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Data transmission via direct modulation of a mid-IR laser

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
A process for optically transmitting data to a remote receiver includes receiving a stream of input data signals and modulating a mid-IR laser by direct modulation with a waveform whose sequential values are responsive of the data signals of the stream. The direct modulation includes pumping the mid-IR laser to produce high and low optical power levels in response to different ones of the values. The process also includes transmitting output light from the modulated mid-IR laser to the remote receiver via a free space communications channel.
Bethea, Clyde George (Franklin Park, NJ), Capasso, Federico (Westfield, NJ), Cho, Alfred Yi (Summit, NJ), Gmachi, Claire F. (New Providence, NJ), Hutchinson, Albert Lee (Columbus, GA), Martini, Rainer (Hoboken, NJ), Paiella, Roberto (Short Hills, NJ), Sivco, Deborah Lee (Warren, NJ), Tredicucci, Alessandro (Chiavari, IT), Whittaker, Edward Anthony (Hoboken, NJ)
09/ 896,783
June 29, 2001
[0002] The U.S. Government has certain rights as provided by the terms of contract Nos. DAAD19-00-C-0096 awarded by DARPA and the US Army Research Office and by the terms of contract No. DE-FG08-99NV13656 awarded by the US Department of Energy.