POLARIZATION TRACKING SYSTEM FOR FREE-SPACE OPTICAL COMMUNICATION, INCLUDING QUANTUM COMMUNICATION

World Intellectual Property Organization Patent

APP PUB NO WO-2013048671-A1
SERIAL NO

PCTUS2012053378

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Abstract

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Quantum communication transmitters include beacon lasers that transmit a beacon optical signal in a predetermined state of polarization such as one of the states of polarization of a quantum communication basis. Changes in the beacon polarization are detected at a receiver, and a retarder is adjusted so that the states of polarization in a received quantum communication optical signal are matched to basis polarizations. The beacon and QC signals can be at different wavelengths so that the beacon does not interfere with detection and decoding of the QC optical signal.

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Patent Owner(s)

Patent OwnerAddress
LOS ALAMOS NAT SECURITY LLCUSNEW MEXICO USA

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Inventor(s)

Inventor Name Address
HUGHES RICHARD J MORRISVILLE PA
PETERSON CHARLES G LOS ALAMOS NM 87544
NORDHOLT JANE E LOS ALAMOS NM
NEWELL RAYMOND T SANTA FE NM 87506

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