Abstract
We numerically investigate the chaos synchronization and message
transmission between two mutual coupling semiconductor lasers (MCSLs)
subject to identical unidirectional injections (UIs) from an external cavity
semiconductor laser (ECSL). The synchronization between the MCSLs is
realized through injection locking in conjunction with symmetric operation.
The simulation results show that stable isochronal synchronization between
the MCSLs can be achieved under proper driving injections. This type of
synchronization is robust to parameter mismatch up to tens of percentage and
frequency detuning of several tens of gigahertz, which is much better than
those of the MCSLs systems with self-feedback. Moreover, the investigations
on the mutual chaos pass filtering effects and the message transmission
indicate that the isochronal synchronization allows mutual message exchange
with a bit rate higher than 10Gb/s, when the chaos
modulation technology is adopted. In addition, the MCSLs can synchronize
with the ECSL for proper UI and MC, which provides an opportunity for array
chaos synchronization and chaos communication networks. Finally,
leader/laggard synchronization can also be achieved in the proposed
system.
© 2010 IEEE
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