Optoelectronic oscillators (OEO)
are a recent addition to achieve high
frequency sources. These oscillators
employ an elegant opto-electronic
feedback loop approach to the generation
of microwave frequencies. The
OEO is a generic architecture consisting
of a laser as the source of light energy.
The laser radiation propagates
through a modulator and an optical energy
storage element, before it is converted
to electrical energy with a photo-detector