Defense Advanced Research Projects AgencyTagged Content List

Photonics, Optics and Lasers

Science and technology dealing with the transmission and manipulation of light

Showing 21 results for Photonics + Spectrum RSS
September 20, 2016,
DARPA Conference Center
The Defense Advanced Research Projects Agency (DARPA) Microsystems Technology Office (MTO) is sponsoring a Proposers Day to present its technical vision and mission and to provide information to potential proposers on the MTO Office-Wide Broad Agency Announcement (BAA) and the anticipated Commercial Performer Program Announcement.
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.
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.
Real-time assessment of the electromagnetic environment can provide a key tactical advantage. The rapid development and proliferation of advanced radios, however, has made this a challenging task. Radio frequency (RF) sensor systems on the modern battlefield must cover many RF and microwave bands through noise and powerful interferers. Ultra-wideband analog-to-digital conversion (ADC) has emerged as an essential technology to interface between propagating analog RF signals and digital processing for reactive decision-making. Such an ADC allows for high-speed and reconfigurable digital processing in a complex electromagnetic environment.