In this SBIR Phase-I project we aim to exploit a new invention in quantum cryptography to secure free-space optical links and networks. Unlike the techniques based on single-photon states that are limited to low bit rates and short distances, our approach is based on coherent states emitted by… More

This SBIR Phase-I project is aimed at exploiting an exciting new invention in the area of quantum cryptography to secure the physical layer of today's ubiquitous fiber-optic data networks. Unlike the techniques based on single-photon states that are confined to low bit rates and short distances, our… More

In this SBIR project we aim to exploit a new invention in quantum cryptography to secure free-space optical links and networks. Unlike the techniques based on single-photon states that are limited to low bit rates and short distances, our approach is based on coherent states emitted by ordinary… More

This SBIR Phase-II project further develops an exciting new invention in the field of quantum cryptography that will secure the physical layer of today's ubiquitous fiber-optic data networks. Unlike the techniques that are based on single-photon states which are confined to low bit rates and short… More

The use of optical technology in both terrestrial and space-based wireless links has compelling advantages in terms of data rate, power consumption, weight, and size of the system. However, with the adoption of such technology, we have become heavily reliant on high data rate optical communication… More

NuCrypt is developing the technology for physical-layer optical encryption that exploits the intrinsic, irreducible noise of light. Our method, called AlphaEta, has fundamental and practical security benefits and the technology performs similarly as standard optical communications equipment. We have… More

NuCrypt is developing the technology for physical-layer optical encryption that exploits the intrinsic, irreducible noise of light. Our method, called AlphaEta, has fundamental and practical security benefits and the technology performs similarly as standard optical communications equipment. We… More

Entangled photons have special properties arising from their quantum nature and have been used for scientific purposes such as demonstrating quantum teleportation. Several fascinating applications for entangled photons have been proposed including quantum metrology, computation, communication, and… More

Analog-to-digital conversion (ADC) is an essential operation in many applications including radar, sensing, communications, and instrumentation. Two key parameters of an ADC are its sampling rate and resolution, measured in samples per second and number of bits, respectively. Unfortunately, as the… More

Quantitative and visually intuitive information is critical to understanding, designing, and verifying the operation of any system. For instance, a vector signal analyzer allows a designer to gain an immediate understanding of a radio communications link by visualizing the transmission signal… More

Coherent light consisting of multiple-frequency combs is commonly used in metrology. Various methods of generating combs exist which are suited for different applications. Mode-locked lasers naturally output a train of phase-locked spectral lines and are a very simple way of generating a comb. These… More

Quantum key distribution (QKD) is an exciting application of the quantum theory to the important real-world problem of secure communications. Specifically, QKD may allow for provably secure key distribution. These random keys can then be used either in a one-time-pad style encryption system (for… More

Quantitative and visually intuitive information is critical to understanding, designing, and verifying the operation of any complex system. Measurement tools, such as vector signal analyzers which allow the visualization of radio frequency signal constellations, are now an indispensable part of… More

Detecting light at the single photon level is a fundamental measurement function that is useful in a wide variety of applications, including such diverse fields as biological spectroscopy, laser ranging, and quantum communications. Avalanche photodiode (APD) based single photon detectors (SPDs) are… More

ABSTRACT: Quantum key distribution (QKD) is an exciting application of quantum theory to the important real-world problem of secure communication. Specifically, QKD may allow for provably secure key distribution. These random keys can then be used either in a one-time pad style encryption system… More