Defense Advanced Research Projects AgencyTagged Content List

Photonics, Optics and Lasers

Science and technology dealing with the transmission and manipulation of light

Showing 66 results for Photonics RSS
Many essential military capabilities—including autonomous navigation, chemical-biological sensing, precision targeting and communications—increasingly rely upon laser-scanning technologies such as LIDAR (think radar that uses light instead of radio waves). These technologies provide amazing high-resolution information at long ranges but have a common Achilles heel: They require mechanical assemblies to sweep the laser back and forth. These large, slow opto-mechanical systems are both temperature- and impact-sensitive and often cost tens of thousands of dollars each—all factors that limit widespread adoption of current technologies for military and commercial use.
DARPA’s High-Energy Liquid Laser Area Defense System (HELLADS) has demonstrated sufficient laser power and beam quality to advance to a series of field tests. The achievement of government acceptance for field trials marks the end of the program’s laboratory development phase and the beginning of a new and challenging set of tests against rockets, mortars, vehicles and surrogate surface-to-air missiles at White Sands Missile Range, New Mexico.
Conventional optical imaging systems today largely limit themselves to the measurement of light intensity, providing two-dimensional renderings of three-dimensional scenes and ignoring significant amounts of additional information that may be carried by captured light.
At the end of 2013, the United Nations General Assembly designated 2015 as the International Year of Light and Light-based Technologies (IYL 2015). And what could be more worthy of celebration than light?
Find a way to replace a large, heavy and expensive technology with an equivalent one that’s a lot smaller, lighter and cheaper and you have a shot at turning a boutique technology into a world changer. Think of the room-sized computers of the 1940s that now are outpowered by the run-of-the-mill central processing unit in laptop computers. Or the miniaturized GPS components that contribute geolocation smartness in cell phones. DARPA program manager Joshua Conway has another shrinking act in mind: packing the light-catching powers of bulky lens-filled telescopes onto flat, semiconductor wafers that are saucer-sized or smaller, featherweight and cheap to make.