Novel self-synchronization scheme for high-speed packet TDM networks

We demonstrate a novel self-synchronization scheme for high-speed packet ti me-division-mulitplexed (TDM) networks using a fast saturated, but slowly r ecovered gain (or loss) combined with intensity discrimination. The marker pulse used in this self-synchronization scheme is the same as other pulses in the packets. In particular, we use a semiconductor optical amplifier (SO A) as the fast saturated but slowly recovered gain element, and an unbalanc ed nonlinear optical loop mirror or a dispersion-shifted fiber/optical filt er combination as an intensity discriminator. The contrast ratio of the fir st pulse to the remaining pulses of a 100-Gb/s packet, "10111000" is >3 db at the output of the SOA and >20 dB at the outputs of both intensity discri minators.