Optical Chaos Generation and Synchronization by Optical Ring Resonator

Abstract

In this experimental study, a semiconductor laser is used to construct a new
proposed scheme for fiber optics chaos generation and synchronization. This
laser is subjected to a nonlinear optical feedback. The input electric pumping
power and optical feedback strength, re-injected to the laser itself, are
controlling the laser instability. The optical chaos, as a nonlinear effect, is
successfully generated. This is due to the interaction between the nonlinearity
generated by the feedback power, within the fiber loop mirror (outside the
laser) and the active medium for the laser device. The laser in such a situation
could be interpreted as a mutual Self Electro-Optic Effect Device (SEED).
Another identical laser is successfully setup such that it operated under chaos
in similar operating conditions as in the first laser. These two identical lasers
are connected together as a closed - loop couple. Identical chaotic
synchronization was obtained and examined. A frequency message was
modulated in the transmitter laser (master laser) and successfully impeded
within the generated chaos signal. The same message was successfully
received securely in the receiver laser (slave laser). This is to the application
of secure optical communication systems.