Figure 1From: Symmetric periodic solutions of delay-coupled optoelectronic oscillators Schematic of the cross-coupled optoelectronic oscillators: LD, laser diodes; PC, polarization controllers; MZM, Mach-Zehnder modulators; C, optic circulators; α , adjustable optic attenuators; D, photodetectors; S, electronic splitters; MD, modulator drivers. Back to article page