Optical method of transmitting digital data
OwnerJean-Luc Beylat, Jose Chesnoy +1inventors
InventorsJean-Luc Beylat, Jose Chesnoy, Denis Penninckx
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Abstract
To increase the transmission length in an optical fiber, a method of transmitting digital data uses both power modulation and phase modulation of an optical carrier. To compensate the chromatic dispersion produced by the fiber, a phase-shift is applied to the wave within each time cell in which the optical power is low and that precedes or follows a cell in which the power is high. Applications include long-distance optical transmission using standard fibers.
Claims10
A method of transmitting binary data contained in respective successive time cells, said data being in the form of an optical signal obtained by power modulation of an optical carrier wave, a first and a second binary data value respectively corresponding to a low and a high mean power within each cell containing said data, wherein a phase-shift is applied to said carrier wave within each cell that contains said first binary value and precedes or succeeds any block of consecutive cells containing said second binary value or any isolated cell containing said second binary value.
Dependencies are inferred from the claim text.