Wideband chaos generation using a delayed oscillator and a two-dimensional nonlinearity induced by a quadrature phase-shift-keying electro-optic modulator
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Date
2011-08
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Université de M'sila
Abstract
We present a new optoelectronic architecture intended for chaotic optical intensity generation. The principle relies
on an electro-optic nonlinear delay dynamics, where the nonlinearity originates from an integrated four-wave
optical interferometer, involving two independent electro-optic modulation inputs. Consequently, the setup
involves both two-dimensional nonlinearity and dual-delay feedback dynamics, which results in enhanced chaos
complexity of particular interest in chaos encryption schemes. The generated chaos observed with large feedback
gains has a bandwidth ranging from 30 kHz to 13 GHz and is confirmed by numerical simulations of the proposed
dynamical model and bifurcation diagram calculation.