Chirp Reduction in Directly Modulated Multi-electrode RSOA Devices in Passive Optical Networks

We demonstrate that the use of an optimized bielectrode reflective semiconductor optical amplifier as remote modulator reduces the chirp therefore the penalties for transmission from 6 to 4.5 dB on standard fibre at 2.5 Gbit/s over 50 km. 

Simulation of carrier density are presented in order to explain the chirp reduction in multi-electrodes RSOAs. Using trielectrodes devices, penalty of 3 dB is obtained on same transmission conditions.