A comprehensive comparison between the characteristics of conventional electrical pumping
and the new optical pumping (OP) schemes in quantum dot semiconductor optical
amplifiers (QD-SOAs) has been done and has proved that the optical pumping scheme can
significantly improve the dynamical properties of QD-SOAs. Analytical solutions have been
presented to justify the optical properties in both pumping methods in CW operation
mode. Also, pulse-mode operation has been investigated through numerically solved rate
equations. Besides obviating the deficiencies of electrical pumping, optically pumped SOAs
(OP-SOAs) can be attractive alternatives for high-speed all-optical signal processing.
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