Gain Dynamics in Quantum Dot Semiconductor Optical Amplifiers at 1550nm
- 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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