40-GHz All-Optical Clock Extraction Using a Semiconductor-Assisted Fabry–PÉrot Filter

We obtain 40-Gb/s all-optical clock recovery by means of a very simple scheme. We use a high finesse low-loss Fabry-Pe/spl acute/rot filter and a semiconductor optical amplifier acting as an amplitude equalizer. The recovered clock signal shows large locking range, low amplitude fluctuation, and limited time jitter.