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
Conventional analog-to-digital converters (ADCs) are fundamentally limited by timing jitter in the sampling source, forcing a trade-off between bandwidth and resolution. As a result, radio frequency (RF) systems are typically designed with narrow-bandwidth channels. These engineering constraints present problems when faced with broadband signals and ultra-short pulses. At high carrier frequencies, RF systems are further limited by the tuner that must mix down to baseband for electronic digitization.
In counterinsurgent, counter-terror campaigns, risks associated with conventional weapons in combat operations can severely limit their use and effectiveness, particularly in urban environments. These risks are largely associated with challenges posed by confining intended effects to adversary combatants and forces.
The goal of the EXTREME Program is to develop new optical components, devices, systems, architectures and design tools using Engineered Optical Materials (EnMats) to enable new functionality and/or vastly improve size, weight, and power characteristics of traditional optical systems. EnMats are broadly defined to include, but are not limited to, metamaterials (both metallic and dielectric), scattering surfaces and volumes, holographic structures, and diffractive elements.
Detection of photons—the fundamental particles of light—is ubiquitous, but performance limitations of existing photon detectors hinders the effectiveness of applications such as light/laser detection and ranging (LIDAR/LADAR), photography, astronomy, quantum information science, medical imaging, microscopy and communications. In all of these applications, performance could be improved by replacing classical, analog light detectors with high-performance photon counting detectors.
Enemy surface-to-air threats to manned and unmanned aircraft have become increasingly sophisticated, creating a need for rapid and effective response to this growing category of threats. High power lasers can provide a solution to this challenge, as they harness the speed and power of light to counter multiple threats. Laser weapon systems provide additional capability for offensive missions as well—adding precise targeting with low probability of collateral damage. For consideration as a weapon system on today’s air assets though, these laser weapon systems must be lighter and more compact than the state-of-the-art has produced.