Method and apparatus for multiplexed optical communication system using spatial domain multiplexing (SDM) and orbital angular momentum of photon (OAM) multiplexing with wavelength division multiplexing (WDM)
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United States of America Patent
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Jul 18, 2017
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Feb 8, 2016
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Feb 6, 2015
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Abstract
A multiplexed optical communication system comprising a carrier optical fiber, a plurality of launching light sources, and a matching plurality of multiplexer/demultiplexers and photodetectors is described and claimed. Optical communication channel separation by Spatial Domain Multiplexing (SDM), Optical Angular Momentum (OAM) multiplexing, and Wavelength Division Multiplexing (WDM) is used in combination to achieve significant increase in optical communication channel bandwidth over the prior art. The launching light sources may be positioned such that the light beams are incident on the receiving end of the carrier optical fiber at desired angles including complementary angles. Crosstalk between optical communication channels is minimal. The communication bandwidth of a TDM system may be increased by an order of magnitude due the layered WDM/SDM/OAM data multiplexing of the invention.
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