Abstract
We present and demonstrate all-optical clock recovery (CR) from the input single-
and multiwavelength return-to-zero (RZ) data, using a single multiquantum-well
Fabry–Pérot semiconductor optical amplifier (FP-SOA) with no additional amplitude
equalization measures. The influence of the FP-SOA facet reflectivity on the amplitude
equalization of the recovered clock was numerically investigated. A stable 36.55 GHz
optical clock with an extinction ratio of 11.0 dB and a root-mean-square timing jitter
of 575 fs was extracted from the input, which consisted of 2<sup>23</sup> -1 pseudorandom
binary sequences of RZ data. The presented scheme has the potential to perform CR from
more than 100 Gbit/s of RZ data, and it has the advantage of wideband and parallel
operation.
© 2012 IEEE
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