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The chirp and bandwidth tuneability of a passive feedback laser are used to obtain a modulation passband that is void of power fading dips and allows the transmission of 21.418 Gbit/s and 10.709 Gbit/s SCM signals over 61 km and 102 km of SMF, respectively.
We demonstrate a novel blind equalizer based on a constellation transformation, where a 16-QAM signal is mapped into a QPSK constellation. Subsequently, the filter coefficients for an adaptive equalizer are updated using a constant modulus or decision-directed cost function.
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