Photonic millimeter wave signal generation and
stabilization based on nonlinear dynamics of optically injected
discrete-mode semiconductor lasers with photonic filter feedback
are experimentally and numerically studied. The photonic filter is
constructed by jointing two ports of a 2×2 optical coupler to form
a ring cavity recirculation and is modelled as an infinite impulse
response filter. The results show that >30GHz photonic millimeter
wave signals can be obtained after optical to electrical conversion
of the period-one oscillation output of the optically injected
discrete-mode semiconductor laser. More importantly, the
linewidth, side peak suppression ratio, as well as the stability of
the generated millimeter wave, can be optimized using the
photonic filter feedback. A fair comparison of the photonic filter
feedback scheme and the single/double optical feedback schemes
in terms of optimization performance has been made. The
corresponding results demonstrate that the photonic filter
feedback scheme has obvious superiority in millimeter wave side
peak suppression and stability. The effect of the coupling
coefficient as well as the phase variables in the ring cavity has also
been discussed in the simulation work and the results qualitatively
agree with the experimental observations.