Conditions for Parametric and Free-Carrier Oscillation in Silicon Ring Cavities

We model optical parametric oscillation in ring cavities with two-photon absorption, focusing on silicon at 1.55 μm. Oscillation is possible if free-carrier absorption can be mitigated; this can be achieved using carrier sweep-out in a reverse-biased p-i-n junction to reduce the carrier lifetime. By varying the pump power, detuning, and reverse-bias voltage, it is possible to generate frequency co...