Abstract
We investigated the feasibility of using an optical divider
circuit with a semiconductor optical amplifier Mach–Zehnder
interferometer (SOA-MZI)-based exclusive or (xor) gate for an
all-optical forward error detection and correction scheme with a
cyclic code. We employed a conventional cyclic code scheme: the same
divider circuit acts as both encoder and decoder with a given
generator polynomial. The divider circuit consists of cascaded xor
circuits and feedback lines. Therefore, the performance of the xor
circuit is one of the key factors for realizing an all-optical
scheme. We numerically investigated the operation performance of the
SOA-MZI-based all-optical xor gate. Dynamic operation was simulated
using rate equations via the transfer matrix method. The xor
function was also investigated experimentally. The eye diagram
obtained from the simulation at a bit rate of 10 Gb/s showed good
qualitative agreement with experimental results. Additionally, we
confirmed that the optimal condition for a high quality factor
(<i>Q</i>-factor) is obtained with equal power for each signal. Next, we
demonstrated all-optical divider processing with the SOA-MZI-based
xor circuit and a feedback line that forms the generator polynomial
<i>x</i> + 1. The preliminary results for division operation could be
verified.
© 2011 IEEE
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