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Fundamentals of Free-Space Optical CommunicationsFree-space optical communication systems potentially gain many dBs over RF systems. There is no upper limit on the theoretically achievable photon efficiency when the system is quantum-noise-limited: a) Intensity modulations plus photon counting can achieve arbitrarily high photon efficiency, but with sub-optimal spectral efficiency. b) Quantum-ideal number states can achieve the ultimate capacity in the limit of perfect transmissivity. Appropriate error correction codes are needed to communicate reliably near the capacity limits. Poisson-modeled noises, detector losses, and atmospheric effects must all be accounted for: a) Theoretical models are used to analyze performance degradations. b) Mitigation strategies derived from this analysis are applied to minimize these degradations.
Document ID
20130003283
Acquisition Source
Jet Propulsion Laboratory
Document Type
Presentation
External Source(s)
Authors
Dolinar, Sam
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Moision, Bruce
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Erkmen, Baris
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 27, 2013
Publication Date
June 25, 2012
Subject Category
Optics
Distribution Limits
Public
Copyright
Other
Keywords
deep space communications
free-space optical communications

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