High power performance of asymmetric Fabry-Perot MQW modulators

We have demonstrated experimentally that a normally-on surface normal asymmetric Fabry-Perot modulator can still operate at high optical powers (equivalent to intensities of >20 kW/cm²). We have identified two distinct operating regimes: one thermally assisted regime where the maximum reflection change increases at high powers and peak values of 75% are achieved, and one nonthermal regime where reflection changes approaching 55% are achieved albeit at higher applied voltages