Abstract
We propose a technique to generate broadband chaotic and breather signals employing an optoelectronic
oscillator (OEO) comprising a phase modulator (PM) and a linearly chirped fiber Bragg grating (LCFBG). The joint
operation of the PM and the LCFBG forms a broadband microwave photonic filter (MPF), which allows the OEO to generate
chaotic signals and breathers taking advantage of the interplay between the broadband MPF and the time-delayed
feedback loop provided by a long optical fiber delay line. The breather excitations are characterized by nanosecond
chaotic oscillations breathing periodically at a significantly lower time-scale determined by the OEO large delay
time. A theoretical analysis based on a modified Ikeda time-delayed model to include the effect of the broadband
filtering process is provided. The analysis is verified by an experiment. The proposed LCFBG-based OEO and the
possibility to control in the optical domain its broadband bandpass characteristics considering the flexibility,
accuracy, and precision in FBG fabrication can find applications in chaos-based communications and in fast optical
processing systems, such as random number generation, or optical processing in reservoir computing taking advantage of
the intrinsic multiple time scales of the LCFBG-based OEO.
© 2014 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription