Abstract
The dynamic behavior of an optical micro ring resonator (OMRR) with an
amplitude modulator positioned in the micro ring is investigated quantitatively by
adopting a recently introduced quantifier, the permutation entropy (PE). The effects
of modulation depth are focused on, and the roles of input power are considered. The
two-dimensional (2D) maps of PE showing dependence on both modulation depth and
input power are presented as well. PE values nearly increase with modulation depth.
On the other hand, the optimal value of input power is achieved when the PE reaches
its maximum. Thus, PE can successfully quantify the dynamics of modulated OMRR.
Selecting the parameters in the region with high PE values would contribute to the
complexity-enhanced OMRR-based chaotic communication systems.
© 2011 Chinese Optics Letters
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