Broadband random optoelectronic oscillator

Abstract

Random scattering of light in transmission media has attracted a great deal of attention in the field of photonics over the past few decades. An optoelectronic oscillator (OEO) is a microwave photonic system offering unbeatable features for the generation of microwave oscillations with ultra-low phase noise. Here, we combine the unique features of random scattering and OEO technologies by proposing an OEO structure based on random distributed feedback. Thanks to the random distribution of Rayleigh scattering caused by inhomogeneities within the glass structure of the fiber, we demonstrate the generation of ultra-wideband (up to 40 GHz from DC) random microwave signals in an open cavity OEO. The generated signals enjoy random characteristics, and their frequencies are not limited by a fixed cavity length figure. The proposed device has potential in many fields such as random bit generation, radar systems, electronic interference and countermeasures, and telecommunications.

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

“…22). The authors of [138] showed that, in this case, the plasmonic enhancement of the fields near the quantum dots did not occur and they were not excited (see ( 54)).…”

“…22b). Analyzing the decay times of quantum dots in the presence of an Au nanocube and without it, one can estimate the Purcell factor, that turns out to be of the order of 30 [138]. In the same work, the autocorrelation function of emitted photons g (2) (0) ∼0.35 was investigated, showing that there is emission of single photons.…”

“…21a). Quite recently, a very interesting experimental work has appeared on the implementation and study of a hybrid nanostructure consisting of a cubic gold nanocrystal with the edge of 100 nm, with dielectric polymer "wings" deposited on the opposite edges (n = 1.5) and doped with CdSe/CdS/Zn (core / shell / shell) colloidal quantum dots [138] (see Fig. 22a).…”

Broadband random optoelectronic oscillator based on stimulated Brillouin scattering

“…OEO has be developed to generate a variety of signals, such as the single-mode signal, frequency-scanning signal and the phase-coded signals. In 2020, Li Ming's team demonstrated for the first time that broadband random microwave signals can be generated by optoelectronic oscillation [5] . The work realized the generation of ultra-wideband (DC up to 40 GHz) random microwave signals by combining Rayleigh scattering effect and OEO structure.…”

Uncertainty Evaluation on a 10.52 GHz (5 dBm) Optoelectronic Oscillator Phase Noise Performance

“…Chew et al developed an OEO for a very precise temperature sensor [ 7 ]. Ge et al proposed an open cavity OEO to generate random microwave signals up to 40 GHz [ 8 ]. Fan et al created a photonic-delay line cross-correlation method for improving the used phase noise measurement of an OEO [ 9 ].…”