Tunable dispersion compensator with minimum differential group delay
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United States of America Patent
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Nov 9, 2010
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app pub date -
Jan 11, 2009
filing date -
Jan 17, 2008
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Abstract
In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped fiber Bragg grating, each such grating providing a respective tunable amount of dispersion. At least one respective DGD element is connected into the respective pathway for each such grating. The set of all such respective DGD elements in a given pathway introduces a bias differential group delay DGD(.sub.bias) having an absolute value that, for at least one tuning value of the grating, is substantially equal to differential group delay introduced by the grating.
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