Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitter
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United States of America Patent
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Mar 6, 2012
Grant Date -
Jul 31, 2008
app pub date -
Jan 22, 2008
filing date -
Jan 22, 2007
priority date (Note) -
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Abstract
An optical transmitter is disclosed wherein a modulating signal, such as an NRZ signal, encoding data is combined with a time derivative of the modulating signal and coupled to a directly modulated laser in order to generate artificial transient chirp in the output of the laser effective to substantially compensate for dispersion experienced by the output of the laser traveling through a dispersive medium such as an optical fiber. In some embodiments, the time derivative is added to the modulating signal only at the falling edges of the modulating signal.
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