Pulse-train solutions and excitability in an optoelectronic oscillator
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We study an optoelectronic time-delay oscillator with bandpass filtering for different values of the filter bandwidth. Our experiments show novel pulse-train solutions with pulse widths that can be controlled over a three-order-of-magnitude range, with a minimum pulse width of ∼150 ps. The equations governing the dynamics of our optoelectronic oscillator are similar to the FitzHugh-Nagumo model from neurodynamics with delayed feedback in the excitable and oscillatory regimes. Using a nullclines analysis, we derive an analytical proportionality between pulse width and the low-frequency cutoff of the bandpass filter, which is in agreement with experiments and numerical simulations. Furthermore, the nullclines help to describe the shape of the waveforms. © Europhysics Letters Association.
Published Version (Please cite this version)10.1209/0295-5075/96/34001
Publication InfoCallan, KE; Gauthier, Daniel J; Rosin, DP; & Schöll, E (2011). Pulse-train solutions and excitability in an optoelectronic oscillator. EPL, 96(3). pp. 1-6. 10.1209/0295-5075/96/34001. Retrieved from http://hdl.handle.net/10161/5102.
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Research Professor of Physics
Prof. Gauthier is interested in a broad range of topics in the fields of nonlinear and quantum optics, and nonlinear dynamical systems. In the area of optical physics, his group is studying the fundamental characteristics of highly nonlinear light-matter interactions at both the classical and quantum levels and is using this understanding to develop practical devices. At the quantum level, his group has three major efforts in the area of quantum communication and networking. I