All-optical logic circuits based on the nonlinear properties of the semiconductor optical amplifier

Abstract

This work shows the importance of utilizing the nonlinear properties of the semiconductor optical amplij7er SOA in constructing optical logic gates, half and full adders, flip-flops, counters and registers. Consequently, SOA may be considered as a promising component for building all-optical digital computer.By using the SOASIMsoftware, this paper shows how the optical buffer, inverter, unitstep pulse and fallinghising clock edges can be generated.

A method to implement optical logic AND based on FWM effect of SOA

“…We successfully demonstrated logic operation AND. The biggest advantage of this method is not limited by carrier recovery time in the SOA, can deal with higher rate optical signals [1][2][3][4][5][6] .…”

A method to implement NOR OR optical gate Based on a single SOA’s NPR effect

“…It can generate two logic functions by simply adjusting the polarization state of light signal under the condition of without changing its structure. We successfully demonstrated reconfigurable logic operations NOR and OR using 10Gbit/s NRZ polarization signals [1][2][3] .…”