Abstract
A new and novel scheme for a high speed all-optical half adder based on single
Quantum-dot semiconductor optical amplifier (QD-SOA) assisted Mach-Zehnder
interferometer (MZI) is theoretically investigated and discussed. In this proposed
scheme, pair of input data streams are simultaneously drive the switch to produce
sum and carry. In this new design, only single switch can be utilized
to design half adder circuit and no additional input beam is required other than two
input signals. This design is simpler, smaller and compact than our previously proposed
design. The impact of the peak data power as well as of the QD-SOAs current density and
maximum modal gain on the ER, Q factor with current densities and electron relaxation
times etc are explored and assessed by means of numerical simulations.
© 2013 IEEE
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