  We report the construction and characterization of a comprehensive
magnonic-opto-electronic oscillator (MOEO) system based on 1550-nm photonics
and yttirum iron garnet (YIG) magnonics. The system exhibits a rich and
synergistic parameter space because of the ability to control individual
photonic, electronic, and magnonic components. Taking advantage of the spin
wave dispersion of YIG, the frequency self-generation as well as the related
nonlinear processes become sensitive to the external magnetic field. Besides
being known as a narrowband filter and a delay element, the YIG delayline
possesses spin wave modes that can be controlled to mix with the optoelectronic
modes to generate higher-order harmonic beating modes. With the high
sensitivity and external tunability, the MOEO system may find usefulness in
sensing applications in magnetism and spintronics beyond optoelectronics and
photonics.
