• Title : Gain Dynamics in Quantum Dot Semiconductor Optical Amplifiers at 1550nm
• Author : G. Contestabile, A. Maruta, and K. Kitayama
• Journal : to appear in IEEE Photonic Technol. Lett..
• Abstract : We report an experimental study of the gain recovery of a InAs/InGaAsP columnar-quantum-dot Semiconductor Optical Amplifier (CQD-SOA) around 1550 nm. We find a three-step recovery process that follows three different exponential trends. This process gives, in case of a quite complete gain saturation, around 85% gain recovery in only 10 ps and 100% in around 30 ps. We also give a possible physical interpretation for this peculiar gain recovery trend.

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