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OAM-based Entanglement Assisted Free-Space Optical Communication with Unknown Receiver Position
This technology relates to a combination of an entanglement-assisted free-space optical communication testbed and orbital angular momentum (OAM)-based beam shaping to acquire and communicate with receivers whose exact position is unknown, covering a wide search area in strong turbulence regime.
Background:
Establishing a free-space optical (FSO) communication...
Published: 3/2/2026
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Inventor(s): Ivan Djordjevic, Ignacio Rojas, Vijay Nafria
Keywords(s):
Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking, Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Optical, Technology Classifications > Imaging & Optics > Telecommunications, Technology Classifications > Engineering & Physical Sciences > Quantum
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Entanglement Assisted LPI and Covert Communications with SLM-based Beam Steering over Turbulent Optical Channels
This invention enables high-speed covert optical communication using entanglement-assisted transmission and spatial light modulators (SLM) for beam steering. This technology achieves better performance over turbulence than classical systems without requiring phase conjugation.
Background:
Covert optical communication technologies are becoming more...
Published: 2/8/2026
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Inventor(s): Ivan Djordjevic, Ignacio Rojas
Keywords(s):
Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking, Technology Classifications > Engineering & Physical Sciences > Quantum
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Two-Pumps-Based Degenerate Entanglement Assisted Communication with SLM-Based Beam Pointing
This technology is an entanglement assisted (EA) communications system that employs two pump lasers in order to more easily satisfy quasi-phase matching conditions. Rather than performing optical phase-conjugation (OPC) on signal photons, this technology transmits unmodulated idler photons alongside modulated signal photons without the use of OPC. This...
Published: 9/22/2025
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Inventor(s): Ivan Djordjevic, Ignacio Rojas
Keywords(s):
Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking, Technology Classifications > Engineering & Physical Sciences > Quantum
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Covert Free-Space Optical Communications with SLM-Based Beam Steering
This is a system for secure low probability of detection communications across a free-space optical (FSO) channel. The system utilizes an LED-based source which transmits signals with distributions that match the distribution of the background solar radiation, which hides the signals. The transmitted signals are modulated according to a phase-shift...
Published: 9/22/2025
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Inventor(s): Ivan Djordjevic, Ignacio Rojas
Keywords(s):
Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking, Technology Classifications > Imaging & Optics > Materials & Fabrication
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