Cascaded semiconductor optical amplifier (SOA) gates using polarization multiplexing technique (PMT) are experimentally demonstrated for the first time. The penalty is smaller than 1 dB after three SOA gates. Numerical simulation shows that cascaded SOA gates operated at single-channel can endure some gain polarization sensitivity (GPS) of the SOA, but, even a small GPS will rapidly reduce the number of cascaded SOA gates operated at multi-channels. Experiment shows that in addition to GPS, four-wave mixing (FWM) will also affect the performance of SOA gates when operated in a multi-channel system.
|Publication status||Published - 2000|