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Time-resolved chirp of Pre-Impulse Step Injected Current modulated Semiconductor Optical Amplifier

Using Pre-Impulse Step Injected Current (PISIC) technique, it is possible to significantly improve the Semiconductor Optical Amplifier (SOA) rising time, although that will also affect chirp. Therefore, it is important to make a quantifying analysis of the event. The measurements are made using the intensity to frequency conversion provided by sharp optical filters. In this work two fixed filters are used instead of one alone, as available in the literature. The results evince chirp peaks during the SOA off-on gain rising time and at the on-off gain decay. The chirp values we found are coherent with published results.