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Full-duplex optical communication systemA method of full-duplex electromagnetic communication wherein a pair of data modulation formats are selected for the forward and return data links respectively such that the forward data electro-magnetic beam serves as a carrier for the return data. A method of encoding optical information is used wherein right-hand and left-hand circular polarizations are assigned to optical information to represent binary states. An application for an earth to low earth orbit optical communications system is presented which implements the full-duplex communication and circular polarization keying modulation format.
Document ID
20080005174
Acquisition Source
Goddard Space Flight Center
Document Type
Other - Patent
Authors
Shay, Thomas M.
Hazzard, David A.
Horan, Stephen
Payne, Jason A.
Date Acquired
August 24, 2013
Publication Date
August 17, 2004
Subject Category
Communications And Radar
Report/Patent Number
Patent Application Number: US-PATENT-APPL-SN-738045
Patent Number: US-PATENT-6,778,779
Funding Number(s)
CONTRACT_GRANT: NAG5-7520
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-6,778,779
Patent Application
US-PATENT-APPL-SN-738045

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