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

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3 Author(s)
Contestabile, G. ; Scuola Superiore Sant''Anna, Pisa, Italy ; Maruta, A. ; Kitayama, K.

We report an experimental study of the gain recovery of an InAs-InGaAsP-InP columnar-quantum-dot semiconductor optical amplifier around 1550 nm. We find a three-step recovery process that gives around 85% gain recovery in only 10 ps and 100% in around 30 ps in case of a quite complete gain saturation. We also give a possible physical explanation for the peculiar gain dynamics.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 13 )