Carrier suppression using adiabatic frequency modulation (AFM)
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United States of America Patent
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Mar 6, 2007
Grant Date -
Jan 5, 2006
app pub date -
Jan 18, 2005
filing date -
Nov 6, 2002
priority date (Note) -
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Abstract
A method and system for suppression of the optical carrier of an optically modulated digital signal, the method comprising the steps of: modulating the amplitude of an optical carrier with digital input data to generate an amplitude modulated optical signal; and modulating the frequency of the optical carrier of the resulting optical signal with the same digital input data. A fiber optic system comprising: an optical source adapted to produce an adiabatically chirped amplitude modulated optical signal; an optical fiber adapted to receive the optical signal; and an optical receiver; wherein the optical power of the signal launched into the fiber exceeds the stimulated Brillouin threshold of the transmission fiber for a single frequency, continuous wave signal.
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