The dynamics of nonlinear processes in quantum dot (QD) semiconductor optical amplifiers (SOAs) are investigated. Using small-signal measurements, the suitabilities of cross-gain and cross-phase modulation as well as four wave mixing (FWM) for wavelength conversion are examined. The cross-gain modulation is found to be suitable for wavelength conversion up to a frequency of 40 GHz.
© 2008 Chinese Optics Letters
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices
D. Bimberg, C. Meuer, M. Lammlin, S. Liebich, J. Kim, A. Kovsh, I. Krestnikov, and G. Eisenstein, "Nonlinear properties of quantum dot semiconductor optical amplifiers at 1.3 \mm," Chin. Opt. Lett. 6, 724-726 (2008)