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Optoelectronic oscillators (OEOs) are promising low phase noise radio frequency sources. However, the long fiber loops required for a high Oscillator Q also lead to spurious modes (spurs) spaced too narrowly to be filtered by standard electronic devices. As a solution to this problem, the dual injection-locked OEo (DIL-OEO) has been proposed and studied. Previously, we presented experimental data...
Optoelectronic oscillators (OEOs) are used to generate RF signals in the X-band region with a very low phase noise. These hybrid opto-electronic devices are based on a long optical fiber that forms a very high-Q RF cavity. We have studied theoretically and experimentally single-loop and dual-loop optoelectronic oscillators. Excellent agreement between theory and experiments was obtained. The results...
We investigate the physics of bidirectional injection-locking in optoelectronic oscillators (OEO). In particular, we identify the effects of injection strength on phase noise and spurious modes for a dual injection-locked OEO. Our experimental data is then used to design a numerical model of a dual injection-locked OEO. This model will be used in the future to optimize the multi-dimensional injection-locking...
Dual-loop optoelectronic oscillators are used to obtain high-frequency harmonic signal with a very low phase noise while maintaining very low spurs. However, the fundamental limits of these devices are not known. Therefore, it is essential to develop theoretical models to improve the performance of dual-loop optoelectronic oscillators (OEOs) and in particular the performance of the dual-injection-locked...
We derive the equations that govern the phase noise at steady state in two coupled oscillators with delay. This simple model is then applied to the dual-injection-locked opto-electronic oscillator (DIL-OEO). This model is an extension of the Yao-Maleki model from one OEO loop to two, and it is complementary to other work on full simulations and experiments that we have carried out. We use this model...
We present an experimental study of the phase noise spectrum's dependence on the loop length in OEOs. As the loop length increases, the spectrum deviates significantly from the ideal dependence.
A comprehensive model to accurately study phase noise and dynamics in optoelectronic oscillators is presented. The model results are compared to experiments. The comparison shows that the flicker noise increases as the cavity length increases.
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