Optical bistability in a SOA/DFB-LD feedback scheme

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Simulation of the switching of an all-optical flip-flop based on a SOA/DFB-laser diode optical feedback scheme

All-Optical flip-flop operation using a SOA and DFB laser diode in an optical feedback scheme is presented. The device is based on the gain difference in the SOA and DFB laser diode for the different stable states. Flip-flop operation is shown for set and reset pulse widths of 10 and 150ps of 5W and 3.5mW respectively

Numerical study of ultra-high speed wavelength conversion using a gain-clamped SOA in combination with optical filtering

Using numerical simulations, we demonstrate that wavelength conversion of 40 Gb/s and 160 Gb/s RZ signals is feasible using only a Gain-Clamped SOA (GCSOA) and optical filters. The signal is converted to the lasing wavelength of the GCSOA and no extra CW probe is thus required. The scheme is based on the optical filtering of the chirp of the lasing field induced by the input signal