Abstract
It has been recognized that at data rates higher than 10 Gbit/s it will be necessary to provide tunable dispersion compensators (TDCs) in order to accommodate uncertainties and dynamic variations in link dispersion, and various tunable dispersion compensators have been demonstrated.1 In order for such devices to be useful, the chromatic dispersion degradation of the data stream must be determined and used as a feedback signal to control the TDC. Various feedback signals are possible, including, bit error rate derived from forward-error correction algorithms, eye monitoring,2 and schemes that rely on monitoring the RF spectrum of the detected bit stream after a fast photodetector.3
© 2002 Optical Society of America
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