Effects of gain and bandwidth on the multimode behavior of optoelectronic microwave oscillators.
We show that when subjected to high gain, delay-line optoelectronic oscillators can display a strongly multimode behavior depending on the feedback bandwidth. We found that this dynamical regime may arise when the bandwidth of the feedback loop spans over several hundreds of ring cavity-modes, and also when the oscillator is switched on abruptly. Such a persistent multimode regime is detrimental to the performances of this system which is normally intended to provide ultra-pure and single-mode microwaves. We experimentally evidence this multimode dynamics and we propose a theory to explain this undesirable feature.
Département d'Optique, Institut FEMTO-ST, 16 Route de Gray, 25030 Besançon cedex, France. yanne.chembo@femto-st.fr
Y
Y
Kouomou Chembo
Laurent
L
Larger
Ryad
R
Bendoula
Pere
P
Colet
D000669:Amplifiers, Electronic; D003198:Computer Simulation; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008872:Microwaves; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D009991:Oscillometry / Q000295:instrumentation*; D012542:Scattering, Radiation