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We propose and investigate a new scheme to realize optical logic gates using polarization addition with direct detection. Two polarizations of an optical signal are modulated, respectively, by independent binary inputs to represent four different states, while direct detection is used to map the four states to the corresponding binary output. Up to 25 logic gates, including all the basic logic gates,...
We propose and investigate a new scheme to realize all-optical logic gates using a single I/Q modulator with direct detection. Both intensity and phase of the optical signal are utilized to represent the four different states of two binary inputs, whereas direct detection is used to map the four states to the corresponding binary output. This structure is very simple and has the potential to reach...
We propose a novel scheme of realizing all-optical logic gates based on a single I/Q modulator and direct detection by adjusting bias voltages of the two arms, peak-peak voltages of the driving signals and the phase shift. Experiments are successfully carried out to demonstrate four logic gates of OR, AND, XOR and NOR at the bit rate of 1Gbit/s with extinction ratio higher than 11 dB.
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