet" capable of flexing tiny regions of the mirror with microscopic precision in response to laser measurements to correct "ocular aberrations." Multiple telescopes are networked allowing their images to be merged, both compounding their acuity and providing a 3-D perspective. In the visible spectrum VLT has just slightly lower resolution than Hubble, but the up-side is you don't have to hitch a multi-million dollar ride into space from goddam Russians every time a light bulb burns out.
DARPA is today where NASA was in the 1960s. It's a magnet for the best scientists the US (and much of the rest of the world) can produce, partly out of patriotism, partly out of lusting after the access to exclusive technology, and partly for bragging rights. It has minimal bureaucracy, a direct line to the US Mint, and clarity of mission. What more could a science wonk ask for?