Abstract
We investigate the characteristics of all-optical clock recovery for
return-to-zero differential phase-shift keying (RZ-DPSK) and return-to-zero
on-off keying (RZ-OOK) signals at 40 Gb/s using mode-locked semiconductor
lasers. Two mode-locked lasers with different configurations, a bulk active
layer distributed Bragg reflector laser and a quantum-dot active layer Fabry-Pérot
laser, are used in the experimental investigation. The results reveal the
implications of the input signal power, beat spectrum linewidth of the mode-locked
laser, and intensity modulation on the jitter characteristics of the recovered
clock signal.
© 2009 IEEE
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