Abstract
In this work we performed a numerical study of optical logic gates based
on a Sagnac interferometer, operating with short optical pulses (10 ps)
in a PAM-ASK modulation scheme with binary amplitude modulation scheme.
We examined the performance of a nonlinear Sagnac interferometer
implementing two-input logical functions. We evaluated the effect
resulting from an increment in the PAM coding parameter offset
(epsilon), considering the anomalous group velocity dispersion (GVD) and
nonlinear self phase modulation (SPM) in a lossless configuration. By
analysing the transmitted output, we conclude it is possible to obtain
logic gates OR for two different power-splitting ratios rho of the coupler (rho = 0.1 and 0.2). After this step, we applied a dephasing control to the input pulses, aiming to achieve logic gates with rho = 0.3 and rho = 0.4 and to enhance the study of cases in which they had
not been previously obtained. We obtained OR and AND logic gates with a phase variation study for rho = 0.1 and 0.2. For rho = 0.3 and 0.4, the
variety and versatility of logic gates proved to be very broad where OR,
AND and XOR gates were obtained. (C) 2015 Published by Elsevier Ltd.
Users
Please
log in to take part in the discussion (add own reviews or comments).